초록

A primer useful in the preparation of an anti-fouling surface contains (I) a copolymer formed from acrylates, free carboxyl group containing monomer and an aromatic sulfonic acid or salt, an acrylic polymeric resin and a cross-linking agent.

대표청구항 ▼

1. A composition comprising: (i) a copolymer of (a) 35 to 40 mole % alkyl acrylate, (b) 35 to 40 % alkyl methacrylate, (e) 10 to 15 mole % of a comonomer containing a free carboxyl group, and (d) 15 to 20 mole % of an aromatic sulphonic acid and/or salt thereof; (ii) an acrylic and/or methacryl

1. A composition comprising: (i) a copolymer of (a) 35 to 40 mole % alkyl acrylate, (b) 35 to 40 % alkyl methacrylate, (e) 10 to 15 mole % of a comonomer containing a free carboxyl group, and (d) 15 to 20 mole % of an aromatic sulphonic acid and/or salt thereof; (ii) an acrylic and/or methacrylic polymeric resin; and (iii) a cross-linking agent. 2. A composition according to claim 1 wherein component (i) is present in amounts from about 0.1 to about 15% by weight of the total solids present in the composition; component (ii) is present in amounts of about 0.1 to about 10% by weight of the total solids present in the composition; and component (iii) is present in amounts of about 0.01 to about 3% by weight of the total solids present in the composition.3. A composition according to claim 1 wherein component (i) comprises ethyl acrylate/methyl methacrylate/itaconic acid/p-styrene sulphonic acid and/or a salt thereof in a ratio of 35/35/15/15 mole %.4. A composition according to claim 1 wherein component (i) comprises ethyl acrylate/methyl methacrylate/itaconic acid/p-styrene sulphonic acid and/or a salt thereof in a ratio of 37.5/37.5/10/15 mole %.5. A composition according to claim 1 wherein component (ii) is a copolymer comprising alkyl acrylate monomer units and alkyl methacrylate monomer units.6. A composition according to claim 5 wherein component (ii) is a copolymer comprising ethyl acrylate and methyl methacrylate.7. A composition according to claim 6 wherein component (ii) is a copolymer comprising about 35 to 60 mole % ethyl acrylate, about 30 to 55 mole % methyl methacrylate and about 2 to 20 mole % methacrylamide.8. A composition according to claim 1 wherein component (iii) comprises melamine formaldehyde, wherein the melamine formaldehyde is optionally alkoxylated.9. A polymeric film comprising a substrate of one or more layers of polymeric material and a primer layer, wherein said primer layer is a composition comprising: (i) a copolymer of (a) 35 to 40 mole % alkyl acrylate, (b) 35 to 40 % alkyl methacrylate, (c) 10 to 15 mole % of a comonomer containing a free carboxyl group, and (d) 15 to 20 mole % of an aromatic sulphonic acid and/or salt thereof; (ii) an acrylic and/or methacrylic polymeric resin; and (iii) a cross-linking agent. 10. A film according to claim 9 wherein said substrate comprises one layer.11. A film according to claim 9 wherein said substrate comprises two layers.12. A film according to claim 9 wherein the or each layer comprises a polyester.13. A film according to claim 9 wherein the or each layer comprises a polyester selected from polyethylene terephthalate, polyethylene naphthalate, and a copolyester of terephthalic acid and isophthalic acid with one or more diols selected from the group consisting of aliphatic and cycloaliphatic diols.14. A film according to claim 13, wherein said copolyester is a copolyester of ethylene isophthalate and ethylene terephthalate comprising from 15 to 20 mol % ethylene isophthalate and 85 to 80 mol % ethylene terephthalate.15. A film according to claim 9 wherein the substrate further comprises a UV absorber, wherein the UV absorber may be present in the or any or each layer of the substrate.16. A film according to claim 9 further comprising an additional layer on the surface of the substrate remote from the primer layer, wherein said additional layer comprises a discontinuous layer of an acrylic and/or methacrylic polymeric resin and optionally further comprises a cross-linking agent in amounts of up to 25% based on the weight of the polymer in the additional coating layer.