Composite biocidal particles

Details Composite biocidal particles Composite biocidal particles

2011-05-17

2011-05-17

Gross, Christopher M (Department: 1636)

Compositions: coating or plastic

Coating or plastic compositions

Contains fireproofing or biocidal agent

C106S018320, C106S018340, C524S432000

Reexamination Certificate

active

07942958

ABSTRACT:
A biocidal composition is disclosed comprising composite particles, each of the composite particles containing a shell and a core, the core comprising a metal or a metal-containing compound wherein the metal is a moiety selected from the group consisting of zinc, copper, bismuth, silver, zirconium, and combinations thereof, the shell comprising a pyrithione adduct comprising the reaction product of pyrithione with a portion of the core metal or metal compound. In one aspect, an anti-fouling composition is disclosed comprising (a) an anti-soft-fouling effective amount of copper pyrithione; and (b) an anti-hard-fouling effective amount of a copper-containing salt, or oxide or hydroxide thereof. The present invention also relates to a method of making an antifouling composition comprising particles of copper pyrithione and a copper-containing salt that is effective against hard-fouling and soft-fouling organisms.

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