Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1991-09-09
1992-11-24
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 79, C08G 1810, C08G 1832, C08G 1876
Patent
active
051662990
ABSTRACT:
Novel polyurethane-ureas having superior high temperature performance are prepared by reacting an isomeric mixture of 3,5-di(methylthio)-2,6-diaminotoluene and 3,5-di(methylthio)-2,4-diaminotoluene with an alkyl-substituted aromatic diisocyanate prepolymer having a free --NCO content of 0.1-20% by weight, produced by the reaction of a mixture of 2,4- and alkyl-substituted 2,6-aryl diisocyanates with a polyether glycol. The polyurethane prepolymers have a free --NCO content of 2-10% by weight and contain from about 3 to about 20 weight percent of the polyether. These elastomers have good dynamic properties, such as resilience, that make them attractive as roller materials.
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Hawley's Condensed Chemical Dictionary, Eleventh Edition; 1987; p. 1163.
Ethyl Corporation
Hammond Richard J.
Kight III John
Sergent Rabon
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