Organotin polymers method of making them and paints containing them
AssigneeBerger, Jenson & Nicholson Limited
InventorsDavid H. Tooke-Kirby, Richard E. Perry, Kenneth H. Arbuckle
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Abstract
Organotin polymers for use in marine anti-fouling paints contain pendent groups having the general formula --O.CO.R.sup.1 CO.OSnR.sub.3 where R is C.sub.1 to C.sub.10 alkyl, aryl, aralkyl or alkaryl, and R.sup.1 is a saturated or unsaturated aliphatic or aromatic C.sub.2 to C.sub.10 group. The polymer may be made by reacting a hydroxyl-containing polymer, e.g. styrene/allyl alcohol, with a carboxylic acid anhydride under ring-opening conditions and reacting the resulting carboxyl-containing polymer with an organotin compound.
Claims10
An organotin polymer suitable for use in marine anti-fouling paints, derived from a hydroxyl-containing polymer having a hydroxyl value of from 50 to 400, containing pendent groups having the following general formula:
- --O.CO.R.sup.1 CO.OSnR.sub.3
- where R is C.sub.1 to C.sub.10 alkyl, aryl, aralkyl or alkaryl and R.sup.1 is a saturated or unsaturated aliphatic or aromatic C.sub.2 to C.sub.10 group.
A marine anti-fouling paint comprising film-forming resin including an organotin polymer containing 10% to 25% by weight of tin in an amount to provide from 2% to 15%, by weight on the weight of the paint, of tin,
- wherein the organotin polymer is derived from a hydroxyl-containing polymer having a hydroxyl value of from 50 to 400 and contains pendent groups having the following general formula:
- --O.CO.R.sup.1 CO.OSnR.sub.3
- where R is C.sub.1 to C.sub.10 alkyl, aryl, aralkyl or alkaryl, and R.sup.1 is a saturated or unsaturated aliphatic or aromatic C.sub.2 to C.sub.10 group.
Dependencies are inferred from the claim text.