US 9,221,995 B2Granted

Titanium dioxide

AssigneeTioxide Europe Limited

InventorsJohn Robb, John L Edwards, John Temperley, Robert Bird, Paul C Bradley, Anthony G Jones

Life of this patent

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Abstract

A colored composition comprising: a) NIR scattering TiO2 particulate material with an average crystal size of greater than 0.40 μm and a particle size distribution such that 30% or more of the particles are less than 1 μm; b) one or more non-white colorant; wherein the particulate material and the non-white colorant are dispersed within a vehicle. This material with a large crystal size has unusually high reflection of NIR radiation and, simultaneously, noticeably diminished reflectance of visible light. Also disclosed is a coated particulate TiO2 material, wherein the material has an average crystal size of greater than 0.40 μm, and the coating comprises one or more oxide material; this provides low levels of photocatalytic activity that were previously unattainable. This coated TiO2 material may be provided in a composition.

Claims14

Dependent claims

A coloured composition comprising:

(i) NIR scattering particulate material, the material selected from the group consisting of titanium dioxide, doped titanium dioxide and combinations thereof, the material having an average crystal size of from 0.40 μm to 2.0 μm and a particle size distribution such that 30% or more of the particles are less than 1 μm, and wherein the NIR scattering material is coated with two or more oxide materials, wherein one of the oxide materials is a dense silica material and wherein one of the oxide materials is an oxide of one or more elements which are:
(a) group 4 (IVB) and 12 (IIB) transition metals selected from the group consisting of Ti, Zr and Zn and/or
(b) group 13 to 15 (IIIA-VA) p-block elements selected from the group consisting of AI, P and Sn and/or
(c) lanthanides;
(ii) one or more non-white colorant;
wherein the particulate material and the non-white colorant are dispersed within a vehicle.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/808,553Filed 24 Jul 2015 · division
Priority: GB 0808239.87 May 2008
Published: US 2015/0329737 A119 Nov 2015
Granted: 29 Dec 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

C09D 161/28
Of aldehydes with heterocyclic compounds: with melamine
C08K 3/08
Elements: metals
C08K 3/22
Oxides; Hydroxides: of metals
C09D 127/06
Containing chlorine atoms: homopolymers or copolymers of vinyl chloride

Family

PCT/GB2009/001096Parent of this division · filed 1 May 2009
US 2015/0329737 A1Pre-grant publication · published 19 Nov 2015
Application12/935,600Parent of this division
US 9,127,172 B2Parent of this division
US 2011/0041726 A1Published application
US 9,221,995 B2This patent

From the US filing history. Foreign family members aren’t listed.