Title: Process for extending the life of an antifouling paint film

Abstract: A process for extending the life of an antifouling paint film which comprises applying onto an antifouling paint film a coating of a water-permeable graft polymer prepared by polymerizing one or more vinyl monomers in the presence of a hydrophilic polymer. The coating of the water-permeable graft polymer has an excellent water-resistance and a proper water-permeability by which an antifouling agent contained in the antifouling paint film can be leached into sea water and moreover the leaching rate can be controlled. As a result, the antifouling property of the paint film is exhibited for a long period of time.

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Inventors: Yoshida, Morio (Kawanishi, JP)
Asato, Ikuo (Osaka, JP)
Semba, Toru (Hirakata, JP)
Murase, Kiyoshi (Amagasaki, JP)

Application Number: 900778
Filing Date: 1978-04-28
Publication_date: 1979-09-11
Assignee: Toa Paint Company, Ltd. (Osaka, JP)
Primary Class(es): 427/407.3 114/67R, 427/408, 427/409, 427/412.5, 428/522, 428/907
Other Classes:
US Patent Ref:

3990381	Nov, 1976	Shepherd et al.	106/15.
4021392	May, 1977	Milne et al.	427/409.

Other Refs:
Primary Examiner: Lawrence, Evan K.
Assistant Examiner:
Attorney: Armstrong, Nikaido, Marmelstein & Kubovcik