ERODIERBARE POLYMERE UND ANSTRICHE ZUR BESCHRAENKUNG DES SCHMUTZES

The present invention relates to a novel polymeric binder for use in an antifouling paint which includes a toxicant. The polymeric binder is film-forming, water insoluble, seawater erodible and is represented by the formula wherein, in one embodiment, X is H or CH3; M is from greater than 2.5 to less than 25 mole percent of a saturated residue of a tributyltin acrylate or methacrylate group; R is a substantially non-bioactive, substituted alkyl, aryl or arylalkyl moiety; and recurring groups B, where B is the residue of an ethylenically unsaturated monomer. The polymer has a hydrolysis rate of at least 5x10 milliequivalents per hour. The resultant paint has an erosion rate of at least 2 microns per month. R can be selected from the group consisting of: wherein Z is NO2, halogen or CN; V is H, NO2, halogen, CN, alkoxy; b) -(CH2)nY wherein n is an integer from 1 to 4; and Y is selected from the group consisting of and wherein R min is C1 to C4 primary, secondary or tertiary alkyl, R sec is H or R min ; R''' is alkyl or an aryl; c) can be -SiR3''' or -Si(OR''') 3; d) R can be a haloalkyl group having at least one trihalomethyl group where the halogen is Br, F, Cl, and the alkyl has at least two carbon, e.g. trifluoroethyl acrylate; e) a quaternized aminoalkyl represented by the formula where Y is Br, Cl or I, R min , R sec and R''' are the same or different C1 to C18 alkyls.