M&t Chemicals, Inc.

Ppg Industries, Inc.

David B Russell

Melvin H Gitlitz

Howard H Leiner

Abe Berger

Mo A Khuddus

John R Bednarski

Thomas J Doran, Jr

A novel polymeric binder for use in an antifouling paint includes an acrylic or methacrylic ester monomer having selected substituted aryl or arylalkyl substituent groups in the ester moiety so that the ester is hydrolyzable at a suitable rate in seawater, and a copolymerizable ethylenically unsaturated monomer unit.

Erodible ship-bottom paints for control of marine fouling

A novel polymeric binder for an antifouling paint includes greater than 2.5 to less than 25 mole percent of a unit from a tributyltin acrylate or methacrylate monomer group, an acrylic or methacrylic ester monomer unit having selected substituent groups in the ester moiety so that the ester is hydrolyzable at a suitable rate in seawater, and a copolymerizable ethylenically unsaturated monomer unit. The presence of the hydrolyzable ester group in the polymer binder of the present invention enables the paint to erode at a desired rate in seawater even with the low tin content in the polymer, thereby providing a desired low level of tin in solution and exposing a fresh paint surface periodically.

Erodible terpolymer from tributyl tin acrylate or methacrylate and

The durability of coatings formed from antifouling compositions containing a biologically active organotin-containing polymer as the film-forming component is improved by the presence of at least one biologically inactive organotin-containing polymer in an amount of from 0.01 to 10% based on the weight of the initial coating composition.

Antifoulant composition and method

The undesirable swelling exhibited by biologically active copolymers wherein a portion of the repeating units exhibit a triorganotin moiety (R.sub.3 SN--) is reduced by incorporation of a cross-linking agent into the copolymer. The physical and chemical properties of the cross-linked copolymers make them more suitable for use as biocides particularly antifouling toxicants, than polymers described in the prior art.

Biologically active triorganotin copolymers

The undesirable swelling exhibited by biologically active copolymers wherein a portion of the repeating units exhibit a triorganotin moiety (R.sub.3 Sn--) is reduced by incorporation of a cross-linking agent into the copolymer. The physical and chemical properties of the cross-linked copolymers make them more suitable for use as biocides particularly antifouling toxicants, than polymers described in the prior art.

Novel biologically active copolymers

Biologically active copolymers wherein a portion of the repeating units exhibit a triorganotin moiety (R.sub.3 Sn--) are prepared by solution polymerization using liquid aliphatic or cycloaliphatic hydrocarbons as the polymerization medium. The physical and chemical properties of the copolymers make them more suitable for use as biocides than polymers prepared using methods described in the prior art.

Method for preparing biologically active copolymers of triorganotin

Abrasion-resistant vulcanized rubber compositions which are also resistant to heat build-up are provided which are useful as tire treads and subtreads for vehicles, e.g., automobiles. The compounds comprise the vulcanizate of a rubber polymer, a finely-divided reinforcing siliceous pigment, and an organic coupling agent having at least one nitrogen functional group that bonds to the siliceous pigment and at least one sulfur functional group that bonds to the rubber polymer.

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Westfield, NJ, United States of America

David B Russell