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CN-122029243-A - Antifouling coating composition and antifouling coating film

CN122029243ACN 122029243 ACN122029243 ACN 122029243ACN-122029243-A

Abstract

Disclosed is an antifouling paint composition comprising a silicon-containing resin and a thermoplastic resin other than the silicon-containing resin, wherein the silicon-containing resin comprises a structural unit (A) having at least 1 silicon-containing group selected from the group represented by formula (I), the group represented by formula (II), the group represented by formula (III) and the group represented by formula (IV), the thermoplastic resin comprises a thermoplastic resin having a weight-average molecular weight of 1000 or more, and the content of the thermoplastic resin having a weight-average molecular weight of 1000 or more is 6.0 parts by mass or more and 11.0 parts by mass or less relative to 100 parts by mass of the silicon-containing resin.

Inventors

  • YAMADA NAOTO
  • SHI ZHIGUANG
  • TOMIYAMA SOICHIRO

Assignees

  • 日本油漆船舶涂料公司

Dates

Publication Date
20260512
Application Date
20241016
Priority Date
20231018

Claims (12)

  1. 1. An antifouling coating composition comprising a silicon atom-containing resin and a thermoplastic resin other than the silicon atom-containing resin, The silicon atom-containing resin comprises a structural unit (A) which has at least 1 silicon atom-containing group selected from the group represented by the following formula (I), the group represented by the following formula (II), the group represented by the following formula (III) and the group represented by the following formula (IV); The thermoplastic resin comprises a thermoplastic resin having a weight average molecular weight of 1000 or more; The content of the thermoplastic resin having a weight average molecular weight of 1000 or more is 6.0 parts by mass or more and 11.0 parts by mass or less with respect to 100 parts by mass of the silicon atom-containing resin; [ chemical formula 1] In the formula (I), a and b each independently represent any integer from 2 to 5, m represents any integer from 0 to 50, n represents any integer from 3 to 270, R 1 ～R 5 each independently represents alkyl, alkoxy, phenyl, substituted phenyl, phenoxy or substituted phenoxy; [ chemical formula 2] In the formula (II), c and d each independently represent any integer of 2-5, p represents any integer of 0-50, R 6 、R 7 and R 8 each independently represent alkyl, R a or R b ; R a is [ Chemical formula 3] Wherein x represents any integer of 0 to 200, R 23 ～R 27 are the same or different and represent alkyl; r b is [ Chemical formula 4] Wherein y represents any integer of 1 to 200, R 28 and R 29 are the same or different and represent alkyl; [ chemical formula 5] In the formula (III), e, f, g and h each independently represent any integer from 2 to 5, q and s each independently represent any integer from 0 to 50, R represents any integer from 3 to 270, R 9 ～R 12 each independently represents alkyl, alkoxy, phenyl, substituted phenyl, phenoxy or substituted phenoxy; [ chemical formula 6] In the formula (IV), i, j, k and l each independently represent any integer of 2 to 5, t and u each independently represent any integer of 0 to 50, v and w each independently represent any integer of 0 to 70, and R 13 ～R 22 are the same or different and represent alkyl.
  2. 2. The antifouling paint composition according to claim 1, wherein the silicon atom-containing resin further has a structural unit (B) having a triorganosiloxycarbonyl group.
  3. 3. The antifouling paint composition according to claim 1 or 2, further having a structural unit (C) derived from a monomer (C) which is a monofunctional (meth) acrylate represented by the following formula (C); CH 2 =C(R A )(COOR B ) (c) in the formula (c), R A represents a hydrogen atom or a methyl group, and R B represents a monovalent group containing 1 or more kinds selected from a hydroxyl group, a carboxyl group and an oxyalkylene chain.
  4. 4. The antifouling coating composition according to claim 1 or 2, wherein the silicon atom-containing resin further has a structural unit (D) having at least 1 metal atom-containing group selected from the group represented by the following formula (V) and the group represented by the following formula (VI); [ chemical formula 7] In the formula (V), M represents a metal atom having a valence of 2, and R 30 represents an organic acid residue or an alcohol residue; [ chemical formula 8] In the formula (VI), M represents a metal atom having a valence of 2.
  5. 5. The antifouling paint composition according to claim 1 or 2, wherein the content of the structural unit (a) is 20% by mass or more of all structural units contained in the silicon atom-containing resin.
  6. 6. An antifouling coating composition according to claim 1 or 2, which is free of an antifouling agent.
  7. 7. The antifouling coating composition according to claim 1 or 2, further comprising an antifouling agent.
  8. 8. An antifouling paint composition according to claim 7, wherein the antifouling agent is selected from at least 1 of cuprous oxide, pyrithione metal salt, 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one, 2-methylsulfanyl-4-tert-butylamino-6-cyclopropylamino-s-triazine, 4-bromo-2- (4-chlorophenyl) -5- (trifluoromethyl) -1H-pyrrole-3-carbonitrile and medetomidine.
  9. 9. An antifouling coating film formed from the antifouling paint composition according to claim 1.
  10. 10. A composite coating film comprising a primer coating film formed from the anticorrosive coating composition and an antifouling coating film formed from the antifouling coating composition according to claim 1 laminated on the primer coating film.
  11. 11. A ship having the antifouling coating film of claim 9 or the composite coating film of claim 10.
  12. 12. An underwater structure comprising the antifouling coating film according to claim 9 or the composite coating film according to claim 10.

Description

Antifouling coating composition and antifouling coating film Technical Field The present invention relates to an antifouling coating composition comprising a silicon atom-containing resin. The present invention also relates to an antifouling coating film formed from the antifouling coating composition, a composite coating film comprising the antifouling coating film, and a ship and an underwater structure comprising the antifouling coating film or the composite coating film. Background In a ship, in a portion where the ship is in contact with seawater, adhesion of organisms such as barnacles, mussels, algae, and the like may cause problems such as impeding efficient operation, leading to fuel waste, and the like. Conventionally, in order to prevent adhesion of organisms, an antifouling paint composition has been applied to the surface of a ship. For example, international publication No. 2011/046086 (patent document 1) discloses an antifouling paint composition comprising a silicon atom-containing resin as a carrier, and a thermoplastic resin and/or a plasticizer. Prior art literature Patent literature Patent document 1 International publication No. 2011/046086 Disclosure of Invention Problems to be solved by the invention An antifouling coating film formed from the antifouling coating composition is required to exhibit excellent antifouling performance for a long period of time when immersed in water (seawater). In addition, an antifouling coating film is required to have excellent cracking resistance, for example, to be less likely to cause cracking even in a dry and wet repeated environment. The purpose of the present invention is to provide an antifouling coating composition capable of forming an antifouling coating film having excellent antifouling performance and excellent cracking resistance. Another object of the present invention is to provide an antifouling coating film formed from the antifouling coating composition, a composite coating film comprising the antifouling coating film, and a ship and an underwater structure comprising the antifouling coating film or the composite coating film. Means for solving the problems The present invention provides the following antifouling paint composition, antifouling coating film, composite coating film, ship and underwater structure. [ 1] An antifouling paint composition comprising a silicon atom-containing resin and a thermoplastic resin other than the silicon atom-containing resin, The silicon atom-containing resin comprises a structural unit (A) which has at least 1 silicon atom-containing group selected from the group represented by the following formula (I), the group represented by the following formula (II), the group represented by the following formula (III) and the group represented by the following formula (IV); The thermoplastic resin comprises a thermoplastic resin having a weight average molecular weight of 1000 or more; The content of the thermoplastic resin having a weight average molecular weight of 1000 or more is 6.0 parts by mass or more and 11.0 parts by mass or less with respect to 100 parts by mass of the silicon atom-containing resin; [ chemical formula 1] In the formula (I), a and b each independently represent any integer from 2 to 5, m represents any integer from 0 to 50, n represents any integer from 3 to 270, R 1～R5 each independently represents alkyl, alkoxy, phenyl, substituted phenyl, phenoxy or substituted phenoxy; [ chemical formula 2] In the formula (II), c and d each independently represent any integer of 2-5, p represents any integer of 0-50, R 6、R7 and R 8 each independently represent alkyl, R a or R b; R a is [ Chemical formula 3] Wherein x represents any integer of 0 to 200, R 23～R27 are the same or different and represent alkyl; r b is [ Chemical formula 4] Wherein y represents any integer of 1 to 200, R 28 and R 29 are the same or different and represent alkyl; [ chemical formula 5] In the formula (III), e, f, g and h each independently represent any integer from 2 to 5, q and s each independently represent any integer from 0 to 50, R represents any integer from 3 to 270, R 9～R12 each independently represents alkyl, alkoxy, phenyl, substituted phenyl, phenoxy or substituted phenoxy; [ chemical formula 6] In the formula (IV), i, j, k and l each independently represent any integer of 2 to 5, t and u each independently represent any integer of 0 to 50, v and w each independently represent any integer of 0 to 70, and R 13～R22 are the same or different and represent alkyl. [ 2 ] The antifouling paint composition according to [ 1], wherein the silicon atom-containing resin further has a structural unit (B) having a triorganosiloxycarbonyl group. [ 3 ] The antifouling paint composition according to [1 ] or [ 2 ], wherein the silicon atom-containing resin further has a structural unit (C) derived from a monomer (C) which is a monofunctional (meth) acrylate represented by the following formula (C); CH2=C(RA)(COORB) (c) in t