Toughened mercaptosiloxane modified emulsion polymerized vinylic

Details Toughened mercaptosiloxane modified emulsion polymerized vinylic Toughened mercaptosiloxane modified emulsion polymerized vinylic

1976-04-23

1978-01-31

Taylor, Hosea E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 296NR, 260 297NR, 260 297RP, C08L 8310

Patent

active

040715779

ABSTRACT:
The impact strength of certain thermoplastic vinylic polymers is improved by polymerizing the corresponding monomers in an emulsion of a diorganosiloxane containing units of the formula HSR'SiR.sub.n O.sub.3-n/2. For example a styrene acrylonitrile copolymer containing 20 percent by weight of a dimethylsiloxane-3-mercaptopropylsiloxane copolymer having 1 mol percent mercaptosiloxane has an Izod notched impact strength of 10.8 foot pounds per inch.

REFERENCES:
patent: 2965593 (1960-12-01), Dietz
patent: 3382196 (1968-05-01), Gowdy et al.
patent: 3445415 (1969-05-01), Cekada, Jr. et al.
patent: 3532729 (1970-10-01), Cekada, Jr. et al.
patent: 3898300 (1975-08-01), Hilliard

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