Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and 2-me

Details Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and 2-me Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and 2-me

Filed on

1995-03-24

Date issued

1996-07-02

Examiner

Seidleck, James J.

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Cellular products or processes of preparing a cellular...

Other Related Categories

203 67, 203 68, 252364, 252350, 521159, 521164, 521167, 521170, 521174, 510177, 510408, C08J 914, C11D 750, C23G 5024, C23G 5028

Type

Patent

Status

active

Patent number

055322832

Description

ABSTRACT:
Azeotropic compositions made up of from about 64 to about 80% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 20 to about 36% by weight of 2-methyl butane have been found to be particularly useful as blowing agents for the production of polyurethane foams.

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patent: 4900365 (1990-02-01), Lund et al.
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patent: 5035833 (1991-07-01), Ogawa et al.
patent: 5096933 (1992-03-01), Volkert
patent: 5106527 (1992-04-01), Doerge et al.
patent: 5166182 (1992-11-01), Blanpied
patent: 5227088 (1993-07-01), Swan et al.
patent: 5283003 (1994-02-01), Chen
patent: 5472989 (1995-12-01), Werner et al.
patent: 5488073 (1996-01-01), Werner et al.
Lamberts, 1,1,1,4,4,4 Hexafluorobutane, a New Non-Ozone-Depleting Blowing Agent for Rigid PUR Foams, Polyurethanes World Congress 1991-Sep. 24-26, pp. 734-739.

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