Shaped particles

Patent metadata

Field	Value
Publication number	US-9957468-B2
Application number	US-201514934498-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 6, 2015
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

Shaped particles having a longitudinal length (L) and a predetermined complex cross-sectional shape extending on a plane perpendicular to said longitudinal length (L). The cross-sectional shape has at least one vertex. An edge extends along the length L from the vertex. The particles further comprise an anchoring element disposed away from the edge. The ratio of said length (L) to a perimeter-equivalent diameter of said predetermined cross-sectional shape “ECD P Hull ” is between about 0.5 and about 5.

First claim

What is claimed is:

1. Shaped particles comprising non-spherical abrasive particles, wherein said abrasive particles comprise elements having a longitudinal length (L) and a predetermined complex cross-sectional shape extending on a plane perpendicular to said longitudinal length (L), wherein the cross-sectional shape has at least one vertex, wherein an edge extends along the length L from the vertex, wherein the particles further comprise an anchoring element disposed away from the edge, and the ratio of said length (L) to a perimeter-equivalent diameter of said predetermined cross-sectional shape: “ECD P Hull ” is between about 0.5 and about 5.

2. The shaped particles according to claim 1 the complex cross-sectional shape comprising at least one concavity, wherein the diameter of the largest inscribed disk D max-in-disk traveling in the x-y plane into a concavity of the element is between about 10 and about 800 microns.

3. The shaped particles according to claim 1 where said the cross-sectional shape of said elements has a form factor of between about 0.05 and about 0.5 as measured according to ISO 9276-6.

4. The shaped particles according to claim 1 where the cross-sectional shape of said elements has a solidity of between about 0.1 and about 0.7 according to ISO 9276-6.

5. The shaped particles according to claim 1 where length of the elements (L) is between about 50 and about 1000 microns.

6. The shaped particles according to claim 1 where the ECD P Hull is between about 40 μm and about 800 μm.

7. The shaped particles according to claim 1 wherein said cross-sectional shape has a maximum Feret diameter F max of between about 100 μm and about 800 μm and a minimum Feret diameter F min of between about 50 μm and about 350 μm.

8. The shaped particles according to claim 1 wherein each said edge has a tip diameter of between about 1 μm and about 50 μm.

9. The shaped particles according to claim 1 wherein the particles comprise a material selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polycarbonate, melamine, urea, polyurethane, polyacrylate, polystyrene, phenolic polyesters, polyamide, minerals and mixtures thereof.

10. The shaped particles according to claim 1 wherein the particles comprise a biodegradable material having a biodegradability rate of greater than 50% according to ASTM6400 test method, and selected from the group consisting of polyhydroxy-alkanoates, polyhydroxybutyrate, polyhydroxybutyrate-co-valerate, polyhydroxybutyrate-co-hexanoate and mixtures thereof, poly(lactic acid), polycaprolactone, polyesteramide, aliphatic and/or, aromatic copolyesters containing a mix of succinic, adipic, terepthalic diacids, propanediol, butanediol, pentanediol monomer and mixtures thereof; thermoplastic starch; and mixtures thereof.

11. The shaped particles according to claim 1 wherein the particles comprise from 5 to 70%, by weight of particle, of reinforcing filler particles selected from the group consisting of organic materials, in-organic materials and mixtures thereof, wherein the organic material is selected from the group consisting of: nut shell, wood, cotton, flax or bamboo fibers, corn cob, rice hull, sugars, carbohydrates, starch from corn, maize, potato, or urea; other plant parts selected from the group consisting of stems, roots, leaves, seeds; polyesters; biodegradable polyesters selected from the group consisting of polyhydroxy-alkanoates, poly(lactic acid), polycaprolactone, polyesteramide, aliphatic and/or copolyesters, and mixtures thereof; and mixtures thereof; the in-inorganic material being selected from the group consisting of carbonate or sulfate salt, phyllosilicate material and mixtures thereof, talc, kaolinite, vermiculite, mica, muscovite, pyrophillite, bentonite, montmorrillonite, feldspar, and mixtures thereof.

12. The shaped particles according to claim 1 wherein the underlying material of the particles has a Mohs hardness of between about 1 and about 5.

13. The shaped particles according to claim 1 wherein the underlying material of the particles has a shore D hardness between about 40 and about 90.

Assignees

• Procter & Gamble

Inventors

• Gonzales Denis Alfred
• Groombridge Michael Leslie
• Mcdonnell Michael

Classifications

• C09K3/1409 Primary

  Abrasive particles per se (preparation of diamond C01B32/25) · CPC title

• B24D3/00

  Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents · CPC title

• C11D3/14 Primary

  Fillers; Abrasives {; Abrasive compositions; Suspending or absorbing agents not provided for in one single group of C11D3/12; Specific features concerning abrasives, e.g. granulometry or mixtures (dyes, pigments C11D3/40)} · CPC title

• C11D17/06

  Powder; Flakes; Free-flowing mixtures; Sheets · CPC title