Aqueous compositions comprising polymeric duller particle

Abstract

The present invention provides aqueous matte coating compositions comprising a binder component B) and a polymeric duller component A) composed of particles of one or more multi-stage copolymer or single stage crosslinked (co)polymer, e.g. crosslinked t-butyl (meth)acrylate, the duller component particles A) having an average diameter of 1-20 μm. Components A) and B) are compatible. Preferably, the duller component A) is acrylic; more preferably, components A) and B) are acrylic. The aqueous compositions provide matte coatings having haptic or feel (soft touch) properties, film and appearance properties, including burnish resistance and low color loss.

Description

Claims

1. An aqueous composition comprising: polymeric duller component A) composed of particles having an average diameter of 1-20 μm of one or more polymer chosen from a multi-stage copolymer, a single stage crosslinked (co)polymer having a Tg of from −60° C. to 75° C., and mixtures thereof; and,binder component B) composed of one or more film forming organic binder compatible with the duller component A),wherein, when the said duller component A) comprises one or more single stage crosslinked (co)polymer, the said (co)polymer is chosen from crosslinked t-butyl acrylate (t-BA) (co)polymer, crosslinked 2-ethylhexyl (meth)acrylate (co)polymer, crosslinked ethyl (meth)acrylate copolymer, crosslinked sec-butyl (meth)acrylate (co)polymer, crosslinked methyl acrylate (co)polymer, crosslinked hexyl (meth)acrylate (co)polymer, crosslinked isobutyl (meth)acrylate (co)polymer, crosslinked benzyl (meth)acrylate (co)polymer, crosslinked isopropyl (meth)acrylate (co)polymer, crosslinked decyl (meth)acrylate (co)polymer, crosslinked dodecyl (meth)acrylate (co)polymer, crosslinked n-butyl (meth)acrylate (co)polymer, crosslinked C21 to C30 alkyl (meth)acrylate (co)polymer, crosslinked vinyl propionate (co)polymer, urethane polymer, urea-formaldehyde resin, melamine resin, silicone-containing (meth)acrylate copolymer, a copolymer of any of the crosslinked polymers with an (meth)acrylic monomer the copolymer having a Tg of from −10° C. to 75° C., a copolymer of any of the crosslinked polymers with a vinyl monomer the copolymer having a Tg of from −10° C. to 75° C., and mixtures and combinations thereof.

2. A composition as claimed in claim 1, wherein each of the duller component A) and the binder component B) is acrylic.

3. A composition as claimed in claim 1, wherein the said duller component A) comprises one or more multi-stage polymer chosen from acrylic multi-stage polymer, vinyl multi-stage polymer, multi-stage synthetic rubber copolymer, multi-stage urethane copolymer, water-dispersible graft copolymer, mixtures thereof, combinations thereof, and mixtures thereof with a single stage crosslinked (co)polymer.

4. A composition as claimed in claim 1, wherein the said duller component A) comprises particles of one or more (co)polymer having an average diameter of from 1 μm to 15 μm.

5. A composition as claimed in claim 1, wherein the weight ratio, as solids, of the said duller component A) to the said binder component B) ranges from 0.1:1 to 10:1.

6. A composition as claimed in claim 2, wherein the said binder component B) comprises a two-stage acrylic emulsion polymer.

7. A composition as claimed in claim 1, wherein the said binder component B) comprises one or more polymer binders having a weight-average molecular weight of from 10,000 to 10,000,000.

8. A method of making a coating comprising: forming an aqueous composition comprising duller component A) comprising particles of one or more (co)polymer having an average diameter of 1-20 μm, the said (co)polyrner being chosen from a multi-stage copolymer and a single stage crosslinked (co)polymer; and,binder component B) comprising one or more film forming organic binder compatible with the duller component A),applying the coating composition to one or more substrate; and,drying the coating composition,wherein, when the said duller component A) comprises one or more single stage crosslinked (co)polymer, the said (co)polymer is chosen from crosslinked t-butyl acrylate (t-BA) (co)polymer, crosslinked 2-ethylhexyl (meth)acrylate (co)polymer, crosslinked ethyl (meth)acrylate copolymer, crosslinked sec-butyl (meth)acrylate (co)polymer, crosslinked methyl acrylate (co)polymer, crosslinked hexyl (meth)acrylate (co)polymer, crosslinked isobutyl (meth)acrylate (co)polymer, crosslinked benzyl (meth)acrylate (co)polymer, crosslinked isopropyl (meth)acrylate (co)polymer, crosslinked decyl (meth)acrylate (co)polymer, crosslinked dodecyl (meth)acrylate (co)polymer, crosslinked n-butyl (meth)acrylate (co)polymer, crosslinked C21 to C30 alkyl (meth)acrylate (co)polymer, crosslinked vinyl propionate (co)polymer, urethane polymer, urea-formaldehyde resin, melamine resin, silicone-containing (meth)acrylate copolymer, a copolymer of any of the crosslinked polymers with an (meth)acrylic monomer the copolymer having a Tg of from −10° C. to 75° C., a copolymer of any of the crosslinked polymers with a vinyl monomer the copolymer having a Tg of from −10° C. to 75° C., and mixtures and combinations thereof.

9. A coated substrate made by the method as claimed in claim 8.

10. A coated substrate as claimed in claim 9, wherein the said substrate is chosen from leather, wood, natural wood, plywood, engineered wood, particle board, lignocellulosics, gypsum board, paper, cardboard, masonite, paperboard, skin, hair, woven textiles, non-woven textiles, plastics, metals, concrete, brick, stone, pavement and road surfaces.

11. A composition as claimed in claim 1, further comprising an additional duller chosen from inorganic dullers and organic dullers.