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Method for preparing no-yellowing polyurethane sponge capable of being foamed at normal temperature

A technology of polyurethane sponge at normal temperature, which is applied in the field of preparing non-yellowing polyurethane sponge, which can solve the problems of easy aging of aromatic polyurethane sponge, unstable product quality, poor light resistance, etc., achieve excellent environmental tolerance, and is not easy to yellow , Excellent anti-aging effect

Inactive Publication Date: 2016-03-16
CHANGZHOU SHUNXIANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of preparation method of non-yellowing polyurethane sponge that can be foamed at normal temperature, to solve the problem that the aromatic polyurethane sponge obtained in the prior art is easy to age, oxidize, have poor light resistance and other IPDI polyurethane sponges need to be heated and foamed , low reactivity and unstable product quality

Method used

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  • Method for preparing no-yellowing polyurethane sponge capable of being foamed at normal temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The non-yellowing polyurethane sponge that can be foamed at room temperature is prepared by one-step method, and consists of the following raw materials in parts by weight:

[0064] Polyether polyol GEP-560100 parts

[0065] 60 parts of 4,4′-dicyclohexylmethane diisocyanate (HMDI)

[0066] 4 parts water

[0067] Momentive L-580 (silicone oil) 1.5 parts

[0068] Triethylenediamine (basic catalyst) 0.8 part

[0069] Organic bismuth (metal catalyst) 0.3 parts

[0070] Dichloromethane MC (physical blowing agent) 6 parts

[0071] Triethanolamine (crosslinking agent) 1.3 parts.

[0072] According to the above formula, according to the size of the manual foam curing mold, first weigh 700g GEP-560 polyether polyol, 28g water, 10.5gL-580 silicone oil, 5.6g triethylenediamine, 2.1g organic bismuth, 42g dichloromethane and 9.1 Put 1 g of triethanolamine into the mixer for high-speed stirring, the rotating speed is 200r / min, the stirring time is 70s, and the mixture is evenly...

Embodiment 2

[0090] The non-yellowing polyurethane sponge that can be foamed at room temperature is prepared by prepolymer method, and consists of the following raw materials in parts by weight:

[0091] Polyether polyol ACCLAIM8220N100 parts

[0092] 70 parts of 4,4'-dicyclohexylmethane diisocyanate prepolymer

[0093] 3 parts water

[0094] Evonik B-8715 (silicone oil) 1 part

[0095] Triethylenediamine (basic catalyst) 0.6 part

[0096] Titanium acetylacetonate (metal catalyst) 0.7 parts

[0097] Liquid carbon dioxide (physical blowing agent) 7 parts

[0098] 1 part of 1,4-butanediol (crosslinking agent)

[0099] according to n (NCO) :n (OH) =1.3:1 molar ratio, pre-reacted to obtain 4,4'-dicyclohexylmethane diisocyanate prepolymer.

[0100] According to the formula of the above-mentioned non-yellowing sponge, according to the size of the manual foam curing mold, weigh 700g ACCLAIM8220N polyether polyol, 21g water, 7gB-8715 silicone oil, 4.2g triethylenediamine, 4.9g titanium ace...

Embodiment 3

[0103] The one-step method prepares the flame-retardant non-yellowing polyurethane sponge that can be foamed at room temperature, and consists of the following raw materials in parts by weight:

[0104] Polyether polyol NJ-330D100 parts

[0105] 70 parts of 4,4′-dicyclohexylmethane diisocyanate (HMDI)

[0106] 5 parts water

[0107] Air DC-6070 (silicone oil) 2 parts

[0108] Dimethylcyclohexylamine (basic catalyst) 1 part

[0109] Organic zinc (metal catalyst) 0.4 parts

[0110] Dichloroethane (physical blowing agent) 6 parts

[0111] Glycerol (crosslinking agent) 1.4 parts

[0112] If non-yellowing sponge products need to have certain flame retardancy, flame retardants can be added to the formula or flame-retardant polyether can be used to improve its flame-retardant effect.

[0113] According to the formula of the above non-yellowing sponge, according to the size of the manual foam curing mold, first weigh 700g NJ-330D flame-retardant polyether polyol, 35g water, 14gD...

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Abstract

The invention discloses a method for preparing no-yellowing polyurethane sponge capable of being foamed at normal temperature. 4,4'-dicyclohexylmethane diisocyanate or a prepolymer thereof and polyether polyol serve as main raw materials; an environment-friendly catalyst and other auxiliary materials are added, the reaction and foaming are performed through a conventional polyurethane sponge production line at normal temperature, and the no-yellowing polyurethane sponge is obtained through a curing stage. The no-yellowing sponge can be obtained through the conventional polyurethane sponge production line at normal temperature, the raw materials do not need to be heated, existing equipment does not need to be modified, and the method has the advantages of small equipment investment and low energy consumption. In addition, since 4,4'-dicyclohexylmethane diisocyanate does not contain a benzene ring structure, obtained polyurethane sponge does not yellow, is excellent in aging resistance, oxidization resistance and illumination resistance and can be widely applied to the fields of shoe materials, furniture, electronics, printing supplies, aviation, automobiles, medical beauty, packaging, sports goods and articles for daily use.

Description

technical field [0001] The invention relates to the technical field of polyurethane sponge foaming, in particular to a non-yellowing foaming preparation using polyether polyol, 4,4'-dicyclohexylmethane diisocyanate or its prepolymer as main raw materials at room temperature. Polyurethane sponge method. Background technique [0002] Polyurethane sponge is a kind of polyurethane foam, which belongs to soft polyurethane foam. Because of its porous honeycomb structure, it has a series of superior properties such as light weight, excellent softness, elasticity and good water resistance. It is widely used. It is extensive and involves many industries, including: clothing, furniture, aviation, automobiles, packaging, sports and daily necessities, etc., and its scale is still expanding; so far, most domestic sponge manufacturers still use toluene diisocyanate (TDI ) or diphenylmethane diisocyanate (MDI) as raw material to produce polyurethane sponge, because the isocyanate group in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/32C08G18/10C08G18/18C08G18/22C08J9/08C08J9/12C08J9/14C08G101/00
CPCC08G18/758C08G18/10C08G18/163C08G18/1808C08G18/1816C08G18/222C08G18/225C08G18/227C08G18/3281C08G18/48C08G18/6677C08G18/6688C08G2101/00C08J9/08C08J9/122C08J9/141C08J9/145C08J2203/02C08J2203/06C08J2203/14C08J2203/142C08J2203/184C08J2375/08
Inventor 顾飚巢雄飞夏洋
Owner CHANGZHOU SHUNXIANG NEW MATERIAL TECH CO LTD
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