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Modified thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of modified thermoplastic polyurethane elastomer and its preparation, can solve the problems of poor compatibility, multi-step, doping of compatibilizers, etc., and achieve the effect of improving hardness and strength

Inactive Publication Date: 2017-11-03
福建汇得新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies existing in the modification technology of existing thermoplastic polyurethane elastomers, the purpose of the present invention is to provide a kind of formula and preparation method of modified thermoplastic polyurethane elastomers, select styrene-grafted polyester polyol , improve the performance of thermoplastic polyurethane elastomers, solve the problems of multi-step, poor compatibility and doping compatibilizers in plastic blending, and can significantly improve the physical and mechanical properties of thermoplastic polyurethane elastomers

Method used

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  • Modified thermoplastic polyurethane elastomer and preparation method thereof

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Embodiment 1

[0024] A modified thermoplastic polyurethane elastomer is made from raw materials comprising the following parts by weight:

[0025] 70.0 parts of styrene grafted polyester polyols;

[0026] 24.4 parts of diphenylmethane diisocyanate MDI;

[0027] Butanediol 5.6 parts.

[0028] The preparation method of modified thermoplastic polyurethane elastomer comprises the following steps:

[0029] (1) Vacuum dehydration of styrene-grafted polyester polyol and butanediol at 120°C and 100°C for 3-5h respectively;

[0030] (2) The diphenylmethane diisocyanate of the dried styrene graft modified polyester diol that takes 70 parts by weight, 24.4 parts joins in the reaction vessel, is heated up to at 260r / min stirring speed 80°C, vacuum reaction for 2h;

[0031] (3) Release the vacuum, add 5.6 parts of dried chain extender butanediol into the reaction vessel, stir rapidly, the temperature of the material gradually rises to 120°C, the viscosity increases significantly, stop stirring, and ...

Embodiment 2

[0033] Modified thermoplastic polyurethanes, made from raw materials comprising the following percentages by weight:

[0034] 60.0 parts of styrene grafted polyester polyols;

[0035] 31.6 parts of diphenylmethane diisocyanate MDI;

[0036] Butanediol 8.4 parts.

[0037] The preparation method of modified thermoplastic polyurethane elastomer comprises the following steps:

[0038] (1) Vacuum dehydration of styrene-grafted polyester polyol and butanediol at 120°C and 100°C for 3-5h respectively;

[0039] (2) Weighing 60 parts by weight of dried styrene-grafted polyester polyol and 31.6 parts of diphenylmethane diisocyanate were added to the reaction vessel, and the temperature was raised to 80° C. at a stirring speed of 260 r / min. Vacuum reaction for 2h;

[0040] (3) Release the vacuum, add 8.4 parts of dried chain extender butylene glycol into the reaction vessel, stir rapidly, the temperature of the material gradually rises to 120°C, the viscosity increases significantly,...

Embodiment 3

[0042] Modified thermoplastic polyurethanes, made from raw materials comprising the following percentages by weight:

[0043] Styrene grafted polyester polyol 50.0

[0044] Diphenylmethane diisocyanate MDI 38.7

[0045] Butanediol 11.3

[0046] The preparation method of modified thermoplastic polyurethane elastomer comprises the following steps:

[0047] (1) Vacuum dehydration of styrene-grafted polyester polyol and butanediol at 120°C and 100°C for 3-5h respectively;

[0048] (2) Weighing 50 parts by weight of dried styrene-grafted polyester polyol and 38.7% diphenylmethane diisocyanate into the reaction vessel, heated up to 80°C at a stirring speed of 260r / min, Vacuum reaction for 2h;

[0049] (3) Release the vacuum, add 11.3 parts of dried chain extender butylene glycol into the reaction vessel, stir rapidly, the temperature of the material gradually rises to 120°C, the viscosity increases significantly, stop stirring, and pour it into a polytetrafluoroethylene tray , ...

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Abstract

The invention relates to modified thermoplastic polyurethane elastomer and a preparation method thereof. A formula of the modified thermoplastic polyurethane elastomer comprises the following raw materials in parts by weight: 50% to 70% of grafted polyester polyol, 20% to 40% of diisocyanate and 5% to 15% of chain extender. The thermoplastic polyurethane disclosed by the invention can be easily prepared by a general preparation method; the styrene grafted modified polyester polyol is chosen to prepare the modified thermoplastic polyurethane elastomer, so that the problems of multiple steps, poor compatibility, compatilizer doping and the like in blending plastics are solved, and performance of the thermoplastic elastomer is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a modified thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer is a widely used polymer material, which has the advantages of firmness, wear resistance, corrosion resistance, aging resistance and low pollution. However, there are still some deficiencies in physical and mechanical properties and thermal stability, and other materials are often used to enhance it to improve its performance. The most commonly used method is to blend other materials with it, but the blending effect is also affected by its compatibility with the material, miscibility and blending method. The graft-modified polyester polyol can modify the thermoplastic polyurethane directly by changing the raw material, and improve the physical and mechanical properties such as hardness and strength of the material. Conte...

Claims

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Application Information

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IPC IPC(8): C08G18/65C08G18/63C08G18/32
CPCC08G18/6564C08G18/3206C08G18/631
Inventor 钱建中周伟王平平却靖徐强
Owner 福建汇得新材料有限公司
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