Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1997-06-23
1999-10-05
Cooney, Jr., John M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 79, 521 81, 521 82, C08J 912
Patent
active
059625457
ABSTRACT:
Disclosed is a method of enhancing open cell formation in making extruded alkenyl aromatic polymer foams of about 30 percent or more open cell content. Open cell formation is enhanced by incorporating into the foam an ethylene copolymer having a Vicat softening point of about 85.degree. C. or less. The ethylene copolymer is incorporated at from about 0.1 to about 7 percent based upon the weight of the alkenyl aromatic polymer material comprising the foam.
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patent: 5109029 (1992-04-01), Malone
patent: 5340840 (1994-08-01), Park et al.
patent: 5434195 (1995-07-01), Imeokparia et al.
patent: 5557896 (1996-09-01), Imeokparia et al.
Chaudhary Bharat I.
Malone Bruce A.
Cooney Jr. John M.
Roberts John H.
The Dow Chemical Company
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