November 1999
Additivesfor Polymers
MATERIALS TRENDS Making plastics look like natural materials Customers are looking for products with a more ‘natural’ look, reports Wilson Color, the business unit of M A Hanna Co. Trend-setting applications now include white stone and earthenware (terracotta) effects, created for indoor and outdoor products, as well as ‘wooden’ chairs and tables which the company has developed in partnership with Grosfillex. But, according to Wilson Marketing Director Paul Mayeux, the trend is to replace traditional materials with plastics, and to use the plastic to imitate the original or highlight certain aspects of it. Building on its experience with fibres, beads, pearlescent and fluorescent effects, Wilson is responding to this challenge with a range of natural effects. Contact: MA Hanna Company - Wilson Color, 161 Dreve de Richelle, 1410 Waterloo, Belgium; tel: +32-2 352 0550; fax: +32-2 353 0566
Multi-functional for coatings
TiO2 pigment
Designed to provide a pigment of choice for tinting systems through high tint strength and stability coupled with balanced undertone is a new multi-purpose high performance rutile titanium dioxide pigment from Millennium Inorganic Chemicals. Tiona 568 is a surface-treated grade for a full range of coatings, giving opacity, brightness and colour with good durability and gloss and outstanding dispersion properties. Contact: Millennium Inorganic Chemicals Inc, 200 International Circle, Suite 5000, Hunt Valley MD 21030, USA; tel: +I-410 229 4400; fax: +I-410 229 4488
New PVC matting agent is crosslinked A novel matting agent for PVC, comprising very fine pearls of a crosslinked copolymer containing
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acrylic monomers, has been introduced by Elf Atochem’s additives subsidiary Ceca. Under the name Acrylperl, it has a very fine powder structure (typically 20-30 pm) that promotes homogeneous distribution and outstanding dispersion in the polymer melt during processing. It is effective at addition rates as low as 0.3 phr (parts per hundred of resin): normal use is at 0.3-4 phr, depending on the degree of matt finish required. It is also stable at elevated temperatures and has no impact on the thermal stability of the PVC compound. There is no effect on mechanical properties, and the additive (which, unlike other matting agents, has no yellowing effect) is intrinsically UV resistant. In the finished product, it produces an even matt or frosted appearance as the particles on the surface diffuse light. It can be used effectively in many rigid, flexible and PVC plastisol applications, and is reported to be in demand in the construction sector, for door panels, skirting boards, window ledges, electrical boxes, cable runs, pipe connections, furniture, cladding, floor and wall coverings. It remains effective in thermoforming, as the bead-like structure is crosslinked and is not affected by heat. It also functions, at lower addition rates (of 0.1 phr) as an anti-blocking agent in calendered or blown films, the finely-frosted finish imparted by the beads significantly reducing the tendency of films to stick together. Contact: ElfAtochem, Cedex 42, 92091 ParisLa-Defense, France; tel: +33-l 49 00 8018; fax: +33-l 49 00 8050
New lubrication technology makes low-cost bearing range With new proprietary lubrication technology, the US specialist compounder RTP Co has launched a new range of compounds for low-cost bearing materials in lubricated environments. Called Splash Lube Gold, the compounds incorporate specially formulated high temperature nylons with internal lubricants and other additives to deliver good wear performance over a wide Pressure Velocity window.
0 1999 Elsevier Science