Hard polyurethane foam and premixed dolichol for manufacturing the same

A rigid polyurethane and foam technology, applied in the field of pre-mixed polyols, can solve the problems of increased power consumption, reduced cell pressure, poor refrigerator insulation, etc., and achieves excellent thermal insulation and dimensional stability, and appropriate reactivity. , the effect of excellent thermal insulation

Active Publication Date: 2013-10-30
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In such a situation, in the conventional formulation using cyclopentane as a blowing agent, the fluidity of the urethane foam raw material is poor, and the urethane foam cannot be fully filled in the narrow part of the heat-insulating box.
If there is a space that is not filled with urethane foam, the insulation of the refrigerator will deteriorate, which may increase power consumption
[0006] In addition, the saturated vapor pressure of the rigid urethane foam foamed with cyclopentane is lower than that of conventional blowing agents, so the pressure in the cells is also reduced, and the rigid urethane foam The body is prone to shrinkage, that is, there is a problem that dimensional stability may deteriorate

Method used

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  • Hard polyurethane foam and premixed dolichol for manufacturing the same
  • Hard polyurethane foam and premixed dolichol for manufacturing the same
  • Hard polyurethane foam and premixed dolichol for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Hereinafter, for Sample 1, the preparation method and the measurement method of the physical property values ​​will be described.

[0122] (1) Production of sample 1

[0123]Use 50 parts of pentaerythritol (polyol A) added with propylene oxide and ethylene oxide (parts by weight, the same below), 20 parts of triethanolamine-based polyol (polyol D), and 20 parts of glycerin-based polyol (polyol E) 100 parts of mixed polyols with 10 parts of toluene diamine (polyol F), using 1.6 parts of water, 18.3 parts of cyclopentane, bis(dimethylaminoethyl) ether, triethylenediamine, N,N' , N"-tris(3-diethylaminopropyl) hexahydro-s-triazine 3.0 parts, foam stabilizer 2.5 parts pre-mixed polyol and polymethylene polyphenyl diisocyanate, adjust the pre-mixed Alcohol composition, so that the IR intensity of the resulting rigid polyurethane (1700 ~ 1720cm -1 The peak A1 derived from the urethane bond and the 1590-1610cm -1 The peak A2) A1 / A2 derived from the urea bond is about 1.9, us...

Embodiment 2

[0154] (1) Production of sample 5

[0155]Use 50 parts of pentaerythritol (polyol A) added with propylene oxide and ethylene oxide (parts by weight, the same below), 20 parts of triethanolamine-based polyol (polyol D), and 20 parts of glycerin-based polyol (polyol E) 100 parts by weight of mixed polyols of 10 parts of toluene diamine (polyol F), using 1.65 parts of water, 17.3 parts of cyclopentane, bis(dimethylaminoethyl) ether, triethylenediamine, N,N ', N"- Tris(3-diethylaminopropyl) hexahydro-s-triazine 3.0 parts, foam stabilizer 2.5 parts pre-mixed polyol and polymethylene polyphenyl diisocyanate, adjusted pre-mixed Polyol composition, so that the IR intensity of the obtained rigid polyurethane (1700 ~ 1720cm -1 The peak A1 derived from the urethane bond and the 1590-1610cm -1 The peak A2) A1 / A2 derived from the urea bond is about 1.8, making a refrigerator door. A refrigerator was formed using the refrigerator box formed of Sample 2 and the refrigerator door of Sample...

Embodiment 3

[0159] (1) Production of sample 8

[0160] Use 50 parts of pentaerythritol (polyol A) added with propylene oxide and ethylene oxide (parts by weight, the same below), 20 parts of triethanolamine-based polyol (polyol D), and 20 parts of glycerin-based polyol (polyol E) 100 parts by weight of mixed polyols of 10 parts of toluene diamine (polyol F), using 1.7 parts of water, 16.3 parts of cyclopentane, bis(dimethylaminoethyl) ether, triethylenediamine, N,N ', N"- Tris(3-diethylaminopropyl) hexahydro-s-triazine 3.0 parts, foam stabilizer 2.5 parts pre-mixed polyol and polymethylene polyphenyl diisocyanate, adjusted pre-mixed Polyol composition, so that the IR intensity of the obtained rigid polyurethane (1700 ~ 1720cm -1 The peak A1 derived from the urethane bond and the 1590-1610cm -1 The peak A2) A1 / A2 derived from the urea bond is about 1.7, making a refrigerator door. A refrigerator was formed using the refrigerator box formed of Sample 2 and the refrigerator door of Sample...

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Abstract

The present invention provides a hard polyurethane foam and a premixed dolichol for manufacturing the same. The invention aims to improve mobility of carbamate raw material (premixed dolichol) and adjust the reactivity. The hard polyurethane foam is sufficiently filled into a heat insulation door of a refrigerator and narrow parts in a box, thereby improving heat insulation performance of the heat insulation door and the box of the refrigerator, and reducing shrinkage of the formed carbamate foam under low temperature. The method for settling the task of the invention is providing the hard polyurethane foam which utilizes the premixed dilichol and polymethylene diisocyanate, wherein the premixed dilichol comprises dilichol, catalyst, water, cyclopentane and foam stabilizer. 30-80% by weight of the dolichol is a behnyl alcohol with 4-8 active hydrogen groups and/or a polyol compound with added oxyalkylene on polyamine. When the absorption spectrum peak intensity of 1700-1720cm<-1> infrared ray of the hard polyurethane foam is represented by A1, and the absorption spectrum peak intensity of 1590-1610cm<-1> infrared ray is represented by A2, a ratio A1/A2 is 1.7-2.0.

Description

technical field [0001] The present invention relates to rigid polyurethane foam and premixed polyols for the manufacture of rigid polyurethane foam. Background technique [0002] Conventionally, a heat insulator of a refrigerator is formed by filling a space between an outer case and an inner case with a rigid urethane foam having air cells. Rigid urethane foam is formed by reacting a premixed polyol comprising a polyol component, catalyst, blowing agent, and foam stabilizer with an isocyanate component. Hitherto, urethane foams used as insulation materials for refrigerators have used trichloromonofluoromethane and hydrochlorofluorocarbons (HCFCs), which have low gas thermal conductivity, are refractory chlorofluorocarbons (CFCs), and As a blowing agent, when these CFCs and HCFCs are discharged into the atmosphere, the temperature of the earth's surface will rise due to the destruction of the ozone layer in the stratosphere and the greenhouse effect. Recently, cyclopentane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08J9/14C08L75/08C08G101/00
CPCC08G18/10C08G18/3206C08G18/3271C08G18/73C08J9/141C08J2375/04C08L75/04
Inventor 北条房郎梶原百合井关崇荒木邦成古桥正良香川博之
Owner HITACHI APPLIANCES INC
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