SYNTHESIS OF LOW TEMPERATURE OIL RESISTANT URETHANE ELASTOMERS

Abstract

Urethane and urethane-urea elastomers were prepared and their properties evaluated. The low temperature flexibility specification was met for the first time. This elastomer was prepared by using dioltriol blends which serve as mutual plasticizers reducing the crystallinity of the individual polyols at low tempratures. This approach has produced elastomers with the best low temperature properties. The diolcomponents had a major effect on lowering torsional modulus at -55 C. The type of diisocyanate was varied on a 4500- molecular-weight polyether triol (Pluracol TPE 4542)-o-dichlorobenzidene (DCB), 1/1 NH2/OH ratio elastomers. Quasi prepolymers were prepared for this diisocyanate study in order to obtain liquid diiscyanate components. Properties varied considerably with variation of the diisocyanate. Urethane elastomers containing no urea linkages were evaluated and compared to similar elastomers containing urea linkages.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0403821

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