August 1992 Additives for Polymers

US 5,089,554 SILICA REINFORCED ELASTOMERS Rhane-Poulenc Priority Date: 15 September 1985

(Not abstracted).

US 5,091,461

BLOWING AGENTS

GB 2,250,992A

FILLED POLYMERIC BLEND The Dow Chemical Co. Priority Date: 7 April 1989

Inorganic filler of specific dimensions.

BLOWING AGENTS Toyo Kasei Priority Date: 25 November 1991

Tetrazole blowing agents.

PHOTO/BIO-DEGRADATION

US 5,087,650 DEGRADABLE PLASTICS Fully Compounded Plastics Inc. Priority Date: 5 December 1990

Use of starch filler which has been neither destructurized nor gelatinized.

PRODUCT INFORMATION

Improved liquid colourants Metacol, of Hull, (UK) who manufacture liquid colourants, has introduced a new range of dispersions developed specifically for use in the extrusion and blow moulding of polyolefines. They are based on a new carrier, selected for its compatibility with these materials, and its reduced tendency to cause screw-slip when used at high concentrations. The company says its new dispersions have been used successfully at concentrations up to 6 per cent, which is on the high side for liquid colourants, with no problems.

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