Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1991-04-17
1993-12-14
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 465, 264 466, 264 468, 264 53, 264255, B29C 6722
Patent
active
052699862
ABSTRACT:
Refrigeration units having internal parts containing a rigid polyurethane foam formed without the use of perhalogenated fluoro-chlorohydrocarbons are produced by applying a coating to the internal walls of the part in which back-foaming will take place, pouring a foam forming reaction mixture into the cavity of the part in which the internal walls have been coated and allowing the foam to form and set. The coating applied to the internal walls of the part in which back foaming is to be carried out is selected from one-component chemically cross-linking lacquers, two-component chemically cross-linking lacquers and lacquers based on aqueous polyurethane dispersions. The foam forming mixture generally includes a polyisocyanate, a polyisocyanate-reactive compound and a blowing agent. The blowing agent must include a partially halogenated hydrocarbon having at least one carbon-hydrogen bond and a boiling point in the range of from about -50.degree. to about 50.degree. C.
REFERENCES:
patent: 3137744 (1964-06-01), Burrus
patent: 3209056 (1965-09-01), Jacobs
patent: 3440308 (1969-04-01), Carbary et al.
patent: 3773552 (1973-11-01), Bird et al.
patent: 4005919 (1977-02-01), Hoge et al.
patent: 4048274 (1977-09-01), Hoge et al.
patent: 4107833 (1978-08-01), Knight et al.
patent: 4209564 (1980-06-01), Nomura et al.
patent: 4293659 (1981-10-01), Svoboda
patent: 4294880 (1981-10-01), Nishida
patent: 4644017 (1987-02-01), Haas et al.
patent: 5035833 (1991-07-01), Ogawa et al.
Dederichs Reinhold
Eisen Norbert
Henning Wolfgang
Zollner Robert
Bayer Aktiengesellschaft
Gil Joseph C.
Kuhns Allan R.
Whalen Lyndanne M.
LandOfFree
Process for the production of back foamed internal parts for ref 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 back foamed internal parts for ref, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of back foamed internal parts for ref will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1702866