This bulletin is published to keep you posted on Wyandotte key chemicals, their applications, and the many services Wyandotte offers. You may want to route this to interested members of your organization. Additional information and trial quantities of Wyandotte key chemicals are available upon request . . . may we serve you?
Experimental polyol looks promising for urethane polymers with low hardness and low modulus A high molecular weight polyether triol, called Experimental Polyol 220, has been developed by Wyandotte for use in urethane sealants.
Chemicals Outlook JUNE, 1964
Because Polyol 220 helps form fully cured systems that remain soft and stretchable (but not tacky) over prolonged periods of outdoor exposure, sealants based upon it will not pull away from substrates. This makes Polyol 220 especially useful in formulating one-component urethane architectural sealants. The aging characteristics of Polyol 220 compare favorably with such elastic sealants as the polysulfides, yet cost is surprisingly lower. In addition to low modulus and low hardness, Polyol 220 provides good resistance to abrasion and weather. Sealant formulations with Polyol 220 give 100% moduli values below 100 psi, offer permanent pliability at temperatures below 0° F. Polyol 220 is available in commercial quantities. Samples and additional information will be sent upon request. We'll be glad to work with you, providing typical formulations, if you will state the use conditions for the sealant you wish to develop.
Tri-MP reduces curing time for one-component urethane coatings and sealants In order to minimize dirt pick-up and the chance of mechanical damage, it is often desirable to speed up the curing rate of onecomponent, moisture-curing materials after application. Wyandotte laboratory tests show that Tri-MP (1,2,4-trimethylpiperazine) is an excellent catalyst for doing just that, without impairing package stability. Concentrations of 0.5% or less of Tri-MP, based on the urethane prepolymer content, are recommended. When carefully prepared, such one-component coatings and sealants have been found to be stable in viscosity after 90 days at 75° F. However, it is suggested that storage stability tests be run on each specific formulation. Tri-MP is a high-boiling liquid, offering the advantages of handling ease, low vapor pressure at polymerization temperatures, low odor level, and comparatively low cost. Samples of Tri-MP along with technical and price data, are available. Address your inquiry to Department CO.
New 24-page book on polyethylene glycols This new book is the most extensive compilation of information to date on the ten grades in Wyandotte's PluracoT E Series of polyethylene glycols. It details properties, contains handling and storage information, and discusses applications in pharmaceuticals, cosmetics, metals, rubber, paper, textiles, inks, and other industries. Write Department CO for your free copy.
WYAIM O OTTE INDUSTRIAL CHEMICALS DIVISION Wyandotte, Michigan • Offices in principal cities SODA ASH • CAUSTIC SODA • BICARBONATE OF SODA • CALCIUM CARBONATE • CALCIUM CHLORIDE • CHLORINE • LIME GLYCOLS (Including Ethylene, Methylene, Polyethylene, Propylene, Polypropylene) • URETHANE INTERMEDIATES • SODIUM CMC SURFACTANTS
•
ETHYLENE OXIDE
•
PROPYLENE OXIDE
•
ETHYLENE DI CHLORIDE
•
PROPYLENE Dl CHLORIDE
DICHL0R0D1METHYLHYDANT0IN • PIPERAZINES • DICHL0R0ETHYL ETHER • OTHER ORGANIC AND INORGANIC CHEMICALS
20 C & E N
4
