Process for the production of rigid polyurethane foams

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

1991-08-13

1993-06-29

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521173, 521906, C08G 1834

Patent

active

052235491

ABSTRACT:
Rigid polyurethane foams are produced by reacting a polyisocyanate with a polyester containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 400 to 10,000 in the presence of water, an organic blowing agent, a flameproofing agent and a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from 32 to 399 as crosslinking agent, optionally in the presence of known auxiliaries and additives. The polyester, the flameproofing agent and the crosslinking agent are used in quantities such that from about 15 to about 35 parts by weight of polyester, from about 50 to about 80 parts by weight flameproofing agent and from about 5 to about 15 parts by weight of crosslinking agent (with the sum of the parts by weight of these components adding up to 100) are present. These foams are useful as insulating materials in applications where flame resistance is important.

REFERENCES:
patent: 4263408 (1981-04-01), Meyborg et al.
patent: 4575520 (1986-03-01), Kapps et al.
patent: 4849459 (1989-07-01), Grace et al.
patent: 4940632 (1990-07-01), Nicola et al.

Affiliated with

Also associated with

Rating

Process for the production of 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 the production of rigid 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 rigid polyurethane foams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1756008