Granted Patent B2

US 12,552,958 · App. 17/430,746 · Granted Feb 17, 2026

Inventors: Dorota Greszta-Franz (Solingen, DE); Jan Weikard (Leverkusen, DE); Matthias Wintermantel (Hürth, DE); Robert Reyer (Langenfeld, DE); Thomas Schuettler (Cologne, DE)

Assignee: Covestro Deutschland AG

C09D175/04C08G18/12C08G18/3234C08G18/3821C08G18/722C08G18/73C08G18/755C08K3/22C09D5/08C08G2150/00C08K2003/2241C08K2003/2251C08K2003/2265

Abstract

Claims (30)

1 . A two-component coating composition comprising

a) at least one polyaspartic ester-containing component A;

b) at least one polyisocyanate component B;

c) optionally one or more components C that are different from A and are reactive towards isocyanate groups;

d) at least one inorganic and/or organic pigment (component D1); and

optionally other auxiliaries and additives (component D2),

wherein component A comprises

one or more polyaspartic esters of the general formula (I)

in which

X is an m-valent organic radical, optionally containing one or more heteroatoms, as can be obtained by removing the primary amino groups from a corresponding polyamine that has (cyclo) aliphatically or araliphatically attached amino groups and is in a molecular weight range from 60 to 6000 g/mol, and which may contain further functional groups that are reactive towards isocyanate groups and/or inert at temperatures of up to 100° C.,

R1 and R2 are identical or different organic radicals each having 1 to 18 carbon atoms,

m is an integer>1,

and one or more polyaspartic esters having a primary amino group that are of the general formula (II)

in which

n is m−1,

X and radicals R1 and R2 have the meanings defined above,

wherein the proportion of compound(s) of the formula (II) in component A is 4 to 20% of a total area measured as area % in the gas chromatogram (GC), wherein the total area corresponds to a sum of the areas in the GC of compounds of the two general formulas (I) and (II) and is equal to 100%.

2 . The two-component coating composition according to claim 1 , wherein dialkyl fumarates are present in component A in an amount from 0.01% to 1.2% by weight based on the total weight of component A.

3 . The two-component coating composition according to claim 1 , wherein the proportion of compound(s) of the formula (II) is 4%-15% of the total area in the GC.

4 . The two-component coating composition according to claim 1 , wherein dialkyl fumarates are present in component A in an amount from 0.01% to 1.0% by weight based on the total weight of component A.

5 . The two-component coating composition according to claim 1 , wherein dialkyl fumarates are present in component A in an amount from 0.01% to 0.1% by weight based on the total weight of component A.

6 . A process for producing a coating on a substrate comprising:

i) applying a two-component coating composition according claim 1 to at least part of a substrate to be coated; and

ii) curing the coating composition from step i).

7 . A substrate coated with a coating obtained in accordance with the process according to claim 6 .

8 . A substrate coated with a coating according to claim 7 , wherein the coating is a topcoat.

9 . The process for producing a coating on a substrate according to claim 6 , wherein the coating is a topcoat.

10 . A method of providing corrosion protection to a substrate, comprising applying the two component coating composition according to claim 1 to at least a portion of the substrate.

11 . The method of claim 10 , wherein the substrate comprises a substrate of ACE (agriculture, construction and earth-moving) equipment.

12 . A method of producing a gloss-stable coating, comprising applying the two component coating composition according to claim 1 to at least a portion of a substrate.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (40)