Antifriction modified thermoplastic polyurethane elastomer formula as well as preparation method and application thereof

A technology of thermoplastic polyurethane and elastomer, which is applied in the formulation and preparation of friction-reducing modified thermoplastic polyurethane elastomer, which can solve the problems of increased heat, large frictional resistance, and high frictional heat generation, etc., and achieves improved tensile strength and wear rate. The effect of reducing and reducing the coefficient of friction

Inactive Publication Date: 2018-07-06
山西精专致科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane material has excellent wear resistance, but due to the extremely strong polar groups in the polyurethane molecule, the surface energy of polyurethane is high, and the self-lubricating property of polyurethane is poor. This increases the heat generated during friction, which limits the application of polyurethane in the field of friction. When it is applied to large-scale sealing devices, its friction resistance is large and friction heat is high, which is easy to cause wear on the seals, especially In a large sealing device running at high speed, it is easy to cause the seal to be squeezed out, causing an accident

Method used

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  • Antifriction modified thermoplastic polyurethane elastomer formula as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0059] Anti-friction modified thermoplastic polyurethane elastomer formula, including component A, component B, component C, and component D, prepared according to the ratio of parts by mass: 95-105: 7-9: 0.04-0.06: 14-16 ;

[0060] Among them, component A is a general-purpose thermoplastic polyurethane elastomer (TPU), prepared from the following raw materials in parts by mass:

[0061] Including 1,4-butylene adipate, 4,4-diphenylmethane diisocyanate, 1,4-butanediol (BDO, chain extender), parts by mass of each component: polyhexamethylene 385-415 parts of 1,4-butanediol acid ester, 105-145 parts of diphenylmethane diisocyanate, 26-29 parts of 1,4-butanediol;

[0062] Poly 1,4-butylene adipate is a polyester polyol, and the polyester polyol in the TPU elastomer constitutes the soft segment structure of the TPU elastomer.

[0063] 4,4-Diphenylmethane diisocyanate (MDI) is used as a coupling agent to connect polyester polyols to form urethane sparse soft segments, and at the s...

Embodiment 2

[0085] Anti-friction modified thermoplastic polyurethane elastomer formula, including component A, component B, component C, and component D, prepared according to the ratio of parts by mass of 100:8:0.05:15;

[0086] Among them, component A is a general-purpose thermoplastic polyurethane elastomer (TPU), prepared from the following raw materials in parts by mass:

[0087] Including 1,4-butylene adipate, 4,4-diphenylmethane diisocyanate, 1,4-butanediol (BDO, chain extender), parts by mass of each component: polyhexamethylene 400 parts of 1,4-butanediol acid ester, 125 parts of diphenylmethane diisocyanate, 28 parts of 1,4-butanediol;

[0088] Poly 1,4-butylene adipate is a polyester polyol, and the polyester polyol in the TPU elastomer constitutes the soft segment structure of the TPU elastomer. The poly-1,4-butylene adipate is the poly-1,4-butylene adipate with a molecular weight of 2000.

[0089] 4,4-Diphenylmethane diisocyanate (MDI) is used as a coupling agent to connect...

Embodiment 3

[0108] Anti-friction modified thermoplastic polyurethane elastomer formula, including component A, component B, component C, and component D, prepared according to the ratio of parts by mass of 95:7:0.04:14;

[0109] Among them, component A is a general-purpose thermoplastic polyurethane elastomer (TPU), prepared from the following raw materials in parts by mass:

[0110] Including 1,4-butylene adipate, 4,4-diphenylmethane diisocyanate, 1,4-butanediol (BDO, chain extender), parts by mass of each component: polyhexamethylene 400 parts of 1,4-butanediol acid ester, 125 parts of diphenylmethane diisocyanate, 28 parts of 1,4-butanediol;

[0111] Poly 1,4-butylene adipate is a polyester polyol, and the polyester polyol in the TPU elastomer constitutes the soft segment structure of the TPU elastomer. The poly-1,4-butylene adipate is the poly-1,4-butylene adipate with a molecular weight of 2000.

[0112] 4,4-Diphenylmethane diisocyanate (MDI) is used as a coupling agent to connect ...

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Abstract

The invention belongs to the field of a polyurethane elastomer and particularly relates to an antifriction modified thermoplastic polyurethane (TPU) elastomer formula as well as a preparation method and application thereof. The formula comprises a component A, a component B, a component C and a component D according to the mass ratio of (95-105):(7-9):(0.04-0.06):(14-16), wherein the component A is a universal type thermoplastic polyurethane elastomer; the component B is a compatilizer; the component C is a vulcanizing agent; and the component D is ultrahigh-molecular-weight polyurethane. Theformual has the following beneficial effects: the ultrahigh-molecular-weight polyurethane with the characteristic of low friction coefficient is used for antifriction and high-temperature-resistant modification of TPU, grafting modification is conducted by adding the compatilizer, the problems that the thermoplastic polyurethane elastomer and the ultrahigh-molecular-weight polyurethane have different polarities and low compatibility are solved, the dynamical friction coefficient of the antifriction modified thermoplastic polyurethane elastomer can be reduced by 43 to 46 percent, the wear ratecan be reduced by 87 to 91 percent and the tensile strength can be increased by 28 to 34 percent.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomer production, and in particular relates to a formula of a friction-reducing modified thermoplastic polyurethane elastomer, a preparation method and application thereof. Background technique [0002] Polyurethane elastomer has excellent wear resistance, good mechanical properties, and excellent tear resistance. This is because the hard segment of polyurethane has a strong polar group. This structure allows polyurethane to form hydrogen inside and between molecules. Bonds, under the action of hydrogen bonds, physical crosslinking occurs inside the polyurethane, making it known as "wear-resistant rubber". According to the difference in material processing methods, polyurethane elastomers can be divided into the following three types: thermoplastic, casting type and mixing type. Among them, thermoplastic polyurethane elastomer (TPU) is a new type of environmentally friendly sealing material. It ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L23/06C08L51/06C08L51/00C08K5/14C08G18/76C08G18/42C08G18/32
CPCC08G18/3206C08G18/4238C08G18/7671C08L75/06C08L2205/02C08L2205/035C08L2205/08C08L2207/068C08L23/06C08L51/06C08L51/003C08K5/14
Inventor 任琛华郭云霞郝琛芝
Owner 山西精专致科技股份有限公司
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