Low permanent compression deformation thermoplastic polyurethane elastomer

A thermoplastic polyurethane and permanent deformation technology, applied in the field of thermoplastic polyurethane elastomers, can solve problems such as unsatisfactory effects and complicated methods, and achieve the effects of increasing service life, enhancing pressure resistance, improving durability and usability

Inactive Publication Date: 2012-07-04
烟台美瑞化学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a kind of low compression set thermoplastic polyurethane elastomer, mainly solve the existing problems such as the complex method of improving TPU resistance to compression set performance, the effect is not ideal etc.

Method used

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  • Low permanent compression deformation thermoplastic polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In Example 1, the raw materials used are the following components, and each component is in mass fraction:

[0036] Diphenylmethane 4,4’-diisocyanate (MDI) 564g

[0037] 1,4-butanediol adipate (PBA) (molar mass 2000g / mol) 1000 grams

[0038] 1,4-Butanediol (BDO) (molar mass is 90.123g / mol, functionality is 2) 151 grams

[0039] Trimethylolpropane (TMP) (molar mass 134g / mol, functionality 3) 1.0 g

[0040] Catalyst: Stannous octoate 0.01g

[0041] Antioxidant: Irganox ? 1010 3 grams

[0042] A mixture of 1000 grams of PBA, 151 grams of BDO and 3 grams of TMP is heated to 90°C, and then 3 grams of Irganox are added ? 1010 and 0.01 g of stannous octoate were stirred with a paddle mixer at a speed of 500 revolutions per minute, and then 564 g of MDI was added, the mixture was continued to be stirred for 20 seconds, and then poured onto a metal tray coated with polytetrafluoroethylene; The cured product is placed in an oven at 80°C for 24 hours, then crushed an...

Embodiment 2

[0043] In Example 2, the raw materials used are the following components, and each component is in mass fraction:

[0044] Diphenylmethane 4,4’-diisocyanate (MDI) 564g

[0045] 1,4-butanediol adipate (PBA) (molar mass is about 2000g / mol) 1000 grams

[0046] 1,4-Butanediol (BDO) (molar mass is 90.123g / mol, functionality is 2) 77 g

[0047] Trimethylolpropane (TMP) (molar mass is 134g / mol, functionality is 3) 76.3 g

[0048] Catalyst: stannous octoate 0.01g

[0049] Antioxidant: Irganox ? 1010 3 grams

[0050] A mixture of 1000 grams of PBA, 77 grams of BDO and 76.3 grams of TMP is heated to 90°C, and then 3 grams of Irganox is added ? 1010 and 0.01 g of stannous octoate were stirred with a paddle mixer at a speed of 500 revolutions per minute, and then 564 g of MDI was added. The mixture was continued to be stirred for 20 seconds, and then poured onto a metal tray coated with PTFE to obtain The cured product is placed in an oven at 80°C for 24 hours and then ...

Embodiment 3

[0051] In Example 3, the raw materials used are the following components, and each component is in mass fraction:

[0052] Diphenylmethane 4,4’-Diisocyanate (MDI) 564g

[0053] Polyethylene adipate 1,4-butanediol-ester (PBA) (molar mass 2000g / mol) 1000 grams

[0054] 1,4-Butanediol (BDO) (molar mass is 90.123g / mol, functionality is 2) 143.3g

[0055] Placell ? 305 (molar mass is 550g / mol, functionality 3) 46g

[0056] Catalyst: stannous octoate 0.01g

[0057] Antioxidant: Irganox ? 1010 3g

[0058] Among them, Placell ? 305 is produced by Japanese Daicel

[0059] 1000g PBA and 143.3g BDO, 46g Placell ? The 305 mixture is heated to 90°C, then 3 grams of Irganox is added ? 1010 and 0.01 g of stannous octoate were stirred with a paddle mixer at a speed of 500 revolutions per minute, and then 564 g of MDI was added, the mixture was continued to be stirred for 20 seconds, and then poured onto a metal tray coated with polytetrafluoroethylene; The cured...

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Abstract

The invention discloses a low permanent compression deformation thermoplastic polyurethane elastomer, which is characterized in that: a certain amount of short-chain alcohol with the molar mass of 100-600g and the functionality of more than 2 is added into a chain extender; and due to the crosslinking of the short-chain alcohol, the elasticity, strength and permanent compression deformation resistance of a product are improved.

Description

Technical field: [0001] The invention relates to the technical field of thermoplastic polyurethane elastomers, in particular to a method for preparing low-compression permanent deformation thermoplastic polyurethane elastomers, which is suitable for the production of sealing rings, automotive shock-absorbing parts, bushings or other parts requiring low compression permanent deformation . Background technique: [0002] Thermoplastic polyurethane elastomer (TPU) is of great industrial importance due to its good elastomer properties and thermoplastic processability. For example, the preparation, performance and application of TPU are described in detail in the "Handbook of Polyurethane Elastomers" (Chemical Industry Press, 2005, P398) compiled by the Shanxi Provincial Institute of Chemical Industry. [0003] The compression set value is the amount of permanent deformation that occurs after a material is compressed to a certain shape at a certain temperature and maintained for a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/44C08L75/06C08L75/08C08L75/04
Inventor 王仁鸿张生赵玮赵文雅杨阳
Owner 烟台美瑞化学材料有限公司
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