Visually enhanced particulate
AssigneeImerys Minerals Limited
InventorsSam JOLLIFF, Bo WANG
Life of this patent
Estimating the term…
Abstract
Perlite microspheres having a modified visual appearance, methods of making the perlite microspheres, a composition, such as a personal care, cosmetic or cleaning composition, comprising the perlite microspheres, a visually enhanced exfoliating agent comprising the perlite microspheres, and to the use of the perlite microspheres in personal care, cosmetic or cleaning compositions.
Claims22
A perlite microsphere having a modified visual appearance and at least one of the following:
- (a) a −Δb* value or −Δb value compared to the unmodified perlite microsphere;
- or
- (b) a +Δb* value or +Δb value compared to the unmodified perlite microsphere;
- or
- (c) a −Δa* value or −Δa value compared to the unmodified perlite microsphere;
- or
- (d) a +Δa* value or +Δa value compared to the unmodified perlite microsphere;
- (e) a b* value or b value which is further from 0 than the unmodified perlite microsphere;
- or
- (f) an a* value or a value which is further from 0 than the unmodified perlite microsphere;
- or
- (g) a colour density which is greater than the colour density of the unmodified perlite microsphere.
(canceled)
A method of making a perlite microsphere, comprising treating a perlite microsphere such that its visual appearance is modified compared to the unmodified perlite microsphere prior to treatment, wherein treating comprises:
- (i) burnishing the perlite microsphere in the presence of a colourant, optionally wherein the perlite microsphere is coated with an undercoat prior to burnishing;
- or
- (ii) mixing the perlite microsphere and colourant or colourant precursor in solution;
- or
- (iii) vibrating a mixture of the perlite microsphere and colourant;
- or
- (iv) spraying colourant or colourant precursor onto the surface of the perlite microsphere;
- or
- (v) precipitating colourant onto the surface of the perlite microsphere;
- or
- (vi) coating colourant on the perlite microsphere via a sol-gel process;
- or
- (vii) forming an undercoat on the surface of the perlite microsphere followed by any one of (i)-(vi).
A composition comprising perlite microspheres, wherein the perlite microspheres comprise from about 0.1 wt. % to about 5.0 wt. % of a colourant agent.
22-32. (canceled)
Dependencies are inferred from the claim text.