Photostable cationic organic sunscreen compounds and...

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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C564S169000, C558S401000, C424S059000, C424S060000, C424S070900, C424S070110, C424S400000, C424S401000, C424S402000, C252S008570, C252S008810, C132S276000, C106S015050

Reexamination Certificate

active

06936735

ABSTRACT:
Compounds of Formula I:whereinR, R1and R2are each independently hydrogen or linear or branched C1to C10alkyl, or linear or branched C1to C10alkoxy;R3is selected from the group consisting of COCH3, CO2R7, CONH2, CON(R8)2, CN, COX(CH2)n-N—(R4)(R5)(R6), and the quaternized salt form of the formula COX(CH2)n-N—(R4)(R5)(R6)+Y−;X is O or NH;n is an integer of 1 to 5;Y is an anion;R4, R5and R6are independently linear or branched C1to C30alkyl; andR7and R8are independently hydrogen or linear or branched C1-C30alkyl.Sunscreen formulations containing compounds of Formula I, and methods for protecting hair, skin and substrates such as polymers, textiles, fabrics, leathers and paints using the compounds herein.

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