Process for the production of flexible polyurethane foams

Details Process for the production of flexible polyurethane foams Process for the production of flexible polyurethane foams

2002-10-30

2009-08-11

Cooney, John (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S129000, C521S130000, C521S163000, C521S170000, C521S174000

Reexamination Certificate

active

07572837

ABSTRACT:
Flexible polyurethane foams are produced by reacting a polyol and a polyisocyanate in the presence of a catalysts and other auxiliary agents, the process characterized in that a tin-based catalyst is not used. One process includes reacting a polyether polyol containing at least 5% by weight of an oxyethylene group in the chain and having a terminal secondary OH group, a toluene diisocyanate and/or a derivative, and one or more specified imidazole compounds, the process conducted in the absence of a tin-based catalyst.

REFERENCES:
patent: 3380967 (1968-04-01), Lowe et al.
patent: 3912689 (1975-10-01), Bechara et al.
patent: 4189543 (1980-02-01), Doorakian et al.
patent: 4234693 (1980-11-01), Wooler
patent: 5171759 (1992-12-01), Hager
patent: 5306738 (1994-04-01), Yoshimura et al.
patent: 5539007 (1996-07-01), Listemann et al.
patent: 5672761 (1997-09-01), Adkins et al.
patent: 5958994 (1999-09-01), Lear et al.
patent: 0 451 826 (1991-10-01), None
patent: 0 469 545 (1992-02-01), None
patent: 1 092 737 (2001-04-01), None
patent: 1 138 708 (2001-10-01), None
patent: 1 262 500 (2002-12-01), None
patent: 54-093098 (1979-07-01), None
patent: A-57-195113 (1982-11-01), None
patent: 61-2723 (1986-01-01), None
patent: A-3-239716 (1991-10-01), None
patent: 4-149227 (1992-05-01), None
patent: 5-262843 (1993-10-01), None
patent: 6-211958 (1994-08-01), None
patent: 9-48834 (1997-02-01), None
patent: A-9-124764 (1997-05-01), None
patent: 09-302066 (1997-11-01), None
patent: 10-168153 (1998-06-01), None
patent: A-2001-181363 (2001-07-01), None
patent: A-2001-247643 (2001-09-01), None
Office Action dated Mar. 25, 2008 in Japanese application 2002-185084 (with English translation).

Affiliated with

Also associated with

Rating

Process for the production of flexible polyurethane 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 Process for the production of flexible polyurethane foams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of flexible polyurethane foams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4074216