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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 such as content reduction and inability to obtain foam, achieve reduction in dimensional stability, and improve the effect of reducing vapor pressure , the effect of excellent vapor pressure reduction effect

Inactive Publication Date: 2007-03-28
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 the blowing 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 polyol compounds containing tertiary amino groups, aliphatic polyols, and aromatic polyols.

[0031] Polyol compounds containing tertiary amino groups use primary or secondary amines as initiators to epoxide, specifically, propylene oxide (PO), ethylene oxide (EO), and phenylethylene oxide (SO) , Tetrahydrofuran, etc., a polyfunctional polyol obtained by ring-opening addition polymerization of one or more types.

[0032] As the primary or secondary amine initiators of the tertiary amino group-containing polyol compound initiators, aliphatic primary amines such as ammonia, m...

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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 the essential main component of the foaming agent and the use of HFC-245fa as the foaming agent The main component of rigid polyurethane foam manufacturing method. Background technique [0002] As a blowing agent for rigid polyurethane foam, which is an excellent thermal insulation material, 1,1-dichloro-1-fluoroethane (HCFC-141b), which has a low ozone layer destruction coefficient, is currently used. Although HCFC-141b has a low 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 a blowing agent to replace HCFC-141b, low-boiling hydrocarbons such as n-pentane or cyclopentane, HFC-245fa or HFC-365mfc as low-boiling halogenated hydrocarbon compounds that do not contain chlorine, and global warming are being studied. HFE-...

Claims

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Application Information

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Patent Type & Authority Patents(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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