Two-component solvent-based coating composition, method for coating a substrate, coated substrate, and use of such coating composition for improving erosion resistance

Patent metadata

Field	Value
Publication number	US-2024228826-A1
Application number	US-202418414042-A
Country	US
Kind code	A1
Filing date	Jan 16, 2024
Priority date	Jul 2, 2018
Publication date	Jul 11, 2024
Grant date	—

Abstract

The present disclosure relates to a two-component, solvent-based coating composition comprising i) a base component comprising one or more polyesterdiols with a hydroxyl value in the range of from 150 to 500 mg KOH/g and one or more organosilane-modified inorganic fillers, and ii) a polyisocyanate curing component. Said composition can be formulated such that it has a viscosity suitable for spray application (low viscosity under high shear rate) and yield coatings with very good erosion resistance. The present disclosure further relates to a method for coating a substrate using said two-component coating composition, to a coated substrate obtainable by such method, and to use of such coating composition for improving erosion resistance of a substrate.

First claim

1 .- 10 . (canceled)

11 . A method for coating a substrate comprising:
applying a two-component solvent-based coating composition to the substrate; and allowing the applied coating composition to cure, wherein the two-component, solvent-based coating composition comprises i) a base component comprising (A) one or more polyester diols having a hydroxyl value in the range of from 150 to 500 mg KOH/g polyester diol; (B) optionally one or more hydroxyl-functional acrylate resins having a hydroxyl value in the range of from 75 to 500 mg KOH/g resin; and (C) one or more organosilane-modified inorganic fillers; and ii) a curing component comprising (D) one or more polyisocyanates, in such amounts that the coating composition comprises:
5 to 50 wt % of the one or more polyester diols (A);
0 to 25 wt % of the one or more hydroxyl-functional acrylate resins (B);
10 to 70 wt % of the one or more organosilane-modified inorganic fillers (C);
5 to 40 wt % of the one or more polyisocyanates (D);
wherein the coating composition comprises one or more organic solvents in an amount in the range of from 5 to 35 wt %, and has a viscosity in the range of from 50 to 2,000 mPa·s.

12 . A method according to claim 11 wherein the two-component coating composition is applied to the substrate by spray application.

13 . A method according to claim 11 , wherein the substrate is a substrate comprising one or more coating layers and the two-component coating composition is applied as a topcoat layer.

14 . (canceled)

15 . The method of claim 11 , further comprising improving erosion resistance of the substrate.

16 . The method of claim 11 , further comprising allowing the applied coating composition to cure at a temperature of at most 80° C.

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Meyerjürgens Andreas
• Seeger Dirk
• Shishkov Igor
• Wickbold Miriam

Classifications

• C08G18/4238

  derived from dicarboxylic acids and dialcohols · CPC title

• C09D7/62

  modified by treatment with other compounds · CPC title

• C09D7/20

  Diluents or solvents · CPC title

• C08G18/78

  Nitrogen {(C08G18/775, C08G18/776 take precedence)} · CPC title

• C08G18/7893

  having three nitrogen atoms in the ring · CPC title