Additives jbr Po&ners September 1994

Additives for unplasticized PVC is available from: Ckporute ~eve~p~~ ~o~u~ants, 3 I%e Plain, Thornbury, Bristol, BS12 ZAG, UK. Tel: +44-454-4195&i. Fax: i-44-454- 414421.

PATENTS (~U~~P~AN~

Fire retardants

JO61 16459 Fire retardant polycarbonatelstyrene polymer Kanebuchi Kagaku Kogyo Priority Date: 2 October 1992 Contains a phosphorus fire retardant and PTFE.

JO61 16478 Fire retardant potting compound Shinetsu Chemical Industry Priority Date: 8 October 1992 Comprises an antimony trioxide-containing phenolic dispersed in an epoxy resin compound for use in potting of semi- conductors.

JO61 16481 Fire retardant PBT Teijin Ltd Priority Date: 9 October 1992 Polybutylene terephthalate containing a bromine-containing fire retardant and an antimony type auxiliary fire retardant.

Stabilizers

SUl803412 Stabilizer for polyolefins As Sibe Oil Chemical Institute Priority Date: 24 ‘October 1990 A mixture of high molecular weight petroleum compounds used as heat and light stabilizer in poIyole~ns.

Plasticizers

JO61 16437 Plasticizer for polycarbonate Daicel Chemical Industry Priority Date: 7 October 1992 2,2-bis (4-acetyloxyphenyl) propane plasticizer for a bisphenol A polycarbonate. It has high flowabili~ and compatibiIi~ with the polymer,

Colorants

US5316570 Pigments free of heavy metals Ferro Corp Priority Date: 28 September 1992 Comprises prase~ymium doped zircon particles.

PATENTS (USA)

Stabilizers

US 5,308,884 Stabilizer for PU foams Uniroyal Inc Priority Date: 17 September 1993 A mixture of ealpha, alpha-dime~yI-be~yl diphenylamine and 4,4-bis- (alpha, alpha- dimethyl-benzyi) diphenyiamine.

US 5,308,901 Stabilizer Ciba-Geigy Priority Date: 27 September 1993 3-9-diphosphaspiroundecane.

US $310,767 Stabilizers Ciba-Geigy Priority Date: 17 December 1991 Tetr~e~ylpiperidine compounds.

@1994 Ekevier Science Ltd