Soft ethylenic polymer foams

Details Soft ethylenic polymer foams Soft ethylenic polymer foams

1977-01-27

1978-07-18

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264DIG5, 521 98, 521149, C08J 914

Patent

active

041014677

ABSTRACT:
Low density, closed cell, soft foam products having dimensional stability are made from ethylenic resins having low stiffness, especially comprising copolymers consisting essentially of ethylene and monoethylenically unsaturated non-ionic comonomers, by release to lower pressure of a flowable, foamable gel under pressure, e.g., by extrusion foaming, wherein the gel comprises the ethylenic polymer and a volatile mixed blowing agent. The stating polymers are preferably copolymers of ethylene and vinyl acetate having stiffness less than about 20,000 psi. The mixed blowing agents are particularly characterized as mixtures of at least one fluorocarbon constituent I and at least one fluorocarbon constituent II, as defined. Exemplary mixtures contain (I) 1,2-dichloro-1,1,2,2-tetrafluoroethane and (II) from 25 to 50 percent chloropentafluoroethane, octafluoropropane or octafluorocyclobutane based on the mixtures of I and II.

REFERENCES:
patent: 3449268 (1969-06-01), Scheffler
patent: 3766099 (1973-10-01), Kawai et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-338276