Aqueous coating composition

Patent metadata

Field	Value
Publication number	US-2017369732-A1
Application number	US-201515546381-A
Country	US
Kind code	A1
Filing date	Dec 10, 2015
Priority date	Jan 28, 2015
Publication date	Dec 28, 2017
Grant date	—

Abstract

The problem to be solved by the present invention is to provide an aqueous coating composition having an excellent finished appearance, such as smoothness and distinctness of image, as well as metallic feel and no metallic mottling when the composition comprises an effect pigment; excellent coating film performance, such as water resistance; and excellent storage stability. The present invention provides an aqueous coating composition comprising (A) acrylic resin particles, (B) a water-soluble acrylic resin, and (C) a phosphoric acid compound represented by a specific formula and having hydrocarbon (and optionally polyoxyalkylene); and also provides a method for forming a coating film, comprising applying the aqueous coating composition, as well as an article coated with the aqueous coating composition.

First claim

1 . An aqueous coating composition for vehicles, comprising:
(A) acrylic resin particles, (B) a water-soluble acrylic resin, and (C) a phosphoric acid compound represented by the following Formula (1):

wherein m is 1 or 2, n is 0 or an integer of 1 to 20,
R 1 is substituted or unsubstituted hydrocarbon having 2 or more and 20 or less carbon atoms,
when m is 2, each R 1 may be the same or different,
R 2 is C 2-4 alkylene,
when n is 2 or more, n number of oxyalkylene units (R 2 O) may be the same or different, and
when m is 2, each (R 2 O) n may be the same or different.

2 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) is a phosphoric acid compound represented by Formula (1) above, wherein n is an integer of 1 to 20.

3 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) is a phosphoric acid compound represented by Formula (1) above, wherein the oxyalkylene unit (R 2 O) is oxyethylene.

4 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) is a phosphoric acid compound represented by Formula (1) above, wherein R 1 is substituted or unsubstituted hydrocarbon having 4 or more and 20 or less carbon atoms.

5 . The aqueous coating composition for vehicles according to claim 4 , wherein the phosphoric acid compound (C) is a phosphoric acid compound represented by Formula (1) above, wherein R 1 is substituted or unsubstituted hydrocarbon having 7 or more and 20 or less carbon atoms.

6 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) is a phosphoric acid compound represented by Formula (1) above, wherein n is an integer of 1 to 20, and having an HLB value of 3 to 17.

7 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) has a number average molecular weight of 100 to 3000.

8 . The aqueous coating composition for vehicles according to claim 1 , wherein the phosphoric acid compound (C) is a mixture of a phosphoric acid compound represented by Formula (1) above wherein n is 0, and a phosphoric acid compound represented by Formula (1) above wherein n is an integer of 1 to 20.

9 . The aqueous coating composition for vehicles according to claim 1 , further comprising a crosslinking agent (D).

10 . The aqueous coating composition for vehicles according to claim 1 , wherein the acrylic resin particles (A) are acrylic crosslinked resin particles.

11 . A method for forming a coating film, the method comprising applying the aqueous coating composition for vehicles according to claim 1 to a substrate.

12 . A method for forming a multilayer coating film, comprising:
applying an aqueous base coating composition (X) to a substrate to form a base coating film; applying a clear coating composition (Y) to the uncured base coating film to form a clear coating film; and simultaneously curing the uncured base coating film and the uncured clear coating film; wherein the aqueous base coating composition (X) is the aqueous coating composition for vehicles according to claim 1 .

13 . An article coated with the aqueous coating composition for vehicles according to claim 1 .

Assignees

• Kansai Paint Co Ltd

Inventors

• Takayama Daisuke
• Tonomura Hironori
• Matsushima Naoto
• Nakahara Shuichi

Classifications

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• C09D7/61

  inorganic · CPC title

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C09D5/02

  Emulsion paints {including aerosols} · CPC title

• C09D133/04

  Homopolymers or copolymers of esters {(C09D143/04 takes precedence)} · CPC title