May 1994 Additives for Pdymers

US 5283,273 Curing agents Stabilizer for chlorine-containing polymers Ciba-Geigy Priority Date: 30 November 1990 The polymer contains a sterically hindered amine, an organic or inorganic zinc compound, an organic or inorganic calcium magnesium, and/or barium compound and one I,3-di~~~nyl compound, but not an org~otin compound or hydrotalcit~ compound.

US 5,278,247 Curing agent for epoxy resins Nippon Paint Co Priority Date: 25 April 1991 Urea-superacid salts.

US 5,280,~7

US 5284,886 Antioxidant Elf Atochem

Curing agent for epoxy resins Minnesota Mining & Manufacturing Co Priority Date: 18 August 1992 Substituted pentafluoro-antimonic acid- substi~ted aniline.

Priority Date: 24 July 1991 Non-toxic polymeric compound stabilized with an org~o-sulphide antioxidant.

US 5,288,776 Fine pigment granules for plastics Stabilizer for chlorine-containing polymers Ciba-Geigy Priority Date: 7 June 1990 Substi~ted pyrroles.

Plasticizers

US 5278,236 Polymeric plasticizer for PVC Du Pont Priority Date: 23 April 1991 A terpolymer EXY where E is ethylene, Y is CO or SO,, and X is CT&,, n-alkyl acrylate.

Blowing agents

BASF now offers four reddish-yellow pigments in the form of fine granules for colouring plastics under the trade names Sicotan Gelb K 2011 FG, 2107 FG, 2111 FG and 2112 FG. These fine granules are low in dust and extremely easy to pour. Since the new fine granules are free of additives, they are very well-suited for all types of plastics. Their colour characteristics and colour intensities are identical to the corresponding Sicotan brands in powder form, which are still available. Contact: BASF plc, Pi~mems & ~r~~essi~~ ~erni~a~s B~iness Unit, PO Box 4, Earl Road, Cheadle Hdme, Cheshire, SK8 SQG, UK. Tel: -#-44-61-48.5-6222. Fax: +44-61- 488-4620.

US 5278,196 Blowing agent Great Lakes Priority Date: 25 March 1993 Hydrofluoroc~bon blowing agent which is 1 , 1,1,2,3,3,3-hepta~uoroprop~e.

Improved titanium pigment

Du Pont has announced a new titanium pigment R-104 especially designed to provide outstanding optical and rheotogical performance at higher loadings in masterbatch formulations. It is said that with the new

‘01994 Elsevier Science Ltd 5