Paint composition

Patent metadata

Field	Value
Publication number	US-12378423-B2
Application number	US-201917598043-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Mar 26, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A paint composition contains (A) a binder component, (B) a first rheology control agent, and (C) a second rheology control agent, wherein the first rheology control agent (B) is a non-aqueous dispersion resin (b); the second rheology control agent (C) contains a reaction product of (c1) a polyisocyanate compound, (c2) a primary monoamine having a number average molecular weight of 300 or less, and (c3) a polyether amine having two or more amino groups and having a number average molecular weight of 1000 or more and less than 6000; and the proportion of the polyether amine having two or more amino groups and having a number average molecular weight of 1000 or more and less than 6000 (c3) is within the range of 10 to 30 mass % based on the total amount of the components (c1) to (c3).

First claim

The invention claimed is:

1. A paint composition comprising
(A) a binder component,
(B) a first rheology control agent, and
(C) a second rheology control agent,

wherein
the first rheology control agent (B) is a non-aqueous dispersion resin (b),
the second rheology control agent (C) contains a reaction product of
(c1) a polyisocyanate compound,
(c2) a primary monoamine having a number average molecular weight of 300 or less, and
(c3) a polyether amine having two or more amino groups and having a number average molecular weight of 1000 or more and less than 6000, and the proportion of the polyether amine having two or more amino groups and having a number average molecular weight of 1000 or more and less than 6000 (c3) is more than 18 mass % and 28 mass % or less based on the total amount of the components (c1) to (c3), and

wherein the paint composition provides a sag resistance of 53 μm to 57 μm, the sag resistance being evaluated by measuring a film thickness on a test panel where 3 mm sagging of the paint composition was observed from the lower end of a punch hole.

2. The paint composition according to claim 1 , wherein the polyether amine having two or more amino groups and having a number average molecular weight of 1000 or more and less than 6000 (c3) has three or more amino groups.

3. The paint composition according to claim 1 , wherein the binder component (A) contains a hydroxy-containing resin (Al) and a crosslinking agent.

4. The paint composition according to claim 1 , wherein the paint composition provides a finished appearance of 5.1 to 4.5, the finished appearance being evaluated based on a long wave (LW) value measured by using Wave Scan on a test panel.

Assignees

• Kansai Paint Co Ltd

Inventors

• Nakamizu Masato

Classifications

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C09D133/066

  containing -OH groups · CPC title

• C09D7/63

  organic · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title