A highly-wear-resistant thermoplastic polyurethane elastomer and a preparing method thereof
A thermoplastic polyurethane and elastomer technology, applied in the field of polyurethane, can solve problems such as affecting product processing, long injection molding cycle of polyurethane elastomer, affecting product use, etc.
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specific Embodiment 1
[0022] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:15, add 5‰ silicone oil, and stir thoroughly at 80-90°C for 0.5 -1 hour to obtain a mixture of polyester diol and 1,4-butanediol. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:
[0023]
[0024] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.
[0025] Add 50% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.06‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging for 60 hours at 80°C, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.
[0026] Mix polyurethane elastomer with 4‰ of silicone masterbatch, ...
specific Embodiment 2
[0027] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:40, add 5‰ silicone oil, and stir thoroughly at 80-90°C for 1 Hours, a mixture of polyester diol and 1,4-butanediol was obtained. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:
[0028]
[0029] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.
[0030] Add 90% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.06‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging at 85°C for 70 hours, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.
[0031] Mix polyurethane elastomer with 5‰ silicone masterbatch, bak...
specific Embodiment 3
[0032] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:30, add 7‰ silicone oil, and stir thoroughly at 80-90°C for 1 Hours, a mixture of polyester diol and 1,4-butanediol was obtained. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:
[0033]
[0034] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.
[0035] Add 70% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.04‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging at 85°C for 70 hours, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.
[0036] Mix polyurethane elastomer with 5‰ silicone masterbatch, bak...
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