Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
2000-03-08
2000-12-12
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 81, C08J 914
Patent
active
061600296
ABSTRACT:
A polymer blend foam having smooth skin and/or an open-cell content of at least 20 volume percent, a crosslinked gel content of no greater than 10 percent, a minimum cross-sectional area of at least 1000 mm.sup.2, and a density of no greater than 250 kg/m.sup.3. The blend includes (A) a substantially random interpolymer having polymerized therein (1) a vinyl or vinylidene aromatic monomer and/or a sterically hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and (2) one or more of ethylene and a C.sub.3-20 aliphatic .alpha.-olefin; and (B) an olefin polymer based on one or more of ethylene, C.sub.3-20 aliphatic .alpha.-olefins, and C.sub.3-20 aliphatic .alpha.-olefins containing polar groups. The olefin polymer (B) lacks any of the vinyl or vinylidene aromatic monomers found in (A).
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Barry Russell P.
Chaudhary Bharat I.
Tusim Martin H.
Foelak Morton
The Dow Chemical Company
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