Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-04-04
1978-07-11
Michl, Paul R.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C08F27902
Patent
active
041002270
ABSTRACT:
An improved resinous structure is disclosed. The structure has a transparent resinous matrix of polystyrene, a light absorbance (optical density) at 640 millimicrons wave length which is not more than 0.10 when the structure has a thickness of 10 mils. The structure contains a discontinuous phase of a diene rubber in a proportion of about five to twelve parts by weight per hundred parts by weight of the structure. The rubber is present in the form of particles having an average diameter not exceeding about 2 microns. The particles are of a cellular nature and principally of a closed-cell configuration. The cell walls of the particles are not more than about 0.15 microns in thickness. The rubber particles contain occluded therein a 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
Bredeweg Corwin J.
Dennis Kent S.
Lyons Charles E.
Michl Paul R.
The Dow Chemical Company
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