US 2001/0036974 A1 · Blowing agent blends

Abstract

Foam blowing agents blends of 5-50 mole % HCFC-22 and 95-50 mole % of n-pentane, i-pentane and/or cyclopentane are provided, as are polyol premixes and polyurethane foam compositi ons containing such blends.

Claims9

Dependent claims

A foam blowing agent composition comprising

(a) about 5 to 50 mole % of chlorodifluoromethane and
(b) about 95 to 50 mole % of a pentane selected from the group consisting of one or more of n-pentane, i-pentane and cyclopentane.

Dependencies are inferred from the claim text.

Facts

Application

09/788,708Filed 20 Feb 2001

Priority

15 Mar 2000

Published

1 Nov 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08J 9/149
Organic: mixtures of blowing agents covered by more than one of the groups C08J9/141 - C08J9/143
C08J 2203/14
Foams characterized by the expanding agent: saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
C08J 2203/142
Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons: halogenated saturated hydrocarbons, e.g. H3C-CF3
C08J 2375/04
Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers: polyurethanes

Abstract

Claims9

Dependent claims

A foam blowing agent composition comprising

(a) about 5 to 50 mole % of chlorodifluoromethane and
(b) about 95 to 50 mole % of a pentane selected from the group consisting of one or more of n-pentane, i-pentane and cyclopentane.

Dependencies are inferred from the claim text.

Blowing agent blends

Life of this patent

Abstract

Claims9

Blowing agent blends

Life of this patent

Abstract

Claims9