Patents Represented by Attorney Richard A. Andersen

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  • Alkanolamines to reduce ozone attack on dyes in polyamide fibers
    Patent number: 3984202
    Abstract: When from about 0.4 percent to about 3 percent of an alkanolamine such as: ##EQU1## where R is an alkylene of 1 to 13 carbon atoms, an aralkyl such as xylylene, or cycloalkyl, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are H, alkyl of 1-2 carbon atoms or phenyl wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 can be the same or different, is coated on nylon fiber, improved dyefastness is achieved when the fiber is exposed to ozone.
    Type: Grant
    Filed: October 5, 1973
    Date of Patent: October 5, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Peter Reginald Saunders, Robert Alden Lofquist