# US 2014/0194585 A1 · Bulk polymerization of (meth)acrylate copolymers soluble under aqueous-alkaline conditions

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0194585 A1
- Document ID: US20140194585A1
- Status: Published application
- Kind: A1
- Application number: 14/204,459
- Filed: 2014-03-11
- Published: 2014-07-10
- Earliest claimed: 2009-11-20
- Assignees: Evonik Roehm GmbH
- Inventors: Dirk POPPE; Wolfgang Janas; Frank Kleinsteinberg; Anja Christofzik
- Web page: https://patentgrep.com/patent/US20140194585A1

## CPC

- C08F 2/02: Polymerisation in bulk
- C08F 22/10: Esters
- C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
- C08F 220/20: of polyhydric alcohols or phenols {, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate}
- C08F 220/26: Esters containing oxygen in addition to the carboxy oxygen
- C09D 133/066: {containing -OH groups}
- C08F 220/1802: {C2-(meth)acrylate, e.g. ethyl (meth)acrylate}
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- 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)

## Abstract

The invention relates to the synthesis of (meth)acrylate-based mass polymers which are soluble in aqueous alkaline. The invention in particular relates to the synthesis of polymers by means of a mass polymerization. Said mass polymers have a significantly improved solubility in aqueous alkaline media over corresponding polymers produced by means of a heterogeneous aqueous polymerization method, such as emulsion or suspension polymerization. Improved solubility in said context refers to the dissolution rate being faster among particles of equal size, to no significant turbidity remaining after dissolution and to the viscosity of the obtained solutions being lower at the identical ratio of solids content. Furthermore, the compatibility of the compounds according to the invention with water-based varnishes is at least comparable or even improved.

## Claims

### Claim 1

Binder for producing pigment preparations, characterized in that the binder is soluble in aqueous-alkaline solutions,
in that the binder has been prepared exclusively from the following monomers:
40% to 70% by weight of one or more methacrylates characterized in that the alkyl radical is composed of 1 to 8 carbon atoms and/or styrene and/or α-methylstyrene,
20% to 40% by weight of one or more acrylates characterized in that the alkyl radical is composed of 1 to 8 carbon atoms,
1% to 15% by weight of one or more (meth)acrylates characterized in that the alkyl radical contains a hydroxyl function, and
1% to 17% by weight of acrylic acid and/or methacrylic acid,
and in that the binder has been prepared via a continuous bulk polymerization.