Manufacturing ultramicrocellular polymer foams at low pressure

Details Manufacturing ultramicrocellular polymer foams at low pressure Manufacturing ultramicrocellular polymer foams at low pressure

1998-08-31

1999-09-21

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 50, 521 98, 521145, 521146, 521149, 521182, C08J 900

Patent

active

059555114

ABSTRACT:
The invention disclosed provides a method for producing ultramicrocellular polymer foams at low pressures. A polymer is saturated with a blowing agent at low temperatures and pressures within a short time period, due to retrograde vitrification. The blowing agent may be in the form of a gas or a volatile liquid. Polymer-blowing agent combinations are selected to provide a processing temperature/pressure in the area below the positive slope portion of the retrograde vitrification profile of the glass transition temperature of the polymer versus pressure. The polymer thus saturated has an exceptionally high blowing agent content, and is then foamed to produce materials with small cells and high cell density.

REFERENCES:
patent: 4473665 (1984-09-01), Martini-Vvedensky et al.
patent: 5133913 (1992-07-01), Miyakawa et al.
patent: 5160674 (1992-11-01), Colton et al.
patent: 5684055 (1997-11-01), Kumar et al.

Affiliated with

Also associated with

Rating

Manufacturing ultramicrocellular polymer foams at low pressure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacturing ultramicrocellular polymer foams at low pressure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacturing ultramicrocellular polymer foams at low pressure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-80874