Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-08-27
1993-07-06
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 97, 521134, 521139, 521140, 525 75, 525 76, 525 78, 525 80, 525 94, 525 98, 525210, 525212, 525213, 525215, 525221, 525227, 525238, 525239, 525240, 525241, C08J 914
Patent
active
052254518
ABSTRACT:
A foamable composition for producing an ultra low density polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot comprising a heat-plastified mixture comprising (1) an olefin polymer resin selected from the group consisting of ethylene homopolymers and copolymers of ethylene and a copolymerizable monomer; (2) an elastomer in an amount of about 3 to about 30 wt. parts per 100 wt. parts of said olefin polymer resin; (3) polystyrene in an amount of about 1 to about 15 wt. parts per 100 wt. parts of said olefin polymer resin; (4) a stability control agent selected from the group consisting of partial esters of long chain fatty acids with polyols, higher alkyl amines, fatty acid amides, and olefinically unsaturated carboxylic acid copolymers, and (5) a hydrocarbon blowing agent having from 1 to 6 carbon atoms and a boiling point between -175.degree. C. and 50.degree. C., said heat-plastified mixture being at a temperature and a pressure which does not allow said mixture to expand, said low density polyolefin foam made from said foamable composition and process of making said foam.
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Kisner Ronnie D.
Rogers John E.
Astro-Valcour, Inc.
Foelak Morton
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