# US 5,710,208 A · Binder composition, coating composition containing this binder, production and use thereof

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- Number: US 5,710,208 A
- Document ID: US5710208A
- Status: Granted
- Kind: A
- Application number: 08/542,544
- Filed: 1995-10-13
- Granted: 1998-01-20
- Earliest claimed: 1992-11-07
- Assignees: Herberts GmbH
- Inventors: Klaus Bederke; Carmen Flosbach; Eva Frigge; Walter Schubert
- Web page: https://patentgrep.com/patent/US5710208A

## CPC

- C09D 171/02: Polyalkylene oxides
- C09D 133/064: {containing anhydride, COOH or COOM groups, with M being metal or onium-cation}
- C09D 167/06: Unsaturated polyesters having carbon-to-carbon unsaturation
- C09D 201/08: Carboxyl groups
- C08L 33/068: {containing glycidyl groups}
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A binder composition, a coating composition containing this binder, a process for its production and use to produce single or multi-layer lacquer coatings, particularly in the automotive sector, are described. The binder composition contains A) 25 to 75 wt. % of one of more resins containing carboxyl groups, which may contain .alpha.,.beta.-unsaturated groups, with a number average molecular weight (Mn) of 500 to 10000 g/mol and an acid value of 15 to 200 mg KOH/g, B) 25 to 75 wt. % of one or more polyethers, polyesters, polyether/polyesters and/or (meth)acrylic copolymers with at least one .alpha.,.beta.-unsaturated group and at least one epoxy group per molecule, wherein the .alpha.,.beta.-unsaturated groups and epoxy groups are present in a numerical ratio of 20:80 to 80:20, with a number average molecular weight (Mn) of up to 10000 g/mol, C) 0 to 60 wt. % of one or more polyols with at least two hydroxyl functional groups per molecule, D.sub.1) 0 to 20 wt. % of one or more melamine resins, D.sub.2) 0 to 40 wt. % of one or more capped polyisocyanates, wherein the sum of the weight percentages of components A), B), C), D.sub.1) and D.sub.2) is 100 wt. %, together with E) 0 to 10 wt. % of one or more catalysts to catalyze the reaction of the carboxyl and epoxy groups, related to the sum of the weights of components A) to D.sub.2), and F) 0.1 to 10 wt. % of one or more thermally or photochemically activated initiators, related to the total weight of components A) and B).

## Claims

### Claim 1

A binder composition suitable for coating compositions, which binder comprises
A) 25 to 75 wt % of one or more resins containing carboxyl groups, with a number average molecular weight (Mn) of 500 to 10000 g/mol and an acid value of 15 to 200 mg KOH/g,
B) 25 to 75 wt. % of one or more polyethers, polyesters, polyether-polyesters and/or (meth)acrylic copolymers, each containing groups of the formulas: ##STR2## and having at least one .alpha.,.beta.-unsaturated group and at least one epoxy group per molecule;
wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen or an unbranched or branched alkyl with 1 to 10 carbon atoms; wherein the .alpha.,.beta.-unsaturated groups and epoxy groups are present in a numerical ratio of 20:80 to 80:20, with a number average molecular weight (Mn) of up to 10000 g/mol, said molecular weight applies to all of the polyethers, polyesters, polyether-polyesters, and (meth) acrylic copolymers,
C) 0 to 60 wt. % of one or more polyols with at least two hydroxyl functional groups per molecule,
D.sub.1) 0 to 20 wt. % of one or more melamine resins,
D.sub.2) 0 to 40 wt. % of one or more capped polyisocyanates, wherein the sum of the weight percentages of components A), B), C), D.sub.1) and D.sub.2 is 100 wt. %, together with
E) 0 to 10 wt. % of one or more catalysts to catalyze the reaction of the carboxyl and epoxy groups, related to the sum of the weights of components A) to D.sub.2, and
F) 0.1 to 10 wt. % of one or more thermally or photochemically activated initiators, related to the total weight of component A) and B).

### Claim 2 (depends on 1)

A binder composition according to claim 1, in which the component A) resins are one or more optionally .alpha.,.beta.-unsaturated (meth)acrylic copolymers containing carboxyl groups and/or one or more optionally .alpha.,.beta.-unsaturated polyesters containing carboxyl groups.

### Claim 3 (depends on 1)

A binder composition according to claim 1, in which the resin components A) and B) are at least partially precondensed.

### Claim 4 (depends on 1)

A binder according to claim 1, wherein component B was at least in part produced in the presence of component C.

### Claim 5 (depends on 4)

A binder composition according to claim 4, wherein component C is a hydroxy-functional polyester.

### Claim 6 (depends on 1)

A coating composition containing the binder composition according to claim 1.

### Claim 7 (depends on 6)

A coating composition according to claim 6 in the form of a lacquer containing solvent.

### Claim 8 (depends on 7)

A coating composition according to claim 7 with a solvent content of 5 to 60 wt. % based on the entire composition.

### Claim 9 (depends on 6)

A coating composition according to claim 6 which contains water and optionally one or more organic solvents.

### Claim 10 (depends on 6)

A coating composition according to claim 6 in the form of a powder coating.

### Claim 11 (depends on 6)

A coating composition according to claim 6 in the form of a clear lacquer with no pigments nor extenders optionally containing additives customary in lacquers.

### Claim 12 (depends on 6)

A coating composition according to claim 6 in the form of a topcoat or base lacquer containing pigments, extenders and/or additives customary in lacquers.

### Claim 13 (depends on 1, 2, 3, 4, 5, 6)

A process for the production of a coating composition according to claim 6, wherein a binder composition according to one of claims 1 to 5 is dissolved or dispersed in one or more organic solvents and/or water, optionally after partial neutralization of the carboxyl groups present and, before or after dissolving or dispersing, is mixed with additives and/or pigments and/or extenders customary in lacquers.