LOW PROFILE MOLDING COMPOSITION AND PROCESS FOR MAKING SAME

This invention concerns a molding composition of reduced viscosity for production of low profile moldings which comprises, by weight, 100 parts of a mixture of a terminally unsaturated vinyl ester resin having pendant half ester groups and a copolymerizable monomer, 5 to 25 parts of a polymeric low...

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Bibliographische Detailangaben
Hauptverfasser:	HAWKINS, JERRY M, TATUM, SAMMY D
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	This invention concerns a molding composition of reduced viscosity for production of low profile moldings which comprises, by weight, 100 parts of a mixture of a terminally unsaturated vinyl ester resin having pendant half ester groups and a copolymerizable monomer, 5 to 25 parts of a polymeric low profile additive, such as a polydiene rubber, 10 to 150 parts of an inert filler, and 0.1 to 5 parts of a viscosity reducing agent which is a copolymer of a maleic acid half ester of a polyethylene glycol having an average molecular weight of 1450 to 6000 and a monoalkenyl aromatic monomer, said copolymer containing 0.5 to 2 moles of the half ester per 100 moles of the aromatic monomer and having an average molecular weight of from 15000 to 50000. The compositions have improved stability, permit increased proportions of filler such as CaCO3, and provide improved wetting of glass reinforcing fiber.