Agglomerate composition

Patent metadata

Field	Value
Publication number	US-10074455-B2
Application number	US-201314439196-A
Country	US
Kind code	B2
Filing date	Oct 30, 2013
Priority date	Oct 31, 2012
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A talc agglomerate composition may include agglomerated talc particles and an agglomerization agent, and may have a conductivity of from about 1 to about 50 μS/cm. A method for making a talc agglomerate composition may include agglomerating talc particles by combining a talc feed material including talc particles and an agglomerization agent to form a talc agglomerate composition. The talc agglomerate composition may have a d10 greater than a d10 of the talc feed material including talc particles. A talc composition may include talc particles having a conductivity greater than 8.1 μS/cm and a viscosity in oil of less than 140 KU.

First claim

What is claimed is:

1. A talc agglomerate composition, said composition comprising agglomerated talc particles and an agglomerization agent, and having a conductivity of from about 1 to about 50 μS/cm;
wherein the talc agglomerate composition has a sd/d 50 of from about 0.5 to about 0.7.

2. The talc agglomerate composition according to claim 1 , wherein said agglomerization agent comprises a binder that is non-electrolytic.

3. The talc agglomerate composition according to claim 2 , wherein the non-electrolytic binder is a polymer, and wherein said polymer comprises a monomer which has a side group comprising a carbonyl, carboxyl, amino or amide functional group.

4. The talc agglomerate composition according to claim 3 , wherein said binder is selected from the group comprising polyacrylic acid, polyvinylpyrrolidone and polyacrylamide.

5. The talc agglomerate composition according to claim 2 , wherein said non-electrolytic binder is a silicate binder.

6. The talc agglomerate composition according to claim 1 , wherein the talc agglomerate composition has a d 90 of from about 15 to about 50 μm.

7. The talc agglomerate composition according to claim 1 , wherein the agglomerization agent is present in an amount ranging from about 1 to about 40% by weight, based on the weight of talc.

8. The talc agglomerate composition according to claim 1 , wherein the talc agglomerated composition has a Hegman value of 0.5 or more.

9. The talc agglomerate composition according to claim 1 , wherein the talc agglomerate composition has a viscosity in oil of from about 50 KU to about 150 KU.

10. The talc agglomerate composition according to claim 1 , wherein the talc agglomerate composition has a d 95 of from about 20 to about 60 μm.

11. A talc agglomerate composition, said composition comprising agglomerated talc particles and an agglomerization agent, and having a d 10 of from about 0.75 to about 20 μm.

Assignees

• Imerys Pigments Inc
• Imerys Usa Inc

Inventors

• Wang Bo

Classifications

• C09C1/028

  Compounds containing only magnesium as metal · CPC title

• C08K9/08

  Ingredients agglomerated by treatment with a binding agent · CPC title

• C01P2004/51

  Particles with a specific particle size distribution · CPC title

• H01B1/24 Primary

  the conductive material comprising carbon-silicon compounds, carbon or silicon · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title