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Low-hardness, high-resilience, low-melting-point thermoplastic polyurethane elastomer and its preparation method and application

A thermoplastic polyurethane, high-resilience technology, applied in the field of thermoplastic polyurethane elastomers, can solve the problems of low resilience and inability to process films, etc.

Active Publication Date: 2020-10-16
ZHEJIANG HUAFENG THERMOPLASTIC POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned patents CN102719085A, CN101633717A, CN102532467A and US6221999B1 report high-resilience polyurethane elastomers, which are mainly made of polyether polyols, synthesized in two steps, cast into specific parts through molds, and the hardness is mainly distributed between 80-98A. The molecular structure of this type of elastomer generally has cross-linking units, which cannot be processed into a film with a low gel point by means of a casting machine.
[0010] CN101402719A and CN104193957A have introduced one-step method to produce thermoplastic polyurethane elastomer, and main raw material is still polyether diol, and hardness is all above 85A simultaneously, and resilience is all on the low side

Method used

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  • Low-hardness, high-resilience, low-melting-point thermoplastic polyurethane elastomer and its preparation method and application
  • Low-hardness, high-resilience, low-melting-point thermoplastic polyurethane elastomer and its preparation method and application
  • Low-hardness, high-resilience, low-melting-point thermoplastic polyurethane elastomer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (A) Polyester polyol:

[0067] The molar ratio of 1,4-butanediol, 1,6-hexanediol, and 1,1,1-tri(hydroxymethyl)propane is 2:100:1;

[0068] The catalyst is stannous octoate, and the molar amount is 0.0002% of the molar amount of 1,4-butanediol;

[0069] Preparation:

[0070] React 1,4-butanediol, 1,6-hexanediol, 1,1,1-tri(hydroxymethyl)propane, 1,6-hexanedioic acid and catalyst at 140°C for 20 hours, remove Water, can obtain described polyester polyol, number average molecular weight is 2000;

[0071] The (A) polyester polyol is heated to 110°C;

[0072] Heat (B) 4,4'-methylenebis(phenylisocyanate) to 60°C;

[0073] (C) 1,2-ethanediol is heated to 60°C;

[0074] Send component (A), component (B) and component (C) into the mixing head for mixing, then pour into the twin-screw extruder for reaction and extrusion, and then pelletize under water to remove the obtained particles Moisture, ripening, can obtain described low hardness high resilience low melting point ther...

Embodiment 2

[0083] (A) Polyester polyol:

[0084] Components and ratio:

[0085] The molar ratio of 1,4-butanediol, 1,6-hexanediol, and 1,2,3-propanetriol is 200:100:6;

[0086] The catalyst is stannous octoate, and the molar amount is 0.001% of the molar amount of 1,4-butanediol;

[0087] Preparation:

[0088] React 1,4-butanediol, 1,6-hexanediol, 1,2,3-propanetriol, 1,6-hexanedioic acid, catalyst and additives at 150°C for 24 hours, remove water in vacuum , the polyester polyol can be obtained, and the number average molecular weight is 2000;

[0089] Described auxiliary agent is:

[0090] Antioxidant 1010 adopts the Irganox 1010 brand product of BASF, and the weight consumption is 0.005% of 1,4-butanediol weight;

[0091] The lubricant polyethylene wax is H110 brand product of Haihao Company, and the weight dosage is 0.006% of the weight of 1,4-butanediol;

[0092] The (A) polyester polyol is heated to 120°C;

[0093] (B) a mixture of 4,4'-methylenebis(phenylisocyanate) and tolu...

Embodiment 3

[0105] (A) Polyester polyol:

[0106] Components and ratio:

[0107] The molar ratio of 1,4-butanediol, 1,6-hexanediol, and 1,1,1-tris(hydroxymethyl)ethane is 100:100:4;

[0108] The catalyst is dibutyltin dilaurate, and the molar dosage is 0.02% of the molar dosage of 1,4-butanediol;

[0109] Preparation:

[0110] React 1,4-butanediol, 1,6-hexanediol, 1,1,1-tri(hydroxymethyl)ethane, 1,6-adipic acid, catalyst and additives at 120°C for 16 Hour, vacuum dewatering, can obtain described polyester polyol, number-average molecular weight is 2000;

[0111] Antioxidant 1010 adopts the Irganox 1010 brand product of BASF, and the weight consumption is 0.005% of 1,4-butanediol weight;

[0112] The anti-ultraviolet light agent UV-328 adopts the Tinuvin328 brand product of BASF Company, and the weight dosage is 0.006% of the molar weight of 1,4-butanediol,

[0113] The lubricant polyethylene wax is H110 brand product of Haihao Company, and the weight dosage is 0.005% of the molar amo...

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Abstract

The invention provides a low-hardness high-resilience low-melting point thermoplastic polyurethane elastomer as well as a preparation method and application. The low-hardness high-resilience low-melting point thermoplastic polyurethane elastomer is prepared from polyester polyol, aromatic diisocyanate and binary micromolecule alcohol chain extender in a mass ratio of 100:(16-33):(2-8), wherein thepolyester polyol is prepared from 1,4-butanediol, 1,6-hexanediol and micromolecule polyhydric alcohols as raw materials which are reacted with a binary acid in the presence of a catalyst; the mole ratio of 1,4-butanediol to 1,6-hexanediol to micromolecule polyhydric alcohols is (2-500):100:(1-20); the number-average molecular weight of the polyester polyol is 500-4000. The high-resilience thermoplastic elastomer is synthesized by using a one-step method, the hardness range of the elastomer is 45-80A, the melting point of the elastomer is 80-150 DEG C, the breaking elongation of the elastomeris 1000-1700%, the elastomer can be applied to production of high-resilience films, fine lines or line woven nets, and the 100% fixed tensile resilience of the material is greater than or equal to 90%.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane elastomer and its preparation method and application. Background technique [0002] Polyurethane elastomers are divided into three types according to processing characteristics: casting type, thermoplastic type and mixing type. They are widely used in coal mining, petrochemical, machinery manufacturing, aerospace and other fields, and play an irreplaceable role for other materials. Currently, the high-resilience polyurethane elastomer patents on the market mainly produce castable high-resilience polyurethane elastomers through a two-step process, which is pre-polymerized and then vulcanized. industrial field. The resilience characterization method of this type of polyurethane elastomer is mainly measured by pendulum impact elasticity and falling ball impact elasticity. [0003] Patent CN102719085A reports polytetrahydrofuran 2000 molecular weight polyether diol, 4,4'-methylenebis(phenylisocyanate)...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G63/20C08L75/06C08J5/18
CPCC08G18/3206C08G18/4241C08G18/664C08G18/7607C08G18/7614C08G18/7671C08G63/20C08J5/18C08J2375/06
Inventor 袁仁能杨鹏洲范东风施龙敏陈光静李俊江马肥陈敏潘玉燕林龙
Owner ZHEJIANG HUAFENG THERMOPLASTIC POLYURETHANE
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