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Transparent fast- forming low-hardness thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and low-hardness technology, applied in the field of low-hardness thermoplastic polyurethane elastomer and its preparation, can solve problems such as difficulty in obtaining transparency, inability to meet processing requirements, and limit the application of low-hardness products, and achieve low hardness and good formability , good transparency effect

Active Publication Date: 2019-09-06
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the formulation point of view, due to the low hard segment content of low-hardness products, in order to meet the processing requirements, the molecular weight of general macromolecular diols is more inclined to choose 3000-4000, which makes low-hardness products often meet Not meet the processing requirements, and it is difficult to obtain better transparency, which limits the application of low hardness products

Method used

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  • Transparent fast- forming low-hardness thermoplastic polyurethane elastomer and preparation method thereof
  • Transparent fast- forming low-hardness thermoplastic polyurethane elastomer and preparation method thereof
  • Transparent fast- forming low-hardness thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A low-hardness thermoplastic polyurethane elastomer with transparent molding fast, its components include by weight: 70 parts of PBA polyester polyol (molecular weight is 1500), chain extender (R 1 , R 2 Both are 10 parts of OH) and 20 parts of toluene diisocyanate.

[0018] The performance test of the obtained thermoplastic polyurethane elastomer is shown in Table 1.

Embodiment 2

[0020] A low-hardness thermoplastic polyurethane elastomer with transparent molding fast, its components include by weight: 75 parts of PEA polyester polyol (molecular weight is 2000), chain extender (R 1 for OH, R 2 for NH 2 ) 8 parts and 17 parts of diphenylmethane diisocyanate.

[0021] The performance test of the obtained thermoplastic polyurethane elastomer is shown in Table 1.

Embodiment 3

[0023] A low-hardness thermoplastic polyurethane elastomer with transparent molding fast, its components include by weight: 75 parts of PEBA polyester polyol (molecular weight is 1000), chain extender (R 1 for OH, R 2 for NH 2 ) 6 parts and 19 parts of dicyclohexylmethane diisocyanate.

[0024] The performance test of the obtained thermoplastic polyurethane elastomer is shown in Table 1.

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Abstract

The invention belongs to the technical field of polyurethane elastomer preparation, and particularly relates to a transparent fast- forming low-hardness thermoplastic polyurethane elastomerand a preparation method thereof. According to the invention, a triptycene derivative with a special structure is adopted as a chain extender, the derivative has H connected with N atom and C connected with O atom in the structure, the structure is helpful for forming hydrogen bonds between molecular chains, is helpful for fast and orderly arrangement of hard segments, and finally the structure enables the product to have better crystallization capability. In addition, due to the large steric hindrance of the triptycene derivative, crystallization is destroyed to a certain extent, and a polyol with lowermolecular weight is used as a soft segment, so that the final product-thermoplastic polyurethane elastomer has lower hardness, better formability and good transparency.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomer preparation, and in particular relates to a low-hardness thermoplastic polyurethane elastomer with fast transparent molding and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of polyurethane that can be plasticized by heating and has no or little chemical crosslinking in chemical structure. It has high strength, high modulus, excellent wear resistance and good wear resistance in a wide hardness range. oil resistance. With the development of TPU, more and more industries have higher and higher demands for TPU with a hardness of 60A-75A, and their performance requirements are no longer simply low-end requirements such as low hardness or certain use strength. and the need for greater transparency. From the formulation point of view, due to the low hard segment content of low-hardness products, in order to meet the proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/48C08G18/42C08G18/66
CPCC08G18/3825C08G18/4238C08G18/4277C08G18/48C08G18/6651C08G18/6685
Inventor 宋红玮战振生李庆钊傅恺凡王建刚
Owner MIRACLL CHEM
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