Microabrasive compositions containing oöids

• US 10,407,601 B2
• Filed: 02/26/2018
• Issued: 09/10/2019
• Est. Priority Date: 02/24/2017
• Status: Active Grant

• Current Assignee: California Institute of Technology
• Original Assignee: California Institute of Technology
• Inventors: Trower, Elizabeth J., Lingappa, Usha F., Grotzinger, John P., Fischer, Woodward
• Primary Examiner(s): Basquill, Sean M
• Application Number:
  US15/905,697
• Publication Number:
  US 20180244967A1
• Time in Patent Office: 561 Days
• CPC Class Codes: A61K 2800/28 Rubbing or scrubbing compositions; Peeling or abrasive compositions; Containing exfoliants
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 8/0241 Containing particulates characterized by their shape and/or structure see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes
• CPC Class Codes: A61K 8/025 Explicitly spheroidal or spherical shape
• CPC Class Codes: A61K 8/19 containing inorganic ingredients
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: C09K 3/1409 Abrasive particles per se preparation of diamond C01B32/25

Abstract

Ooids, microabrasive compositions containing ooids and methods of making microabrasive compositions containing ooids are described. Generally, ooids represent small particles, which are selectable for size, size distribution, and other characteristics and can be used as a microabrasive particle. Ooids generally show a high level of symmetry, sphericity, roundness and a low aspect ratio. As described here, these characteristics generally yield a predictable and highly effective abrasive.

Claims

1. A personal hygiene product formulation comprising:

a fluid matrix containing a plurality of ooids and at least one of the group consisting of a detergent, a lotion, a pH buffer, a nutrient, a mineral, and a stabilizer;

wherein the ooids;

possess an average size of at least about 100 μ

m to less than about 650 μ

m;

possess a size distribution, where at least 75% of the ooids range from about 75 μ

m to about 800 μ

m;

possess an average roundness score of at least 0.4; and

possess an average aspect ratio of less than 1.6.

2. The personal hygiene product formulation of claim 1, wherein the detergent based matrix is a body wash.

3. The personal hygiene product formulation of claim 1, wherein the detergent based matrix is a face wash.

4. The personal hygiene product formulation of claim 1, wherein the ooids have an average size of about 115 μ

m and at least 75% of the ooids range from 90 μ

m to 140 μ

m.

5. The personal hygiene product formulation of claim 1, wherein the ooids have an average size of about 200 μ

m and at least 75% of the ooids range from 150 μ

m to 250 μ

m.

6. The personal hygiene product formulation of claim 1, wherein the ooids have an average size of about 325 μ

m and at least 75% of the ooids range from 240 μ

m to 450 μ

m.

7. The personal hygiene product formulation of claim 1, wherein the ooids have an average size of about 635 μ

m and at least 75% of the ooids range from 480 μ

m to 800 μ

m.

8. The personal hygiene product formulation of claim 1, wherein the ooids have an aspect ratio of less than 1.5 and an average roundness of at least 0.5.

9. The personal hygiene product formulation of claim 1, wherein the ooids have an aspect ratio of less than 1.4 and an average roundness of at least 0.7.

10. The personal hygiene product formulation of claim 1, wherein the ooids have an aspect ratio of less than 1.3 and an average roundness of at least 0.75.