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A highly-wear-resistant thermoplastic polyurethane elastomer and a preparing method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of polyurethane, can solve problems such as affecting product processing, long injection molding cycle of polyurethane elastomer, affecting product use, etc.

Inactive Publication Date: 2018-05-15
清远新力化机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Then these methods also brought other problems to polyurethane elastomers: 1. Blindly enhancing the physical properties of polyurethane elastomers requires higher processing temperatures on the one hand, which affects the processing of products and increases production energy consumption and equipment loss; on the other hand Stronger physical properties often lead to longer injection molding cycles for polyurethane elastomers, reducing production efficiency
2. The addition of too much ethylene bis stearamide lubricant will greatly increase the risk of oil and powder in the product, which will affect the use of the product
3. Due to the particularity of polyurethane elastomer, it has poor compatibility with most plastics
Once mixed with other plastics for modification, the characteristic performance must be greatly reduced, and the environmental protection characteristics of polyurethane elastomers may also be lost

Method used

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  • A highly-wear-resistant thermoplastic polyurethane elastomer and a preparing method thereof
  • A highly-wear-resistant thermoplastic polyurethane elastomer and a preparing method thereof
  • A highly-wear-resistant thermoplastic polyurethane elastomer and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0022] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:15, add 5‰ silicone oil, and stir thoroughly at 80-90°C for 0.5 -1 hour to obtain a mixture of polyester diol and 1,4-butanediol. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:

[0023]

[0024] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.

[0025] Add 50% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.06‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging for 60 hours at 80°C, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.

[0026] Mix polyurethane elastomer with 4‰ of silicone masterbatch, ...

specific Embodiment 2

[0027] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:40, add 5‰ silicone oil, and stir thoroughly at 80-90°C for 1 Hours, a mixture of polyester diol and 1,4-butanediol was obtained. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:

[0028]

[0029] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.

[0030] Add 90% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.06‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging at 85°C for 70 hours, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.

[0031] Mix polyurethane elastomer with 5‰ silicone masterbatch, bak...

specific Embodiment 3

[0032] Preparation of the mixture of polyester diol and 1,4-butanediol: mix polyester diol and 1,4-butanediol at a ratio of 100:30, add 7‰ silicone oil, and stir thoroughly at 80-90°C for 1 Hours, a mixture of polyester diol and 1,4-butanediol was obtained. The silicone oil is a linear non-reactive polydimethylsiloxane with a molecular weight between 7000-12000 and a molecular structure as follows:

[0033]

[0034] The polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol; the molecular weight is 2000-3000.

[0035] Add 70% of the weight of the mixture of 4,4'-diphenylmethane diisocyanate and 0.04‰ of the catalyst stannous octoate to the mixture of polyester diol and 1,4-butanediol, fully stir the reaction, the initial reaction temperature After aging at 85°C for 70 hours, it is crushed and granulated by a granulator to obtain a polyurethane elastomer with a Shore hardness of 90A-64D.

[0036] Mix polyurethane elastomer with 5‰ silicone masterbatch, bak...

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Abstract

A preparing method of a highly-wear-resistant thermoplastic polyurethane elastomer is disclosed. The method includes 1) a step of preparing a mixture of polyester diol and 1,4-butanediol, namely a step of mixing the polyester diol and 1,4-butanediol according to a weight ratio of 100:15-100:40, adding a trace amount of silicone oil into the mixture, fully stirring the mixture at 80-90 DEG C for 0.5-1 h to obtain the mixture of the polyester diol and the 1,4-butanediol; and 2) a step of mixing and reacting the mixture obtained in the step 1), 4,4'-diphenylmethane diisocyanate the weight of which is 50-90% of the weight of the mixture, and a trace amount of a catalyst that is stannous 2-ethylhexanoate to obtain the polyurethane elastomer. The objective of the invention is to provide the highly-wear-resistant thermoplastic polyurethane elastomer which has low oil and powder exudation rates, good basic wear resistance and a low auxiliary agent exudation rate and the preparing method thereof.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a high wear-resistant thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Although thermoplastic polyurethane elastomer itself has good wear resistance, in some special application fields, such as polyurethane tires, wear-resistant belts and shoe materials, the wear resistance of general plastic polyurethane elastomer materials still cannot meet the application requirements. How to obtain thermoplastic polyurethane elastomers with low coefficient of friction, good physical properties, and no oil or powder during the service life of the product is the key to solving this application field. [0003] At present, the main means to improve polyurethane elastomers are: 1. Increase the proportion of hard segments in formula design to enhance the physical properties of polyurethane elastomers; 2. Add a large amount of ethylene bis stearamide lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L83/04C08L23/06C08J3/22C08G18/76C08G18/66C08G18/42C08G18/32
CPCC08G18/3206C08G18/4238C08G18/664C08G18/7671C08J3/226C08J2375/06C08J2423/06C08J2483/04
Inventor 徐敏静李泽雄
Owner 清远新力化机有限公司
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