Modified acrylate oligomer and UV and moisture dual-curing pressure-sensitive adhesive
An acrylate and urethane acrylate technology, applied in the field of pressure-sensitive adhesives, can solve the problems of low coating film hardness and reduced content, and achieve the effects of excellent performance, improved shear strength, and simple preparation method
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preparation example 1
[0062] S1. Under a nitrogen atmosphere, add 10 parts of acryloyl chloride, 0.01 parts of p-hydroxyanisole, 30 parts of 3-aminopropyltrimethoxysilane, and 60 parts of DMF to the reaction kettle, control the reaction temperature at 50 ° C, drop 6 parts of triethylamine were dropped within 30 minutes, kept at a constant temperature and reacted for 3 hours, and samples were taken to determine the amine groups by ninhydrin colorimetric method. If there was no color change, the reaction was stopped. Finally, DMF and unreacted triethylamine were distilled off under reduced pressure, and the reaction was carried out again. Dissolved in acetone, filtered to remove triethylamine hydrochloride, and then the filtrate was rotary evaporated to remove acetone to obtain a liquid polymerizable siloxane monomer;
[0063] S2. Under a nitrogen atmosphere, add 60 parts of butyl acrylate, 5 parts of styrene, 30 parts of acrylic acid, 60 parts of the polymerizable siloxane monomer obtained above and ...
preparation example 2
[0067] The rest are the same as in Preparation Example 1, except that the amount of butyl acrylate in step S2 is 15 parts, the amount of styrene is 1 part, the amount of acrylic acid is 5 parts, and the amount of polymerizable siloxane monomer is 15 parts .
[0068] A gel chromatography system was used for testing (the sample was dissolved in tetrahydrofuran with a concentration of 5-10 mg / ml), and the Mw was 5470 g / mol.
Embodiment 1
[0075] T1. Bake 8 parts of fumed silica with an average particle size of 120nm for 12 hours to constant weight, and set aside;
[0076] T2. Add the diluent compounded by 20 parts of triethylene glycol diacrylate and 6 parts of hexafluorobutyl acrylate, and 5 parts of photoinitiator to the above-mentioned vacuum centrifugal high-speed disperser, at a speed of 600r / min. Stir for 3 minutes under a vacuum of -0.05MPa until the solid photoinitiator is completely dissolved;
[0077] T3. Add 30 parts of Nippon Gosei Chemical 3000B urethane acrylate and fumed silica with an average particle size of 120nm for use in step S1 into the disperser in step T2, with a rotation speed of 600r / min and a vacuum of -0.05MPa Stir for 6 minutes under the pressure, seal and let stand for 3 hours;
[0078] T4. Add 30 parts of the above-mentioned modified acrylate oligomer into the disperser, continue to stir at a speed of 600r / min at a vacuum of -0.05MPa for 8min, put a needle tube into the centrifug...
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Abstract
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