Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-09-11
1991-08-06
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525463, C08L 6302, C08L 6304, C08L 6900
Patent
active
050379038
ABSTRACT:
Thermoformable, thermosettable resins essentially free of secondary alcohol groups are obtained by reaction of oxiranes in active hydrogen-free polyepoxides with carboxylate and/or carbonate groups in active hydrogen-free aryl polyesters, polycarbonates or copolyestercarbonates in the presence of catalytically effective amounts of certain polyorgano phosphonium or phosphine iminium salts.
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Bleutge John C.
Clark Janet Pauline
Sellers II Robert E. L.
The Dow Chemical Company
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