A kind of hydrolysis-resistant polyurethane composite material and preparation method thereof
A composite material and polyurethane technology, applied in the field of seal materials, can solve the problems of poor hydrolysis resistance, affecting the service life, accelerating the hydrolysis process, etc., to achieve excellent hydrolysis resistance, avoiding the impact, and reducing the effect of harm.
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Embodiment 1
[0021] Add 40 parts of phenylethylamine, 70 parts of polytetramethylene ether glycol, 1 part of antioxidant 245, 1 part of antioxidant 264, 1 part of calcium carbonate, 1 part of silica lime powder and 1 part For alkylene carbonate, vacuum dehydrate at 100°C for 3 hours, cool down to 50°C, add 50 parts of toluene diisocyanate, heat up to 80°C for 2 hours, then heat up, under the condition that the distillation temperature is 140°C and the system pressure is less than 10pa , so that the prepolymer and unreacted toluene diisocyanate in the system are separated to obtain a low-free prepolymer. The prepolymer is heated to 80 ° C, and 10 parts of di-o-chlorodianiline methane and 20 parts of 1,4-butane are added Diol, stirred quickly and evenly, poured into a preheated mold coated with a release agent, vulcanized in an oven at 90°C for 25 hours, and left for 6 days to obtain a hydrolysis-resistant polyurethane composite material.
[0022] The obtained material was subjected to a per...
Embodiment 2
[0024] Add 60 parts of phenylethylamine, 50 parts of polytetramethylene ether glycol, 0.5 part of antioxidant 264, 0.5 part of antioxidant 1330, 2.5 parts of talcum powder, 2.5 parts of mica powder and 0.5 part of sub Alkyl carbonate, vacuum dehydration at 120°C for 2 hours, lower the temperature to 60°C, add 30 parts of toluene diisocyanate, raise the temperature to 100°C for 1 hour, then raise the temperature, under the condition that the distillation temperature is 170°C and the system pressure is less than 10pa, Separate the prepolymer and unreacted toluene diisocyanate in the system to obtain a low-free prepolymer, heat the prepolymer to 100°C, add 20 parts of di-o-chlorodiphenylamine methane and 10 parts of 1,4-butanedi Alcohol, stir quickly and evenly, pour it into a preheated mold coated with a release agent, vulcanize in an oven at 110 °C for 15 hours, and place it for 9 days to obtain a hydrolysis-resistant polyurethane composite material.
[0025] The obtained mater...
Embodiment 3
[0027] Add 50 parts of phenylethylamine, 60 parts of polytetramethylene ether glycol, 1.5 parts of antioxidant 245, 3.5 parts of talcum powder and 0.7 parts of alkylene carbonate into the reaction kettle, and vacuum dehydrate at 110 °C for 2.5 h, lower the temperature to 55°C, add 40 parts of toluene diisocyanate, raise the temperature to 90°C for 1.5h, then raise the temperature, under the condition that the distillation temperature is 160°C and the system pressure is less than 10pa, the prepolymer and unreacted Separation of toluene diisocyanate to obtain a low-free prepolymer, heat the prepolymer to 90 ° C, add 15 parts of di-o-chlorodianiline methane and 15 parts of 1,4-butanediol, stir quickly and evenly, pour into the preheated In a mold coated with a release agent, vulcanize in an oven at 100°C for 20 hours, and place it for 7 days to obtain a hydrolysis-resistant polyurethane composite material.
[0028] The obtained material was subjected to a performance test, wherei...
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