# US 10,370,559 B2 · Two-component coating compositions and high erosion resistance coatings produced therefrom

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- Number: US 10,370,559 B2
- Document ID: US10370559B2
- Status: Granted
- Kind: B2
- Application number: 15/118,328
- Filed: 2014-12-22
- Published: 2017-06-22
- Granted: 2019-08-06
- Earliest claimed: 2014-02-13
- Assignees: BASF Coatings GmbH
- Applicants: BASF Coatings GmbH
- Inventors: Dieter Hohnholz; Oliver Boelke; Julia Krupp
- Web page: https://patentgrep.com/patent/US10370559B2

## CPC

- C09D 167/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09D167/06 takes precedence)
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/12: using two or more compounds having active hydrogen in the first polymerisation step
- C08G 18/3821: {Carboxylic acids; Esters thereof with monohydroxyl compounds}
- C08G 18/4063: {Mixtures of compounds of group C08G18/62 with other macromolecular compounds}
- C08G 18/42: Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G 18/4277: {Caprolactone and/or substituted caprolactone}
- C08G 18/44: Polycarbonates
- C08G 18/6229: {Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols}
- C08G 18/6651: {with compounds of group C08G18/3225 or polyamines of C08G18/38}
- C08G 18/721: {Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80}
- C08G 18/73: acyclic
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- C08G 18/792: {formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates}
- C09D 175/06: from polyesters
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

The present invention relates to a two-component coating composition comprising (1) a paint base component comprising (A) at least one polycarbonate diol, (B) at least one polyaspartic ester, and (C) at least one filler modified with at least one organosilane, and (2) a hardener component comprising (D) at least one hexamethylene diisocyanate isocyanurate containing aliphatic polyester groups and having an isocyanate content of 5% to 23%. The present invention also relates to a method for producing a coating using the coating composition, and to the coatings produced accordingly.

## Claims

### Claim 1

A two-component coating composition, comprising:
(1) a paint base component comprising
(A) at least one polycarbonate diol,
(B) at least one polyaspartic ester, and
(C) at least one filler modified with at least one organosilane; and
(2) a hardener component comprising
(D) at least one hexamethylene diisocyanate isocyanurate containing aliphatic polyester groups and having an isocyanate content of 5% to 23%.

### Claim 2 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one polycarbonate diol (A) has an OH number of 50 to 500 mg KOH/g.

### Claim 3 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one polycarbonate diol (A) is an aliphatic and linear polycarbonate diol.

### Claim 4 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one polyaspartic ester (B) has an amine number of 120 to 300 mg KOH/g.

### Claim 5 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one polyaspartic ester (B) is aliphatic.

### Claim 6 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one filler (C) is a silicate modified with the at least one organosilane.

### Claim 7 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein said at least one filler (C) modified with at least one organosilane is preparable by modification of an inorganic filler with organosilanes of the formula (V)
X4-n-mSi—Rn(-A-B)m (V)
where
X =OH, halogen, or alkoxy;
R =alkyl;
A =divalent organic radical;
B =amino, hydroxyl, epoxy, epoxypropyloxy, hydroxyalkyl, acetoxy, isocyanate, acryloyloxy, methacryloyloxy, imidazole, ureido, or a vinyl group; and
n, m =0, 1, 2, or 3, with n+m≤3.

### Claim 8 (depends on 1)

The two-component coating composition as claimed in claim 1, wherein the at least one hexamethylene diisocyanate isocyanurate containing aliphatic polyester groups is present, based on the total amount of polyisocyanates present in the coating composition, in a fraction of at least 50 wt %.

### Claim 9 (depends on 1)

A method for producing a coating on a substrate, the method comprising application of a coating composition of claim 1 to a substrate.

### Claim 10 (depends on 9)

The method as claimed in claim 9, wherein the coating produced by application is cured at a temperature of not more than 80° C.

### Claim 11 (depends on 9)

The method as claimed in claim 9, wherein the substrate is a metal substrate or a plastic substrate.

### Claim 12 (depends on 9)

A coating producible by a method of claim 9.

### Claim 13 (depends on 12)

A multicoat coating, comprising as topcoat a coating as claimed in claim 12.

### Claim 14 (depends on 12)

A substrate coated with a coating as claimed in claim 12.

### Claim 15 (depends on 1)

A process for improving the erosion resistance of a substrate, the process comprising coating the substrate with the two-component coating composition of claim 1 to obtain a coated substrate having improved erosion resistance compared to the substrate.