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Polyurethane soft foam

A polyurethane foam, soft technology, applied in the field of car seat cushions/back cushions, can solve the problems of increased foam hardness and closed cell ratio

Inactive Publication Date: 2020-01-03
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the dosage of these small molecule amino chain extenders / crosslinkers increases, the hardness and closed cell ratio of the foam will increase significantly.

Method used

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  • Polyurethane soft foam
  • Polyurethane soft foam
  • Polyurethane soft foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] The test methods of the embodiments are described as follows:

[0129] The shortest demolding time: refers to the shortest time from the time the polyurethane reaction system is introduced into the mold to the time it can be fully demolded after foaming. The basis of the judgment is that the surface of the foam block is smooth and complete without indentation after being demolded from the metal square mold;

[0130] TVOC volatilization: The free foam block made in a clean foaming cup, after being fully cured, is immediately wrapped tightly with food-grade tin foil and food-grade PP film, and sent to a third-party testing agency the next day according to the test standard ISO12219-2: 2012 detects TVOC.

[0131] Material 1-CHE-330N high activity polyether polyol Mw=5000, f=3, hydroxyl value 33.5mgKOH / g, Jiangsu Changhua Polyurethane Technology Co., Ltd.

[0132] Raw material 2-CHP-H45 polymer polyol Mw=7800, f=3, hydroxyl value 21.5mgKOH / g, Jiangsu Changhua Polyurethane Technolo...

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PUM

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Abstract

The invention relates to a method for preparing soft high-resilience polyurethane foam, the soft high-resilience polyurethane foam prepared by the method and use of the foam in the aspect of automobile chair cushions / back cushions. The soft high-resilience polyurethane foam is prepared from a reaction system comprising ingredients such as isocyanate, polyol, at least one amino terminated long-chain chain extender, a foamer and a catalyst. A polyurethane reaction system of the foam is high in aging speed and short in demolding time, and the obtained foam is good in elasticity and high in degreeof comfort and also has satisfactory low odor.

Description

Technical field [0001] The present invention relates to a method for preparing soft high-resilience polyurethane foam, the polyurethane foam prepared by the method, and the use of the soft high-resilience polyurethane foam in car seat cushions / back cushions. Background technique [0002] It is well known in the industry that soft high-resilience polyurethane foam is widely used in sofas, pillows, car interiors, car seat cushions, cushions, etc. However, with the rapid economic development, people's requirements for the comfort of automobiles and furniture are increasing. Today, while there are higher standards for the physical properties of polyurethane products, the automotive industry generally requires polyurethane products with lower volatile organic compound (VOC), low fogging and low odor. However, due to the need to use amine catalysts in the production process of polyurethane foam, and the current better performance of amine catalysts such as bis(dimethylaminoethyl) ethe...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/48C08G18/76C08G18/79C08G18/66
CPCC08G18/7671C08G18/7614C08G18/794C08G18/4816C08G18/482C08G18/3275C08G18/3281C08G18/6688C08G2110/0083C08G2110/0008C08G18/7664C08G18/7621C08G18/7607C08G18/4841C08G18/5024C08G18/3228C08G18/3278C08G18/6681C08G18/632C08G18/4072C08G2350/00C08G18/18C08G2110/0058
Inventor 童俊
Owner COVESTRO DEUTSCHLAND AG
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