# US 8,785,557 B2 · Use of aqueous hybrid binders for gloss paints

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- Number: US 8,785,557 B2
- Document ID: US8785557B2
- Status: Granted
- Kind: B2
- Application number: 12/966,528
- Filed: 2010-12-13
- Published: 2011-06-16
- Granted: 2014-07-22
- Earliest claimed: 2009-12-16
- Assignees: BASF SE
- Applicants: Sebastian Roller; Roelof Balk; Rolf Dersch
- Inventors: Sebastian Roller; Roelof Balk; Rolf Dersch
- Web page: https://patentgrep.com/patent/US8785557B2

## CPC

- C08K 5/103: with polyalcohols
- C09D 133/08: Homopolymers or copolymers of acrylic acid esters
- C09D 133/12: Homopolymers or copolymers of methyl methacrylate
- C08G 63/48: by unsaturated higher fatty oils or their acids; by resin acids
- C08L 75/04: Polyurethanes
- C08L 2201/50: Aqueous dispersion, e.g. containing polymers with a glass transition temperature (Tg) above 20°C
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- 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
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention relates to the use of aqueous hybrid binders for producing coating compositions, more particularly in high-gloss coating materials (high-gloss paints), and also to a process for their preparation with low residual monomer content.

## Claims

### Claim 1

A process for preparing an aqueous acrylate-alkyd polymer dispersion (PD) by free-radical emulsion polymerization of
(a) at least one α,β-ethylenically unsaturated monomer (M),
(b) and at least one further monomer (M1) selected from the group consisting of esters of α,β-ethylenically unsaturated monocarboxylic and dicarboxylic acids with C1-C20 alkanols, vinylaromatics, esters of vinyl alcohol with C1-C30monocarboxylic acids, ethylenically unsaturated nitriles, vinyl halides, vinylidene halides, and mixtures thereof, to give a polymer (P),
(c) optionally, subsequent chemical deodorization and
(d) addition of at least one water-soluble alkyd resin having a weight-average molecular weight of between 5000 and 40,000 Da, or of at least one aqueous alkyd emulsion or polyurethane-alkyd emulsion,
which comprises adding the alkyd resin or the alkyd emulsion or polyurethane-alkyd emulsion, the temperature at addition being 60 to 99° C., either subsequent to the polymerization of M and M1, with an afterstir time of 0-2 h or subsequent to the chemical deodorization when carried out, with an afterstir time of 0-2 h.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the addition of the alkyd resin or of the alkyd emulsion or polyurethane-alkyd emulsion takes place subsequent to the polymerization of M and M1, with an afterstir time of 0-2 h.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the chemical deodorization is carried out, and the addition of the alkyd resin or of the alkyd emulsion or polyurethane-alkyd emulsion takes place subsequent to the chemical deodorization, with an afterstir time of 0-2 h.

### Claim 4 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the temperature on addition of the alkyd resin or of the alkyd emulsion or polyurethane-alkyd emulsion is 70 to 95° C.

### Claim 5 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the temperature on addition of the alkyd resin or of the alkyd emulsion or polyurethane-alkyd emulsion is 80 to 90° C.

### Claim 6 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein alkyd used is an aqueous alkyd emulsion or polyurethane-alkyd emulsion.

### Claim 7 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the monomers M1are selected from combinations from the following group:
n-butyl acrylate, methyl methacrylate;
n-butyl acrylate, methyl methacrylate, styrene;
n-butyl acrylate, styrene, butyl (meth)acrylate;
n-butyl acrylate, ethylhexyl acrylate, styrene;
n-butyl acrylate, styrene; or
n-butyl acrylate, n-butyl (meth)acrylate, methyl methacrylate.

### Claim 8 (depends on 7)

The process according to claim 7, wherein monomer M2 is polymerized in combination with the monomers M1 and said monomer M2 is acrylic acid, methacrylic acid, acrylamide, methacrylamide, acetoacetoxyethyl methacrylate, 2-ureido (meth)acrylate or a methoxypolyethylene glycol monomethacrylate or mixtures thereof.

### Claim 9 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the aqueous alkyd resin has an acid number of 20-80 mg KOH/g and a weight-average molecular weight of >5000 and <40,000 Da and an oil content of 25-55%.

### Claim 10 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the aqueous alkyd resin emulsion has an acid number of 20-60 mg KOH/g and an oil content of 25-55%.

### Claim 11 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the aqueous acrylate-alkyd polymer dispersion (PD) comprises up to 20% by weight of at least one emulsifier, based on the total weight of the monomers used for the emulsion polymerization.

### Claim 12 (depends on 1, 2, 3)

The process according to any of claims 1 to 3, wherein the glass transition temperature, Tg, of the acrylate portion of the acrylate-alkyd polymer dispersion (PD) is less than 50° C. but greater than 20° C.