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Hard polyurethane foam material and insulator

A technology of rigid polyurethane and foam materials, which is applied in the field of rigid polyurethane foam materials and heat insulators, and can solve problems such as variation, increased gas ratio, and poor dimensional stability

Inactive Publication Date: 2004-01-21
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the poor dimensional stability at high temperature is estimated to be due to the fast reactivity, the increase of the gas ratio in the pores, and the influence of gas expansion and contraction.
[0014] Insulators studied in an attempt to reduce the above-mentioned thermal conductivity have problems such as increased density, increased deterioration of thermal conductivity over time, and poor dimensional stability, which are expected to be combined with deterioration of various characteristics.

Method used

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  • Hard polyurethane foam material and insulator
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  • Hard polyurethane foam material and insulator

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Embodiment 1 of the present invention, as the polyol component, as shown in the embodiment 1 of table 1, by polyol A40 parts, polyol B35 parts, polyol C10 parts, polyol D5 part, polyol E10 parts mixed polyhydric Alcohol composition.

[0082] Furthermore, 15 parts of cyclopentane blowing agent, 1.2 parts of water, and N,N',N"-tris(3-dimethylaminopropyl)hexahydro - 1 part of s-triazine (manufactured by Kao Corporation), 2 parts of N, N'-dimethylcyclohexylamine (manufactured by Kao Corporation), N, N, N', N', N"-pentamethyldiethylene 1 part of ethyltriamine (manufactured by Kao Corporation), and 2 parts of an organosiloxane compound (trade name: B-8462 (manufactured by Goldshyumit Co., Ltd.)) as a foam stabilizer.

[0083] In addition, as the isocyanate component, foaming was performed using 135 parts of a mixture of diphenylmethane diisocyanate polynuclear body and prepolymer-modified toluene diisocyanate. First, polyol and isocyanate were stirred, poured into an alumin...

Embodiment 2

[0087] Embodiment 2 of the present invention, as the polyol component, as shown in Example 2 of Table 1, consists of 50 parts of polyol A, 25 parts of polyol B, 7.5 parts of polyol C, 7.5 parts of polyol D and polyol E 10 parts mixed mixed polyol ingredients make up.

[0088] Furthermore, in 100 parts of the mixed polyol component, 18 parts of cyclopentane blowing agent, 0.8 part of water and N,N',N"-tris(3-dimethylaminopropyl)hexahydro -0.5 parts of s-triazine (manufactured by Kao Corporation), 2.2 parts of N,N'-dimethylcyclohexylamine (manufactured by Kao Corporation), N,N,N',N',N"-pentamethyldiethylene 1.5 parts of ethyltriamine (manufactured by Kao Corporation), and 2 parts of organosiloxane (trade name: F-392, manufactured by Shin-Etsu Chemical Co., Ltd.) as a foam stabilizer.

[0089] In addition, as isocyanate, 133 parts of diphenylmethane diisocyanate polynuclear bodies were used for foaming. The liquid temperature of the polyol and isocyanate at this time was adjust...

Embodiment 3

[0093] Example 3 of the present invention, as the polyol component, as shown in Example 3 of Table 1, is a mixture of 50 parts of polyol A, 30 parts of polyol B, 5 parts of polyol C, 5 parts of polyol D and 10 parts of polyol E Polyol composition.

[0094] Furthermore, 14 parts of cyclopentane blowing agent, 1.2 parts of water, and N,N',N"-tris(3-dimethylaminopropyl)hexahydro - 1 part of s-triazine (manufactured by Kao Corporation), 1.8 parts of N, N'-dimethylcyclohexylamine (manufactured by Kao Corporation), N, N, N', N', N"-pentamethyldiethylene 1.4 parts of ethyltriamine (manufactured by Kao Corporation), and 2 parts of organosiloxane B-8462 (manufactured by Goldshyumit Corporation) as a foam stabilizer.

[0095] In addition, as isocyanate, 133 parts of diphenylmethane diisocyanate polynuclear bodies were used for foaming. The liquid temperature of the polyol and isocyanate at this time was adjusted to 20 degreeC. First, polyol and isocyanate were stirred, poured into an...

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Abstract

Provided is a rigid polyurethane foam that achieves combination of a low heat conductivity and a low density and has a reduced deterioration with time of heat conductivity and a high dimensional stability. The rigid polyurethane foam is formed by using a polyol, an isocyanate, a mixed foaming agent of cyclopentane and water, a catalyst and a foam stabilizer. The polyol contains a polyether polyol component in which propylene oxide is added to tolylenediamines as a first polyol component, a polyether polyol component in which propylene oxide is added to triethanolamines as a second polyol component, and an aromatic polyester polyol as a third polyol component. The polyol contains the first and the second polyol components each >=6 times of the third polyol component.

Description

technical field [0001] The present invention relates to a rigid polyurethane foam material and a heat insulator, especially a rigid polyurethane foam material using a foaming agent mixed with cyclopentane and water and a heat insulator suitable for cooling devices such as refrigerators or freezers. technical background [0002] Cooling devices such as refrigerators and freezers use heat insulators filled with rigid polyurethane foam in the space between the outer and inner panels. Rigid polyurethane foam is produced by reacting a polyol component, an isocyanate component, a blowing agent, a catalyst, and a foam stabilizer. As the blowing agent, Freon and cyclopentane instead of Freon can be used. [0003] JP-A-8-193115 describes a foaming agent and a catalyst that use polyester polyols having a hydroxyl value of 300 to 600 as a polyol component of 30% by weight or more, and hydrocarbons containing water and cyclopentane of 50% by weight or more as essential components. Rig...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08G18/00C08G18/32C08G18/50C08G101/00
Inventor 荒木邦成井关崇福田克美橫仓久男
Owner HITACHI APPLIANCES INC
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