Witco i s the problem solver. Take specialty polyester resins for urethanes* You may know precisely which one you need. Maybe you developed it yourself. The problem—getting it made. Or—let's say you know what requirements the polyester should meet but you haven't found the right product yet. The problem—getting recommendations that aren't just stock answers. The solutions?
Witco can make almost any hydroxyl— terminated, saturated polyester—linear or non-linear. We've been varying molecular weights, glycols and dibasic acids for years. We know how to optimize these tricky reactions for your requirements! And exacting control of finished products is a point of pride with us . . . having built our reputation on our ability to manufacture quality, uniform material on a custom, as well as stock-item, basis. Witco's Organic Division has been mak-
ing polyesters for urethanes just about as long as anyone. Today, turns out tons and tons and tons week after week. So let us in on your problem (in confidence) . Our wide range of polyesters available from stock could hold the best solution—often does. But if not, it's off to our urethane development lab. What's one more problem to the problem solver but another one to grow on! Witco Chemical, Organics Division, Dept. R-10, 277 Park Avenue, New York, N. Y. 10017.
