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A low-hardness thermoplastic polyurethane elastomer with fast transparent molding and preparation method thereof

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

Active Publication Date: 2021-03-26
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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  • A low-hardness thermoplastic polyurethane elastomer with fast transparent molding and preparation method thereof
  • A low-hardness thermoplastic polyurethane elastomer with fast transparent molding and preparation method thereof
  • A low-hardness thermoplastic polyurethane elastomer with fast transparent molding 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 in particular relates to a low-hardness thermoplastic polyurethane elastomer with fast transparent molding and a preparation method thereof. The present invention uses triptycene derivatives with a special structure as chain extenders. The derivatives have H connected to N atoms and C connected to O atoms in the structure, which helps to form hydrogen bonds between molecular chains. It is helpful for the rapid and orderly arrangement of hard segments, and finally makes the product have better crystallization ability; in addition, due to the large steric hindrance of triptycene derivatives, the crystallization is destroyed to a certain extent, and the use of lower molecular weight Polyol is used as the soft segment, which makes the final product-thermoplastic polyurethane elastomer have 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 Patents(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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