A~i~ves for Pollers April 1993

injection moulded products. Contact= PPG pastries fnc, Polymer Products, PO Box 98, 1(X Station Avenue, Stocker-town, PA 18083, USA.

PATENTS (EUROPEAN)

Stabilizers/Antioxidants

RO 101588 Antioxidants Traian Vuia Inst Politeknic Priority Date: 10 June 1988 Preparation of di:tert-butylamino-phenol, free from degradation by oxygen, from di:tert- butyl-benzoquinone-mon:oxime, sodium- dithionite and added di:tert-butyl- methylphenol stabilizer. For use in the preparation of phenolic antioxidants.

SU 1705289 Stabilizer Leningrad Technical Institute Priority Date: 25 December 1989 Production of 2-undecyl imidazole in a single stage, continuous process giving 88% yield. The product is used as a polymer stabilizer, and an epoxide resin hardener.

Fire Retardants

JO 4325551 Fire retardant PET Asaki Chemical Industry Co Priority Date: 25 April 1991 Flame retardant PET composition used in mercury lamp parts etc. comprises PET, brominated carbonate oligomer, be~tri~ole and an aryl phospho compound.

JO 4325564 Fire retardant com~si~on Daiichi Kogyo Seiyaka Priority Date: 25 April 1991 Composition comprising 100 pts. wt. of thermoplastic resin, 2-48 pts. wt. of 2,4,6-tris (2,4,6-tribromophenoxy) -1,3,5_triazine, 5-50

4

pts. wt. of bromine-contg. epoxy resin having a mol. wt. of l,~-50,~, and l-20pts. wt. of antimony trioxide.

WO 9221728 Fire retardant gel composition Raychem Corporation Priority Date: 5 June 1991 Polysiloxane gels used in encapsulating substrates, especially in electrical components in indoor electrical systems, automotive and aviation wiring and in nuclear power plants. The gels have flame retardancy with improved mechanical properties without compromising sealing performance and at a relatively low cost.

Colorants

JO 4325563 Coloured thermoplastics composition Dainippon Ink & Chemical Corporation Priority Date: 26 April 1991 ~ermoplastic containing a pearl coloured pigment and black or grey insoluble fibres.

SliplAntiblocking Agents

WO 9221719 Packaging film containing slip and antiblocking agents Du Pont & Co Priority Date: 29 May 1991 An improved packaging film for use in the process of packaging articles at elevated temperatures, comprises propylene polymer incorporating slip and anti-blocking additives and less than 0.5 wt. % of wax to reduce the tendency of the packaged articles to stick together.

PATENTS (USA)

Stabilizers

US 5,132,344 Stabilized ~lythene

Q1993 Elsevier Science Publishers Ltd