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20 PIGMENT AND RESIN TECHNOLOGY DECEMBER 1980 schedules and industrial and marine lisers and fluidising agents. They New compounding concept for conditions . allo w the ink maker to increase pig polychloroprene It is also claimed that the ment concentration (more than Ancho r Chemical (UK) Ltd., improve d dispersion properties of twic e the normal level in some Clayton Lane, Clayton, Manchester 'F-Grade ' chrome pigments offer cases) at the millin g stage and allow M1 1 4SR, has announced the in savings in processing times and troductio n of Rapiblend 1793 to millin g in solvent rather than in resin they can be milled quickly and their range of predispersed rubber solutio n to give a concentrate for efficiently in any conventional paint- chemicals . use in a wide variety of inks. It is makin g machinery, yielding paints further claimed that excellent flow is Rapiblend 1793 is specifical wit h excellent gloss. Prolonged mil ly designed for use in polychloro maintaine d and extra strength (up to ling , which can result in dullness prene compounds, and is essentially 20%) , improved gloss and 'lay' are and damage to surface coatings on a predispersion in stiff putty form obtained . Alternatively, pigment the pigment wit h consequent loss in of zinc oxide, magnesium oxide and manufacturers can treat pigments durability , becomes unnecessary. an alkylated diphenylamine antioxi wit h 'Solsperse' agents to give simi dant in the ratio 5:4:2 . This The first three products in lar advantages. ratio of additives is used in a great troduce d by ICI in this range are Hyper-dispersants are inte majorit y of polychloroprene com Lemon Chrome F-H4G, Middle gral constituents of ICI's well-estab Chrome F-HG and Middle Chrome pounds , and the advantage of lished NAD (non-aqueous disper Rapiblend 1793 is that by utilising F-HR. Grades suitable for high per sion) forms of Monastral Blue BG the antioxidant as the predispersion formanc e plastics applications — whic h have been in wide use by binder , the compounder is offered a especially PVC and GRP gel coats publicatio n gravure ink makers for —ar e also available in the Vynamon predispersed product which is many years. The 'Solsperse' agents virtuall y 100% active and dual pur GF (gas fast) range of pigments have been developed in the research pose. fro m ICI. laboratories of ICI Organics Division and are manufactured at the Divi Hyper-dispersants for ink sion's Huddersfield Works. High-performance chromes manufacture The first three products in A new range of products a new range of chrome pigments, Versatile methacrylate intermediate whic h are claimed to increase pro designed especially for high- BP Chemicals has just ductivit y and formulating flexibility performance industrial paints, have launched Bisomer HEMA—a versa in the manufacture of printing inks been introduced by ICI Organics til e intermediate of particular use in is at an advanced stage of market Division , Blackley, Manchester M9 the preparation of high quality development by ICI Organics Divi 3DA . acrylic paints for the automotive in sion , Blackley, Manchester M9 3DA. The new products, 'F-Grade' dustry . The products are claimed to chrome pigments, are treated with Bisomer HEMA (2-hydroxy- be based on unique ICI dispersion the latest surface-coatings deve ethyl methacrylate) is claimed to technology . They interact with pig loped by ICI to give improved provid e better protection against ment surfaces but are said to differ properties in high-grade paints. In scratching , especially for vehicle fro m conventional surfactants in that additio n to the high opacity, bright underbodies, and gives a better ness of shade and fastness to heat they are designed for use in the non shine in metallic paints. It can also and solvents which are typical of aqueous solvents of printing inks, be used in primers for rust preven chrome pigments, the 'F-Grade' pro are exceptionally effective and do tio n on steel. ducts are said to have improved not degrade lithographic behaviour. durabilit y and dispersion properties, T o distinguish these pro It can be copolymerised with outstandin g resistance to sulphur ducts from conventional surfactants, many other vinyl monomers and dioxid e and good acid-spot resis ICI have devised the name 'hyper- finds uses in a number of industries. tance. dispersants'. They are being intro The printing industry uses photo ICI state that these charac duced to ink-makers—initially in sensitive resin compositions derived teristics make 'F-Grade' chrome Europe — under the 'Solsperse' fro m Bisomer HEMA for relief print pigments particularly suitable for trade-mark. The products or derived ing plates, lithograph plates and demandin g applications such as car dispersions are the subject of photoresists. paints , refinishes, coil coatings and patents or patent applicants in in Details : BP Chemicals Ltd, transport finishes where stability dustrialise d countries. Small Tonnage Chemicals Division, an d colour retention is required 'Solsperse ' agents function Belgrave House, 76 Buckingham under the most severe paint-stoving as milling aids, dispersion stabi Palace Road, London SW1W 0SU.
Pigment & Resin Technology – Emerald Publishing
Published: Dec 1, 1980
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