Pigmentary material

Details Pigmentary material Pigmentary material

1996-09-23

1998-08-18

Smith, Jeffrey T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524316, C08L 3304

Patent

active

057959404

ABSTRACT:
Colour concentrate pellets for pigmenting polyvinyl chloride are substantially all of diameter 0.1 to 3 mm and comprise pigment dispersed in a carrier comprising ethylene-vinyl acetate polymer which is ethylene-vinyl acetate copolymer and/or alloy thereof with polyethylene, the polymer having a vinyl acetate content of 13-28% by weight and a melt flow index (as measured by the method of ASTM D1238 using a 2.16 kg weight at 190.degree. C.) of 3.5-150 g/10 minutes, the pellets comprising at least 30% by weight of the pigment and at least 10% by weight of the polymer.

REFERENCES:
patent: 5176751 (1993-01-01), Findley
patent: 5244942 (1993-09-01), Hover et al.
WPI Abstract 87-147605.
WPI Abstract 75-84009w.
WPI Abstract 75-38370w.
WPI Abstract 85-095399.
WPI Abstract 84-045622/08.
WPI Abstract 80-85275C/48.
WPI Abstract 75-7313W/44.
WPI Abstract 81-46552D.

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