A method for preparing a main chain scission-type polysilyl (meth)acrylate resin and application thereof. The method comprises: a cyclic monomer, vinyl monomer and vinyl silyl ester monomer are mixed in a solvent at a formulation ratio, then added a composite initiator in a mass percentage of 0.01-5% based on the total amount of the monomers, and reacted at a temperature of 25-150 C., and under the protection of argon or nitrogen gas, so as to prepare the main chain scission-type polysilyl (meth)acrylate resin, wherein the monomers are consisted of 5-95% by mass of cyclic monomer, 0-90% by mass of vinyl monomer and 5-95% by mass of vinyl silyl ester monomer. The resulting resin can not only be hydrolyzed on the side chain silyl ester segment under the effect of the sea water, but also occur chain scission on the main chain polyester segment under the effect of the seawater, so as to solve the dependency of the traditional self-polishing material on the sailing speed, effectively control the release of the antifouling agent at a constant rate, ensure the active substance preserved on the coating surface of the ships, and properly meet the antifouling requirements on the low sailing speed ships, submarines and off-shore oil platform facilities.

Provided is a method of forming an antifouling coating film including the steps of [1] preparing a colored antifouling paint containing a prescribed Si-containing hydrolyzable resin and a color pigment such that a coating film having a target dry film thickness T completely hides a surface of an object to be coated, the colored antifouling paint has a color difference E1 between the coating film having the thickness T and a coating film having a dry film thickness of 0.8 T, at least 2.0, and preferably the colored antifouling paint has a color difference E2 between the coating film having the thickness T and a coating film having a dry film thickness of 1.2 T, less than 1, and [2] coating a surface of the object with the colored antifouling paint until the surface of the object is completely hidden by the coating film formed from the colored antifouling paint.

Marine coatings including cationic polymers hydrolyzable to nonfouling zwitterionic polymers, coated marine surfaces, and methods for making and using the marine coatings.

The present disclosure relates to a tie-coat composition comprising one or more binder polymers obtainable by copolymerizing a mixture of ethylenically unsaturated monomers, wherein the tie-coat composition provides a tie-coat with good dry adhesion, freshwater adhesion and saltwater adhesion to topcoats based on resins with condensable silane groups such as polydiorganosiloxane resins with hydrolysable groups or organic resins with terminal and/or pendant alkoxysilyl groups. The present disclosure further relates to a process for controlling aquatic fouling on a surface of a man-made object comprising applying such tie-coat composition and a topcoat composition, and to a substrate coated with a tie-coat layer deposited from such tie-coat composition and a topcoat layer.

The invention provides a waterborne fouling release coating composition comprising (a) an aqueous polysiloxane-based binder emulsion, wherein said emulsion comprises polysiloxane-based binder droplets having an average droplet size of 4 to 1000 n; and (b) at least one pigment or filler; wherein the coating composition comprises at least 10 wt % water relative to the total weight of L the composition as a whole.

The composition containing a compound represented by the formula (1) and a compound represented by the formula (2),
R.sup.f1(OX.sup.1).sub.m1OR.sup.f2Y.sup.1[Si(R.sup.1).sub.n1L.sup.1.sub.3-n1].sub.g1(1)
[L.sup.2.sub.3-n2(R.sup.2).sub.n2Si].sub.g2Y.sup.2R.sup.f3(OX.sup.2).sub.m2OR.sup.f4Y.sup.3[Si(R.sup.3).sub.n3L.sup.3.sub.3-n3].sub.g3(2),
where R.sup.f1 to R.sup.f4, X.sup.1 to X.sup.2, Y.sup.1 to Y.sup.3, R.sup.1 to R.sup.3, L.sup.1 to L.sup.3, m1 to m2, n1 to n3, and g1 to g3 are as defined in the disclosure. An article, containing a substrate and a surface layer formed of the composition on the substrate.

An erodible antifouling coating composition for application, for example,to ship's hulls to potentially prevent the adhesion and build up of fouling agents on the hull is described. The coating composition comprises an erodible binder system excluding a triorgano tin based binder; optionally, one or more antifouling agents; and at least one silicone oil. A process for producing the composition, a substrate coated with the composition, and a process of coating a substrate with the composition are also described.

Provided is a silyl polymer-based antifouling coating composition that is capable of forming a coating film in which cracking is inhibited from occurring for a long period from the early stage of immersion in seawater and fresh water and enables to maintain excellent coating film consumption for a long term. The antifouling coating composition includes: a copolymer (A) containing a structural unit (a-1) derived from styrene or the like, a structural unit (a-2) derived from glycidyl (meth)acrylate, and optionally a structural unit (a-3) derived from another ethylenically unsaturated monomer; a polymer (B) containing a structural unit (b-1) derived from a monomer represented by the following Formula (b1):

##STR00001##

wherein X is a hydrogen atom or a carboxyl group; R.sup.1 is a hydrogen atom or a methyl group; R.sup.2 to R.sup.6, which may be the same as or different from each other, are C.sub.1-C.sub.6 straight or branched chain alkyl; and n is an integer of 0 or 1 or more; and an antifoulant.

The present invention relates to the use of polyoxalates as binders for antifouling coating compositions and antifouling coating compositions comprising the polyoxalates.

Marine coatings including cationic polymers hydrolyzable to nonfouling zwitterionic polymers, coated marine surfaces, and methods for making and using the marine coatings.