Imperial Chemical Industries Limited

Jonathan A Graystone

Charles W Bromley

Trevor Stephen Sayer

Thomas N Bowen

Jennifer Ruth Coutts

Andrew J Hobbs

For paints and the like, an aqueous tinter which does not block dispensing nozzles and which has a viscosity of from 0.05 to 1.5 Ns/m.sup.2 (20.degree. C.) and which contains pigment particles, water, micellising dispersant and a non-micellising auxiliary material. The weight ratio of dispersant to pigment must exceed the ratio which would be present at the Daniel Flow Point for a notional tinter consisting only of the pigment, water and the dispersant. The amount of auxiliary material must be sufficient to enable the tinter to be expelled through a bore 2 mm in diameter and 15 mm long by a pressure of not more than 320 MN/m.sup.2 after storage in the bore at 25.degree. C. for 18 hours under a relative humidity of 50%. Preferred dispersants comprise long chain hydrophilic and long chain hydrophobic moieties which may be poly(alkylene glycol) esters of long chain fatty acids or hydrophobic backbone copolymers with pendant poly(alkylene glycol) moieties as hydrophilic side chains.

Aqueous non-blocking tinter for paints

A multitone or multicolor decorative, textured coating on a substrate comprises rigid, spheroidal polymeric beads distributed in a random pattern and embedded in a coherent coating film comprising a film-forming polymer. The beads may be colored and are of a defined size relative to the coherent coating film thickness and there is a contrast in tone or color between the coherent coating film and at least some of the beads. The coating is obtained on a substrate by applying to the substrate with a roller applicator a coating composition which contains beads of defined size.

Decorative coatings providing a multicolor, textured surface

A coating composition which is especially suitable for producing decorative coatings upon wood substrates comprises, as at least 51% by weight of the film-forming material present, a sterically stabilized dispersion in a volatile organic liquid of insoluble vinyl or acrylic polymer particles, the polymer having an extensibility of 50-2000% and being crosslinked to such an extent that it has a gel content of at least 35% by weight.

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Maidenhead, United Kingdom

Jonathan A Graystone