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TPU blend and use thereof

A technology of blends and elastomers, applied in applications, household appliances, cleaning equipment, etc., can solve the problems of TPU wear resistance reduction, affect the mechanical properties and wear resistance of TPU products, reduce the wear resistance of TPU, etc.

Active Publication Date: 2019-03-26
ECOVACS ROBOTICS (SUZHOU ) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the hardness of TPU decreases, the wear resistance of TPU also decreases
At the same time, the yellowing of TPU is also a difficult problem to solve. The method to solve the yellowing of TPU is generally solved by adding anti-UV aging agent, dyeing, etc., but adding solid additives to low-hardness TPU will reduce the resistance of TPU. Grinding performance
[0003] Moreover, the injection molding process of TPU will also affect the mechanical properties and wear resistance of existing TPU products.
If the moisture in the existing TPU is not dried, especially if it stays in the screw of the injection molding machine for too long, the existing TPU will decompose, the molecular weight will become smaller, and the wear resistance of the existing TPU will also be greatly improved. decline

Method used

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  • TPU blend and use thereof
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  • TPU blend and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] This embodiment provides an anti-yellowing, low-hardness and wear-resistant thermoplastic polyurethane elastomer blend. Its raw material formula is: 99.29kg TPU, 0.5kg 2-(2H-benzotriazole-2-yl)-6 -Dodecyl-4-methylphenol, 0.1kg bis(1,2,2,6,6-pentamethylpiperidinol) sebacate, 0.01kg 1,4-butanediol, 0.1kg Liquid Direct Blue. Among them, soft 45A12P of BASF Company was used as TPU, and commercially available chemical reagents were used as others.

[0076] After uniformly mixing the raw materials of the above-mentioned blend formulation, the granulated material is prepared by twin-screw extrusion. Carry out abrasion resistance test (test standard ISO4649-A) and anti-UV test (340nm, irradiance 0.89w / m2) to the prepared granulated material 2 , 24h), Shore hardness test (according to ASTM D1415 standard) and other performance tests, the measured data are wear amount 38mm 3 , Shore hardness 55A, color difference change △E=6.4.

Embodiment 2

[0078] This embodiment provides an anti-yellowing, low-hardness and wear-resistant thermoplastic polyurethane elastomer blend. Its raw material formula is: 99.74kg TPU, 0.1kg 2-(2H-benzotriazol-2-yl)-6 -Dodecyl-4-methylphenol, 0.05kg bis(1,2,2,6,6-pentamethylpiperidinol) sebacate, 0.1kg 1,4-butanediol, 0.01kg Liquid Direct Blue. Among them, soft 45A12P of BASF Company was used as TPU, and commercially available chemical reagents were used as others.

[0079] After uniformly mixing the raw materials of the above-mentioned blend formulation, the granulated material is prepared by twin-screw extrusion. Carry out abrasion resistance test (test standard ISO4649-A) and anti-UV test (340nm, irradiance 0.89w / m2) to the prepared granulated material 2 , 24h), Shore hardness test (according to ASTM D1415 standard) and other performance tests, the measured data are the wear amount of 34mm 3 , Shore hardness 57A, color difference change △E=6.1.

Embodiment 3

[0081] This embodiment provides an anti-yellowing, low-hardness and wear-resistant thermoplastic polyurethane elastomer blend. Its raw material formula is: 98.8kg TPU, 0.5kg 2-(2H-benzotriazol-2-yl)-6 - Dodecyl-4-methylphenol, 0.1kg bis(1,2,2,6,6-pentamethylpiperidinol) sebacate, 0.1kg blowing agent AC, 0.5kg liquid direct blue . Among them, WHT-1570IC from Yantai Wanhua Company was used for TPU, and commercially available chemical reagents were used for others.

[0082] After uniformly mixing the raw materials of the above-mentioned blend formulation, the granulated material is prepared by twin-screw extrusion. Carry out abrasion resistance test (test standard ISO4649-A) and anti-UV test (340nm, irradiance 0.89w / m2) to the prepared granulated material 2 , 24h), Shore hardness test (according to ASTM D1415 standard) and other performance tests, the measured data are wear amount 39mm 3 , Shore hardness 53A, change △E=5.8.

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Abstract

The invention relates to a thermoplastic polyurethane elastomer blend and use thereof in the preparation of caterpillar bands. By utilizing a liquid anti-UV agent, a liquid heat stabilizer and at least one of a liquid direct dye and a hardness regulator (being selected from one of a chain extender or a cross-linking agent and a foaming agent), the blend has good yellowing resistance and wear resistance and low hardness.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a thermoplastic polyurethane elastomer (TPU) blend and its application, in particular to an anti-yellowing, low hardness, wear-resistant thermoplastic polyurethane elastomer blend and its application. Background technique [0002] The inner ring of the track of some window cleaning robots on the market is made of harder thermoplastic elastomer, and the outer ring is made of lower hardness thermoplastic elastomer. It is processed by two-color injection molding or insert injection molding. The wear-resistant low-hardness thermoplastic elastomer usually adopts low-hardness TPU (Thermoplastic polyurethanes). However, as the hardness of TPU decreases, the wear resistance of TPU also decreases. At the same time, the yellowing of TPU is also a difficult problem to solve. The method to solve the yellowing of TPU is generally solved by adding anti-UV aging agent, dyeing, etc., but adding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K5/3475C08K5/3435C08K5/053C08J9/10
CPCC08J9/103C08J2375/04C08K5/053C08K5/3435C08K5/3475C08L75/04A47L1/02B62D55/18B62D55/24C08J9/10C08L75/06C08L75/08
Inventor 栾福进
Owner ECOVACS ROBOTICS (SUZHOU ) CO LTD
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