Photographic support comprising polymerized propylene, talc, tit

Details Photographic support comprising polymerized propylene, talc, tit Photographic support comprising polymerized propylene, talc, tit

1974-10-01

1976-08-10

Klein, David

Gas separation: apparatus

Magnetic separating means

And electric field separation apparatus

96 77, 428523, G03C 700, G03C 140, B23B 2700, B44D 122

Patent

active

039739635

ABSTRACT:
Compositions are provided comprising a film-forming crystalline polypropylene, crystalline block copolymer of propylene and at least one other .alpha.-monoolefin selected from the group of ethylene and .alpha.-monoolefin hydrocarbons of 4 to 10 carbon atoms or mixtures of the block copolymer and the polypropylene, having incorporated therein about 15 to 40% by weight talc, 5 to 15% by weight titanium dioxide pigment, 5 to 20% of an elastomer and one-tenth to 1% by weight of a polyolefin antioxidant.
The films or sheets prepared from these polyolefin compositions have the stiffness, opacity and printability normally associated with paper and provide excellent replacements for paper used in photographic elements. In addition, they have excellent tear strength and elongation.

REFERENCES:
patent: 3227550 (1966-01-01), Whitemore et al.
patent: 3529037 (1970-09-01), Hegemoyer et al.
patent: 3874880 (1975-04-01), Venor et al.

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