Halogen-free blowing agents that include cycloaliphatic hydrocar

Details Halogen-free blowing agents that include cycloaliphatic hydrocar Halogen-free blowing agents that include cycloaliphatic hydrocar

1993-12-10

1994-08-09

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521114, 521130, 521131, C08G 1814

Patent

active

053366964

ABSTRACT:
A halogen-free blowing agent is used to produce isocyanate-based polymeric foams. The blowing agent is an organic liquid which is free from halogens and contains a positive binary azeotrope having a minimum boiling temperature in the range of about 15.degree. C. to about 80.degree. C. at normal atmospheric pressure. Particularly preferred is a binary azeotrope of an alicyclic hydrocarbon such as cyclopentane or cyclohexane and methyl formate.
The halogen-free blowing agents contemplated herein provide the following advantages: no ozone depletion potential, no global warming potential, direct replacement in foam formulations for trichloromonofluoromethane (CFC-11), relatively higher blowing action, relatively lower foam density, relatively lower thermal conductivity, better compatibility, and relatively lower materials cost.

REFERENCES:
patent: Re30676 (1981-07-01), Mori et al.
patent: 3558531 (1971-01-01), Salyer et al.
patent: 3625872 (1971-12-01), Ashida
patent: 3793236 (1974-02-01), Ashida et al.
patent: 3879315 (1975-04-01), Watkinson et al.
patent: 4055521 (1977-10-01), Taub et al.
patent: 4898893 (1990-02-01), Ashida
patent: 5057547 (1991-10-01), Doerge
patent: 5079271 (1992-01-01), Gillis
patent: 5091436 (1992-02-01), Frisch et al.
patent: 5102920 (1992-04-01), Doerge et al.
patent: 5120770 (1992-06-01), Doyle et al.
patent: 5166182 (1992-11-01), Blanpied
patent: 5283003 (1994-02-01), Chen
Kam, Chem. Eng. Science 48 (12)2307-2312 (1993).
Doerge et al., 33rd Annual Polyurethane Technical/Marketing Conference, Sep. 30-Oct. 3, 1990, pp. 82-89.
Heilig et al., Proceedings of International Polyurethane Forum, Nagoya, Japan, May 10-12, 1993, pp. 197-201.

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