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1. WO2018134124 - FOUL RELEASE COATING COMPOSITION, SUBSTRATE COATED WITH SUCH COATING COMPOSITION, AND USE OF SUCH COATING COMPOSITION

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[ EN ]

Claims

1 . A non-aqueous liquid foul release coating composition for controlling aqueous biofouling on man-made objects comprising:

i) a moisture curable polysiloxane comprising repeating units of formula (I)


and at least one terminal or endant group of formula (II)


wherein R1 and R2 are, independently, organic groups having 1 to 20 carbon atoms; R3 and R4 are, independently, organic groups having 1 to 20 carbon atoms; A is an organic group having 1 to 50 carbon groups; R5 is, independently, selected from organic groups having 1 to 20 carbon atoms and groups of the formula O-R6 wherein R6 is an organic group having 1 to 20 carbon atoms, with the proviso that at least one R5 is a group of the formula O-R6; and at least one of a marine biocide or a non-volatile component comprising units selected from hydrocarbyl, heterocarbyl, halocarbyl, ether, ester, amide, ketone, siloxane, urethane or urea groups.

2. The foul release coating composition according to claim 1 , wherein the coatin composition further comprises an aminosilane of formula (III)


wherein R3 to R5 and A are defined as in claim 1 , and wherein at least one R5 is a group of the formula O-R6, wherein R6 is an organic group having 1 to 20 carbon atoms.

3. The foul release coating composition according to claim 1 or 2, wherein component ii) does not contain groups of formula (II).

4. The foul release coating composition according to any one of the

preceding claims, wherein A is a methylene group.

5. The foul release coating composition according to any one of the

preceding claims, wherein each of R1 and R2 is, independently, a methyl group or a phenyl group.

6. The foul release coating composition according to any one of the

preceding claims, wherein R5 is selected from Ci to C4 alkoxy groups, preferably ethoxy groups.

7. The foul release coating composition according to any one of the

preceding claims, wherein the coating composition is essentially free or entirely free of a marine biocide.

8. The foul release coating composition according to any one of the preceding claims, wherein the coating composition comprises a volatile organic solvent.

9. The foul release coating composition according to any one of the

preceding claims, wherein the non-volatile content is in the range of 70 to 100 % by weight.

10. A substrate coated with a foul release coating composition according to any one of the preceding claims.

1 1 . A substrate according to claim 10, wherein the substrate is coated with a multi-layer coating system comprising:

optionally a primer layer applied to the substrate and deposited from a primer coating composition;

a tie-coat layer applied to the substrate or to the optional primer layer, deposited from a tie-coat composition comprising an binder polymer with curable alkoxysilane functional groups; and a topcoat layer applied to the tie-coat layer, the topcoat layer deposited from a liquid foul release coating composition according to any one of claims 1 to 9.

12. A substrate according to claim 10 or 1 1 , wherein the tie-coat composition comprises a polyacrylate with curable alkoxysilane functional groups.

13. A process for controlling aquatic biofouling of a man-made object,

comprising the steps of:

a) applying the foul release coating composition according to anyone of the preceding claims 1 to 9 to at least a part of the surface of the man-made object;

b) curing the coating composition to form a cured coating layer; and c) immersing the man-made object at least partly in water.

A process according to claim 13, further comprising the step of applying a tie-coat layer deposited from a tie-coat composition as specified in claim 1 1 or 12 on the at least part of the surface of the man-made object before applying the foul release coating composition.

Use of the foul release coating composition according to any one the preceding claims 1 to 9 to control aquatic biofouling on man-made objects.