Rigid foams

Details Rigid foams Rigid foams

1989-09-29

1994-10-18

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521125, 521128, 521160, 528 67, 25218221, C08G 1800

Patent

active

053569431

ABSTRACT:
RIGID FOAMS, in particular, polyisocyanurate and polyurethene foams having improved fire and surface properties can be prepared by reacting a polymethylene polyphenyl polyisocyanate composition with a polyfunctional active hydrogen compound under foam-forming conditions, the polyisocyanate composition containing not more than 20% by weight of dyisocyanates and not more than 20% by weight of polyisocyanates containing more than 5 isocyanate groups per molecule.

REFERENCES:
patent: 3936483 (1976-02-01), Gemeinhardt
patent: 4200699 (1980-04-01), Treadwell
patent: 4256847 (1981-03-01), Specter
patent: 4362678 (1982-12-01), Skowronski et al.
patent: 4405725 (1983-09-01), Bernard et al.
patent: 4555418 (1985-11-01), Snider et al.
patent: 4623673 (1986-11-01), DeGieuseppi et al.
patent: 4711912 (1987-12-01), Snider et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2373007