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Combined polyether, polyurethane raw material composition, foam, preparation method and application

A technology of raw material composition and combined polyether, which is applied in the field of polyurethane raw material composition and combined polyether, can solve problems such as rough nozzles of solar water heaters, high greenhouse effect value, and low shrinkage resistance, and achieve good fluidity and greenhouse Low effect value and good dimensional stability

Active Publication Date: 2017-12-26
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the destructive effect of the blowing agent used in the prior art on the ozone layer, the high greenhouse effect value, and the large amount of combined polyether used in the production of solar water heaters, and the prepared solar water heater has rough holes and many holes, and is resistant to shrinkage. In order to solve the defect of low resistance, a combination polyether, polyurethane raw material composition, foam and preparation method and application are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of environment-friendly polyurethane composite polyether

[0035] The combined polyether includes the following components in parts by weight: polyether polyol YD-105060 parts, polyether polyol NJ620925 parts, polyester polyol CF-632015 parts, foam stabilizer L-68631.5 parts, composite catalyst 1 part , 1.7 parts of deionized water, 17 parts of 1,1-dichloro-2,2-difluoroethylene. Wherein, the composite catalyst is composed of dimethylbenzylamine, N,N-dimethylcyclohexylamine and bis(2-dimethylaminoethyl) ether according to the mass ratio of (1:0.9:0.3) made.

[0036] Stir and mix the above-mentioned components according to their parts by weight at room temperature, and then discharge.

[0037] (2) Preparation of rigid polyurethane foam

[0038]Mix the above combined polyether and isocyanate PM-200 in a weight ratio of 1:1 in a high-pressure foaming agent, foam and shape it in a mold. Wherein, the foaming temperature is 18° C., and the pressure of the f...

Embodiment 2

[0040] (1) Preparation of environment-friendly polyurethane composite polyether

[0041] The combined polyether includes the following components in parts by weight: polyether polyol DD-38040 parts, polyether polyol NJ6209 and polyether polyol YD-8310 in a mass ratio of 1:1, a total of 55 parts, polyether polyol Ester polyol PS31525 parts, foam stabilizer L-68632 parts, composite catalyst 2.5 parts, deionized water 1.0 parts, 1,1-dichloro-2,2-difluoroethylene 20 parts. Wherein, the composite catalyst is composed of dimethylbenzylamine, N,N-dimethylcyclohexylamine and bis(2-dimethylaminoethyl) ether according to the mass ratio of (1:0.9:0.3) made.

[0042] Stir and mix the above-mentioned components according to their parts by weight at room temperature, and then discharge.

[0043] (2) Preparation of rigid polyurethane foam

[0044] Mix the above combined polyether and isocyanate PM-200 in a weight ratio of 10:11 in a high-pressure foaming agent, foam and mold in a mold. W...

Embodiment 3

[0046] (1) Preparation of environment-friendly polyurethane composite polyether

[0047] The combined polyether includes the following components in parts by weight: polyether polyol 823850 parts, polyether polyol YD-8310 and polyether polyol YD-6205 according to the mass ratio of 1:1, a total of 40 parts, polyether polyol YD-6205 Ester polyol PS315210 parts, foam stabilizer L-68633 parts, composite catalyst 1.7 parts, deionized water 1.3 parts, 1,1-dichloro-2,2-difluoroethylene 19 parts. Wherein, the composite catalyst is composed of dimethylbenzylamine, N,N-dimethylcyclohexylamine and pentamethyldiethylenetriamine according to the mass ratio (1:1:0.2) .

[0048] Stir and mix the above-mentioned components according to their parts by weight at room temperature, and then discharge.

[0049] (2) Preparation of rigid polyurethane foam

[0050] Mix the above combined polyether and isocyanate PM-200 in a weight ratio of 1:1.05 in a high-pressure foaming agent, foam and shape it...

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Abstract

The invention discloses a premixed polyether, a polyurethane raw material composition, foam and a preparation method and an application of the premixed polyether. The premixed polyether comprises the following components in parts by weight: 100 parts of polyhydric alcohol, 1.5-2.5 parts of a foam stabilizer, 1-2.5 parts of a catalyst, 1.0-1.7 parts of a chemical foaming agent and 17-20 parts of 1,1-dichloro-2,2-polyvinylidene floride, wherein the polyhydric alcohol is a mixture of 30-60 parts of polyether polyol A, 25-55 parts of polyether polyol B and 5-15 parts of polyether polyol. The premixed polyether disclosed by the invention is free of damage to an ozone layer, low in greenhouse effect value, good in mobility when being foamed, high in foaming ratio, relatively low in viscosity, and low in amount; compared with an HCFC-141b foaming system, the used material is reduced by about 10% under the same condition; the cost is reduced; the foam is good in dimensional stability, high in compressive strength; and repaired pipe openings are relatively few.

Description

technical field [0001] The invention relates to a combined polyether, polyurethane raw material composition, foam, preparation method and application. Background technique [0002] According to relevant environmental protection standards and requirements, my country's substitution of polyurethane foaming agents has also entered a new period. Since 2015, my country has also adopted corresponding restrictions on the application of HCFC-141b. [0003] At present, the physical foaming agent used in solar water heaters is mainly HCFC-141b. HCFC-141b is a transitional alternative foaming agent containing chlorine ions that destroy the ozone layer and have a high greenhouse effect value. The nozzle of the solar water heater prepared by using the foaming agent is often repaired, the cavity is serious, the product quality is poor, the amount of combined polyether is large, and the production efficiency is low. Due to the limitation of the production process of the solar water heater,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/42C08J9/14C08J9/08F24J2/46C08G101/00
CPCC08G18/4018C08G18/42C08G18/4804C08J9/144C08J2203/02C08J2203/162C08J2203/184C08J2205/10C08J2375/06C08J2375/08C08G2110/0025F24S80/00Y02E10/40
Inventor 徐军许凤华于楠信延垒
Owner SHANGHAI DONGDA CHEM