This bulletin is published to keep you posted on BASF Wyandotte key chemicals, their applications, and the many services we offer. You may want to route this to in terested members of your organization. Additional information an d trial quan tities of BASF Wyandotte key chemicals are available upon request... may we serve you? REFRIGERATION INDUSTRY TO BENEFIT FROM
NEW LOW-DENSITY URETHANE FOAM SYSTEM To answer the need for even lower density urethane foams, BASF Wyandotte has developed a new system for frothed and poured insulation applications. This system provides low-density urethane foams with significant cost-performance improvements over conventional systems without sacrificing thermal insulating characteristics, ease of application or dimensional stability. It is expected to particularly benefit manufacturers of refrigeration equipment. They can realize important savings because this system costs no more than conventional urethane systems. Foams with in-place densities as low as 1.5-1.6 pcf. can be produced. Consequently, 25% less weight of foam is required to fill a given cavity than with conventional 2 pcf. foams . . . a significant cost savings. And foams based on this system show excellent resistance to low temperature shrinkage.
Chemicals Outlook
Using the ASTM C177 test method, initial K-factors as low as 0.115 have been obtained with foams based on this new system. Therefore, manufacturers can maintain standard wall thicknesses (cavities) established for urethane insulated equipment. As the system exhibits excellent flowability in refrigerator box cavities plus extended gel times, the foam has ample opportunity to fill voids before curing begins, minimizing possibilities of thermal leaks. Foams based on this system can be poured or frothed using standard techniques and equipment.
MARCH, 1971
Write Department CO for your copy of our data sheet containing suggested operating conditions, foaming characteristics and typical physical properties. UPDATED 5 T H EDITION OF BOOK DETAILS
LATEST FACTS ON PLURAFAC SURFACTANT SERIES "Plurafac® Nonionic Surfactants for Use in Biodegradable Formulations" contains the basic information needed to take advantage of this exclusive series of ten chemically related, 100% active, biodegradable surfactants. Prepared for formulators, this book is designed to help them explore the possibilities these products offer for a variety of cleaning and other types of formulations and presents a range of data to assist in their evaluation. This easy-to-use reference discusses detergency, foaming, wetting, dispersing, solubilizing, emulsifying or demulsifying characteristics . . . plus biodegradability. Charts and graphs present comparative data to help minimize random evaluation. Performance patterns are translated into practical formulations representing many different applications. Grade selection allows formulators to produce liquid, powdered, granulated or tableted products . . . products that range from low to medium-high foam. (Some members of the Plurafac series are the lowest foaming biodegradable nonionics available today.) The book tells how to formulate heavyduty anhydrous products that are dust-free, non-caking and free-flowing. It spells out the individual advantages of each Plurafac grade, including D-25 . . . the liquid surfactant that combines powerful cleaning action with an extremely low pour point (0°F.). Interested in formulations that will successfully compete in the marketplace? Then evaluate the Plurafac series. Send for the 5th edition of our Plurafac book. Write Department CO.
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C&EN MARCH 29, 1971
BASF Wyandotte Corporation Wyandotte, Michigan 48192
