Polymer-containing composition and antifouling coating composition

Patent metadata

Field	Value
Publication number	US-11732144-B2
Application number	US-202117167322-A
Country	US
Kind code	B2
Filing date	Feb 4, 2021
Priority date	Jul 5, 2016
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

Provided is an antifouling coating composition, which can form a coating film having good hardness and good physical properties and having a wear degree appropriate for expressing a long-term antifouling effect, has a viscosity not being excessively high, and makes it possible to reduce a content of volatile organic compounds, and a polymer-containing composition which is suitable for obtaining the antifouling coating composition. The polymer-containing composition contains a (meth)acryl-based copolymer (A-1), in which the (meth)acryl-based copolymer (A-1) contains a constitutional unit (U11) or a constitutional unit (U12) having carboxylate forming an ionic bond with a divalent metal atom, and has a weight-average molecular weight of 1,000 to 5,000, and the polymer-containing composition has a coating film hardness (Martens hardness) equal to or higher than 2.5 N/mm2.

First claim

The invention claimed is:

1. A polymer-containing composition comprising:
a (meth)acryl-based copolymer (A-1),
wherein the (meth)acryl-based copolymer (A-1) contains a constitutional unit (U11) represented by Formula (11), a constitutional unit (U12) represented by Formula (12), or both, and has a weight-average molecular weight of 1,000 to 5,000, and
the (meth)acryl-based copolymer (A-1) contains a constitutional unit (U3) in addition to the constitutional unit (U11), the constitutional unit (U12), or both, and
the constitutional unit (U3) contains 2% to 50% by mass of a constitutional unit derived from a monomer (u3-1) having a substituted or unsubstituted alicyclic functional group, based on a total mass of the constitutional unit (U3),
wherein a coating film hardness of the polymer-containing composition is equal to or higher than 2.5 N/mm 2 ,
—(C═O)—O-M-O—(C═O)—  (11)

—(C═O)—O-M-R 32   (12)

wherein R 32 represents an organic acid residue, and M represents a divalent metal atom.

2. The polymer-containing composition according to claim 1 ,
wherein the monomer (u3-1) having a substituted or unsubstituted alicyclic functional group is a substituted or unsubstituted alicyclic (meth)acrylate.

3. The polymer-containing composition according to claim 1 ,
wherein the monomer (u3-1) having a substituted or unsubstituted alicyclic functional group is at least one selected from the group consisting of isobornyl (meth)acrylate and cyclohexyl (meth)acrylate.

4. The polymer-containing composition according to claim 1 ,
wherein the monomer (u3-1) having a substituted or unsubstituted alicyclic functional group is at least one selected from the group consisting of isobornyl methacrylate and cyclohexyl methacrylate.

5. The polymer-containing composition according to claim 1 ,
wherein a constitutional unit whose proportion in the constitutional unit (U3) is equal to or higher than 30% by mass is derived from a monomer whose corresponding homopolymer has a Tg equal to or higher than 50° C.

6. An antifouling coating composition comprising:
the polymer-containing composition according to claim 1 .

7. The antifouling coating composition according to claim 6 , further comprising:
an antifouling agent.

Assignees

• Mitsubishi Chem Corp

Inventors

• Taniguchi Kana
• Katsumata Sho
• Nakamura Junichi
• Kanazawa Nobuaki

Classifications

• C09D5/1668 Primary

  Vinyl-type polymers · CPC title

• C08K3/22 Primary

  of metals · CPC title

• C08K3/346

  Clay · CPC title

• C08K5/36

  Sulfur-, selenium-, or tellurium-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• C08K5/55

  Boron-containing compounds {(C08K5/0091 takes precedence)} · CPC title