Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2005-12-14
2009-06-02
Tentoni, Leo B (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C264S051000, C264S053000, C264S054000
Reexamination Certificate
active
07540985
ABSTRACT:
A method of producing a polyurethane molded article is provided, in which one molding machine which can provide distinctly polyisocyanate component(s) and two kinds of polyol components is used, and prior to completion of the feed of a first polyurethane mixture liquid containing a polyisocyanate and a polyol component without a blowing agent into a mold, a second polyurethane mixture liquid containing a polyisocyanate and a second polyol component with a blowing agent is fed into the mold. The method produces, in a single stage, a polyurethane foam molded article having the skin or high density portion selectively formed on portions of the molded article actually requiring them, where the proportions of the skin and the high density portion and the foamed core can be varied freely.
REFERENCES:
patent: 3873656 (1975-03-01), Garner
patent: 4014966 (1977-03-01), Hanning
patent: 4968724 (1990-11-01), Mascioli
patent: 5437822 (1995-08-01), Wada et al.
patent: 6294248 (2001-09-01), Madan et al.
patent: 6352658 (2002-03-01), Chang et al.
patent: 0 995 568 (2000-04-01), None
patent: 5-59146 (1993-03-01), None
patent: 01/32392 (2001-05-01), None
Polyurethanes World Congress, Sep. 29-Oct. 1, 1997, pp. 185-191, H. Adolf et al, “Metering Attachments for Blowing Agent for Foam Applications like Pentane and Carbon Dioxide CO2”.
Maeda Hitoshi
Nakamura Masafumi
Suzuki Masaru
Bayer MaterialScience AG
Brown N. Denise
Cheung Noland J.
Mrozinski, Jr. John E.
Tentoni Leo B
LandOfFree
Method of producing a polyurethane foam molded article does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of producing a polyurethane foam molded article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a polyurethane foam molded article will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4103018