# US 11,999,873 B2 · Dispersion comprising colloidal silica particles and zinc cyanurate particles

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- Number: US 11,999,873 B2
- Document ID: US11999873B2
- Status: Granted
- Kind: B2
- Application number: 17/040,912
- Filed: 2019-03-19
- Published: 2021-01-14
- Granted: 2024-06-04
- Earliest claimed: 2018-03-23
- Assignees: Nissan Chemical Corporation
- Applicants: Nissan Chemical Corporation
- Inventors: Daisuke Shimizu; Satoru Murakami; Yoshiyuki Kashima; Isao Oota
- Web page: https://patentgrep.com/patent/US11999873B2

## CPC

- C09D 5/084: {Inorganic compounds}
- C09D 7/62: modified by treatment with other compounds
- B23C 3/00: Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, {heat assisted machining B23P25/00})
- C01B 33/14: Colloidal silica, e.g. dispersions, gels, sols
- C08K 3/36: Silica
- C08K 5/34924: {containing cyanurate groups; Tautomers thereof}
- C09D 5/02: Emulsion paints {including aerosols}
- C09D 5/022: {Emulsions, e.g. oil in water}
- C09D 5/08: Anti-corrosive paints
- C09D 7/61: inorganic
- C09D 123/0853: {Vinylacetate}
- C09D 125/14: with unsaturated esters
- C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C08K 3/28: Nitrogen-containing compounds
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A dispersion wherein dispersoid particles including colloidal silica and zinc cyanurate are dispersed in a liquid medium. The colloidal silica particles may have an average diameter of 5 to 500 nm, and the dispersion may contain 0.1 to 40% by mass of the particles in terms of SiO2 concentration. Primary particles of the zinc cyanurate may have a major axis length of 50 to 1000 nm, a minor axis length of 10 to 300 nm, and a ratio of major to minor axis length of 2 to 25, and the dispersion may contain 0.1 to 50% by mass of the particles in terms of solids content. A mass ratio of the colloidal silica to the zinc cyanurate particles may be 1:0.01 to 100, and total solids content may be 0.1 to 50% by mass. The liquid medium may be water or an organic solvent.

## Claims

### Claim 1

A dispersion in which dispersoid particles comprising colloidal silica particles and zinc cyanurate particles are dispersed in a liquid medium,
wherein the colloidal silica particles have an average particle diameter of 5 to 500 nm, and the dispersion contains 0.1 to 40% by mass of the colloidal silica particles in terms of SiO2 concentration,
wherein primary particles of the zinc cyanurate particles have a major axis length of 50 to 1000 nm and a minor axis length of 10 to 300 nm as observed with a transmission electron microscope, and have a ratio of the major axis length to the minor axis length of 2 to 25, and the dispersion contains 0.1 to 50% by mass of the zinc cyanurate particles in terms of solids content, and
wherein the dispersoid particles comprising the colloidal silica particles and the zinc cyanurate particles have an average particle diameter of 80 to 2000 nm based on a laser diffraction method, and the dispersion contains 0.2 to 50.1% by mass of the colloidal silica particles and the zinc cyanurate particles in terms of total solids content of both particles.

### Claim 2 (depends on 1)

The dispersion according to claim 1, wherein a ratio of the colloidal silica particles to the zinc cyanurate particles in the dispersoid particles is 1:0.01 to 100 in terms of colloidal silica:zinc cyanurate mass ratio.

### Claim 3 (depends on 1)

The dispersion according to claim 1, wherein the liquid medium is water or an organic solvent.

### Claim 4 (depends on 1)

A method for producing the dispersion according to claim 1, comprising a step of mixing a silica sol and the zinc cyanurate particles or a slurry thereof, using a liquid dispersion machine.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the liquid dispersion machine is a sand grinder, a bead mill, an attritor, or a pearl mill.

### Claim 6 (depends on 1)

The dispersion according to claim 1, wherein the colloidal silica particles have an average particle diameter of 5 to 50 nm.

### Claim 7 (depends on 1)

The dispersion according to claim 1, wherein the dispersion contains 0.1 to 10% by mass of the colloidal silica particles in terms of SiO2 concentration.

### Claim 8 (depends on 1)

The dispersion according to claim 1, wherein the dispersion contains 0.1 to 5% by mass of the zinc cyanurate particles in terms of solids content.

### Claim 9 (depends on 1)

The dispersion according to claim 1, wherein the dispersoid particles comprising the colloidal silica particles and the zinc cyanurate particles have an average particle diameter of 80 to 1000 nm.

### Claim 10 (depends on 1)

The dispersion according to claim 1, wherein the dispersion contains 0.2 to 30% by mass of the colloidal silica particles and the zinc cyanurate particles in terms of total solids content of both particles.

### Claim 11 (depends on 1)

The dispersion according to claim 1, wherein the dispersion contains 0.2 to 20% by mass of the colloidal silica particles and the zinc cyanurate particles in terms of total solids content of both particles.