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Composition for preparing non-yellowing soft polyurethane foam, non-yellowing soft polyurethane foam and preparation method of non-yellowing soft polyurethane foam

A technology of soft polyurethane and polyurethane prepolymer, which is applied in the field of preparation of non-yellowing soft polyurethane foam composition, which can solve problems such as insufficient reactivity and difficulty in determining the curing time, achieve excellent anti-light performance, and improve environmental stability Sex, the effect of avoiding foam collapse

Active Publication Date: 2015-10-14
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method adopts a single-step method for production, and the foaming is basically completed within 2-30 minutes, but there are defects such as insufficient reactivity, difficult to characterize or long curing time

Method used

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  • Composition for preparing non-yellowing soft polyurethane foam, non-yellowing soft polyurethane foam and preparation method of non-yellowing soft polyurethane foam

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Embodiment Construction

[0044] The following embodiments will further illustrate the method provided by the present invention, but the present invention is not limited to the listed embodiments, and should also include any other known changes within the scope of the claims of the present invention.

[0045] Preparation of Aliphatic Polyurethane Prepolymer

[0046] Polyol 1: GEP-560 (polyether polyol, Shanghai Gaoqiao Petrochemical, nominal functionality 3, OH value=56mgKOH / g, EO content about 10.0%)

[0047] Polyol 2: 330N (polyether polyol, Tianjin Sanpec, nominal functionality 3, OH value=36mgKOH / g, EO content about 16.0%, primary hydroxyl content about 75.0%)

[0048] Polyol 3: DL-2000 (polyether polyol, Dongda Bluestar, nominal functionality 2, OH value=56mgKOH / g, nominal molecular mass 2000)

[0049] Polyol 4: DL-1000 (polyether polyol, Dongda Bluestar, nominal functionality 2, OH value=112mgKOH / g, nominal molecular mass 1000)

[0050] Polyol 5: Voranol220-260 (polyether polyol, Dow company, n...

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Abstract

The invention relates to a composition for preparing non-yellowing soft polyurethane foam. The composition comprises the following components in parts by weight: 80-150 parts of aliphatic polyurethane prepolymer, 100 parts of isocyanate active mixture, 0.8-3 parts of catalyst system, 2-4 parts of water, 0.8-2 parts of surfactant and 0.5-2 parts of stabilizer. The invention also relates to a method for preparing non-yellowing soft polyurethane foam from the composition. The illumination yellowing grade of the foam prepared from the composition of non-yellowing soft polyurethane foam by the preparation method is at least the 4th grade, and the nitrogen oxide smoking resistance grade is at least the 4th grade.

Description

technical field [0001] The invention relates to a composition for preparing non-yellowing flexible polyurethane foam, non-yellowing flexible polyurethane foam and a preparation method thereof. Background technique [0002] Soft polyurethane foam is widely used in industries such as automobiles, clothing, furniture, packaging and medical treatment due to its soft feel, good elasticity, easy availability of raw materials and simple manufacturing methods, such as car seats, chest pads, shoulder pads, Shoes, mattresses, gift packaging, etc. Generally, flexible polyurethane foam is produced using aromatic polyisocyanate such as toluene diisocyanate (TDI) or diphenylmethane diisocyanate (MDI) as a main raw material. However, the foam made of aromatic polyisocyanate is prone to aging under environmental factors such as light and humidity, and the specific performance is that it is easy to turn yellow, which brings troubles to downstream users in manufacturing and use. This is mai...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/48C08G18/32C08G18/22C08G18/24C08J9/08C08G101/00
CPCC08G18/12C08G18/225C08G18/244C08G18/3206C08G18/3281C08G18/4804C08G18/6674C08G18/6681C08G18/755C08G18/758C08G2110/0008
Inventor 刘振东汪波罗永秀齐旺顺
Owner WANHUA CHEM GRP CO LTD
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