Mixtures containing 1,1,1,3,3 pentafluorobutane

US6080799A · kind A · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Werner Kruecke · Hannover, DE
• Lothar Zipfel · Laatzen, DE

Key dates

• Filing date: Jun 16, 1999
• Grant date: Jun 27, 2000
• Expiry date: Jun 16, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K5/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Mixtures containing 50 to 99% by weight of 1,1,1,3,3-pentafluorobutane and 1 to 50% by weight of at least one fluorohydrocarbon selected from 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3,3-hexafluoropropane, and 1,1,1,2,3,3,3-heptafluoropropane. The mixtures are extremely well suited for use as foaming gases for a blowing agent to produce foamed plastic materials, particularly polyurethane foams. The mixtures are not combustible and exhibit improved insulating properties, particularly when used at low temperatures.