Toughened mercaptosiloxane modified emulsion polymerized vinylic

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

1978-08-21

1980-11-04

Briggs, Sr., Wilbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

260 296NR, 525102, 525106, C08L 3504, C08L 2512, C08L 8100

Patent

active

RE0304310

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
patent: 4138387 (1979-02-01), Bluestein

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