Process for making rigid polyurethane foams

Details Process for making rigid polyurethane foams Process for making rigid polyurethane foams

2011-08-23

2011-08-23

Cooney, John (Department: 1765)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S130000, C521S131000, C521S164000, C521S167000, C521S172000, C521S174000

Reexamination Certificate

active

08003708

ABSTRACT:
Process for making rigid polyurethane or urethane-modified polyisocyanurate foams at an isocyanate index of between 110 and 120 comprising the step of reacting an organic polyisocyanate composition with an isocyanate-reactive composition in the presence of a hydrocarbon as blowing agent wherein the isocyanate-reactive composition contains between 3 and 30 wt % of polyester polyols and between 20 and 50 wt % of polyether polyols derived from aromatic amines, the amounts being calculated on the basis of total isocyanate-reactive compound.

REFERENCES:
patent: 4536522 (1985-08-01), Grigsby et al.
patent: 4972002 (1990-11-01), Volkert
patent: 4972004 (1990-11-01), Randall et al.
patent: 4981879 (1991-01-01), Snider
patent: 5034424 (1991-07-01), Wenning et al.
patent: 5070115 (1991-12-01), Welte et al.
patent: 5238970 (1993-08-01), De Vos
patent: 5470501 (1995-11-01), Fishback et al.
patent: 5489618 (1996-02-01), Gerkin
patent: 5539008 (1996-07-01), Dams et al.
patent: 5578656 (1996-11-01), Gillis et al.
patent: 5684057 (1997-11-01), White, III et al.
patent: 5837743 (1998-11-01), Londrigan et al.
patent: 5874021 (1999-02-01), Inazawa et al.
patent: 6316513 (2001-11-01), McCullough et al.
patent: 6476091 (2002-11-01), White et al.
patent: 6586490 (2003-07-01), Dietrich et al.
patent: 6646020 (2003-11-01), Nyberg et al.
patent: 2002/0169228 (2002-11-01), Riley et al.
patent: 320134 (1989-06-01), None
patent: 498628 (1992-08-01), None
patent: 508649 (1992-10-01), None
patent: WO 95/18176 (1995-07-01), None
patent: WO 96/12758 (1996-05-01), None
patent: WO 02/053615 (2002-07-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2709245