Calendaring high-performance thermoplastic polyurethane elastomer and preparation method thereof

A technology of thermoplastic polyurethane and polyurethane elastomer, which is applied in the field of calendering-grade high-performance thermoplastic polyurethane elastomer and its preparation, can solve the problems of strong adhesion between TPU melt and metal, unfavorable rapid and continuous industrial production, and decreased work efficiency. Achieve good processability, good elasticity, and improved anti-sticking performance

Inactive Publication Date: 2016-10-12
DONGGUAN XIONGLIN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TPU can use calender melt processing technology to manufacture TPU film or TPU coating material. CN1408768A discloses a formula and calendering manufacturing method of an all-environmental friendly TPU film. Mixing in a mixer increases the difficulty of preparation for TPU calendering and requires continuous metering of each component in the formula, which is not conducive to rapid and continuous chemical industrial production, will lead to a large loss of additives, and will appear strong between TPU melt and metal. Adhesion, making TPU melt adhere to the surface of the machine, resulting in a decrease in work efficiency, or even malfunction

Method used

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  • Calendaring high-performance thermoplastic polyurethane elastomer and preparation method thereof
  • Calendaring high-performance thermoplastic polyurethane elastomer and preparation method thereof
  • Calendaring high-performance thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, the polyurethane elastomer was prepared from the following raw materials:

[0041]

[0042]Wherein said diisocyanate is the mixture of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate, the mass ratio of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate is 3:1, and described polyhydric alcohol is The mixture of polyether polyol and polyester polyol, the mass ratio of polyether polyol and polyester polyol is 7:1, and the number average molecular weight of polyol is 4000, and described chain extender is ethylene glycol, and described catalyst For stannous octoate.

[0043] The preparation method is as follows:

[0044] (1) Add diisocyanate, polyol, chain extender, and catalyst into the container, stir at 1200r / min, vacuum dehydrate at 60°C under the pressure of -0.2kPa, and then react at 130°C for 3h;

[0045] (2) Add polyvinyl alcohol resin to the reaction mass of step (1), after mixing uniformly, utilize twin...

Embodiment 2

[0047] In this example, the polyurethane elastomer was prepared from the following raw materials:

[0048]

[0049] Wherein said diisocyanate is the mixture of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate, the mass ratio of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate is 4:1, and described polyol is A mixture of polyether polyol and polyester polyol, the mass ratio of polyether polyol and polyester polyol is 8:1, and the number average molecular weight of polyol is 3000, and the chain extender is 1,4-butanediol , the catalyst is dibutyltin laurate.

[0050] The preparation method is as follows:

[0051] (1) Add diisocyanate, polyol, chain extender, and catalyst into the container, stir at 1500r / min, vacuum dehydrate at 70°C under the pressure of -0.3kPa, and then react at 120°C for 5h;

[0052] (2) Add polyvinyl alcohol resin to the reaction mass of step (1), after mixing uniformly, utilize a twin-screw extruder to extrude...

Embodiment 3

[0054] In this example, the polyurethane elastomer was prepared from the following raw materials:

[0055]

[0056] Wherein said diisocyanate is the mixture of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate, the mass ratio of isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate is 1:1, and said polyol is A mixture of polyether polyol and polyester polyol, the mass ratio of polyether polyol and polyester polyol is 5:1, and the number average molecular weight of polyol is 5000, and the chain extender is 1,5-pentanediol , the catalyst is dibutyltin dioctoate.

[0057] The preparation method is as follows:

[0058] (1) Add diisocyanate, polyol, chain extender, and catalyst into the container, stir at 1000r / min, vacuum dehydrate at 50°C under pressure of -0.1kPa, and then react at 140°C for 1 hour;

[0059] (2) Add polyvinyl alcohol resin to the reaction mass of step (1), after mixing uniformly, utilize twin-screw extruder to extrude and...

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Abstract

The invention provides a calendaring high-performance thermoplastic polyurethane elastomer and a preparation method thereof. The calendaring high-performance thermoplastic polyurethane elastomer provided by the invention is prepared from specific diisocyanate and polyhydric alcohol, and together with polyvinyl alcohol resin, the components act and coordinate with one another in a specific amount ratio, so that the prepared polyurethane is good in mechanical property and machinable property and good in elasticity, and the stick resistance can be improved. Tests show that the tensile strength of the polyurethane elastomer is greater than 90MPa, the breaking elongation of the polyurethane elastomer is up to 980%, the rebound rate of the polyurethane elastomer is greater than 88%, the adhesion property is grade 0, no adhesion can be caused when the polyurethane elastomer is left to stand for 8 hours at 80 DEG C, the polyurethane elastomer is applicable to calendaring, and the polyurethane elastomer is not adhered to metal devices in the calendaring process.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a calendering-grade high-performance thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane (TPU) is a new type of organic polymer synthetic material with excellent properties and can replace rubber and soft polyvinyl chloride material PVC. For example, it has excellent physical properties, such as wear resistance and resilience, which are better than ordinary polyurethane and PVC, and aging resistance is better than rubber. It can be said to be the most ideal material to replace PVC and PU. [0003] TPU can use calender melt processing technology to manufacture TPU film or TPU coating material. CN1408768A discloses a formula and calendering manufacturing method of an all-environmental friendly TPU film. Mixing in a mixer increases the difficulty of preparation for TPU calendering and requires conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/40C08G18/32C08L75/08C08L29/04B29C47/92B29B9/06B29C48/92
CPCC08G18/6607B29B9/06B29C48/92B29C2948/92704C08G18/3206C08G18/4018C08L75/08C08L2207/04C08L29/04
Inventor 何建雄王一良
Owner DONGGUAN XIONGLIN NEW MATERIAL TECH
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