1. A compound for an encapsulation film, characterized in that the compound for an encapsulation film has a general structural formula as shown in formula 1 below:

wherein, R1-R4 are each independently selected from H, alkyl with carbon atom less than 30, alkoxy with carbon atom less than 30, fluorine-containing alkyl with carbon atom less than 30, aryl with carbon atom less than 30, substituted aryl with carbon atom less than 30, aromatic heterocyclic group with carbon atom less than 30, and substituted aromatic heterocyclic group with carbon atom less than 30;

X1-X2 are each independently selected from the group consisting of alkyl groups having less than 30 carbon atoms, alkoxy groups having less than 30 carbon atoms, fluoroalkyl groups having less than 30 carbon atoms, aryl groups having less than 30 carbon atoms, substituted aryl groups having less than 30 carbon atoms, aromatic heterocyclic groups having less than 30 carbon atoms, substituted aromatic heterocyclic groups having less than 30 carbon atoms,

or, each is independently selected from the following structures:

y1, Y2 are selected from the following structures:

y8 is independently selected from any one of hydrogen or substituted or unsubstituted C1-C50 alkyl,

wherein, is the bonding position of the element.

2. The compound for an encapsulation film according to claim 1, wherein the compound for an encapsulation film is selected from the group consisting of formula 001-:

3. the ink composition is characterized by comprising the following raw materials in percentage by weight: the encapsulating film compound according to claim 1 or 2, wherein the compound is 9.5 to 90%, the photoinitiator is 0.5 to 10%, and the acrylic monomer is 9.5 to 90%.

4. The ink composition according to claim 3, wherein the photoinitiator is a photopolymerization initiator and/or a radical polymerization initiator.

5. The ink composition according to claim 4, wherein the photopolymerization initiator is one or a combination of acetophenone, benzophenone, thioxanthone, benzoin-based, benzoin, triazine, carbazolyl, diketone, boric acid sulfonic acid, diazo, imidazolyl and bisimidazolyl compounds.

6. The ink composition according to claim 4, wherein the radical polymerization initiator is a peroxide-based compound and/or an azobis-based compound.

7. A method of preparing an ink composition, comprising the steps of:

(1) weighing the raw materials according to the weight percentage of the ink composition of any one of claims 3 to 6 for later use;

(2) the ink composition is obtained by uniformly mixing the compound for the encapsulation film according to claim 1 or 2, the photoinitiator and the acrylic monomer under vacuum stirring and filtering.

8. The method of claim 7, wherein the vacuum stirring is performed at 40-60 ℃ for 80-100h in step (2).

9. A thin film packaging structure is characterized in that the thin film packaging structure is formed by alternately laminating an inorganic layer and an organic layer for more than 1 time, and the outermost layer is an inorganic layer;

wherein the material of the organic layer is the ink composition according to any one of claims 3 to 6 or the ink composition prepared according to claim 7 or 8;

the material of the inorganic layer is selected from any one or combination of several of silicon nitride, silicon oxynitride, silicon oxide, aluminum oxide, zirconium oxide, titanium oxide and zinc oxide.

10. The thin film encapsulation structure according to claim 9, wherein the thickness of the thin film encapsulation structure is 0.3-20 μm, and the thickness of the organic layer is greater than the thickness of the inorganic layer.

Background

Organic Light Emitting Diodes (OLEDs) are considered to be one of the most promising display technologies because of their advantages of self-brightness, fast response, wide viewing angle, ultra-thin, high definition, and durability. In particular, OLEDs are particularly suitable for flexible displays, and are widely accepted as next generation Cathode Ray Tubes (CRTs) and Flat Panel Displays (FPDs). In the case of OLED technology, device encapsulation is the most demanding task, since OLEDs require a high degree of protection against moisture and oxygen penetration. Therefore, a high performance gas diffusion barrier is a crucial factor for improving the reliability and lifetime of OLEDs. The conventional encapsulation method is to encapsulate the OLED device with a glass cover or metal in an inert atmosphere, and there is no way to use the encapsulation material on a flexible OLED display screen because the encapsulation material is hard.

The thin film encapsulation structure is a structure in which at least one layer of inorganic films and at least one layer of organic films are alternately stacked on top of an organic light emitting device to be formed in a display range of a substrate, so as to cover the display range and protect the organic light emitting device. The organic light emitting display device having the thin film encapsulation layer optimizes flexibility of the device together with the substrate having flexibility. In addition, the organic light emitting display device enables various designs (e.g., a folding structure) of the device, and most importantly, a thin type.

In the preparation process of the packaging film, the residual micromolecule substances in the organic layer film-forming process are easy to generate miscellaneous gas, and the data shows that the out-gas (miscellaneous gas emission) value is increased. Most of the currently used inorganic films are deposited by a method of generating plasma through sputtering (sputtering) or vapor deposition (CVD), and when more impurity gases remain in the organic films, the remaining impurity gases are released, which causes the flatness of the upper inorganic film to be reduced, which causes the WVTR to be increased, thereby adversely affecting the devices to be protected.

Therefore, it is an urgent need to solve the problems of the art to provide a compound for an encapsulation film, an ink composition comprising the same, and a film encapsulation structure, which can provide a low out-gas characteristic after the film encapsulation structure is prepared.

Disclosure of Invention

In view of the above, the present invention provides a compound for an encapsulation film, an ink composition including the same, and a film encapsulation structure, in which the compound for an encapsulation film is used in the ink composition, and then the compound for an encapsulation film is provided with an antioxidant base having two or more photocuring groups to improve stability, and after the film encapsulation structure is manufactured, the low out-gas characteristic thereof enables a flexible organic light emitting device to have higher stability.

In order to achieve the purpose, the invention adopts the following technical scheme: a compound for an encapsulation film, characterized in that the compound for an encapsulation film has a general structural formula as shown in formula 1 below:

chemical formula 1;

wherein, R1-R4 are each independently selected from H, alkyl with carbon atom less than 30, alkoxy with carbon atom less than 30, fluorine-containing alkyl with carbon atom less than 30, aryl with carbon atom less than 30, substituted aryl with carbon atom less than 30, aromatic heterocyclic group with carbon atom less than 30, and substituted aromatic heterocyclic group with carbon atom less than 30;

X1-X2 are each independently selected from the group consisting of alkyl groups having less than 30 carbon atoms, alkoxy groups having less than 30 carbon atoms, fluoroalkyl groups having less than 30 carbon atoms, aryl groups having less than 30 carbon atoms, substituted aryl groups having less than 30 carbon atoms, aromatic heterocyclic groups having less than 30 carbon atoms, substituted aromatic heterocyclic groups having less than 30 carbon atoms,

or, each is independently selected from the following structures:

y1, Y2 are selected from the following structures:

y8 is independently selected from any one of hydrogen or substituted or unsubstituted C1-C50 alkyl,

wherein, is the bonding position of the element.

The invention has the beneficial effects that: the compound for encapsulating film of the present invention can be used for producing a composition having one or more of a compound or a mixture having one or more of an acryl group which can be cured by other light and heat, a compound or a mixture having one or more of a radical and an acid which can be cured by light or heat, and which has a water vapor transmission rate of 9X 10-²g/m²Day or less.

Preferably, the compound for encapsulation film is selected from the following chemical formula 001-:

the invention also provides an ink composition, which comprises the following raw materials in percentage by weight: the encapsulating film compound according to claim 1 or 2, wherein the compound is 9.5 to 90%, the photoinitiator is 0.5 to 10%, and the acrylic monomer is 9.5 to 90%.

Preferably, the acrylic monomer is 2-phenoxyethylacrylic acid, 2-phenoxyethyl (meth) acrylic acid, 3-phenoxypropylacrylic acid, 3-phenoxypropyl (meth) acrylic acid, 4-phenoxybutylacrylic acid, 4-phenoxybutyl (meth) acrylic acid, 5-phenoxypentylacrylic acid, 5-phenoxypentyl (meth) acrylic acid, 6-phenoxyhexylacrylic acid, 6-phenoxyhexyl (meth) acrylic acid, 7-phenoxyheptylacrylic acid, 7-phenoxyheptyl (meth) acrylic acid, 8-phenoxyoctylacrylic acid, 8-phenoxyoctyl (meth) acrylic acid, 9-phenoxynonylacrylic acid, 10-phenoxydecylacrylic acid, 10-phenoxydecyl (meth) acrylic acid, 2- (phenylthio) ethacrylic acid, 2- (phenylthio) ethyl (meth) acrylic acid, 3- (phenylthio) propylacrylic acid, 3- (phenylthio) propyl (meth) acrylic acid, 4- (phenylthio) butylacrylic acid, 4- (phenylthio) butyl (meth) acrylic acid, 5- (phenylthio) pentylacrylic acid, 5- (phenylthio) pentyl (meth) acrylic acid, 6- (phenylthio) hexylacrylic acid, 6- (phenylthio) hexyl (meth) acrylic acid, 7- (phenylthio) heptylacrylic acid, 7- (phenylthio) heptylmeth) acrylic acid, 8- (phenylthio) octylacrylic acid, 9- (phenylthio) nonylacrylic acid, 9- (phenylthio) nonyl (meth) acrylic acid, 10- (phenylthio) decyl (meth) acrylic acid, 2- (naphthalen-2-yloxy) ethacrylic acid, 2- (naphthalen-2-yloxy) ethyl (meth) acrylic acid, 3- (naphthalen-2-yloxy) propylacrylic acid, 3- (naphthalen-2-yloxy) propyl (meth) acrylic acid, 4- (naphthalen-2-yloxy) butylacrylic acid, 4- (naphthalen-2-yloxy) butyl (meth) acrylic acid, 5- (naphthalen-2-yloxy) pentylacrylic acid, 5- (naphthalen-2-yloxy) pentyl (meth) acrylic acid, 6- (naphthalen-2-yloxy) hexylacrylic acid, 6- (naphthalen-2-yloxy) hexyl (meth) acrylic acid, 7- (naphthalen-2-yloxy) heptylacrylic acid, 8- (naphthalen-2-yloxy) octylacrylic acid, 9- (naphthalen-2-yloxy) nonylacrylic acid, 9- (naphthalen-2-yloxy) nonyl (meth) acrylic acid, 10- (naphthalen-2-yloxy) decylacrylic acid, 10- (naphthalen-2-yloxy) decyl (meth) acrylic acid, 2- (naphthalen-2-ylthio) ethacrylic acid, 2- (naphthalen-2-ylthio) ethyl (meth) acrylic acid, 3- (naphthalen-2-ylthio) propylacrylic acid, 3- (naphthalen-2-ylthio) propyl (meth) acrylic acid, 4- (naphthalen-2-ylthio) butylacrylic acid, 4- (naphthalen-2-ylthio) butyl (meth) acrylic acid, 5- (naphthalen-2-ylthio) pentylacrylic acid, 5- (naphthalen-2-ylthio) pentyl (meth) acrylic acid, 6- (naphthalen-2-ylthio) hexylacrylic acid, 6- (naphthalen-2-ylthio) hexyl (meth) acrylic acid, 7- (naphthalen-2-ylthio) heptyl, acrylic acid, 7- (naphthalen-2-ylthio) heptyl (meth) acrylic acid, 8- (naphthalen-2-ylthio) octylacrylic acid, 8- (naphthalen-2-ylthio) octyl (meth) acrylic acid, 9- (naphthalen-2-ylthio) nonyl (meth) acrylic acid, 10- (naphthalen-2-ylthio) decyl (meth) acrylic acid, 2- ([1, 1' -biphenyl ] -4-yloxy) ethacrylic acid, 2- ([1, 1' -biphenyl ] -4-yloxy) ethyl (meth) acrylic acid, 3- ([1, 1' -biphenyl ] -4-yloxy) propyl (meth) acrylic acid, 4- ([1, 1 '-biphenyl ] -4-yloxy) butylacrylic acid, 4- ([1, 1' -biphenyl ] -4-yloxy) butyl (meth) acrylic acid, 5- ([1, 1 '-biphenyl ] -4-yloxy) pentylacrylic acid, 5- ([1, 1' -biphenyl ] -4-yloxy) pentyl (meth) acrylic acid, 6- ([1, 1 '-biphenyl ] -4-yloxy) hexylacrylic acid, 6- ([1, 1' -biphenyl ] -4-yloxy) hexyl (meth) acrylic acid, 7- ([1, 1 '-biphenyl ] -4-yloxy) heptylacrylic acid, 7- ([1, 1', 1' -biphenyl ] -4-yloxy) heptyl (meth) acrylic acid, 8- ([1, 1' -biphenyl ] -4-yloxy) octyl (meth) acrylic acid, 9- ([1, 1' -biphenyl ] -4-yloxy) nonyl (meth) acrylic acid, 10- ([1, 1' -biphenyl ] -4-yloxy) decyl (meth) acrylic acid, 2- ([1, 1' -biphenyl ] -4-ylthio) ethyl acrylic acid, 2- ([1, 1 '-biphenyl ] -4-ylthio) ethyl (meth) acrylic acid, 3- ([1, 1' -biphenyl ] -4-ylthio) propylacrylic acid, 3- ([1, 1 '-biphenyl ] -4-ylthio) propyl (meth) acrylic acid, 4- ([1, 1' -biphenyl ] -4-ylthio) butylacrylic acid, 4- ([1, 1 '-biphenyl ] -4-ylthio) butyl (meth) acrylic acid, 5- ([1, 1' -biphenyl ] -4-ylthio) pentylacrylic acid, 6- ([1, 1' -biphenyl ] -4-ylthio) hexylacrylic acid, 6- ([1, 1' -biphenyl ] -4-ylthio) hexyl (meth) acrylic acid, 7- ([1, 1' -biphenyl ] -4-ylthio) heptylacrylic acid, 7- ([1, 1' -biphenyl ] -4-ylthio) heptylmeth) acrylic acid, 8- ([1, 1' -biphenyl ] -4-ylthio) octylacrylic acid, 8- ([1, 1' -biphenyl ] -4-ylthio) octylmeth) acrylic acid, 9- ([1, 1' -biphenyl ] -4-ylthio) nonylacrylic acid, 10- ([1, 1' -biphenyl ] -4-ylthio) decylacrylic acid, 2-hydroxy-2-phenoxyethacrylic acid, 2-hydroxy-2-phenoxyethyl (meth) acrylic acid, 2-hydroxy-2- (naphthalen-2-yloxy) ethacrylic acid, 2-hydroxy-2- (naphthalen-2-yloxy) ethyl (meth) acrylic acid, 2- ([1, 1' -biphenyl ] -4-yloxy) ethacrylic acid, 2- ([1, 1' -biphenyl ] -4-yloxy) ethyl (meth) acrylic acid, 2- (2-phenoxyethoxy) ethacrylic acid, 2- (2-phenoxyethoxy) ethyl (meth) acrylic acid, 2- (phenoxymethoxy) ethacrylic acid, 2- (phenoxymethoxy) ethyl (meth) acrylic acid, 2- (([1, 1 '-biphenyl ] -4-yloxy) methoxy) ethacrylic acid, 2- (([1, 1' -biphenyl ] -4-yloxy) methoxy) ethyl (meth) acrylic acid, 2- ((naphthalen-2-yloxy) methoxy) ethacrylic acid, 2- ((naphthalen-2-yloxy) methoxy) ethyl (meth) acrylic acid, 2- ((phenylthio) methoxy) ethacrylic acid, 2- ((phenylthio) methoxy) ethyl (meth) acrylic acid, 2- ((naphthalen-2-ylthio) methoxy) ethacrylic acid, 2- ((naphthalen-2-ylthio) methoxy) ethyl (meth) acrylic acid, 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 3,3'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3), 1-diene) diacrylic acid, 3,3' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 3,3' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (propane-3, 1-diene) diacrylate, 3,3' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (propane-3, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2' - (4, 4' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 3,3' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3, 1-diene) diacrylic acid, 3,3' - (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3, 1-diene) bis (2-methacrylic acid), 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 3,3'- (4, 4' - (9H-fluorene-9), 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3, 1-diene) diacrylate, 3,3'- (4, 4') - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (propane-3, 1-diene) bis (2-methylacrylic acid), 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene), -1 diene) diacrylic acid, 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, -1 diene) bis (2-methacrylic acid), 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, -1 diene) diacrylic acid, 2,2'- (4, 4' - (9H-fluorene-9, 9-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene) bis (oxy) bis (ethane-2, -1 diene) bis (2-methacrylic acid), 2,2' - (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' -oxybis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (4, 4' -oxybis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' -thiobis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene) diacrylate, 2,2' - (4, 4' -thiobis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' -thiobis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) diacrylate, 2,2' - (4, 4' -thiobis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (3, 3' - (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (3, 3' - (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (3, 3' - (4, 4' -thiobis (4, 1-phenylene) bis (oxy)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2), 1-diene) diacrylic acid, 2,2' - (3, 3' - (4, 4' -thiobis (4, 1-phenylene) bis (oxy)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (3, 3' - (4, 4' -oxybis (4, 1-phenylene) bis (diene)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (3, 3' - (4, 4' -oxybis (4, 1-phenylene) bis (diene)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2'- (3, 3' - (4, 4 '-thiobis (4, 1-phenylene) bis (diene)) bis (propane-3, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (4, 4'- (propane-2, 2-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene) diacrylate, 2,2' - (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene) bis (2-methacrylate), 2,2' - (2, 2' - (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene)) bis (ethane-2, 1-diene) diacrylate, 2,2' - (2, 2' - (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2'- (2, 2' - (4, 4'- (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (2, 2'- (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2'- (2, 2' - (2, 2'- (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2'- (2, 2' - (2, 2'- (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (oxy) bis (ethane-2, 1-diene)), 1-diene) bis (2-methacrylic acid, 2,2'- (2, 2' - (2, 2'- (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2'- (2, 2' - (2, 2'- (4, 4' - (propane-2, 2-diene) bis (4, 1-phenylene)) bis (diene) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene)), 1-diene) bis (2-methacrylic acid, 2,2'- (2, 2' - (2, 2'- (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2'- (2, 2' - (2, 2'- (4, 4' -oxybis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylate), 2,2'- (2, 2' - (2, 2'- (4, 4' -thiobis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) diacrylate, 2,2'- (2, 2' - (4, 4 '-thiobis (4, 1-phenylene) bis (oxy)) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), 2,2' - (2, 2'- (2, 2' - (4), 4 '-thiobis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) bis (oxy) bis (ethane-2, 1-diene) diacrylic acid, 2,2' - (2, 2'- (4, 4' -thiobis (4, 1-phenylene) bis (diene)) bis (ethane-2, 1-diene) bis (oxy) bis (ethane-2, 1-diene)) bis (oxy) bis (ethane-2, 1-diene) bis (2-methacrylic acid), polyester urethane diacrylate, sapropenyldiacrylate, polyester urethane, epoxyacrylic acid, phenylthioethyl (meth) acrylic acid, isononyl acrylate, phenoxy-2-methyl- (meth) acrylate ethyl, phenoxybenzyl acrylate, 3-pentoxy-2-methyl-ethyl (meth) acrylate, phenoxybenzyl alcohol, 3-phenoxy-2-stearyloxy (meth) acrylate, 2-1-naphthyloxyethyl (meth) acrylate, 2-2-naphthyloxyethyl (meth) acrylate, 2-1-ethanediol acrylate or 2-2-ethanediol acrylate, trimethylolpropane acrylate, 1, 12-dodecanediol dimethacrylate, 1, 6-ethanediol diacrylate, 1, 10-decanediol diacrylate and 1, 11-undecanediol dimethacrylate.

Preferably, the photoinitiator is a photopolymerization initiator and/or a radical polymerization initiator.

Preferably, the photopolymerization initiator is one or a combination of more of an acetophenone compound, a benzophenone compound, a thioxanthone compound, a benzoin-based compound, a benzoin compound, a triazine compound, a carbazolyl compound, a diketone compound, a boric acid sulfonic acid compound, a diazo compound, an imidazolyl compound and a biimidazole compound.

More preferably, the acetophenone-based compound is one or a combination of 2,2' -diethoxyacetophenone, 2,2' -dibutoxyacetophenone, 2-hydroxy-2-methylacetophenone, p-butyltrichloroacetophenone, t-butyldichloroacetophenone, 4-chloroacetophenone, 2,2' -dichloro-4-phenoxyacetophenone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one and 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butandin-1-one;

the compound of the benzophenone is one or a combination of more of benzophenone, benzoyl benzoate, methyl benzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4' -bis (dimethylamino) benzophenone, 4,4' -bis (diethylamino) benzophenone, 4,4' -dimethylamino benzophenone, 4,4' -dichlorobenzophenone and 3,3' -dimethyl-2-methoxybenzophenone;

the thioxanthone compound is one or a combination of a plurality of thioxanthone, 2-chlorothioxanthone, 2-methyl thioxanthone, isopropyl thioxanthone, 2, 4-diethyl thioxanthone, 2, 4-diisocyanate, propyl thioxanthone and 2-chlorothioxanthone;

the benzoin-based compound is one or a combination of benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether and benzyl dimethyl ketal;

examples of the compound of the triazine include 2,4, 6-trichloro-s-triazine, 2-phenyl-4, 6-bis (trichloromethyl) -s-triazine, 2- (3', 4' -dimethoxystyryl) -4, 6-bis (trichloromethyl) -s-triazine, 2- (4' -methoxynaphthyl) -4, 6-bis (trichloromethyl) -s-triazine, 2- (p-methoxyphenyl) -4, 6-bis (trichloromethyl) -s-triazine, 2- (p-tolyl) -4, 6-bis (trichloromethyl) -s-triazine, 2-biphenyl-4, 6-bis (trichloromethyl) -s-triazine, bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphthalene-1-yl) -4, 6-bis (trichloromethyl) -s-triazine, 2- (4-methoxy naphthalene-1-yl) -4, 6-bis (trichloromethyl) -s-triazine, 2-4-trichloromethyl (piperidyl) -6-triazine and 2-4-trichloromethyl (4' -methoxy styryl) -6-triazine.

Preferably, the radical polymerization initiator is a peroxide-based compound and/or an azobis-based compound.

More preferably, the peroxy compound is methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, cyclohexanone peroxide, methylcyclohexanone peroxide and acetylacetone peroxide, isobutyryl peroxide, 2, 4-dichlorobenzoyl peroxide, o-methylbenzoyl peroxide, bis 3, 5, 5-trimethylhexanoyl peroxide, 2,4,4, -trimethylpentyl-2-hydroperoxide, diisopropylbenzene hydroperoxide, cumene peroxide, tert-butyl hydroperoxide, dicumyl peroxide, 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 1, 3-bis (tert-butoxyisopropyl) benzene, n-butylperoxypentanoate dialkyl peroxide, 2,4, 4-trimethylpentylperoxyphenoxy acetate, diisopropyl benzene hydroperoxide, tert-butyl peroxybenzoate, di-tert-butyl peroxytrimethyl adipate, di-3-methoxybutyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate, bis-4-tert-butylcyclohexyl peroxydicarbonate, diisopropyl peroxydicarbonate, acetylcyclohexylsulfonyl peroxide and butyl peroxyaryl carbonate;

the azobis-based compound is one or a combination of several of 1,1 '-azobiscyclohexane-1-carbonitrile, 2,2' -azobis (2, 4-dimethylvaleronitrile), 2,2 '-azobis (methyl isobutyrate), 2,2' -azobis (4-methoxy-2, 4-dimethylvaleronitrile), alpha '-azobis (isobutyronitrile) and 4,4' -azobis (4-cyanovaleric acid).

Adopt above-mentioned technical scheme's beneficial effect: with the above-mentioned initiator and within the amount range of the initiator defined in the present invention, curing can sufficiently occur during exposure in the film forming process to obtain excellent reliability.

More preferably, the photosensitizer is one or a combination of several of tetraethylene glycol bis-3-mercaptopropionate, pentaerythritol tetra-3-mercaptopropionate and dipentaerythritol tetra-3-mercaptopropionate.

Adopt above-mentioned technical scheme's beneficial effect: the initiator is used together with a photosensitizer which causes a chemical reaction by absorbing light and then exciting light to transmit its energy, and can prevent the problem of a decrease in transmittance due to an unreacted initiator.

The invention also provides a preparation method of the ink composition, which comprises the following steps:

(1) weighing the raw materials according to the weight percentage of the ink composition for later use;

(2) and (3) uniformly stirring and mixing the compound for the packaging film, the photoinitiator and the acrylic monomer in vacuum, and filtering to obtain the ink composition.

Preferably, in the step (2), the vacuum stirring temperature is 40-60 ℃ and the time is 80-100 h.

The invention also provides a film packaging structure, which is formed by alternately laminating the inorganic layer and the organic layer for more than 1 time, wherein the outermost layer is the inorganic layer;

wherein the material of the organic layer is an ink composition;

the material of the inorganic layer is selected from any one or combination of several of silicon nitride, silicon oxynitride, silicon oxide, aluminum oxide, zirconium oxide, titanium oxide and zinc oxide.

Preferably, the thickness of the thin film encapsulation structure is 0.3-20 μm.

According to the technical scheme, compared with the prior art, the ink composition prepared by the invention is prepared from the silicon-containing monomer (the compound for packaging the film in the invention), the acrylic monomer and the photoinitiator, and the silicon-containing monomer contains the aromatic ring and the Si atom of the rigid group in the molecular structure, so that the ink composition has better heat resistance, transparency and lower water vapor transmission rate and oxygen transmission rate compared with the ink composition without benzene ring and silicon atom, and on the other hand, the excessive shrinkage volume generated by the organic ink composition during curing is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The preparation method of the film packaging structure comprises the following steps:

step S1: treatment of organic layer materials

Wherein the compound for the encapsulation film (chemical formula 001), the acrylic monomer (2- ((naphthalene-2-yloxy) methoxy) ethyl (meth) acrylic acid), and the photoinitiator (2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one);

weighing 25g of 001, 70g of 2- ((naphthalene-2-yloxy) methoxy) ethyl (meth) acrylic acid and 5g of 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one, mixing together, stirring for 80h at 50 ℃ under vacuum, then filtering with a syringe filter, detecting with a particle counter, and obtaining an organic layer material when the number of particles with a particle size of more than 0.5 [ mu ] m is not more than 50;

step S2: preparation of the inorganic layer

Selecting silicon nitride as an inorganic layer material, and coating the inorganic layer material on the surface of an object to be packaged by a CVD method to form an inorganic layer;

step S3: preparation of organic layer

Spraying the organic layer material onto the surface of the inorganic layer with an ink jet printer to form an organic layer, and spraying with 100mW/cm²Ultraviolet light irradiation for 10 seconds each time causes the organic layer to harden;

step S4: formation of thin film encapsulation structure

And depositing and coating the surface of the object to be packaged into a structure consisting of a plurality of inorganic layers and organic layers according to the alternating form of the inorganic layers and the organic layers, ensuring that the outermost layer is the inorganic layer, and finally, obtaining the thin film packaging structure as the structure in which the inorganic layers and the organic layers deposited and coated on the surface of the object to be packaged are alternately stacked.

Example 2:

a method for preparing a thin film encapsulation structure, which is different from example 1 in that 25g of the compound for encapsulation thin film (chemical formula 002), 70g of the acrylic monomer (10-phenoxydecyl (meth) acrylic acid), 5g of the photoinitiator (2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one);

example 3:

the method for manufacturing the thin film encapsulation structure is different from that of the embodiment 1,

among them, 25g of the compound for a packaging film (chemical formula 003), 70g of an acrylic monomer (2- ((phenylthio) methoxy) ethyl (meth) acrylic acid), 5g of a photoinitiator (2-hydroxy-2-methylacetophenone);

example 4

A method for preparing a thin film encapsulation structure, which is different from example 1 in 30g of formula 001, 60g of 2- ((naphthalen-2-yloxy) methoxy) ethyl (meth) acrylic acid, and 5g of 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one.

Example 5

A method for preparing a thin film encapsulation structure, which is different from example 2, includes 30g of 10-phenoxydecyl (meth) acrylic acid of formula 002, 60g of 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one.

Example 6:

a method for preparing a thin film encapsulation structure, which is different from example 3 in 30g of 003 of chemical formula, 60g of 2- ((phenylthio) methoxy) ethyl (meth) acrylic acid, and 5g of 2-hydroxy-2-methylacetophenone.

Comparative example 1

An ink composition was different from example 1 in that 0g of the compound for an encapsulating film, 98g of the mass fraction of the acrylic monomer 2- ((naphthalen-2-yloxy) methoxy) ethyl (meth) acrylic acid and 2g of the mass fraction of the photoinitiator 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one were changed to each other.

Performance test experiment

The water vapor transmission rate of the film packaging structures of examples 1 to 6 and comparative example 1 was measured by a measuring instrument: the manufacturer is a high-precision water vapor transmission rate tester with model number of AQUARAN2, manufactured by MOCON corporation (American Membrane health corporation); detection conditions are as follows: the temperature is 85 ℃, and the relative humidity is 85%; detection duration: 24 hours;

the light transmittance was measured for the thin film encapsulation structures of examples 1 to 6 and comparative example 1, and the measurement instrument: a light transmittance tester; detection conditions are as follows: the temperature is 40 ℃, and the relative humidity is 85 percent;

the results of the performance tests are shown in table 1 below:

table 1 performance test structures of thin film encapsulation structures of examples 1 to 6 and comparative example 1

Group of	Water vapor transmission rate (g/m)2·d)	Light transmittance (%)
			Example 1	4.5*10-4	86
Example 2	4.1*10-4	85
			Example 3	4.6*10-4	86
Example 4	4.8*10-4	87
			Example 5	4.1*10-4	85
Example 6	4.3*10-4	85
			Comparative example 1	9.0*10-3	86

As can be seen from table 1, the water vapor transmission rate of the film packaging structure after the silicon-containing monomer (compound for packaging film) is added is significantly reduced compared with the water vapor transmission rate of the film packaging structure without the silicon-containing monomer (compound for packaging film) added; the organic light-emitting device is packaged by the packaging film, so that moisture can be effectively isolated, and the service life of the organic light-emitting device is prolonged.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.