Single-component high-adhesion lens hardening liquid and preparation method thereof
A high-adhesion and hardening liquid technology, applied in the field of lenses, can solve the problem of inability to harden various substrates, and achieve the effects of improving wear resistance, saving production costs, and improving adhesion
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[0037] The implementation of the present invention also provides the above-mentioned preparation method of lens hardening solution, comprising the following steps:
[0038]Dissolving the alkoxysilane and the adhesion-promoting resin in part of the solvent, adding the nano-silica colloid solution and the catalyst, and performing a hydrolysis and polycondensation reaction to obtain a reactant;
[0039] The reactants are cooled and the remainder of the solvent and the additive are added while cooling, and mixed to obtain the lens hardening liquid.
[0040] Further, after adding the remaining solvent and mixing with the additive, a filtering step is also performed. When filtering, use a 1-5μm precision filter for filtration, which can remove large particles and avoid cracking and shedding of the hardened layer.
[0041] Further, in order to better promote the reaction, the solvent is selected from an alcohol-based solvent and an ether-based solvent with a mass ratio of 3-5:1. Th...
Embodiment 1
[0050] The present embodiment provides an adhesion promoting resin, which is prepared according to the following steps:
[0051] Add 100 parts of propylene glycol methyl ether into a 500ml three-necked flask and raise the temperature to 80°C, and slowly dropwise add 10 parts of γ-methacryloyloxypropyl trimethoxysilane, 30 parts of methyl methacrylate, 60 parts of tetramethyl methacrylate A solution composed of hydrogen furfuryl ester and 0.5 part of azobisisobutyronitrile was reacted for 6 hours to obtain an adhesion promoting resin.
Embodiment 2
[0053] The present embodiment provides a one-component high-adhesion lens hardening solution, which is prepared according to the following steps:
[0054] 150 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, 30 parts of adhesion promoting resin (made in Example 1), and 200 parts of ethanol were added into a 500ml three-necked flask, and 70 parts of ethanol were added under stirring conditions. Parts of silica sol with a solid content of 30% and 10 parts of acetic acid, heated to 65 °C for 30 min, then heated to 80 °C, maintained for 2 h, cooled while adding 50 parts of ethylene glycol butyl ether, stirred for 1 h, and added 0.5 part of tetramethyl ether Base ammonium hydroxide and 0.2 part of BYK-333, stirred for 4 hours, filtered with a 1 μm precision filter, and the lens hardening solution was obtained.
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