Low-hardness and high-strength thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and high-strength technology, which is applied in the field of low-hardness and high-strength thermoplastic polyurethane elastomer and its preparation, can solve the problems of being difficult to achieve and single, and achieve the effects of low preparation cost, improved flexibility, and improved mechanical properties.

Active Publication Date: 2016-03-30
DONGGUAN JINGLUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the current raw materials and methods for the preparation of polyurethane are relatively mature and simple, and need to be synthesized through complex catalytic polymerization reactions, it is only possible to add certain additives according to its single performance requirements to obtain products with more outstanding performance.
If it is necessary to improve the comprehensive performance of polyurethane materials, it is difficult to achieve according to the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A thermoplastic polyurethane elastomer with low hardness and high strength, comprising component A and component B prepared according to the mass percentage of 70:30, wherein component B is low density polyethylene, and component A consists of the following parts by mass Prepared from raw materials:

[0031] 400 parts of poly-1,4-butylene adipate diol

[0032] 27 parts of 1,4-butanediol

[0033] 125 parts of diphenylmethane diisocyanate.

[0034] Preparation:

[0035] Preparation of component A: Add 1,4-butylene adipate diol and 1,4-butanediol to the A feed tank of the pouring machine by mass ratio, and diphenylmethane diisocyanate by mass Ratio is added to material trough B, the temperature of material trough A is 60°C, and the temperature of material trough B is 65°C. Adjust the feeding ratio of material trough A and material trough B to be 1:1; import the mixed material into the extruder, extrude and granulate, and the temperature of the extruder is divided into ...

Embodiment 2

[0038] A thermoplastic polyurethane elastomer with low hardness and high strength, comprising component A and component B prepared according to the mass percentage of 75:25, wherein component B is low-density polyethylene, and component A consists of the following parts by mass Prepared from raw materials:

[0039] 380 parts of poly-1,4-butylene adipate diol

[0040] 28 parts of 1,4-butanediol

[0041] 110 parts of diphenylmethane diisocyanate.

[0042] Preparation:

[0043] Preparation of component A: Add 1,4-butylene adipate diol and 1,4-butanediol to the A feed tank of the pouring machine by mass ratio, and diphenylmethane diisocyanate by mass Ratio is added to material trough B, the temperature of material trough A is 60°C, and the temperature of material trough B is 65°C. Adjust the feeding ratio of material trough A and material trough B to be 1:1; import the mixed material into the extruder, extrude and granulate, and the temperature of the extruder is divided into ...

Embodiment 3

[0046] A thermoplastic polyurethane elastomer with low hardness and high strength, comprising component A and component B prepared according to the mass percentage of 80:20, wherein component B is low density polyethylene, and component A consists of the following parts by mass Prepared from raw materials:

[0047] 420 parts of poly-1,4-butylene adipate diol

[0048] 25 parts of 1,4-butanediol

[0049] 145 parts of diphenylmethane diisocyanate.

[0050] Preparation:

[0051] Preparation of component A: Add 1,4-butylene adipate diol and 1,4-butanediol to the A feed tank of the pouring machine by mass ratio, and diphenylmethane diisocyanate by mass Ratio is added to material trough B, the temperature of material trough A is 60°C, and the temperature of material trough B is 65°C. Adjust the feeding ratio of material trough A and material trough B to be 1:1; import the mixed material into the extruder, extrude and granulate, and the temperature of the extruder is divided into ...

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Abstract

The invention relates to the technical field of preparation of a polyurethane elastomer, specifically to a low-hardness and high-strength thermoplastic polyurethane elastomer and its preparation method. The low-hardness and high-strength thermoplastic polyurethane elastomer is prepared from a component A and a component B according to the mass ratio of 70-80:30-20, wherein the component A contains polyester of aliphatic dicarboxylic acids, 1,4-butylene glycol and diphenyl-methane-diisocyanate; and the component B is low density polyethylene. The component A and the component B are mixed, and then synthesis of an elastomer is carried out. Hardness of the elastomer is 60 A, tensile strength is greater than 40 KN / m, tensile strength is greater than 38 MPa, and elongation at break is greater than 700%. The elastomer has prominent comprehensive properties and can be widely applied in special fields of escalator rails, driving belts, synchronous belts, sealing strips and the like.

Description

technical field [0001] The invention relates to the technical field of polyurethane elastomer preparation, in particular to a thermoplastic polyurethane elastomer with low hardness and high strength and a preparation method thereof. Background technique [0002] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeated carbamate groups on the main chain. It is formed by addition polymerization of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy compound. Polyurethane material has a wide range of uses and can replace rubber, plastic, nylon, etc. It is used in airports, hotels, building materials, automobile factories, coal mines, cement factories, high-end apartments, villas, landscaping, colored stone art, parks, etc. [0003] Polyurethane introduction can be divided into seven categories according to performance classification: (1) Super wear-resistant and self-lubricating PU elastomer product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L23/06C08G18/66C08G18/42C08G18/32B29C47/92B29C48/92
Inventor 李文正
Owner DONGGUAN JINGLUN IND
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