Solventless coal tar extended antifouling coating

Abstract

Abstract The present invention relates to a novel coating composition which is an effective heavy duty marine antifouling film with significantly subdued human toxicological effects and which comprises a low molecular weight aromatic bitumen or related polyol; a highly polymerizable, or chemically crosslinking, film former (possessing exceptionally low initial molecular weight); and one or more highly toxic organo-metallic compounds. Specifically, the invention allows a unique approach toward formulating an antifouling marine coating which possesses the antifouling properties inherent in the extremely toxic microbiological poisons normally employed in such coatings yet which present a relatively safe working environment for humans. The technological significance rests in the fact that, during the transgression through the film forming phenomena, the design outline herein provides the confinement of the toxic adducts within the coating film, and precludes their migration or atomization to the surrounding atmosphere. The incorporation of a low molecular weight bituminous residue in the present coating affords significant control of film properties of the toxic coating. The unique concept in antifoul coatings drastically alters the concern for adequate ''''dry time'''' before launch because the water sensitivity heretofore experienced in the early stage of curing of solvent releasing coating systems does not exist with this concept.

Inventors

• 👤 H Lomasney
• 👤 W Lomasney

Bibliographic Details