August 1993 Additives for Polymers

US 5,194,466 Stabilizer Ciba-Geigy Priority Date: 27 July 1989 Piperidine-triazine compounds.

us 5,194,470 Stabilizer for chlorinated polymers Rhone-Poulenc Chimie Priority Date: 20 April 1990 Comprises: dawsonite, an organotin B- diketone, an organic zinc compound, and an organic calcium, magnesium, barium, or lanthanide compound.

US 5,196,462 Antioxidants Himont Inc Priority Date: 18 September 1991 Zinc salts of certain mercapto compounds as antioxidants for high temperature ageing of thermoplastic elastomers.

US 5,196,465 Stabilizers Ciba-Geigy Priority Date: 5 February 1991 1.2,4-triazolidine-3,5-dione derivatives,

US 5,200,444 Heat & light stabilizers Rhone Poulenc Chimie Priority Date: 31 May 1989 Benzophenone/l,4-dihydropyridine compounds.

US 5,200.45 1 Heat stabilizer Wrightline Chemical Corporation Priority Date: 5 March 1992 1,3-diphenoxy-2-propanol.

US 5.202.441 Stabilizers

Ciba-Geigy Priority Date: 7 November 1989 Polymeric stabilizer containing both hindered amine and hydroxylamine moities.

Fillers/reinforcements

us 5,191,Oll Filled polyacetals Polyplastics Co Priority Date: 1 March 1990 Describes a method of manufacture (not abstracted).

US 5,196,467 Coated/sized glass fibres Owens-Corning Priority Date: 19 December 1991 The size comprises: a compound with a N- methyl01 function or N-CH,-OR function or both, with R being an alkyl radical, a carboxyl modified polyhydroxy ether, and an epoxy silane coupling agent.

Degradable polymers

US 5,204,412 Photodegradable polymers BP Chemicals Priority Date: 13 April 1989 Photodegrading agent is a polyketone.

PRODUCTS

Hollow glass fibres

The hollow glass fibres introduced some two years ago by Owens Corning Fiberglas under the trade-name Hollex, are a likely lower-cost alternative to quartz fibres in applications that must be electrically or radar transparent. Contuct: Owens-Corning Fiberglus Carp, Fiberglus Towor, Toledo, OH 43659, USA. Tci: + l-41 9-248-8000.

Ol993 Elsevier Science Publishers Ltd