Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1989-09-29
1991-10-22
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524101, 524191, C08K 53492
Patent
active
050596470
ABSTRACT:
A spandex fiber is provided with discoloration resistance by a synergistic combination of a hydroxyphenyl-1,3,5-triazine ultraviolet light absorber and N,N-dialkylsemicarbazide groups, the groups being attached to the ends of the spandex polymer or as a substituent of an additive.
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Research Disclosure, No. 14428, "Improved Elastomeric Yarn" (Apr. 10, 1976).
E. I. Du Pont de Nemours and Company
Hoke Veronica P.
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