Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-01-11
1997-08-19
Lee, Helen
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
525 58, 525 60, C08G 6348, C08L 2904
Patent
active
056589778
ABSTRACT:
Cold water insoluble, hot water soluble and/or dispersible, disposable films, fabrics and other useful articles of manufacture are formed from a miscible polymeric resin blend comprised of cold water soluble partially hydrolyzed polyvinyl alcohol, cold water insoluble hot water disintegrable aliphatic polyester, and minor proportions of processing and performance aids. The aliphatic polyester has a melt temperature above the normal body temperature of a human (37 degrees C.; 98.6 degrees F.) and is present in the resin blend at a concentration sufficient to constitute the continuous phase of the blend, with the polyvinyl alcohol constituting a discontinuous phase of the blend. The aliphatic polyester thus renders the resin blend, and the partially hydrolyzed polyvinyl alcohol in the blend, cold water insoluble and determines the temperature at which articles formed from the blend will be subject to dissolution in an aqueous bath and subsequent disposal in an environmentally and ecologically sound fashion.
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Petcavich Robert J.
Yang Xiaoming
Lee Helen
Planet Polymer Technologies, Inc.
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