Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1995-05-08
1996-01-09
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, 264 54, 521 60, 521 79, 521138, C08J 908, C08J 910
Patent
active
054829771
ABSTRACT:
Disclosed are branched polyester compositions having an I.V. of at least about 0.7 dl/g and a melt viscosity sufficiently high to permit foaming during extrusion or molding operations. These branched polyesters are readily foamable with a wide range of foaming agents to provide low density shaped articles, films, and sheets.
The branched polyesters comprise about 80 to about 99.9 wt % of a polyester and about 0.1 to about 20 wt % of an ethylene copolymer containing repeat units of ethylene and of a monomer selected from the group comprising acrylic acid, methacrylic acid, alkyl acrylate, alkyl methacrylate and vinyl alcohol. The polyester comprises repeat units from about 75 to 100 mol % of a dibasic acid having from about 6 to about 40 carbon atoms and 0 to about 25 mol % of a modifying dibasic acid and repeat units from about 75 to 100 mol % of a glycol having from about 2 to about 10 carbon atoms, 0 to about 25 mol % of a modifying glycol and 0 to about 25 mol % of a modifying compound selected from the group comprising amino alcohols, diamines and lactams.
REFERENCES:
patent: 4737523 (1988-04-01), White et al.
patent: 4751250 (1988-06-01), White et al.
patent: 4837243 (1989-06-01), White et al.
patent: 4851453 (1989-07-01), White et al.
patent: 5288764 (1988-06-01), Rotter et al.
patent: 5346846 (1994-08-01), Rotter et al.
patent: 5391582 (1995-02-01), Muschietti et al.
patent: 5422381 (1995-06-01), Ghatta et al.
Khemani Kishan C.
McConnell Richard L.
Eastman Chemical Company
Foelak Morton
Gwinnell Harry J.
Tubach Cheryl J.
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