Standard Oil Company (Indiana)

The Standard Oil Company

Francis J Slama

Ivor R Fielding

Wassily W Poppe

Impact resistant compositions comprise a blend of a styrene polymer having a number average molecular weight from about 200,000 to 600,000, and a rubber-modified styrene polymer prepared by mass polymerization of a solution of a rubber in styrene monomer.

Impact resistant polystyrene blends

Limiting final conversion of monomer to polymer in a multiple stage, vinyl aromatic-rubber mass polymerization system to about 50 to about 89 percent produces a polymer with increased impact strength and decreases residence time, thereby increasing the production capacity of the system.

Vinyl aromatic polymerization process

This invention relates to flame resistant resinous polymer compositions. More particularly, this invention relates to flame resistant compositions comprising a resinous thermoplastic polymer, ammonium nitrate, ammonium polyphosphate and a chlorine or bromine containing organic compound.

Flame retardant polymer composition

Non-dripping, preferably fire retardant polypropylene compositions comprising modified polypropylene component and a cross-linker. Conventional fire retardants can also be present.

Anti-drip additive system for fire retardant polypropylene

Translucent rubber-modified styrene polymers are prepared by using halogenated rubbers in the polymerization feedstock.

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Aurora, IL, United States of America

Francis J Slama