Preparations based on copper pyrithione (CAS RN 14915-37-8

Paints containing the small particle copper pyrithione exhibit improved antifouling performance on cold water, as compared to paint containing larger particle copper pyrithione.

The antimicrobial composition can also contain co-biocides, such as pyrithiones, including zinc pyrithione or copper pyrithione.

Paints containing the small particle copper pyrithione exhibit improved antifouling performance in cold water, as compared to paint containing larger particle copper pyrithione.

The present invention relates to a process for producing a gel-free dispersion or solution of copper pyrithione by an ion-exchange reaction using a reaction mixture of a copper salt and a pyrithione salt in the presence of at least one surfactant.

Preferably, the antifouling agents include the first antifouling agent and a second antifouling agent selected from zinc pyrithione, copper pyrothione, pyridine triphenylborane, and the like.

Products containing copper pyrithione shall not be authorised for or used by non-professional users.

The dispersion is suitably employed as an antifouling additive for marine paints without risking worker exposure to copper pyrithione dust.

Bis(1-hydroxy-2(1H)-pyridinethionato-O,S)copper(II) (hereinafter referred to as copper pyrithione) is a sparingly water-soluble compound separating out of a reaction system employing an aqueous medium.

approving copper pyrithione as an existing active substance for use in biocidal products for product-type 21

The dispersion is suitably employed as an antifouling additive for marine paints without risking worker exposure to copper pyrithione dust.

It is therefore appropriate to approve copper pyrithione for use in biocidal products for product-type 21 subject to compliance with the specific conditions in the Annex.

Copper pyrithione is approved as an active substance for use in biocidal products for product-type 21, subject to the specifications and conditions set out in the Annex.

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.