Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1989-05-10
1990-07-31
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
25218215, 25218224, C08G 1814
Patent
active
049451197
ABSTRACT:
This invention relates to rigid closed-celled polyisocyanate-based foams exhibiting improved dimensional stability and a process for their preparation. In particular, it relates to foams containing within their cells, when initially prepared, a gas mixture comprising theoretically from about 5 to 70 mole percent carbon dioxide and from about 40 to about 95 mole percent of an organic compound mixture.
The organic compound mixture itself, comprises (a) from 40 to 95 mole percent of an organic compound having a boiling point greater than or equal to about 283K, and (b) from 5 to 60 mole percent of an organic compound having a boiling point equal to or less than about 266K. Halocarbons are the preferred organic compounds for components (a) and (b).
REFERENCES:
patent: 3391093 (1968-07-01), Frost
patent: 3745203 (1973-07-01), Harper
patent: 4055521 (1977-10-01), Taub et al.
patent: 4177332 (1979-12-01), Mitschke et al.
patent: 4636529 (1987-01-01), Crooker
Derwent Abstract of J 63-265,936-A (88-356,376/50).
Derwent Abstract of J 60-212,481-A (85-306,755/49).
Grunbauer Henri J. M.
Smits Guide F.
The Dow Chemical Company
Welsh Maurice J.
LandOfFree
Foaming system for rigid urethane and isocyanurate foams does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Foaming system for rigid urethane and isocyanurate foams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foaming system for rigid urethane and isocyanurate foams will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1399097