1. The double-component organic silicon structural adhesive comprises an A component and a B component which are independently subpackaged, wherein the A component comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil, 1-5 parts of hydrogen-containing silicone oil, 1-10 parts of tackifier and 0.1-3 parts of inhibitor; the component B comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil and 1-5 parts of platinum catalyst; the mass ratio of the component A to the component B is 1 (0.5-2).

2. The two-component silicone structural adhesive according to claim 1, wherein the component a comprises the following components in parts by weight: 15-30 parts of vinyl silicone oil, 2-4 parts of hydrogen-containing silicone oil, 3-8 parts of tackifier and 0.5-2 parts of inhibitor; the component B comprises the following components in parts by weight: 15-30 parts of vinyl silicone oil and 1-3 parts of platinum catalyst.

3. The two-component silicone structural adhesive according to claim 1 or 2, wherein the vinyl silicone oil in the component A and the component B independently has a viscosity of 1000 to 10000 cp.

4. The two-component silicone structural adhesive according to claim 1 or 2, wherein the mass fraction of vinyl groups in the vinyl silicone oil in the component A and the component B is independently 0.1 to 5%.

5. The two-component silicone structural adhesive according to claim 1 or 2, wherein the mass fraction of active hydrogen in the hydrogen-containing silicone oil in the component a is 0.1-2%.

6. The two-component silicone-based structural adhesive of claim 1 or 2, wherein the inhibitor in component a comprises 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol, or 3, 5-dimethyl-1-hexyn-3-ol.

7. The two-component silicone structural adhesive of claim 1 or 2, wherein the tackifier of component a is prepared from tetramethylcyclotetrasiloxane, allyl glycidyl ester, and vinyltrimethoxysilane.

8. The two-component silicone structural adhesive according to claim 7, wherein the mass ratio of tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane is 100 (20-70) to (30-80).

9. The use method of the two-component silicone structural adhesive according to any one of claims 1 to 8, comprising: and mixing the component A and the component B, defoaming and curing.

10. The use method of the two-component silicone structural adhesive according to claim 9, wherein the curing temperature is 100 to 180 ℃, and the curing time is 30 to 60 min.

Background

The structural adhesive is widely applied in various fields due to simple and convenient construction process, can be used for bonding of the same material or different materials such as metal, ceramic, plastic, rubber, wood and the like, and is mainly used for reinforcing, anchoring, bonding, repairing and the like of the materials.

The structural adhesives commonly used in the prior art mainly comprise epoxy resin adhesives, polyurethanes, organic silicon adhesives and the like. The organic silicon structural adhesive has good ageing resistance, weather resistance, high and low temperature resistance and insulating property, but the adhesion force is weak, so that the application of the organic silicon structural adhesive is limited.

Therefore, there is a need for a silicone structural adhesive with excellent adhesive properties.

Disclosure of Invention

The invention aims to provide a two-component organic silicon structural adhesive and a using method thereof. The structural adhesive provided by the invention has excellent bonding performance.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a two-component organic silicon structural adhesive which comprises a component A and a component B which are independently subpackaged, wherein the component A comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil, 1-5 parts of hydrogen-containing silicone oil, 1-10 parts of tackifier and 0.1-3 parts of inhibitor; the component B comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil and 1-5 parts of platinum catalyst; the mass ratio of the component A to the component B is 1 (0.5-2).

Preferably, the component A comprises the following components in parts by weight: 15-30 parts of vinyl silicone oil, 2-4 parts of hydrogen-containing silicone oil, 3-8 parts of tackifier and 0.5-2 parts of inhibitor; the component B comprises the following components in parts by weight: 15-30 parts of vinyl silicone oil and 1-3 parts of platinum catalyst.

Preferably, the viscosity of the vinyl silicone oil in the component A and the component B is independently 1000-10000 cp.

Preferably, the mass fraction of vinyl in the vinyl silicone oil in the component A and the component B is independently 0.1-5%.

Preferably, the mass fraction of active hydrogen of the hydrogen-containing silicone oil in the component A is 0.1-2%.

Preferably, the inhibitor in the a-component comprises 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol or 3, 5-dimethyl-1-hexyn-3-ol.

Preferably, the adhesion promoter in the A component is prepared from tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyltrimethoxysilane.

Preferably, the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100 (20-70) to 30-80.

The invention also provides a use method of the two-component organic silicon structural adhesive in the technical scheme, which comprises the following steps: and mixing the component A and the component B, defoaming and curing.

Preferably, the curing temperature is 100-180 ℃, and the curing time is 30-60 min.

The invention provides a two-component organic silicon structural adhesive which comprises a component A and a component B which are independently subpackaged, wherein the component A comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil, 1-5 parts of hydrogen-containing silicone oil, 1-10 parts of tackifier and 0.1-3 parts of inhibitor; the component B comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil and 1-5 parts of platinum catalyst; the mass ratio of the component A to the component B is 1 (0.5-2). According to the invention, the structural adhesive is divided into A, B two components, when the two components are mixed, the platinum catalyst catalyzes vinyl silicone oil and hydrogen-containing silicone oil to perform a crosslinking reaction, the tackifier is added to increase the bonding property of the vinyl silicone oil and the hydrogen-containing silicone oil, the dosage of each component is controlled, and the components act together to improve the adhesive capacity to a base material. The results of the examples show that the tear strength of the structural adhesive provided by the invention is 22N/mm.

Detailed Description

The invention provides a two-component organic silicon structural adhesive which comprises a component A and a component B which are independently subpackaged, wherein the component A comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil, 1-5 parts of hydrogen-containing silicone oil, 1-10 parts of tackifier and 0.1-3 parts of inhibitor; the component B comprises the following components in parts by weight: 10-35 parts of vinyl silicone oil and 1-5 parts of platinum catalyst; the mass ratio of the component A to the component B is 1 (0.5-2).

In the present invention, the sources of the components are not particularly limited, unless otherwise specified, and commercially available products known to those skilled in the art may be used.

The double-component organic silicon structural adhesive provided by the invention comprises a component A and a component B which are independently and separately packaged.

In the invention, the component A comprises 10-35 parts by weight of vinyl silicone oil, preferably 15-30 parts by weight of vinyl silicone oil, and more preferably 20-25 parts by weight of vinyl silicone oil. The invention controls the dosage of the vinyl silicone oil in the component A within the range, can adjust the structure of the product and further improves the bonding strength of the product.

In the invention, the viscosity of the vinyl silicone oil in the component A is preferably 1000-1000 cp, more preferably 2000-8000 cp, more preferably 3000-6000 cp, and most preferably 4000-5000 cp. The viscosity of the vinyl silicone oil in the component A is limited within the range, so that the component A has proper viscosity, the reaction with the component B is facilitated, and the product performance is further improved.

In the invention, the mass fraction of vinyl in the vinyl silicone oil in the component A is preferably 0.1-5%, more preferably 0.5-4%, more preferably 1-3%, and most preferably 1.5-2%. According to the invention, the mass fraction of vinyl in the vinyl silicone oil in the component A is limited within the above range, so that the product has relatively proper crosslinking density, the mechanical properties such as hardness and tear strength of the product are improved, and the adhesive property is improved.

In the invention, the component A comprises 1-5 parts of hydrogen-containing silicone oil, preferably 1.5-4.5 parts, more preferably 2-4 parts, more preferably 2.5-3.5 parts, and most preferably 3 parts by mass of vinyl silicone oil in the component A. The invention limits the dosage of the hydrogen-containing silicone oil in the component A within the range, so that the hydrogen-containing silicone oil can better generate crosslinking reaction with the vinyl silicone oil, the crosslinking density is improved, and the product performance is further improved.

In the invention, the mass fraction of active hydrogen in the hydrogen-containing silicone oil in the component A is preferably 0.1-2%, more preferably 0.5-1.5%, and most preferably 1.0%. According to the invention, the mass fraction of active hydrogen of the hydrogen-containing silicone oil in the component A is limited within the range, so that the crosslinking reaction can be more fully carried out.

In the invention, the component A comprises 1-10 parts of tackifier, preferably 2-9 parts, more preferably 3-8 parts, more preferably 4-7 parts, and most preferably 5-6 parts by mass of vinyl silicone oil in the component A. The invention limits the dosage of the tackifier in the component A to the range, and can further increase the adhesive property of the product.

In the present invention, the tackifier is preferably prepared from tetramethylcyclotetrasiloxane, allyl glycidyl ester, and vinyltrimethoxysilane.

In the invention, the mass ratio of the tetramethylcyclotetrasiloxane, the allyl glycidyl ester and the vinyl trimethoxy silane is preferably 100 (20-70): 30-80), more preferably 100 (30-60): 40-70, and even more preferably 100 (40-50): 50-60. The invention limits the mass ratio of the tetramethylcyclotetrasiloxane, the allyl glycidyl ester and the vinyl trimethoxy silane in the range, can adjust the structure of the tackifier and further increases the adhesive property of the product.

In the present invention, the preparation method of the tackifier is preferably: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane, reacting for 1-3 h at 20-40 ℃, reacting for 1-3 h at 40-80 ℃, and distilling under reduced pressure to obtain the tackifier. In the invention, in the reaction process, tetramethylcyclotetrasiloxane and allyl glycidyl ester and vinyltrimethoxysilane are subjected to addition reaction.

In the invention, the temperature of the reduced pressure distillation is preferably 20-60 ℃, and more preferably 30-50 ℃; the pressure of the reduced pressure distillation is preferably-0.1 to-0.5 MPa, more preferably-0.2 to-0.4 MPa, and most preferably-0.3 MPa. The invention limits the temperature and pressure of reduced pressure distillation in the above range, can completely distill unreacted substances, and improves the purity of the tackifier.

In the invention, the component A comprises 0.1-3 parts of inhibitor, preferably 0.5-2.5 parts, and more preferably 1-2 parts by mass of vinyl silicone oil in the component A. The invention limits the dosage of the inhibitor in the component A within the range, can adjust the crosslinking time and the crosslinking temperature of the product and increase the operation time.

In the present invention, the inhibitor in the a component preferably comprises 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol or 3, 5-dimethyl-1-hexyn-3-ol.

In the invention, the component B comprises 10-35 parts by weight of vinyl silicone oil, preferably 15-30 parts by weight, and more preferably 20-25 parts by weight. According to the invention, the amount of the vinyl silicone oil in the component B is controlled within the range, so that the structure of the product can be adjusted, and the bonding strength of the product is further improved.

In the invention, the viscosity of the vinyl silicone oil in the component B is preferably 1000-1000 cp, more preferably 2000-8000 cp, more preferably 3000-6000 cp, and most preferably 4000-5000 cp. The invention limits the viscosity of the vinyl silicone oil in the component B within the range, can enable the component B to have more appropriate viscosity, is favorable for reaction with the component A, and further improves the product performance.

In the invention, the mass fraction of vinyl in the vinyl silicone oil in the component B is preferably 0.1-5%, more preferably 0.5-4%, more preferably 1-3%, and most preferably 1.5-2%. According to the invention, the mass fraction of vinyl in the vinyl silicone oil in the component B is limited within the above range, so that the product has relatively proper crosslinking density, the hardness and the tearing strength of the product are improved, and the bonding performance is improved.

In the invention, the component B comprises 1-5 parts, preferably 2-4 parts and more preferably 3 parts of platinum catalyst by weight of 10-35 parts of vinyl silicone oil in the component B. According to the invention, the dosage of the platinum catalyst in the component B is limited within the range, so that the vinyl silicone oil and the hydrogen-containing silicone oil can be better catalyzed to perform a crosslinking reaction, and the product performance is further improved.

In the invention, the mass ratio of the component A to the component B is 1 (0.5-2), and preferably 1 (1-1.5). According to the invention, the mass ratio of the component A to the component B is limited in the range, so that the product has proper crosslinking density, and the performance of the product is further improved.

According to the invention, the structural adhesive is divided into A, B two components, when the two components are mixed, the platinum catalyst catalyzes vinyl silicone oil and hydrogen-containing silicone oil to perform a crosslinking reaction, the tackifier is added to increase the bonding property of the vinyl silicone oil and the hydrogen-containing silicone oil, the types and the use amounts of the components are controlled, and the components act together to improve the adhesive capacity to a base material.

The preparation method of the two-component organic silicon structural adhesive is not specially limited, and two components can be respectively obtained by adopting a technical scheme of material mixing which is well known to a person skilled in the art. In the invention, the preparation method of the two-component organic silicon structural adhesive is preferably as follows: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; and mixing the vinyl silicone oil and the platinum catalyst to obtain a component B. The operation of mixing the component A and the component B is not particularly limited in the invention, and the technical scheme of material mixing which is well known to those skilled in the art can be adopted.

The invention also provides a use method of the two-component organic silicon structural adhesive in the technical scheme, which comprises the following steps: and mixing the component A and the component B, defoaming and curing.

In the present invention, the defoaming is preferably vacuum defoaming. The invention has no special limit on the vacuum degree and time of the vacuum defoaming, and can ensure complete defoaming. In the invention, the curing temperature is preferably 100-180 ℃, more preferably 120-160 ℃, and most preferably 130-150 ℃; the curing time is preferably 30-60 min, and more preferably 40-50 min. The invention limits the curing temperature and time within the range, can ensure that the crosslinking reaction is more fully carried out, and further improves the product performance.

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 double-component organic silicon structural adhesive is composed of a component A and a component B which are independently subpackaged, wherein the component A is composed of the following components in parts by weight: 10 parts of vinyl silicone oil (the viscosity is 5000cp, the mass fraction of vinyl is 2 percent), 1 part of hydrogen-containing silicone oil (the mass fraction of active hydrogen is 1.5 percent), 3 parts of tackifier and 0.5 part of inhibitor (1-ethynyl-1-cyclohexanol); the component B comprises the following components in parts by weight: 10 parts of vinyl silicone oil (the viscosity is 5000cp, and the mass fraction of vinyl is 2%) and 1 part of platinum catalyst; the mass ratio of the component A to the component B is 1: 1;

the preparation method of the tackifier comprises the following steps: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane (the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100:50:50), reacting for 2h at 30 ℃, and then reacting for 2h at 60 ℃, and distilling under reduced pressure at 50 ℃ and under the condition of-0.2 MPa to obtain the tackifier;

the preparation method of the two-component organic silicon structural adhesive comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; and mixing the vinyl silicone oil and the platinum catalyst to obtain a component B.

The using method comprises the following steps: mixing the component A and the component B, defoaming in vacuum, and curing at 150 ℃ for 30 min.

Example 2

The double-component organic silicon structural adhesive is composed of a component A and a component B which are independently subpackaged, wherein the component A is composed of the following components in parts by weight: 15 parts of vinyl silicone oil (the viscosity is 5000cp, the mass fraction of vinyl is 2%), 3 parts of hydrogen-containing silicone oil (the mass fraction of active hydrogen is 1.5%), 5 parts of tackifier and 1 part of inhibitor (1-ethynyl-1-cyclohexanol); the component B comprises the following components in parts by weight: 15 parts of vinyl silicone oil (the viscosity is 5000cp, and the mass fraction of vinyl is 2%) and 3 parts of platinum catalyst; the mass ratio of the component A to the component B is 1: 1;

the preparation method of the tackifier comprises the following steps: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane (the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100:50:50), reacting for 2h at 30 ℃, and then reacting for 2h at 60 ℃, and distilling under reduced pressure at 50 ℃ and under the condition of-0.2 MPa to obtain the tackifier;

the preparation method of the two-component organic silicon structural adhesive comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; mixing vinyl silicone oil and a platinum catalyst to obtain a component B;

the using method comprises the following steps: mixing the component A and the component B, defoaming in vacuum, and curing at 150 ℃ for 30 min.

Example 3

The double-component organic silicon structural adhesive is composed of a component A and a component B which are independently subpackaged, wherein the component A is composed of the following components in parts by weight: 20 parts of vinyl silicone oil (the viscosity is 5000cp, the mass fraction of vinyl is 2%), 5 parts of hydrogen-containing silicone oil (the mass fraction of active hydrogen is 1.5%), 7 parts of tackifier and 1 part of inhibitor (1-ethynyl-1-cyclohexanol); the component B comprises the following components in parts by weight: 20 parts of vinyl silicone oil (the viscosity is 5000cp, and the mass fraction of vinyl is 2%) and 3 parts of platinum catalyst; the mass ratio of the component A to the component B is 1: 1;

the preparation method of the tackifier comprises the following steps: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane (the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100:50:50), reacting for 2h at 30 ℃, and then reacting for 2h at 60 ℃, and distilling under reduced pressure at 50 ℃ and under the condition of-0.2 MPa to obtain the tackifier;

the preparation method of the two-component organic silicon structural adhesive comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; mixing vinyl silicone oil and a platinum catalyst to obtain a component B;

the using method comprises the following steps: mixing the component A and the component B, defoaming in vacuum, and curing at 150 ℃ for 40 min.

Example 4

The double-component organic silicon structural adhesive is composed of a component A and a component B which are independently subpackaged, wherein the component A is composed of the following components in parts by weight: 30 parts of vinyl silicone oil (the viscosity is 5000cp, the mass fraction of vinyl is 2%), 5 parts of hydrogen-containing silicone oil (the mass fraction of active hydrogen is 1.5%), 10 parts of tackifier and 2 parts of inhibitor (1-ethynyl-1-cyclohexanol); the component B comprises the following components in parts by weight: 20 parts of vinyl silicone oil (the viscosity is 5000cp, and the mass fraction of vinyl is 2%) and 3 parts of platinum catalyst; the mass ratio of the component A to the component B is 1: 1;

the preparation method of the tackifier comprises the following steps: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane (the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100:50:50), reacting for 2h at 30 ℃, and then reacting for 2h at 60 ℃, and distilling under reduced pressure at 50 ℃ and under the condition of-0.2 MPa to obtain the tackifier;

the preparation method of the two-component organic silicon structural adhesive comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; mixing vinyl silicone oil and a platinum catalyst to obtain a component B;

the using method comprises the following steps: mixing the component A and the component B, defoaming in vacuum, and curing at 150 ℃ for 40 min.

Example 5

The double-component organic silicon structural adhesive is composed of a component A and a component B which are independently subpackaged, wherein the component A is composed of the following components in parts by weight: 35 parts of vinyl silicone oil (with the viscosity of 5000cp and the mass fraction of vinyl of 2 percent), 5 parts of hydrogen-containing silicone oil (with the mass fraction of active hydrogen of 1.5 percent), 10 parts of tackifier and 2 parts of inhibitor (1-ethynyl-1-cyclohexanol); the component B comprises the following components in parts by weight: 35 parts of vinyl silicone oil (the viscosity is 5000cp, and the mass fraction of vinyl is 2%) and 4 parts of platinum catalyst; the mass ratio of the component A to the component B is 1: 1;

the preparation method of the tackifier comprises the following steps: mixing tetramethylcyclotetrasiloxane, allyl glycidyl ester and vinyl trimethoxy silane (the mass ratio of the tetramethylcyclotetrasiloxane to the allyl glycidyl ester to the vinyl trimethoxy silane is 100:50:50), reacting for 2h at 30 ℃, and then reacting for 2h at 60 ℃, and distilling under reduced pressure at 50 ℃ and under the condition of-0.2 MPa to obtain the tackifier;

the preparation method of the two-component organic silicon structural adhesive comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil, a tackifier and an inhibitor to obtain a component A; mixing vinyl silicone oil and a platinum catalyst to obtain a component B;

the using method comprises the following steps: mixing the component A and the component B, defoaming in vacuum, and curing at 150 ℃ for 60 min.

The performances of the two-component silicone structural adhesives provided in examples 1 to 5 were tested, and the results are shown in table 1.

Table 1 shows the properties of the two-component silicone structural adhesives provided in examples 1 to 5

As can be seen from Table 1, the bicomponent silicone structural adhesive provided by the invention has good tearing strength, excellent bonding property, good mechanical property and wide applicable temperature range.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.