Preparation of polymeric materials disintegratable by ultraviole

Details Preparation of polymeric materials disintegratable by ultraviole Preparation of polymeric materials disintegratable by ultraviole

1974-06-27

1976-07-13

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 837, 526 66, 526340, C08F23610

Patent

active

039694321

ABSTRACT:
A process for preparing vinyl aromatic resin-, e.g. styrene-,based resinous materials to render them brittle and disintegratable upon prolonged exposure to ultraviolet light while retaining, in the absence of ultraviolet light, substantially the same appearance, processability and mechanical properties of conventional vinyl aromatic resin-based materials, comprising copolymerizing said vinyl aromatic monomer with from 0.5 to 6.0% of a conjugated diene monomer, e.g. isoprene, based on the total weight of the two monomers, initially copolymerizing said vinyl aromatic monomer with only a portion of the total amount of conjugated diene monomer and then completing the copolymerization with the remainder thereof, and the polymeric resin obtained by said process.

REFERENCES:
patent: 2835645 (1958-05-01), D'Ianni
patent: 3299178 (1967-01-01), Short
patent: 3317492 (1967-05-01), Hochwalt
patent: 3328488 (1967-06-01), Delacretaz
patent: 3386926 (1968-06-01), Gavoret
patent: 3579612 (1971-05-01), Lowell

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