Process for the production of rigid and semi-rigid foams...

Details Process for the production of rigid and semi-rigid foams... Process for the production of rigid and semi-rigid foams...

2006-05-31

2008-11-25

Eashoo, Mark (Department: 1796)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S155000

Reexamination Certificate

active

07456229

ABSTRACT:
This invention relates to a process for the production of rigid and semi-rigid foams at low isocyanate levels, and to the foams produced by this process. The process comprises reacting a polyisocyanate component with an isocyanate-reactive component, in the presence of at least one blowing agent, at least one surfactant and at least one catalyst. Suitable isocyanate-reactive components are characterized as having a solids content of at least 40% by weight, and an overall hydroxyl number of the remaining liquid, non-solids portion of at least 160. In addition, the isocyanate-reactive component comprises at least 50% by weight of a polymer polyol having a solids content of at least 30% by weight and in which the base polyol has a hydroxyl number of at least 75.

REFERENCES:
patent: 6265457 (2001-07-01), Dolgopolsky et al.
patent: 6455603 (2002-09-01), Fogg
patent: 6716890 (2004-04-01), Niederoest et al.
patent: 6777457 (2004-08-01), Dolgopolsky et al.
patent: 2004/0014828 (2004-01-01), Haider et al.
patent: 2006/0058409 (2006-03-01), Zaschke et al.
patent: 1 108 514 (2001-06-01), None
patent: 2 331 102 (1999-05-01), None
patent: 5-186550 (1993-07-01), None
patent: 98/16567 (1998-04-01), None
patent: 00/56805 (2000-09-01), None

Affiliated with

Also associated with

Rating

Process for the production of rigid and semi-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 Process for the production of rigid and semi-rigid 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 and semi-rigid foams... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4047676