Febr~~ I994 Additives for Polymers

Priority Date: 23 November 1992 A blend of redistributed polycarbonate with unpacified titanium dioxide.

Fillers

su1770304 Polymer-mineral mixture Univ. Mordovo Priority Date: 13 April 1990 Comprises urea formaldehyde resin, nitro lignin, quartz sand, iron oxide and burnt pyrite waste.

Antistatic agents

JO5255550 Antistatic com~sitions New Japan Chemical Co Ltd Priority Date: 13 March 1992 Comprises a polypropylene, polythene, polystyrene, or ABS type composition compounded with ammonium perchlorate.

505255580 Antistatic polycarbonate composition Mitsubishi Kasei Corp Priority Date: 11 March 1992 Contains an alkyl sulphonate type antistatic agent and also an epoxy compound.

Curing agents

W0932 1250 Curing agent for epoxy resins Akzo NV Priority Date: 21 April 1992 Preparation of an aqueous hardener for epoxy resin systems having low toxicity.

&%e information given in the above section has been supplied by Derwent Publications Ltd, Derwent House, 14 Great Queen Street, London, WCZB SDF, UK. Tel: i-44-71 -344- 2800. Fax: -i- 44- 71-344-2900. Extended salaries or full copies of the patents listed can be obtained~o~ Derwent).

PATENTS (USA)

Fire retardants

US 5,256,714 Fire retardant PBT General Electric Co Priority Date: 10 September 1991 A mixture of a polyphosphonate ether, an ammonium polyphosphate and a halogenated benzosulphate in PBT.

US 5256,718 Fire retardant nylon Mitsui Petrochemical Industries Priority Date: 14 February 1990 Comprises a nylon, a halogenated organic compound, an antimony-containing compound, and a phosphors-containing compound.

US 5,256,719 Fire retardant composition DSM Priority Date: 12 September 1991 A tire retardant composition based on a nylon, a polyolefin, and magnesium hydroxide.

US 5,258,434 Fire retardant PBT Po~yplastics Co Priority Date: 29 May 1991 Contains an antimony compound containing both antimony pentoxide, and an alkyl metal oxide.

US 5,258,438 Fire retardant ~om~sition DSM Priority Date: 12 July 1991 Fire retardant composition based on bromostyrene-containing polymers.

US 5,258,439 Fire retardant nylon

*1994 Elsevier Science Ltd 9