1. The acrylate adhesive is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 60-85 wt% of acrylate monomers, 15-40 wt% of thickening agents, 0.01-3 wt% of stabilizing agents and 0.01-3 wt% of accelerating agents;

the acrylate monomer is a monofunctional monomer, and is methyl methacrylate, ditetrahydrofurfuryl methacrylate, isooctyl methacrylate or lauryl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is one or more of p-methoxyphenol, hydroquinone, 2, 6-di-tert-butyl-p-cresol and EDTA sodium salt; the accelerator is one or more of N, N-dimethylaniline, N-diethylaniline, N-dimethyl-p-toluidine and N, N-dihydroxyethylaniline;

the component B comprises 80-99 wt% of plasticizer and 1-20 wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

2. The acrylate adhesive as claimed in claim 1, wherein the component A further comprises 0.01-1 wt% of an ultraviolet absorbent, the ultraviolet absorbent is a benzotriazole, and the ultraviolet absorbent is one or more of UV-P, UV-234, UV-326, UV-327 and UV-328.

3. The acrylate adhesive according to claim 2, which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.5-2.0 wt% of glycerol and 0.15-0.20 wt% of potassium dihydrogen phosphate;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline; the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

4. The acrylate adhesive according to claim 3, which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol and 0.16wt% of potassium dihydrogen phosphate;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline; the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

5. The acrylate adhesive according to claim 4, which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol, 0.16wt% of monopotassium phosphate, 0.48-0.52 wt% of maleic acid and 0.09-0.11 wt% of ethylenediamine;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline; the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

6. The acrylate adhesive according to claim 5, which comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol, 0.16wt% of monopotassium phosphate, 0.50wt% of maleic acid and 0.10wt% of ethylenediamine;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline; the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

Background

Acrylic, also called PMMA or plexiglass, is known under the chemical name polymethylmethacrylate. Because of its crystal transparency, excellent weather resistance, higher surface hardness and surface gloss and good processability, it has been widely used in many industries, such as show windows, soundproof doors and windows, etc. in the construction industry, light boxes, signboards, display frames, etc. in the advertising industry, surface plates and protective covers, etc. in the industrial instrument industry, fluorescent lamps, ceiling lamps, etc. in the lighting industry, and civil bathroom facilities, aquariums, etc.

The adhesion of an acrylic product is a very key process link in acrylic processing, how to show the characteristics of clear and transparent acrylic, and the grade and taste of the acrylic artware are improved to the maximum extent, and the adhesion technology plays a very important role. The single solvent type adhesive has low strength and is mainly applied to small-area bonding. The reactive adhesive is epoxy adhesive and UV adhesive, which have good strength, but the cured product and the acrylic adhesive have different thermal expansion coefficients, and are easy to crack and degum in cold and heat changes, especially in large-area bonding.

Therefore, the adhesive suitable for large-area bonding of acrylic products has certain production and application values.

Disclosure of Invention

The invention aims to provide an acrylate adhesive which is suitable for large-area bonding of acrylic products.

The technical purpose of the invention is realized by the following technical scheme:

the acrylate adhesive comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 60-85 wt% of acrylate monomers, 15-40 wt% of thickening agents, 0.01-3 wt% of stabilizing agents and 0.01-3 wt% of accelerating agents;

the acrylate monomer is a monofunctional monomer, and is methyl methacrylate, ditetrahydrofurfuryl methacrylate, isooctyl methacrylate or lauryl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is one or more of p-methoxyphenol, hydroquinone, 2, 6-di-tert-butyl-p-cresol and EDTA sodium salt; the accelerator is one or more of N, N-dimethylaniline, N-diethylaniline, N-dimethyl-p-toluidine and N, N-dihydroxyethylaniline;

the component B comprises 80-99 wt% of plasticizer and 1-20 wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

The double-main-agent SGA (second generation acrylate adhesive) is adopted, the component A and the component B can be respectively coated on the surfaces of two adherends during bonding, and can be solidified after being superposed, or A, B can be mixed and then glued and bonded. Compared with other adhesives, the adhesive has the advantages of rapid curing at room temperature, no strict treatment on the surface of a base material and high bonding strength. By adopting the technical scheme, the working life of the adhesive is prolonged, the large-area long-time gluing operation is facilitated, the bonding strength is obviously increased, the possibility of degumming is greatly reduced due to the fact that the thermal expansion of the adhesive is close to that of acrylic, and the adhesive is suitable for large-area bonding of acrylic products.

Further, the component A also comprises 0.01-1 wt% of an ultraviolet absorbent, the ultraviolet absorbent is benzotriazole, and the ultraviolet absorbent is one or more of UV-P, UV-234, UV-326, UV-327 and UV-328.

By adopting the technical scheme, the light stability is improved, and the influence on the performances of the product such as the bonding strength, the working life and the like can be ignored.

Further, the paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.5-2.0 wt% of glycerol and 0.15-0.20 wt% of potassium dihydrogen phosphate;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline;

the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

By adopting the technical scheme, the working life of the adhesive is further prolonged, and large-area long-time gluing operation is facilitated.

Further, the paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol and 0.16wt% of potassium dihydrogen phosphate;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline;

the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

Further, the paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol, 0.16wt% of monopotassium phosphate, 0.48-0.52 wt% of maleic acid and 0.09-0.11 wt% of ethylenediamine;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline;

the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

By adopting the technical scheme, the possibility of reducing the shearing strength is reduced while the working life is prolonged.

Further, the paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1;

the component A comprises 75wt% of acrylate monomers, 15-40 wt% of thickening agents, 1.0wt% of stabilizing agents, 1.0wt% of accelerators, 0.10wt% of ultraviolet absorbers, 1.6wt% of glycerol, 0.16wt% of monopotassium phosphate, 0.50wt% of maleic acid and 0.10wt% of ethylenediamine;

the acrylate monomer is a monofunctional monomer, and the acrylate monomer is methyl methacrylate; the thickening agent is polymethyl methacrylate; the stabilizer is p-methoxyphenol; the accelerator is N, N-dimethylaniline;

the ultraviolet absorbent is UV-P;

the component B comprises 95wt% of plasticizer and 5wt% of initiator;

the plasticizer is selected from phthalic acid esters; the initiator is benzoyl peroxide.

The technical effects of the invention are mainly reflected in the following aspects: the pot life of the adhesive is prolonged, the large-area long-time gluing operation is facilitated, the bonding strength is obviously increased, the possibility of degumming is greatly reduced due to the fact that the adhesive is close to acrylic in thermal expansion, and the adhesive is suitable for large-area bonding of acrylic products; the heat resistance is high.

Detailed Description

Examples 1 to 7: the acrylate adhesive comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 20: 1.

The formulation of component A is shown in Table 1. The preparation method of the component A comprises the following steps: mixing the acrylate monomer and the thickening agent according to the formula amount, stirring and dispersing uniformly, adding the stabilizer, the accelerator, the ultraviolet absorber and other formula components according to the formula amount, stirring and dispersing uniformly, and degassing bubbles.

The component B comprises 95 weight percent of plasticizer and 5 weight percent of initiator; the plasticizer is selected from phthalate; the initiator is benzoyl peroxide. The preparation method of the component B comprises the following steps: and (3) uniformly stirring and dispersing the plasticizer according to the formula amount, adding the initiator according to the formula amount, uniformly stirring and dispersing, and degassing bubbles.

TABLE 1 information on the formulation of component A of examples 1 to 7 (unit: parts by mass)

And (3) performance testing:

the pot life is tested according to GB/T7123.1-7123.2-2002, the shear strength is tested according to GB/T7124-2008, and the peel strength is tested according to the GJB446-1998 adhesive 90-degree peel strength test method (metal and metal).

TABLE 2 pot life and Effect of pot life on shear Strength

Table 2 shows that the pot lives of examples 1 to 7 are not less than 20min and are long; the shear strengths of examples 1-7 did not change significantly over the pot life, indicating that the adhesive performance was stable over the pot life. Compared with example 1, the working life of examples 2-7 is better prolonged, and the method is more suitable for large-area and long-time use.

TABLE 3 Heat resistance test (shear strength at different temperatures, unit: MPa)

	23℃	60℃	80℃	100℃
					Example 1	30.53	19.02	13.23	9.10
Example 4	30.93	16.21	11.03	6.01
					Example 5	31.25	20.54	14.21	11.06
Example 6	31.25	20.39	14.30	11.03
					Example 7	31.85	21.26	15.02	11.96

Table 3 shows that examples 1-7 have higher shear strengths at room temperature of greater than 30 MPa; example 1 has better heat resistance, the shear property at 100 ℃ is more than 9MPa, the shear property at 100 ℃ of example 4 is 6MPa, which is lower than that of example 1, mainly because the working life of example 4 is longer, the curing crosslinking degree is lower, and examples 5-7 have more advantages in that the working life and the shear strength are increased on the basis of example 4.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.