Patent ID: 6214902
Filing Date: 2001-04-10
Classification: C09D

Abstract:
A nonelution type antifouling method which comprises:applying a nonelution type antifouling coating composition comprising at least two organic polymeric resins insoluble in seawater and incompatible with each other on top of the outermost layer of the underwater portion of a marine structure, the organic polymeric resins occurring in a form dissolved or suspended in a solvent; andforming a coating film having a microheterogeneous structure comprising microdomains of dispersed phase and continuous phase, the microdomains of dispersed phase forming granular or disk-like minute protrusions with a mean diameter of 10 nm to 20 .mu.m formed in situ on the substrate from at least one of the resins on 5 to 49% of the surface area of the coating film wherein the coating composition consists essentially of:i) a dry-setting silicone-grafted acrylic resin having a solubility parameter value of less than 12.5 (cal/cm.sup.3).sup.1/2 ;ii) a one pack setting silicone rubber having a solubility parameter value of less than 12.5 (cal/cm.sup.3).sup.1/2 ;the resins i) and ii) differing from each other in solubility parameter value by 0.3 to 4 (cal/cm.sup.3).sup.1/2 and occurring in a form dissolved or suspended in a solvent and wherein the solubility parameter values are determined by using a solvent spectrum-constituting solvent.