Foaming system for phenolic foams

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

521181, 521910, 521 98, C08J 914

Patent

active

046877878

ABSTRACT:
A mixture of CFC-113 and CFC-123 and/or CFC-123a where CFC-123 or CFC-123a is a significant portion of the total composition has been found to result in improved blowing agent performance in phenol-formaldehyde foams compared to CFC-113.
The use of CFC-123 (or CFC-123a, or both), in combination with CFC-113 improves resole resin solubility and mixed ingredient solution stability, prior to foaming. In addition, because of the lower molecular weight of CFC-123 (or CFC-123a) compared to CFC-113 better blowing agent efficiency will be realized per unit weight. Also, the lower boiling points of CFC-123 and CFC-123a as compared to CFC-113 results in a more ready conversion of dissolved blowing agent to released gaseous blowing agent by the exothermic phenolic resin polymerization. And because of the lower molecular weight and lower boiling point factors, a lower density foam is realized.

REFERENCES:
patent: 4419460 (1983-12-01), Ho
patent: 4423163 (1983-12-01), Doerge
patent: 4424289 (1984-01-01), Meyer
patent: 4525492 (1985-06-01), Rastall
patent: 4530939 (1985-07-01), Rickle
patent: 4539338 (1985-09-01), Carlson et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-1118145

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.