Surface modified pigment

Patent metadata

Field	Value
Publication number	US-11453598-B2
Application number	US-201916584603-A
Country	US
Kind code	B2
Filing date	Sep 26, 2019
Priority date	Aug 31, 2009
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

A composition comprising a pigment particle that is coated with a cationic material and isopropyl titanium tri-isostearate. The pigment particle can be included in a cleansing composition for deposition on a surface, such as skin.

First claim

What is claimed is:

1. A method for preparing a body wash, shower gel, liquid hand soap or bar soap composition comprising a pigment particle pre-coated with Polyquaternium-67 and isopropyl titanium triisostearate, the method comprising the steps of:
(a) preparing a pigment particle coated with Polyquaternium-67 and isopropyl titanium triisostearate, by:
(i) dissolving the Polyquaternium-67 in water in a vessel to form a mixture;
(ii) adding the pigment particle to the mixture in step (i);
(iii) drying the mixture from step (ii);
(iv) cooling the dried mixture;
(v) sieving the mixture from step (iv) to remove agglomerate thereby producing a sieved powder;
(vi) adding to the sieved powder a solution of isopropyl titanium triisostearate dissolved in a solvent;
(vii) mixing or blending the solution from step (vi), and
(viii) drying the mixed or blended solution to produce the coated pigment particle; and

(b) combining the coated pigment particle with one or more components of the body wash, shower gel, liquid hand soap or bar soap selected from anionic surfactants, amphoteric surfactants, nonionic surfactants, suspending agents, oil and petrolatum.

2. The method of claim 1 , wherein the dissolving in step (i) is accomplished with heating.

3. The method of claim 1 , wherein the drying in step (iii) is performed by heating.

4. The method of claim 3 , wherein the heating is at approximately 105° C. for approximately 3 hours.

5. The method of claim 1 , wherein step (iv) further comprises gently chopping the dried mixture.

6. The method of claim 1 , wherein the sieving in step (v) comprises sieving with a No. 40 sieve.

7. The method of claim 1 , wherein step (viii) comprises heating the mixed or blended solution.

8. The method of claim 1 , wherein step (viii) comprises heating the mixed or blended solution at approximately 85° C. for 1 hour.

9. The method of claim 8 , wherein step (viii) further comprises cooling the mixed or blended solution and gently chopping the cooled product.

10. The method of claim 1 , wherein the particle is mica/titanium dioxide.

Assignees

• Colgate Palmolive Co
• Kobo Products Inc

Inventors

• Shao Yun
• Schlossman David
• Kontrimiene Neringa
• Haskel Ariel

Classifications

• C09C3/006

  Combinations of treatments provided for in groups C09C3/04 - C09C3/12 · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• C09C1/021

  Calcium carbonates · CPC title

• C09C1/24

  Oxides of iron · CPC title