# US 10,316,194 B2 · Talc composition and uses thereof

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- Number: US 10,316,194 B2
- Document ID: US10316194B2
- Status: Granted
- Kind: B2
- Application number: 14/769,141
- Filed: 2014-02-17
- Published: 2015-12-31
- Granted: 2019-06-11
- Earliest claimed: 2013-02-22
- Assignees: ImerTech SAS
- Applicants: Imertech SAS
- Inventors: Frederic Jouffret; Jerome Crepin-Leblond; Jean-Sebastien Mas
- Web page: https://patentgrep.com/patent/US10316194B2

## CPC

- C09C 1/28: Compounds of silicon {(C09C1/0009, C09C1/0015, C09C1/0078 take precedence)}
- C08K 3/26: Carbonates; Bicarbonates
- C08K 3/30: Sulfur-, selenium- or tellurium-containing compounds
- C08K 3/34: Silicon-containing compounds
- C08K 3/346: {Clay}
- C08K 3/36: Silica
- C08K 3/40: Glass
- C08K 9/08: Ingredients agglomerated by treatment with a binding agent
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/54: Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2006/12: Surface area
- C08K 9/06: with silicon-containing compounds
- C08K 2003/2217: {of magnesium}
- C08K 2003/3045: {Sulfates}
- C08K 2201/016: Additives defined by their aspect ratio
- C09C 3/08: Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)}
- C09C 3/10: Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)}
- C09C 3/12: Treatment with organosilicon compounds {(C09C3/006 takes precedence)}
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

A surface treated high aspect ratio talc may be surface treated with a surface treatment agent including a polymeric species including one or more ether linkages. Functional compositions including a surface treated high aspect ratio talc may be polymer compositions. A process for preparing a surface treated high aspect ratio talc may include mixing the high aspect ratio talc and surface treatment agent. A process for preparing a polymer composition may include combining a high aspect ratio talc with a polymer in an amount of at least about 30% by weight, based on the total weight of the polymer composition.

## Claims

### Claim 1

A molded article comprising:
a polymer composition comprising surface treated high aspect ratio talc (HART) for reinforcing the polymer composition and reducing surface defects in the molded article, wherein the polymer composition comprises 35% to 45% by weight of the surface treated HART, based on the total weight of the polymer composition;
wherein the surface treated HART comprises from about 0.1% to about 10% by weight surface treatment agent and from about 0.1% to about 10% by weight dolomite and/or magnesite, based on the weight of talc; and
wherein the surface treatment agent consists of polymeric species comprising polyether and/or polyether modified polysiloxane.

### Claim 2 (depends on 1)

The molded article according to claim 1, wherein the polymer is selected from polypropylene, polyethylene, a propylene-ethylene copolymer, or combinations thereof.

### Claim 3 (depends on 1)

The molded article according to claim 1, wherein the polymer composition further comprises filler other than the surface treated HART and selected from an alkaline earth metal carbonate or sulphate, a hydrous kandite clay, an anhydrous kandite clay, mica, perlite, feldspars, nepheline syenite, wollastonite, diatomaceous earth, barite, glass, natural or synthetic silica or silicates, and talc having a lamellarity index of less than 2.8, and combinations thereof.

### Claim 4

A process for reducing surface defects in a molded article comprising:
providing a polymer composition comprising a polymer; and
combining 35% to 45% by weight of a surface treated high aspect ratio talc (HART) with the polymer, based on the total weight of the polymer composition, to reinforce the polymer composition and reduce surface defects in the molded article;
wherein the surface treated HART comprises from about 0.1% to about 10% by weight surface treatment agent and from about 0.1% to about 10% by weight dolomite and/or magnesite, based on the weight of the talc; and
wherein the surface treatment agent consists of polymeric species comprising polyether and/or polyether modified polysiloxane.

### Claim 5

A method for increasing the amount of talc in a functional composition to reduce surface defects in a molded article formed using the functional composition, the method comprising:
providing a functional composition; and
incorporating 35% to 45% by weight of a surface treated high aspect ratio talc (HART) into the functional composition, based on the total weight of the functional composition,
wherein the surface treated HART comprises from about 0.1% to about 10% by weight surface treatment agent and from about 0.1% to about 10% by weight dolomite and/or magnesite, based on the weight of talc; and
wherein the surface treatment agent consists of polymeric species comprising polyether and/or polyether modified polysiloxane.

### Claim 6 (depends on 1)

The molded article of claim 1, wherein the molded article is formed via extrusion or molding.

### Claim 7 (depends on 1)

The molded article of claim 1, wherein the polymer composition has:
(i) a first unnotched Charpy impact strength (at −20° C., and/or at −10° C., and/or at 0° C.) which is greater than a second unnotched Charpy impact strength (at −20° C., and/or at −10° C., and/or at 0° C.) of a polymer composition comprising the same amount of high aspect ratio talc that has not been treated with a surface treatment agent; and/or
(ii) a first long term thermal stability (LTTS) which is greater than a second LTTS of a polymer composition comprising the same amount of high aspect ratio talc that has not been treated with a surface treatment agent.

### Claim 8 (depends on 1)

The molded article according to claim 1, wherein the polymeric species comprises one or more ether linkages.

### Claim 9 (depends on 1)

The molded article according to claim 1, wherein the HART has a lamellarity index of at least about 3.0.

### Claim 10 (depends on 1)

The molded article according to claim 1, wherein the HART has a d50 of from about 1 to about 4 μm.

### Claim 11 (depends on 8)

The molded article according to claim 8, wherein the polymeric species comprising one or more ether linkages is a polyether or derivative thereof.

### Claim 12 (depends on 1)

The molded article according to claim 1, wherein the surface treated HART comprises from about 0.1 to about 8% by weight surface treatment agent, based on the weight of talc.

### Claim 13 (depends on 1)

The molded article according to claim 1, wherein the surface treated HART comprises from about 0.1 to about 3% by weight surface treatment agent, based on the weight of talc.

### Claim 14 (depends on 1)

The molded article according to claim 1, wherein the surface treated HART comprises from about 0.1 to about 2% by weight surface treatment agent, based on the weight of talc.

### Claim 15 (depends on 1)

The molded article according to claim 1, wherein the polymer composition comprises 37% to 45% by weight of the surface treated HART, based on the total weight of the polymer composition.

### Claim 16 (depends on 4)

The process according to claim 4, comprising combining 37% to 45% by weight of the surface treated HART, based on the total weight of the polymer composition.

### Claim 17 (depends on 5)

The method according to claim 5, comprising incorporating 37% to 45% by weight of the surface treated HART, based on the total weight of the polymer composition.

### Claim 18 (depends on 1)

The molded article according to claim 1, wherein the surface treatment agent comprises the polyether; and
wherein the polyether is polyalkylene glycol or polyalkylene oxide.

### Claim 19 (depends on 1)

The molded article according to claim 1, wherein the surface treatment agent comprises the polyether modified siloxane; and
wherein the polyether modified siloxane is PEG-modified polysiloxane.

### Claim 20 (depends on 1)

The molded article according to claim 1, wherein the surface treated HART is a synthetic talc.