# US 11,993,696 B2 · Modified fibrous wollastonite and method of producing the same

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- Number: US 11,993,696 B2
- Document ID: US11993696B2
- Status: Granted
- Kind: B2
- Application number: 15/989,112
- Filed: 2018-05-24
- Published: 2018-11-29
- Granted: 2024-05-28
- Earliest claimed: 2017-05-26
- Assignees: Nichia Corporation
- Applicants: Nichia Corporation
- Inventors: Hideki Yoshida; Hirofumi Ooguri; Yuji Akazawa
- Web page: https://patentgrep.com/patent/US11993696B2

## CPC

- C08K 3/34: Silicon-containing compounds
- C01B 33/24: Alkaline-earth metal silicates
- C08K 7/10: Silicon-containing compounds
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

A method of producing a modified fibrous wollastonite is provided. The method includes hydrothermally treating a fibrous wollastonite.

## Claims

### Claim 1

A method consisting of: heating a composition consisting of a fibrous wollastonite having an average fiber length of from 1 μm to 100 μm and water at a pressure of 0.2 MPa or more and 4 MPa or less.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the heating is carried out at a temperature of above 100° C. to 250° C.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the heating is carried out in a time period of from 1 hour to 100 hours.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the composition consisting of the fibrous wollastonite and water has a fibrous wollastonite content of 40% by mass or less relative to a total mass of the composition.

### Claim 5 (depends on 2)

The method according to claim 2, wherein the heating is carried out in a time period of from 1 hour to 100 hours.

### Claim 6 (depends on 2)

The method according to claim 2, wherein the composition consisting of the fibrous wollastonite and water has a fibrous wollastonite content of 40% by mass or less relative to a total mass of the composition.

### Claim 7 (depends on 3)

The method according to claim 3, wherein the composition consisting of the fibrous wollastonite and water has a fibrous wollastonite content of 40% by mass or less relative to a total mass of the composition.

### Claim 8 (depends on 5)

The method according to claim 5, wherein the composition consisting of the fibrous wollastonite and water has a fibrous wollastonite content of 40% by mass or less relative to a total mass of the composition.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the heating is carried out at a pressure of 0.8 MPa or more and 4 MPa or less.

### Claim 10 (depends on 1)

The method according to claim 1, wherein the method consists of heating a composition consisting of a fibrous wollastonite and water at a pressure of 0.2 MPa or more and 4 MPa or less in a closed container.

### Claim 11 (depends on 1)

The method according to claim 1, wherein the method consists of heating a composition consisting of a fibrous wollastonite and water at a pressure of 0.2 MPa or more and 4 MPa or less in a sealed container.

### Claim 12 (depends on 1)

The method of claim 1, wherein a product obtained by the method has an average fiber length of fibrous wollastonite that is from 1 μm to 100 μm.