Pigmented polycarbonates

Details Pigmented polycarbonates Pigmented polycarbonates

1976-10-22

1977-09-20

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 336

Patent

active

040496147

ABSTRACT:
Polycarbonates are pigmented with an opaque pigment such as TiO.sub.2 and contain, intimately mixed therein, a silica at a level of 0.01 to 3% by weight. The silicas are those produced by the flame hydrolysis of SiCl.sub.4 and have a particle size up to about 10 microns. The pigmented polycarbonates can be moulded to form articles having excellent surface appearance and are especially adapted for moulding polycarbonates in moulds having radical contours and fine interstices which constrict the flow path of the polycarbonate during moulding.

REFERENCES:
patent: 3360498 (1967-12-01), Rawlings
patent: 3437631 (1969-04-01), Cleveland
patent: 3933730 (1976-01-01), Hoogeboom

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