Preparation method of interlayer optical material for safety glass
A technology for safety glass and optical materials, applied in the field of preparation of intermediate layer optical materials, can solve the problem of low light transmittance of polyurethane sheets, and achieve the effects of balanced mechanical and optical properties and high tensile strength
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[0030] The preparation method of the interlayer optical material of safety glass of the present invention comprises the following steps: (1) the preparation step of prepolymer component A; (2) the preparation step of chain extender component B; (3) the interlayer optical material preparation steps. A detailed description is given below.
[0031] Preparation steps of prepolymer component A
[0032] Part of polytetrahydrofuran is dehydrated in vacuum, mixed with antioxidant, light stabilizer, 4,4'-dicyclohexylmethane diisocyanate and catalyst after cooling down, and then reacted to obtain prepolymer component A. In certain embodiments, 45 to 53 parts by weight of polytetrahydrofuran are dehydrated in vacuum at 110 to 120°C for 1 to 3 hours, then cooled to 50 to 60°C, and then mixed with 0.8 to 1.5 parts by weight of antioxidant, 0.2 to 2.5 Light stabilizer in parts by weight, 4,4'-dicyclohexylmethane diisocyanate in 20 to 40 parts by weight and catalyst in 0.05 to 0.1 parts b...
Embodiment 1 and comparative example 1
[0061] The raw material formula of the interlayer optical material for preparing safety glass is as follows:
[0062]
[0063]
[0064] According to the above formula, adopt the following method to prepare the interlayer optical material of safety glass:
[0065] (1) 45.3 parts by weight of polytetrahydrofuran were vacuum dehydrated at 110°C for 2 hours, then cooled to 60°C, and IRGANOX 1010, UV123, 4,4'-dicyclohexylmethane diisocyanate and T12 were added according to the proportion, and the temperature was raised with stirring. ℃ for 3 hours to obtain prepolymer component A;
[0066] (2) Dehydrate 15.1 parts by weight of polytetrahydrofuran at 110°C for 2 hours in vacuum, then cool down to 60°C, add small molecular diol (see Table 1) according to the proportion, stir at 60°C to mix evenly, and obtain a chain extender Component B;
[0067] (3) Lower the temperature of prepolymer component A to 70°C, add chain extender component B, and obtain a premix after stirring and...
Embodiment 2 and comparative example 2
[0069] The raw material formula of the interlayer optical material for preparing safety glass is as follows:
[0070]
[0071] According to the above formula, adopt the following method to prepare the interlayer optical material of safety glass:
[0072] (1) 47.775 parts by weight of polytetrahydrofuran were vacuum dehydrated at 110°C for 2 hours, then cooled to 55°C, and IRGANOX 1010, UV123, 4,4'-dicyclohexylmethane diisocyanate and T12 were added according to the proportion, and the temperature was raised with stirring. ℃ for 3 hours to obtain prepolymer component A;
[0073] (2) Vacuum dehydrate 15.925 parts of polytetrahydrofuran at 110-120°C for 2 hours, then cool down to 55°C, add small molecular diol (see Table 1) according to the proportion, stir at 60°C to mix evenly, and obtain expanded Chain agent component B;
[0074] (3) Lower the temperature of prepolymer component A to 65°C, add chain extender component B, and obtain a premix after stirring and defoaming. ...
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