Hydrolysis-resistant thermoplastic polyurethane elastomer and manufacture method thereof

A technology of thermoplastic elastomer and polyurethane, which is applied in the field of hydrolysis-resistant thermoplastic elastomer materials and its manufacture, can solve the problems of decreased mechanical properties and poor hydrolytic stability, and achieve excellent mechanical properties, improved hydrolytic stability, and good processing fluidity Effect

Inactive Publication Date: 2011-08-17
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of poor hydrolytic stability of existing polyester-type thermoplastic polyurethane elastomers and obvious decline in mechanical properties after water absorption, and provide a kind of polymer with excellent mechanical properties, good processing performance, and low water absorption. Hydrolysis-resistant polyurethane thermoplastic elastomer with significantly improved hydrolysis stability and manufacturing method thereof

Method used

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  • Hydrolysis-resistant thermoplastic polyurethane elastomer and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh raw materials, thermoplastic polyurethane resin: 100 parts of polyester TPU resin; anti-hydrolysis compound: 4 parts of polycarbodiimide; antioxidant: tetrakis[methyl-β-(3,5-di-tert-butyl-4- Hydroxyphenyl) propionate] 0.15 parts of pentaerythritol esters; lubricant: 0.2 parts of zinc stearate.

[0023] Mixing: polyester TPU resin with polycarbodiimide, tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, zinc stearate, etc. Blend well in a blender.

[0024] Granulation: Extrude with a twin-screw extruder, granulate, and finally dry and pack.

[0025] In the granulation step, the temperature of each section of the twin-screw extruder starting from the feeding port is 165~168°C, 170~175°C, 175~180°C, 175~180°C, 175~180°C, 175~180°C, The head temperature is 172~175°C.

[0026] The modified material exhibits excellent mechanical properties, hydrolytic stability (see Table 1), and good molding processability.

Embodiment 2

[0028] Weigh raw materials, thermoplastic polyurethane resin: 100 parts of polyester TPU resin; anti-hydrolysis compound: 3 parts of 1, 2-epoxy-3-phenoxypropane; antioxidant: tetrakis[methyl-β-(3,5 - 0.2 parts of di-tert-butyl-4-hydroxyphenyl propionate] pentaerythritol ester; lubricant: 0.3 parts of calcium stearate.

[0029] Mixing: polyester TPU resin with 1, 2-epoxy-3-phenoxypropane, tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenylpropionate) pentaerythritol Ester and calcium stearate are mixed evenly in a blender.

[0030] Granulation: Extrude with a twin-screw extruder, granulate, and finally dry and pack.

[0031] In the granulation step, the temperature of each section of the twin-screw extruder starting from the feeding port is 165~168°C, 170~175°C, 175~180°C, 175~180°C, 175~180°C, 175~180°C, The head temperature is 172~175°C.

[0032] The modified material exhibits excellent mechanical properties, hydrolytic stability (see Table 1), and good molding processabi...

Embodiment 3

[0034] Weigh raw materials, thermoplastic polyurethane resin: 100 parts of polyester TPU resin; anti-hydrolysis compound: 4 parts of bisphenol A diglycidyl ether with an epoxy value of 0.48~0.52; antioxidant: 4, 4'-di-tert-octyl 0.3 part of diphenylamine; lubricant: 0.25 part of zinc stearate.

[0035] Mixing: Mix polyester TPU resin with bisphenol A diglycidyl ether, 4, 4'-di-tert-octyldiphenylamine and zinc stearate in a blender evenly.

[0036] Granulation: Extrude with a twin-screw extruder, granulate, and finally dry and pack.

[0037] In the granulation step, the temperature of each section of the twin-screw extruder starting from the feeding port is 165~168°C, 170~175°C, 175~180°C, 175~180°C, 175~180°C, 175~180°C, The head temperature is 172~175°C.

[0038] The modified material exhibits excellent mechanical properties, hydrolytic stability (see Table 1), and good molding processability.

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Abstract

The invention discloses a hydrolysis-resistant thermoplastic polyurethane elastomer containing the following components in parts by mass: 100 parts of thermoplastic polyurethane resin, 3-20 parts of hydrolysis-resistant compound, 0.15-0.3 part of antioxidant and 0.2-0.4 part of lubricant. The thermoplastic polyurethane resin is polyester type polyurethane resin; the hydrolysis-resistant compound is a mixture of one or more of the following matters: polycarbodiimide, 1,2-epoxy-3-phenoxypropane, bisphenol A diglycidyl ether, 3-(2,3-glycidoxy)propyl-trimethoxy silane and maleic anhydride grafted styrene-ethylene/butylene-styrene block copolymer; the antioxidant is a mixture of one or both of pentaerythritol tertrakis(methyl-beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) and 4,4'-di-tert-octyldiphenylamine; and the lubricant is a mixture of one or both of zinc stearate and calcium stearate. The hydrolysis-resistant thermoplastic polyurethane elastomer disclosed by the invention is suitable for being taken as electric wire and cable sheath layer materials, medical materials, various hoses, shoe materials, sealing elements, wear-resistant components and the like.

Description

technical field [0001] The invention relates to a hydrolysis-resistant thermoplastic elastomer material and a manufacturing method thereof, in particular to a hydrolysis-resistant polyester thermoplastic polyurethane elastomer and a manufacturing method thereof. The material is suitable for use as wire and cable sheath materials, medical materials, Various hoses, shoe materials, seals and wear-resistant components, etc. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) has the characteristics of light weight, good elasticity, excellent mechanical properties, wear resistance and oil resistance, and is widely used in the fields of automobiles, machinery, electrical engineering, shoe materials and medical materials. [0003] If TPU is classified according to its soft segment structure, it can be mainly divided into polyester type and polyether type. Polyether TPU has good resilience, low temperature resistance and hydrolysis resistance; polyester TPU h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5435C08K5/098C08L75/06C08L75/00C08K5/134C08K5/18B29C47/92C08K5/1515C08L51/00B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 肖望东刘文作夫徐令军林峰
Owner SHENZHEN POLYTECHNIC
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