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Polyol composition for rigid polyurethane foam and process for producing rigid polyurethane foam

A technology of polyol composition and rigid polyurethane, which is applied in the field of rigid polyurethane foam polyol composition, can solve the problems of inability to obtain foam, content reduction, etc., and achieve improved vapor pressure reduction effect and reduced dimensional stability , Excellent vapor pressure reduction effect

Inactive Publication Date: 2006-03-15
SEKISUI SOFLAN WIZ CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if HFC-245fa is used as a foaming agent, containers such as gasoline tanks or petroleum tanks containing polyol compositions will have problems such as swelling especially in summer and when the plug is opened due to the gas of the foaming agent. The stock solution of the polyol composition is sprayed out or the blowing agent volatilizes and diffuses, thereby reducing its content and failing to obtain a foam with a specified density.

Method used

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Examples

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Embodiment Construction

[0029] The polyol composition for rigid polyurethane of the present invention contains at least a polyol compound, a foam stabilizer, and a catalyst in addition to a foaming agent. The polyol compound contains a polyol compound having a tertiary amino group.

[0030] The polyol compound is not limited, and known polyol compounds for rigid polyurethane foams can be used. Examples of such polyol compounds include tertiary amino group-containing polyol compounds, aliphatic polyols, aromatic polyols, and the like.

[0031] Polyol compounds containing tertiary amino groups use primary or secondary amines as initiators to make epoxides, specifically, propylene oxide (PO), ethylene oxide (EO), phenyl oxirane (SO) A polyfunctional polyol obtained by ring-opening addition polymerization of one or more of tetrahydrofuran and the like.

[0032] As the primary or secondary amine initiator of the polyol compound containing tertiary amino group, ammonia, methylamine, ethylamine and other al...

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PUM

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Abstract

The invention provides a polyurethane rigid foam polyatomic alcohol compound which uses HFC-245fa as a foaming agent and simultaneously inhibits vapor pressure of the compound and a manufacturing method for polyurethane rigid foam. In the polyurethane rigid foam polyatomic alcohol compound, compositions of the foaming agents are 1,1,1,3,3-pentafluoropropane (HFC-245fa) and the foaming agents contain acetic acid diethylene glycol monoethylether ester. The polyatomic alcohol compound of the invention comprises a polyatomic alcohol compound provided with tertiary amino groups, and weight percent of nitrogen based on the amino groups is 0.5 to 9 percent of the polyatomic alcohol compound. HFC-365mfc or HFE-254pc is preferably selected as composition of the foaming agent.

Description

technical field [0001] The present invention relates to a rigid polyurethane foam polyol composition containing 1,1,1,3,3-pentafluoropropane (HFC-245fa) as a necessary main component of a blowing agent and using HFC-245fa as a blowing agent The main component of rigid polyurethane foam manufacturing method. Background technique [0002] 1,1-Dichloro-1-fluoroethane (HCFC-141b), which has a low ozone layer destruction coefficient, is currently used as a foaming agent for rigid polyurethane foam, which is an excellent heat insulating material. Although HCFC-141b has a small ozone depletion coefficient, it is not zero. From the viewpoint of global environmental protection, it was completely abolished at the end of 2003. [0003] As blowing agents to replace HCFC-141b, low-boiling hydrocarbons such as n-pentane and cyclopentane, HFC-245fa or HFC-365mfc, which are chlorine-free low-boiling halogenated hydrocarbon compounds, and global warming HFE-254pc with smaller coefficient. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08J9/14C08L71/02C08G101/00C08G18/00
CPCC08G2101/0025C08J2375/04C08J9/146C08G18/5021C08G2110/0025C08L75/04
Inventor 安乐夏子神野昌洋城尾记生安西弘行柴沼俊
Owner SEKISUI SOFLAN WIZ CO LTD
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