Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1989-09-13
1992-06-09
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521113, C08G 1808
Patent
active
051207710
ABSTRACT:
A polyurethane foam is produced using acetone as an auxiliary blowing agent. A polyol, an isocyanate, water, acetone and a catalyst for catalyzing the formation of polyurethane are mixed to produce an unfoamed liquid mixture, which is then retained in bulk form, preferably in an open-topped reaction vessel, for a dwell time during which an exothermic reaction occurs and the liquid foams. Finally, the foaming liquid is spread on to a surface on which it is allowed to expand and form a solid polyurethane foam material. Significant reductions in the amount of auxiliary blowing agent can be achieved, as compared with conventional formulations using methylene or CFC's as auxiliary blowing agents.
REFERENCES:
patent: 2737503 (1956-03-01), Sprague et al.
patent: 3121699 (1964-02-01), Merriman
patent: 3165483 (1965-01-01), Gemeinhardt
patent: 3193525 (1965-07-01), Kallert
patent: 3367892 (1968-02-01), Jorczak et al.
patent: 3586651 (1971-06-01), Salyer
patent: 3661885 (1972-05-01), Haddick
patent: 3985688 (1976-10-01), Speech
patent: 4055522 (1977-10-01), Ashida et al.
patent: 4246356 (1981-01-01), Walmsley
patent: 4251635 (1981-02-01), Stone
patent: 4259454 (1981-03-01), Crivello
patent: 4263408 (1981-04-01), Meyborg et al.
patent: 4303758 (1981-12-01), Gusmer
patent: 4401769 (1983-08-01), Malwitz
patent: 4546122 (1985-10-01), Radovich et al.
patent: 4546122 (1985-10-01), Radovich et al.
patent: 4745133 (1988-05-01), Grinbergs et al.
patent: 4849459 (1989-07-01), Grace et al.
Merck Index, Tenth Edition (1983), pp. 10, 445, 869.
Cartmell, M. J., "Developments In The Use Of CFCs In Polyurethane Foams," (European Isocyanate Producers Association, Apr. 1989).
Hurd, R., "Alternative Blowing Agents For Flexible Foams: HFA 123 and HFA 141B" (Apr. 1989).
Klesper; "Application of Volatile Organic Liquids For Expanding Flexible Foam," Rubber Age, pp. 84-87 (Oct. 1958).
"Polyurethane foam process uses less CFCs," C&EN, p. 17 (Nov. 7, 1988).
"Decline In Solvents Use," Chemical Week, p. 34 (Jul. 19, 1989).
Stinson, "Polyurethane Industry Tackling CFC Reductions," C&EN, pp. 23-24, and 27 (Oct. 24, 1988).
Hickory Springs Manufacturing Co.
Johnson Rachel
Welsh Maurice J.
LandOfFree
Process for the production of polyurethane foam does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of polyurethane foam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of polyurethane foam will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1804966