Prime coat liquid for improving bonding strength of silicone rubber and PPSU and preparation method of prime coat liquid
A technology of bonding strength and silicone rubber, which is applied in the direction of surface pretreatment bonding methods, coatings, epoxy resin coatings, etc., can solve the problem of unsuitable substrates with uneven surfaces, expensive plasma treatment equipment, silicone rubber It is difficult to stick to the base material and other problems, and achieves the effect of simple preparation method, easy industrial production, and increased high temperature resistance and water boiling resistance
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[0040] The present invention also provides a kind of preparation method for preparing the above-mentioned bottom coat liquid that improves the bonding strength of silicone rubber and PPSU, comprising the following steps:
[0041]S1, at first, obtain modified silane coupling agent by reaction of polyester polyol, acetone, silane coupling agent, triethylamine;
[0042] S2, secondly, take amount of silane coupling agent, deionized water, methanol, acetic acid, and react to obtain tackifier;
[0043] S3. Finally, a primer for silicone rubber is prepared from a film forming agent, a tackifier, an adhesion promoter, a crosslinking agent, a solvent, and a catalyst.
[0044] 1. Specifically, in step S1, specifically include:
[0045] SA1. Add polyester polyol to the flask, and use an oil pump to evacuate under high temperature environment.
[0046] In this step, the four-necked flask can be selected; the high temperature environment can be selected at 115°C-125°C; the vacuuming time...
Embodiment 1
[0068] This embodiment selects polycarbonate dibasic alcohol, 3-isocyanatopropyltrimethoxysilane, methylphenyldimethoxysilane, vinyltrimethoxysilane, acetone, triethylamine, acetic acid, methanol, Ionized water, acrylic resin, epoxy resin, 4-vinylbiphenyl, butyl titanate, chloroplatinic acid, xylene, cyclohexane, ethyl acetate are used as raw materials.
[0069] (1) Preparation of tackifier
[0070] Add 80g of polycarbonate diol (molecular weight 2000g / mol) into the flask, vacuumize at 120°C for 4h, stop until no bubbles are generated; blow nitrogen and cool down to 80°C, add 40g of acetone and stir; stir evenly Finally, add 16g of 3-isocyanatopropyltrimethoxysilane and 0.1g of triethylamine; after the reaction lasts for 4h, distill under reduced pressure at 90°C to remove unreacted substances and low boiling point substances to obtain polycarbonate diol Modified silane coupling agent A1.
[0071] Take 22g of A1, 36g of methylphenyldimethoxysilane, 38g of vinyltrimethoxysila...
Embodiment 2
[0075] This embodiment selects polycarbonate diol, 3-isocyanatopropyltrimethoxysilane, methylphenyldimethoxysilane, vinyltrimethoxysilane, acetone, triethylamine, methanol, deionized water , acetic acid, acrylic resin, epoxy resin, 4-vinyl biphenyl, butyl titanate, chloroplatinic acid, xylene, cyclohexane, ethylene glycol butyl ether as raw materials.
[0076] (1) Preparation of tackifier
[0077] Add 120g of polycarbonate diol (molecular weight 3000g / mol) into the flask, vacuumize at 120°C for 4h, stop until no bubbles are generated; blow nitrogen and cool down to 80°C, add 60g of acetone and stir; stir evenly Finally, add 16g of 3-isocyanatopropyltrimethoxysilane and 0.14g of triethylamine; after the reaction lasts for 4h, distill under reduced pressure at 90°C to remove unreacted substances and low boiling point substances to obtain polycarbonate diol Modified silane coupling agent A2.
[0078] Take 32g of A2, 36g of methylphenyldimethoxysilane, 38g of vinyltrimethoxysila...
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