Transparent impact styrene polymer structure

Details Transparent impact styrene polymer structure Transparent impact styrene polymer structure

1977-04-04

1978-07-11

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F27906

Patent

active

041002288

ABSTRACT:
An improved resinous structure is disclosed. The structure has a transparent resinous matrix having a light absorbance (optical density) at 640 millimicrons wavelength which is not greater than 0.07 when the structure has a thickness of 10 mils. The continuous matrix polymer is a polymer of about 65 to 95 parts by weight of styrene and 5 to 35 parts by weight of methylmethacrylate. The structure contains a discontinuous phase of a diene rubber in a proportion of about 4 to 12 parts by weight. The rubber is present in the form of particles having an average diameter not exceeding 2 microns, the particles are of a cellular nature and principally of a closed-cell configuration. The cell walls of the particles are not greater than about 0.15 microns in thickness. The rubber particles contain, occluded therein, polymer of a composition generally identical to the matrix polymer. Such resinous bodies are transparent, impact resistant and suitable for many packaging applications.

REFERENCES:
patent: 3400175 (1968-09-01), Finestone
patent: 3660535 (1972-05-01), Finch
patent: 3868434 (1975-02-01), Westphal
patent: 3883616 (1975-05-01), Hozumi
patent: 3957915 (1976-05-01), Spanswick
patent: 3989771 (1976-11-01), Reith
patent: 4011284 (1977-03-01), Gawne

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