Polyether ester polyurethane elastomer and preparation method thereof

A polyurethane elastomer and polyurethane prepolymer technology, applied in the field of polyether ester polyurethane elastomer, can solve the problems of poor hydrolysis resistance and poor mechanical properties, and achieve improved hydrolysis resistance, excellent comprehensive performance, and good application prospects Effect

Inactive Publication Date: 2014-01-01
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyester-based PUE has good mechanical properties and wear resistance, but its hydrolysis resistance is poor, while polyether-based PUE has good hydrolytic stability, but poor mechanical properties

Method used

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  • Polyether ester polyurethane elastomer and preparation method thereof
  • Polyether ester polyurethane elastomer and preparation method thereof
  • Polyether ester polyurethane elastomer and preparation method thereof

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preparation example Construction

[0029] Preparation of polyether ester polyol: polyether ester polyol is based on polyester polyol as starter, in bimetallic catalyst DMC (such as Zn 3 [Co(CN) 6 ] 2 ) in the presence of propylene oxide ring-opening polymerization, Mn = 2000, its preparation method see patent CN101024684A.

[0030] (1) In a pressure-resistant reactor with a volume of 225 ml, add polyester polyols made of dibasic acids and diols, double metal cyanide complex catalyst DMC, heat to 105±3°C, and vacuum After removing water and volatile components, mix for 5 minutes in an ultrasonic mixer with a frequency of 40KHz and a power of 500 watts;

[0031] (2) Add a part of propylene oxide into the pressure-resistant reaction kettle in (1) above under the conditions of 110±3℃, nitrogen protection and stirring, and after the pressure in the reaction kettle drops significantly, gradually add the remaining Propylene oxide is placed in the reaction kettle. After the reaction is completed, the unreacted propy...

Embodiment 1

[0034] 100 parts by weight of polyether ester polyol (M n =2000) for vacuum dehydration, cooled to 55°C, added 8.77 parts by weight of toluene-2,4-diisocyanate (TDI), slowly raised the temperature to 80°C, and kept the temperature for 1 hour to prepare a polyurethane preform with an NCO mass fraction of 3.5%. Polymer. Weigh the polyurethane prepolymer and heat it to 80°C, add 10.903 parts by weight of chain extender to melt 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) according to the chain extension coefficient of 0.90, and stir rapidly Evenly, pour it into a preheated mold, pressurize and vulcanize it on a flat vulcanizing machine under the conditions of 8MPa and 100°C, put the test piece in an oven at 100°C after demoulding, and vulcanize for 8 hours to obtain a polyether ester polyurethane elastomer.

Embodiment 2

[0036] 100 parts by weight of polyether ester polyol (M n =2000) for vacuum dehydration, cooled to 55°C, added 8.79 parts by weight of toluene-2,4-diisocyanate (TDI), slowly raised the temperature to 80°C, and kept the temperature for 1 hour to prepare a polyurethane preform with an NCO mass fraction of 4.0%. Polymer. Weigh the polyurethane prepolymer and heat it to 80°C, add 12.45 parts by weight of chain extender to melt 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) according to the chain extension coefficient of 0.90, and stir rapidly Evenly, pour it into a preheated mold, pressurize and vulcanize it on a flat vulcanizing machine under the conditions of 8MPa and 100°C, put the test piece in an oven at 100°C after demoulding, and vulcanize for 8 hours to obtain a polyether ester polyurethane elastomer.

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Abstract

The present invention discloses a polyether ester polyurethane elastomer, which is prepared from the following components, by weight: 100 parts of polyether ester polyol, 8.5-13 parts of diisocyanate, and 10-19 parts of a chain extender. The invention further discloses a preparation method for the polyether ester polyurethane elastomer. According to the present invention, the novel polyether ester polyol is adopted as the raw material, and the polyether ester polyol has characteristics of low unsaturation degree, relatively narrow molecular weight distribution and the like, such that the prepared polyether ester polyurethane elastomer has better mechanical property compared with the polyether type PUE, has substantially increased hydrolysis resistance compared with the polyester type PUE, and further has excellent comprehensive performance and good application prospects.

Description

technical field [0001] The invention relates to a polyurethane elastomer, in particular to a polyether ester polyurethane elastomer. Background technique [0002] Polyurethane elastomer (PUE) has outstanding comprehensive performance, which is difficult to compare with other commodity rubber and plastics, and PUE can be synthesized according to processing and molding requirements, and can be processed by almost any conventional process of polymer materials, such as mixing Molding, calendering, liquid casting, melt injection, extrusion, glue coating, blow molding, spinning and machining, etc. Therefore, PUE is widely used and has a good development prospect. [0003] According to the different types of oligomer polyols used, PUE can be divided into polyester type PUE, polyether type PUE, polycarbonate type PUE, polyolefin type PUE and other types, among which polyester type PUE, polyether type There are many applications of PUE. Polyester-based PUE has good mechanical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/10
CPCC08G18/10C08G18/48C08G18/6674C08G18/6685
Inventor 刘明昌
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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