acidfree Ziegler catalysts?
C&EN CHARTS C&EN INDEX OF STOCK PRICES L90 180
July 17,1970
! 170
160
try
T.YZOR titanates Every chemist worth his salts knows that typical Ziegler (or coordination) catalysts for olefin polymerization are Al/Ti compounds. But that doesn't mean you have to start with titanium halides to make a batch of usable catalyst. You could begin with a titanium alkyoxide and still end up with just the right Al/Ti ratio for the reaction at hand. Why use titanates? Not to reduce, but to eliminate the corrosive metallic halide components. Materials-of -construction concepts can be radically changed. Think of the investment savings; think of the maintenance savings! With titanium esters you get all the benefits of coordination catalysts without halide corrosion. Besides, TYZOR organic titanates are handy to have around, and not just for polymerizing olefins. They're effective with other monomeric building blocks, too: esters, silicones, urethanes, alcohols. Besides keeping acids out of reactions, they can also limit unwanted side reactions, speed up cure times, and polymerize at lower temperatures. Send us the coupon, and we'll send you our technical bulletin on TYZOR organic titanates. Maybe you can use an acid-free Ziegler catalyst some day. Du Pont Company /*' Room 8770 Wilmington, Delaware 19898 Please send me your technical bulletin on TYZOR organic titanates. Name Title Company Address City
State
Zip
Wfl$t> TYZOR* "EG U S PAT O f *
22 C&EN JULY 27, 1970
organic titanates
140
Kxi
BIG 7
130
120
21 OTHERS
C&EN Indexes Big 7 chemicals Other 21 chemicals Drugs Petroleum Rubber Standard & Poor's 425 Industrials Price/earnings ratio, chemicals Dividend yield, chemicals
Year aeo
Month ago
160.4 296.1 721.7 378.4 473.2 215.1 15.3
143.2 214.9 666.0 265.6 368.4 338.4 13.2 4.67%
4.20%
Latest week
150.4 214.0 667.9 278.9 373.5 340.2 13.9 4.45%
Companies that make up the C&EN Index of Stock Prices categories are: • Big 7—Allied Chemical, American Cyanamid. Ceianese, Dow, Du Pont, Monsanto, and Union Carbide. • 21 Others—Air Products, Air Reduction, Atlas, Cabot. Chemetron, Commercial Solvents, Diamond Shamrock, Ethyl, GAF, Grace, Hercules, Inmont, Mallinckrodt, Nalco, National Starch, Pennwalt, Reichhold, Rohm and Haas. Stauffer, Sun Chemical, and Witco. • Drugs— Abbott Laboratories, American Home Products, Merck, Parke-Davis, Pfizer. Richardson-Merrell, Schering, Smith Kline & French, Sterling, and Upjohn. • Petroleum—Atlantic Richfield, Continental Oil, Gulf Oil, Mobil Oil, Phillips, Shell Oil, Standard Oil (Calif.), Standard Oil (Ind.), Standard Oil (N.J.), Sun Oil, Texacor and Union Oil of California. • Rubber—Firestone, General Tire, Goodrich, Goodyear, and Uniroyal.
