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All-water polyurethane self-skinning foam composition

A technology of polyurethane and composition, applied in the field of polyurethane foam, can solve the problems of difficulty in forming a skin layer, easy shrinkage, poor wear resistance, etc.

Inactive Publication Date: 2017-03-22
苏州库凌科高分子新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are foaming agents on the market that use water as polyurethane self-skinning foaming products, compared with HCFC-141b, there are problems such as difficulty in forming a skin layer (thin skin layer), poor wear resistance, and easy shrinkage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The product formula is as follows: 100 parts of A component: 30 parts of B component.

[0017] First, weigh 50 parts of polyoxypropylene glycol PPG with a primary hydroxyl group and a low unsaturation hydroxyl value of 33-37 mgKOH / g, and use glycerol as an initiator with a hydroxyl value of 21-27 mgKOH / g. 50 parts of propane ethylene oxide copolyether, 3 parts of crosslinking agent ethylene glycol; 0.2 parts of water, 1.5 parts of the mixture of catalyst LE-310 and catalyst NE-1070, 0.2 parts of surfactant, 2 parts of color paste, light stable 1.5 parts of agent, 0.5 parts of nano-silicon carbide. Thus, the above raw materials are uniformly mixed to form A component, and the modified MDI isocyanate is used as B component. After component A and component B are mixed, use a low-pressure foaming machine to control the material temperature at 25-30°C, the mold temperature at 35-45°C, and pour.

Embodiment 2

[0019] The product formula is as follows: 100 parts of component A: 35 parts of component B.

[0020] First, weigh 60 parts of polyoxypropylene glycol PPG with a primary hydroxyl group and a low unsaturation hydroxyl value of 33-37 mgKOH / g, and use glycerol as an initiator with a hydroxyl value of 21-27 mgKOH / g. 40 parts of propane ethylene oxide copolyether, 5 parts of crosslinking agent ethylene glycol; 0.2 parts of water, 1.5 parts of the mixture of catalyst LE-310 and catalyst NE-1070, 0.2 parts of surfactant, 2 parts of color paste, light stable 1.5 parts of agent, 0.5 parts of nano-silicon carbide. Thus, the above raw materials are mixed uniformly to form A component, and the modified MDI isocyanate is used as the B component. After component A and component B are mixed, use a low-pressure foaming machine to control the material temperature at 25-30°C, the mold temperature at 35-45°C, and pour.

Embodiment 3

[0022] The product formula is as follows: 100 parts of component A: 45 parts of component B.

[0023] First, weigh 70 parts of polyoxypropylene glycol PPG with a primary hydroxyl group and a low unsaturation hydroxyl value of 33-37 mgKOH / g, and use glycerol as an initiator with a hydroxyl value of 21-27 mgKOH / g. 30 parts of propane ethylene oxide copolyether, 8 parts of crosslinking agent ethylene glycol; 0.2 parts of water, 1.5 parts of the mixture of catalyst LE-310 and catalyst NE-1070, 0.2 parts of surfactant, 2 parts of color paste, light stable 1.5 parts of agent, 0.5 parts of nano-silicon carbide. Thus, the above raw materials are mixed uniformly to form A component, and the modified MDI isocyanate is used as the B component. After component A and component B are mixed, use a low-pressure foaming machine to control the material temperature at 25-30°C, the mold temperature at 35-45°C, and pour.

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PUM

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Abstract

Provided is an all-water polyurethane self-skinning foam composition. The all-water polyurethane self-skinning foam composition is applied to armrests of treadmills, guard railings of highways, backrests of treatment facilities, and the like, and is composed of, by weight, 100 parts of combined polyether and 30-45 parts of isocyanate. The combined polyether mainly contains polypropylene oxide glycol with a low degree of unsaturation and with the hydroxyl value being 33-37 mgKOH / g, propylene oxide-ethylene oxide copolyether with the hydroxyl value being 21-27 mgKOH / g, a cross-linking agent, water, a catalyst, a surface active agent, a light stabilizer and nano-scale silicon carbide, wherein the cross-linking agent comprises at least two hydrogen atoms which can react with isocyanate, and the molecular weight of the cross-linking agent is 60-200. The all-water polyurethane self-skinning foam composition has excellent compression resistance and collision resistance, is wide in range of abrasion resistance, oil resistance and hardness and high in strength and elongation, and achieves shock absorption. The all-water polyurethane self-skinning foam composition can pass the standard ISO10993-5-2009 in-vitro cell toxicity test.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to a polyurethane all-water self-skinning foam composition, which is mainly used for highway guardrails and health equipment. Background technique [0002] According to the agreement reached at the 19th Conference of the Parties to the Montreal Protocol, developing countries should freeze the production and consumption of HCFCs at the average level of 2009 and 2010 in 2013, reduce by 10% by 2015, and cut by 35% by 2020. 67.5% reduction in 2025, and all HCFCs series products except for special purposes will be phased out in 2030. Currently, the controlled HCFCs produced and used in China include: HCFC-22, HCFC-123, HCFC-124, HCFC-141b and HCFC-142b, among which more than 90% of polyurethane integral skin foaming products on the market use HCFC-141b As a blowing agent. Although there are foaming agents using water as polyurethane self-skinning foaming products on the marke...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/32C08G18/66C08K3/34C08G101/00
CPCC08G18/4825C08G18/3206C08G18/4812C08G18/4837C08G18/6674C08G2101/00C08K3/34C08K2201/011
Inventor 张剑
Owner 苏州库凌科高分子新材料有限公司
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