Document aB4vZoqNXxd7vD2a1Xad9NjZb

problem To meet ethylene consumer demand for a produce chat is essentially free of acetylene. solution GlKDLER developed catalysts to selectively hydrogenate the acetylene in the presence of the ethylene. Acetylene con tent was cut more than 99% giving consumers what they wanted: Ethylene with less than 50ppm of Acetylene Girdler will gladly help solve your catalyst problems. WRITE... GIRDLER A DIVISION or NATIONAL CYUNOCA 0*1 COMPANY 60s Procossst DiWiiM LOUISVILLE 1, KENTUCKY Ntw YORK* TULSA SAN FRANCISCO SPECIALTIES i Update on an Amine Just about as proud of Scientific* Oil Compounding Co/s new Copper Cunimene as its inventor is Hercules Pow der Co. For while the novel antifungal agent is an effective addition to Scien tific's line of preservatives, it means another valuable derivative based on Hercules' Rosin Amine D. Introduced about eight years ago, Rosin Amine D and its derivatives have caught on well-the original plant lias been outgrown, and early this year Hercules put into operation a $1-mil lion plant in Hattiesburg, Miss. Now, with that plant in smooth production, it's opening a brisk new campaign to find more outlets for RAD, and it looks to specialties makers for those markets. phosphate ores. It prevents separalk \ of asphalt and gravel under wet co; ; ditions when it is used as an "am stripping" agent in cutback (thinned asphalt paving materials. In the manufacture of paints \v inks, RAD serves as wetting and dia persing agent, and for pigment flui irig. Polyrad and RADA have bet, used as textile wetting agents. These are only a few of the mam uses for RAD and its derivatives de veloped so far. Their variety illustrate again the way cationics get the offbe.u jobs (CW, Oct. 9,, p. 74), and Her cules hopes they're signposts for ap-: plications yet to come. A high-molecular-weight nitrogen compound based on rosin, Rosin Amine Limit on Lead D is a cationic surface-active agent. Paintmukers got a new regulation to Besides the products developed by | others, Hercules has itself made a num follow, and city health departments a matter for study, with New York City's ber of other derivatives of RAD: the acetate (RADA), several fatty acid salts, and, more recently, a group of ruling last week that paint sold there must carry a warning label if its lead content is more than 1%. 10 ethylene oxide adducts it tags Poly The edict, which is designed to elim rads. Polyrads have been particularly successful; they now make up a large inate lead as a pigment (the term *W per cent" will still permit incorpora part of the output of the Hattiesburg plant. tion of lead driers), specifically applies to paints that are not clearly labeled So far, most developments with as exterior coatings. The rule is in the these amine products have been along form of an amendment to the city's three lines--biocidal activity, surface Sanitary Code. activity, and corrosion inhibition: Purpose of the regulation is to re Besides Copper Cunimene, the duce the hazards associated with un copper complex worked out by Scien knowing use of lead-containing paints. tific Oil, RADA has been used success Since 1950, the health department fully as a preservative, it is generally says, some 49 deaths have resulted used to protect protein solutions, such from lead poisoning. The fatalities, as go into wallpaper coating composi all children, apparently came about tions. Another form, the pentachloro- when the children nibbled repainted phenol salt, is now sold by some 10 surfaces (from home-painted furniture formulators for preserving celiulosic or toys). materials; its major limitation is that The paint industry has until next exposure to sunlight destroys its ac May 1 to comply with the regulation tivity (unless protected by a vinyl or rubber coating). --either relabel or reformulate to re duce lead content. Richard Eckart of Several makers of industrial the National Paint, Varnish and Lac cleaning compounds have taken advan quer Assn., an industry representative tage of Polyrad's ability to inhibit attending the department meeting hydrochloric acid--it can be used in when the ruling was made, pointed toilet bowl cleaners, etc. Similarly, out that already many paints do not it is used as an inhibitor in oil well contain lead, and that manufacturers acidizers, and in pumping wells to pro will seek ways to further curb its use. tect tubing and casing. Guidepost: Although the ruling is Hercules is currently courting oil strictly a local matter now. New York's refiners: it is selling its Polyrad as an health department says it hopes the inhibitor for corrosive hydrocarbons. regulation will be a model for other Injected directly into refinery lines, it cities and states. lowers corrosion in condensers, re For complete details on the Sani boilers, and fractionating columns. tary Code amendment, paint manu Surface activity of RADA has facturers should contact Jerome Trich- accounted for some applications, too. ter, assistant commissioner, New York It is used as a flotation agent in the City Board of Health, Room 316, 125 separation of silica from feldspar and Worth St, New York, N.Y. N39122 Chemical Week November 13, 1954