US 12,480,020 B2
Antifouling coating composition
Soichiro Tanino, Otake (JP); Akino Nabe, Otake (JP); and Yoshihiko Imai, Otake (JP)
Assigned to CHUGOKU MARINE PAINTS, LTD., Otake (JP)
Appl. No. 17/906,125
Filed by CHUGOKU MARINE PAINTS, LTD., Otake (JP)
PCT Filed Mar. 9, 2021, PCT No. PCT/JP2021/009227
§ 371(c)(1), (2) Date Sep. 12, 2022,
PCT Pub. No. WO2021/182454, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 2020-043955 (JP), filed on Mar. 13, 2020.
Prior Publication US 2023/0123769 A1, Apr. 20, 2023
Int. Cl. C09D 183/04 (2006.01); C08K 3/22 (2006.01)
CPC C09D 183/04 (2013.01) [C08K 3/22 (2013.01); C08K 2003/2296 (2013.01)] 10 Claims
 
1. An antifouling coating composition, comprising:
a hydrolyzable copolymer (A) containing an organosiloxane block and a metal ester group, and zinc oxide (B);
wherein the copolymer (A) comprises:
5 to 25% by mass of a constituent unit derived from a metal ester group-containing monomer (a1);
5 to 15% by mass of a constituent unit derived from an organosiloxane block-containing monomer (a2) represented by formula (2); and
a constituent unit derived from a monomer (a3) represented by formula (3); and
a content of the zinc oxide (B) relative to 100 parts by mass of the content of the copolymer (A) is 70 to 200 parts by mass:

OG Complex Work Unit Chemistry
wherein R1, R2, and R3 each independently represent a monovalent hydrocarbon group;
X each independently represent a (meth)acryloyloxyalkyl group or a mercaptoalkyl group;
m is 1 or greater;
n is 0 or greater;
p and q are each independently 0 or 1; and
n+p+q is 1 or greater;

OG Complex Work Unit Chemistry
wherein R41 represents a monovalent group including an ethylenically unsaturated group; and
R42 represents a monovalent hydrocarbon group with 3 to 6 carbon atoms being free of an ethylenically unsaturated group.