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20 PIGMENT AND RESIN TECHNOLOGY SEPTEMBER 1978 Paint additives sample kit The Boston Chemical Co Ltd., of the nominal molecular weight, A comprehensive sample Thorp Arch Trading Estate, using 1.ON NaNO as the elutant ki t of eight Dow Corning paint Wetherby , Yorks. in GPC, the differential refracto- additives is now available free meter not responding to the The glitters are made from through authorised Dow Corning sodium ion of the standard. epoxy coated metallic foil, cut distributors . into 1.6 mm squares. They are These new water soluble The sample kit, which in available in bright silver and bright standards, designed specifically cludes samples of water- and gold shades. for molecular weight calibration solvent-based paints, enables in aqueous GPC systems, open paint chemists to test their ne w possibilities in macromole- fomulations on site. The eight cular research as well. Do w Corning paint additive Polystyrene standards samples assist the paint chemist Pressure Chemical Co., in developing their formulations 3419-25 Smallman Street, Pitts for mar resistance, flow out, burgh, P.A. 15201, U.S.A., offers Low bake coating resin debubbling, levelling, pigment a complete line of standards, rang A new 'Beetle' alkyd resin, separation and adhesion. It also ing from M W 800 to M W 2 mil designed primarily for use in low- helps with processing problems lion. Batches which had been de bake systems, is now available whe n using curtain coating and pleted by sales have been re fro m BIP Chemicals Division, P.O. coil coating techniques. placed to provide a full line of 12 Box 11, Tat Bank Road, Oldbury, Als o available free on re polymers. Warley , West Midlands, B69 quest with the sample kit is a These well characterised 4NF, and may be used in combi comprehensive selections of data polystyrenes are of known mole nation with any one of a large sheets on each additive, together cular weight and narrow molecu number of 'Beetle' melamine wit h a guide chart which keys the lar weight distribution. They are resins. Such systems, w e are told, appropriate additive to use to said to be ideally suited for cure well at temperatures around solve a specific paint problem. checking or calibrating instru 90-95° C and then continue to Samples and further details avail ments, and for determining mole post cure at room temperature for able in the U.K. from: Mr M. cular weight in applications such several weeks. All these systems Fontaine, K & K Greeff Industrial as gel permeation chromato have excellent shelf stability. Chemicals Ltd., Suffolk House, graphy, light scattering, osmo Designated BA 549, the new George St., Croydon CR9 3QL. metr y and viscometry. resin has excellent colour stability Continent: Jon Solman, Dow The following weights, and may be used in general pur Corning International, Chaussée molecular, are available:— 800; pose industrial stoving finishes, de la Hulpe, 154, P.O. Box 7, 1170 4,000; 17,500; 110,000; 390,000; in cold cure woo d finishes and in Brussels. 950,000; 2,200; 9,000; 50,000; fast cure finishes for paper and 233,000; 600,000; 1,800,000. other substrates. Sodium polystyrene sulphonates For cold cure systems, Metallic glitters for seamless Using its standard line of lacquers based on BA 549 in coatings polystyrene standards, Pressure combinatio n with urea resins cure Surface coating systems in Chemical Co. has developed a rapidly in the presence of acids, whic h coloured plastic flakes are ne w line of water soluble stan and the resultant films, it is embedded in surface coatings to dards for GPC calibration. As claimed have good resistance to produce decorative effects on evidenced by comparitive GPC, mois t heat and to checking. In floors and walls, are widely used as well as by light scattering, general, lacquers based on BA because of their low maintenance osmometr y and viscometry where 549 cure rapidly and have improv costs. applicable, there is no apparent ed stability and a longer (cata degradation or cross-linking. lysed) pot life when compared In order to enhance their wit h lacquers based on other decorative effect, two metallic The apparent molecular resins. glitters have been introduced by weigh t of these samples is 89 %
Pigment & Resin Technology – Emerald Publishing
Published: Sep 1, 1978
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