Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1997-06-12
1998-08-04
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521172, C08G 1842
Patent
active
057894582
ABSTRACT:
Closed cell, rigid polymer foams are prepared by (a) continuously conveying a carrier along a production line, (b) supplying on the carrier a foam-forming mixture comprising a polyisocyanate, a catalyst, a hydrogen-containing blowing agent or a mixture of the hydrogen-containing blowing agent and at least one co-blowing agent, and an isocyanate-reactive component comprising (i) a high acid polyester polyol having an acid number greater than 1, or (ii) a mixture of the high acid polyester polyol and at least one other isocyanate-reactive compound, (c) passing the carrier and mixture between two constricting members forming therebetween a metering gap, and (d) allowing the mixture after passing through the gap to freely expand to form a plastic foam, wherein the acid number and amount of the high acid polyester polyol in the mixture are sufficiently high to result in a superior resistance to cold temperature shrinkage.
REFERENCES:
patent: 3032517 (1962-05-01), Dombrow et al.
patent: 4028158 (1977-06-01), Hipchen et al.
patent: 4411949 (1983-10-01), Snider et al.
patent: 4710521 (1987-12-01), Soukup et al.
patent: 4711912 (1987-12-01), Snider et al.
patent: 4927863 (1990-05-01), Bartlett et al.
patent: 5124366 (1992-06-01), Gluck et al.
patent: 5149722 (1992-09-01), Soukup
patent: 5252625 (1993-10-01), McLaughlin et al.
patent: 5254600 (1993-10-01), Blanpied et al.
patent: 5312848 (1994-05-01), Klapper et al.
patent: 5405884 (1995-04-01), Londrigan et al.
patent: 5563180 (1996-10-01), Skowronski et al.
Kennedy,E.F. et al., "Evaluations of HCFC-123 and HCFC-141b as Potential Blowing Agents for Polyurethane/Polyisocyanurate Rigid Foam Laminate Insulation", Polyurethanes 88, pp. 153-158.
Lund, E.A.E. et al., "A Performance Evaluation of Environmentally Acceptable Foam Blowing Agents", Polyurethanes 88, pp. 290-296.
Godbey Judy Ann
Londrigan Michael Edward
Lynn Gregory W.
Celotex Corporation
Foelak Morton
Vanecek Charles W.
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