Add~~ves for Primers July 1993

MATERIALS Lubricants

Fire retardants

A magnesium hydroxide based fire retardant and smoke suppr~ss~t from Aican Chemicals, is designed for use in injection moulded and extruded thermopiastics. Designated Flamtard M7, it is a non-toxic product, thermally stable to 572°F. Contact: Alcan Chemicals, Cleveland, OH, USA.

Stabilizerslantioxidants

A liquid ~tioxid~t, BNX loo0 from Mayzo Inc. is said to eliminate particle size dispersion problems associated with solid products. BNX loo0 can be used to protect a range of adhesives, resins and elastomers. Contact: ~~za Inc., Norcross, GA, USA.

BASF has introduced three ~ompatibi~i~rs for improving the impact strength, elongation and flexibility of two-component mixtures of reclaimed polymers. Grade RCM 1 is for reclaimed polythene/polystyrene mixtures. Grade RCM 2 is for use in the compatibili~ation of poIypropylene/ polystyrene mixtures, and Grade RCM 3 is for ABSlpolypropylene mixtures. Contact: BASF AG, Carl-Bosch-Strasse 38, D-6700 L~wigs~ven, Gerry. Tel: +49- 621-60-0. Fax: +49-602-l 4-50.

Curing agents

Akzo is marketing an accelerator for polyester and vinyl ester resins which is a cobaft-metal complex with 4% cobalt, Designated Grade 383, it is said to eliminate ‘gel time drift’ in pr~promoted resins. Contact: Akzo Chemie America, 300 So&t Wacker Drive, II” Floor, Chicago, IL 60606, USA. Tel: +I-3~2-786”~~.

Luvaslip Iubricant masterbatches from Lehmann & Voss, are based on erucic acid amide, oteic acid amide, or ~mbinations of both in conjunction with SiO,, in a polyole- finic carrier (either potythene or poIy- propylene). Contact: Lehmann $r Voss & Co, Alsterufer 19, ~~2U~, Ha~urg 36,

Antib~o~k~ng agents

The SR 340346 series of ~tiblocking agents from GE Silicones are based upon a fine particle spherical form of silicone. They work by decreasing the contact area between film layers thereby preventing adhesion. Sphere sizes range from 0.3 to 12 microns. Contact: GE S~l~~o~~s, 260 N. Hudson River Road, Waterjord, NY 12188, USA. Tel: -i-l- 518-237-3330.

Air release agent

Byk-A grade 555 displaces air from fillers and reinforcements by reducing the interfacial tension between polymer and filler. It creates air bubbles which then rise to the surface and dissipate. ft is said to be effective at most viscosities_ Contact: Byk Chemie GmbH, Abelstrasse 14, Pos~a~h 245, D-4230 Wesel, Ge~ny. Tel: -I- 49-281-6-70-O. Fax: i- 49-281-6-57-35.

Processing aids

Plasadd PE9396 and Plasadd PE9361 from Cabot Plastics are masterbatches containing proprietary fluoro-elastomers which coat the internal surface of extrusion dies and reduce the friction between the polymer melt and the die. Using the masterbat~hes increases output, eliminates melt fracture and allows extruders to be run at lower temperatures. In some applications die build-up is also eliminated and cycle times reduced. To use the products, dies are first conditioned by using material

2 @1993 Efsevier Science Publishers Ltd