LOCA (Liquid Optical Clear Adhesive) and preparation method thereof
An optically transparent and adhesive technology, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of insufficient elasticity and hardness, poor yellowing resistance, and high optical radiation energy, to prevent Free radical polymerization, effect of good photocuring properties
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[0075] Example 1
[0076] S1. Add 0.4 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) to 40 parts of AS-1 with a viscosity of 20000 cps and 60 parts of AS-2 with a viscosity of 3000 cps, and heat at 600Pa, 120°C and Dehydrate under vacuum for 2h;
[0077] S2. After cooling to room temperature, add 4 parts of methyltrimethoxysilane to the above-mentioned base polymer, and continue stirring for 30 minutes under vacuum;
[0078] S3. Add 0.4 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 0.15 parts of dibutyltin dilaurate to the above base polymer together, and continue to stir for 0.5h under vacuum Make it mix well;
[0079] S4. The product is a liquid optically transparent adhesive after being sealed and stored under vacuum.
Example Embodiment
[0080] Example 2
[0081] S1. Add 0.5 parts of p-methoxyphenol to 100 parts of AS-2 with a viscosity of 3000cps and 60 parts of methyldimethoxy-terminated polydimethylsiloxane with a viscosity of 30000cps, and heat at 600pa, 120℃ and Dehydrate under vacuum for 2h;
[0082] S2. After cooling to room temperature, add 8 parts of methyltrimethoxysilane to the above-mentioned base polymer, and continue to stir for 50 minutes under vacuum;
[0083] S3. Add 0.5 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone and 0.2 parts of diisopropoxy bis(ethyl acetoacetate) titanium to the above base polymer, and add Continue to stir for 0.5h under vacuum to fully mix;
[0084] S4. The product is a liquid optically transparent adhesive after being sealed and stored under vacuum.
Example Embodiment
[0085] Example 3
[0086] S1. Add 0.5 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) to 100 parts of AS-2 synthesized in Example 1, 40 parts of hydroxy-terminated polydimethylsiloxane with a viscosity of 30000cps And 10 parts of methyl MQ resin ({(CH 3 ) 3 SiO 1 / 2 } 0.44 (SiO 4 / 2 ) 0.56 ), and dehydrated for 2h under 600Pa, 120℃ and vacuum conditions;
[0087] S2. After cooling to room temperature, add 9 parts of methyltrimethoxysilane to the base gum, and continue to stir for 60 minutes under vacuum;
[0088] S3. Add 0.5 parts of 1-hydroxycyclohexyl benzophenone and 0.2 parts of stannous octoate to the above-mentioned base polymer together, and continue to stir for 0.5 hours to fully mix under vacuum;
[0089] S4. The product is a liquid optically transparent adhesive after being sealed and stored under vacuum.
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