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Preparation method of anti-migration thermoplastic polyurethane elastomer

A technology of thermoplastic polyurethane and elastomer, which is applied in the field of preparation of anti-migration thermoplastic polyurethane elastomer, can solve the problems of affecting product appearance, reducing the effectiveness of additives, affecting the performance of materials, etc., to extend the retention period of physical properties and the retention period of good physical properties , Improve the effect of microphase separation

Active Publication Date: 2014-08-27
苏州奥斯汀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Anti-migration thermoplastic polyurethane elastomers are mainly used in cable and film-grade thermoplastic polyurethane elastomers (TPU). Currently, film-grade and cable-type TPUs on the market will have frosting on the surface in the later stage, and frosting is actually a small molecule. Migration on the surface of TPU. Most of the migrating substances are various small molecule additives added during the production process. The migration and precipitation of these substances not only affects the appearance of the product, but also leads to a sharp decline in the effectiveness of the additives, affecting the later use of the material. Performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In reactor, add the antioxidant 1010 that accounts for 4‰ of polyester polyol quality, account for the stannous octoate of polyester polyol quality 150ppm, by adipic acid and 1,4-butanediol and 1,3-butanediol Polyester polyol with a number average molecular weight of 2000 formed by the condensation of mixed alcohols, in which the mass ratio of 1,3-butanediol to 1,4-butanediol is 1:7, at a temperature of 95°C and -0.08~ Dehydrate, melt and mix for 5 hours under a vacuum of -0.1MPa, then put it into the metering tank, open the metering tank, stir and evacuate to -0.085MPa, then stop the vacuum and fill with nitrogen to form component A for use;

[0032] Melt diphenylmethane diisocyanate at 43.5°C and pump it into the metering tank with vacuum to form component B for later use;

[0033] Melt 1,4-butanediol at 40°C, pump it into the metering tank with vacuum, and dehydrate it under vacuum at -0.08~-0.1MPa for 4 hours to form component C for later use;

[0034] Components A...

Embodiment 2

[0038] In reactor, add the antioxidant 1010 that accounts for 4‰ of polyester polyol quality, account for the stannous octoate of polyester polyol quality 150ppm, by adipic acid and 1,4-butanediol and 1,3-butanediol Polyester polyol with a number average molecular weight of 2000 formed by the condensation of mixed alcohols, in which the mass ratio of 1,3-butanediol to 1,4-butanediol is 1:7, at a temperature of 95°C and -0.08~ Dehydrate, melt and mix for 5 hours under a vacuum of -0.1MPa, then put it into the metering tank, open the metering tank, stir and evacuate to -0.085MPa, then stop the vacuum and fill with nitrogen to form component A for use;

[0039] Melt diphenylmethane diisocyanate at 43.5°C and pump it into the metering tank with vacuum to form component B for later use;

[0040] Melt 1,4-butanediol at 40°C, pump it into the metering tank with vacuum, and dehydrate it under vacuum at -0.08~-0.1MPa for 4 hours to form component C for later use;

[0041] Components A...

Embodiment 3

[0045] In reactor, add the antioxidant 1010 that accounts for 4‰ of polyester polyol quality, account for the stannous octoate of polyester polyol quality 150ppm, by adipic acid and 1,4-butanediol and 1,3-butanediol Polyester polyol with a number average molecular weight of 2000 formed by the condensation of mixed alcohols, in which the mass ratio of 1,3-butanediol to 1,4-butanediol is 1:9, at a temperature of 95°C and -0.08~ Dehydrate, melt and mix for 5 hours under a vacuum of -0.1MPa, then put it into the metering tank, open the metering tank, stir and evacuate to -0.085MPa, then stop the vacuum and fill with nitrogen to form component A for use;

[0046] Melt diphenylmethane diisocyanate at 43.5°C and pump it into the metering tank with vacuum to form component B for later use;

[0047] Melt 1,4-butanediol at 40°C, pump it into the metering tank with vacuum, and dehydrate it under vacuum at -0.08~-0.1MPa for 4 hours to form component C for later use;

[0048] Components A...

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Abstract

The invention discloses a preparation method of an anti-migration thermoplastic polyurethane elastomer. The preparation method comprises the following steps: (1) adding heated and molten polyester polyol into a reaction kettle, and adding an antioxidant and a catalyst, and dewatering under heating and reduced pressure conditions to form a component A; (2) heating and melting diisocyanate to form a component B; (3) heating and melting a dihydric alcohol chain extending agent, and dewatering under the reduced pressure condition to form a component C; (4) reacting the components A, B and C in a double-screw extruder, and fully and uniformly mixing a reaction product with a macromolecular hindered amine light stabilizer to obtain the anti-migration thermoplastic polyurethane elastomer; (5) curing the anti-migration thermoplastic polyurethane elastomer obtained in the step (4). According to the anti-migration thermoplastic polyurethane elastomer, the smooth surface can be better kept and the physical property retention period can be better prolonged in processed products such as late-period wires and cables and films.

Description

technical field [0001] The invention relates to a preparation method of a thermoplastic polyurethane elastomer, in particular to a preparation method of a migration-resistant thermoplastic polyurethane elastomer. Background technique [0002] Anti-migration thermoplastic polyurethane elastomers are mainly used in cable and film-grade thermoplastic polyurethane elastomers (TPU). Currently, film-grade and cable-type TPUs on the market will have frosting on the surface in the later stage, and frosting is actually a small molecule. Migration on the surface of TPU. Most of the migrating substances are various small molecule additives added during the production process. The migration and precipitation of these substances not only affects the appearance of the product, but also leads to a sharp decline in the effectiveness of the additives, affecting the later use of the material. Performance . Contents of the invention [0003] The technical problem to be solved by the present...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/32C08G18/42
CPCC08G18/4238C08G18/664
Inventor 汪泽恒杨廷廷艾玲陈海风
Owner 苏州奥斯汀新材料科技有限公司
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