# US 11,440,832 B2 · Glass filler and method for producing the same

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- Number: US 11,440,832 B2
- Document ID: US11440832B2
- Status: Granted
- Kind: B2
- Application number: 16/343,334
- Filed: 2017-11-09
- Published: 2019-10-17
- Granted: 2022-09-13
- Earliest claimed: 2016-11-10
- Assignees: Nippon Sheet Glass Co., Ltd.
- Applicants: Nippon Sheet Glass Company, Limited
- Inventors: Kosuke Fujiwara
- Web page: https://patentgrep.com/patent/US11440832B2

## CPC

- C03C 3/083: containing aluminium oxide or an iron compound
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- A61K 8/19: containing inorganic ingredients
- A61K 8/25: Silicon; Compounds thereof
- A61Q 1/12: Face or body powders for grooming, adorning or absorbing
- C03C 3/091: containing aluminium
- C03C 12/00: Powdered glass (C03C8/02 takes precedence); Bead compositions
- C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
- C03C 17/06: with metals (C03C17/34, C03C17/44 take precedence)
- C03C 17/10: by deposition from the liquid phase
- C03C 17/25: by deposition from the liquid phase
- C03C 17/256: {Coating containing TiO2}
- C08K 3/40: Glass
- C08K 7/14: Glass
- C09D 5/028: {Pigments; Filters}
- C09D 7/40: Additives
- C09D 11/00: Inks
- C09D 11/322: Pigment inks
- C09D 201/00: Coating compositions based on unspecified macromolecular compounds
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- 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)

## Abstract

A glass filler of the present disclosure includes glass having a composition, the composition including iron oxide. For the content in mass % of the iron oxide in the composition, 0.005≤FeO≤0.30 and 0.01≤T-Fe2O3≤0.80 (T-Fe2O3 represents total iron oxide calculated as Fe2O3) are satisfied. For the iron oxide in the composition, Fe2+/(Fe2++Fe3+), which represents the proportion by mass of Fe2+ to total iron, is 0.15 or more and 1.00 or less. The glass filler of the present disclosure is a glass filler having a new composition including a coloring component, the glass filler having a high visible transmittance and a controlled color which can be, for example, within a range of colors different from those of conventional glass fillers that have a low visible transmittance.

## Claims

### Claim 1

A glass filler comprising glass having a composition comprising iron oxide, wherein
for the content of the iron oxide in mass %, the following are satisfied:
0.005≤FeO≤0.30; and
0.01≤T-Fe2O3<0.50, wherein T-Fe2O3 represents total iron oxide calculated as Fe2O3,
for the iron oxide in the composition, Fe2+/(Fe2++Fe3+) is 0.45 or more and 1.00 or less, wherein Fe2+/(Fe2++Fe3+) represents the proportion by mass of Fe2+ to total iron;
the composition further comprises the following components, in mass %:
50≤SiO2≤60,
2≤B2O3≤15,
10≤Al2O3≤20,
15≤CaO≤30, and
0≤(Li2O+Na2O+K2O)≤2; and
the glass filler is a glass flake.

### Claim 2

A glass filler comprising glass having a composition comprising iron oxide, wherein
for the content of the iron oxide in mass %, the following are satisfied:
0.005≤FeO≤0.30; and
0.01≤T-Fe2O3<0.50, wherein T-Fe2O3 represents total iron oxide calculated as Fe2O3, for the iron oxide in the composition, Fe2+/(Fe2++Fe3+) is 0.45 or more and 1.00 or less, wherein Fe2+/(Fe2++Fe3+) represents the proportion by mass of Fe2+ to total iron;
the composition further comprises the following components, in mass %:
57≤SiO2≤65,
0≤B2O3≤2,
8≤Al2O3≤15,
1≤MgO≤5,
15≤CaO≤30, and
0≤(Li2O+Na2O+K2O)≤4; and
the glass filler is a glass flake.

### Claim 3

A glass filler comprising glass having a composition comprising iron oxide, wherein
for the content of the iron oxide in mass %, the following are satisfied:
0.005≤FeO≤0.30; and
0.01≤T-Fe2O3<0.50, wherein T-Fe2O3 represents total iron oxide calculated as Fe2O3,
for the iron oxide in the composition, Fe2+/(Fe2++Fe3+) is 0.45 or more and 1.00 or less, wherein Fe2+/(Fe2++Fe3+) represents the proportion by mass of Fe2+ to total iron;
the composition further comprises the following components, in mass %:
65<SiO2≤70,
5≤Al2O3≤15,
1≤MgO≤10,
10≤CaO≤25, and
0≤(Li2O+Na2O+K2O)≤4; and
the glass filler is a glass flake.

### Claim 4

A glass filler comprising glass having a composition comprising iron oxide, wherein
for the content of the iron oxide in mass %, the following are satisfied:
0.005≤FeO≤0.30; and
0.01≤T-Fe2O3≤0.50, wherein T-Fe2O3 represents total iron oxide calculated as Fe2O3,
for the iron oxide in the composition, Fe2+/(Fe2++Fe3+) is 0.45 or more and 1.00 or less, wherein Fe2+/(Fe2++Fe3+) represents the proportion by mass of Fe2+ to total iron;
the composition further comprises the following components, in mass %:
50≤SiO2≤75,
0≤B2O3≤2,
15≤Al2O3≤30,
5≤MgO≤25, and
0≤(Li2O+Na2O+K2O)≤4; and
the glass filler is a glass flake.

### Claim 5 (depends on 2)

The glass filler according to claim 2, wherein a visible transmittance, as calculated for a thickness of 15 μm of the glass filler, is 87% or more.

### Claim 6 (depends on 2)

The glass filler according to claim 2, wherein a light transmittance T750nm at a wavelength of 750 nm, as calculated for a thickness of 1 mm of the glass filler, is 71 to 91%.

### Claim 7 (depends on 2)

The glass filler according to claim 2, wherein a light transmittance T350nm at a wavelength of 350 nm, as calculated for a thickness of 1 mm of the glass filler, is 5 to 84%.

### Claim 8 (depends on 2)

A coated glass filler comprising the glass filler according to claim 2 and a coating formed on a surface of the glass filler, wherein
the coating contains a metal or a metal oxide as a main component.

### Claim 9 (depends on 2)

A resin composition comprising the glass filler according to claim 2 and a matrix resin.

### Claim 10 (depends on 2)

A paint comprising the glass filler according to claim 2 and at least one selected from the group consisting of (a) a matrix resin and (b) at least one component selected from the group consisting of a thermosetting resin, a thermoplastic resin, and a curing agent.

### Claim 11 (depends on 6)

An ink composition comprising the glass filler according to claim 6 and a vehicle in which is dispersed at least one selected from the group consisting of a pigment and a dye.

### Claim 12 (depends on 2)

A cosmetic comprising the glass filler according to claim 2 and a cosmetic additive.

### Claim 13 (depends on 2)

A method for producing the glass filler according to claim 2,
the method comprising controlling glass raw materials and/or an atmosphere where the glass filler is formed, thereby controlling, for the iron oxide in the composition of glass, the content of FeO, the content of T-Fe2O3, and Fe2+/(Fe2++Fe3+) representing the proportion by mass of Fe2+ to total iron to obtain the glass filler having a desired color.

### Claim 14 (depends on 8)

A resin composition comprising the coated glass filler according to claim 8 and a matrix resin.

### Claim 15 (depends on 8)

A paint comprising the coated glass filler according to claim 8 and at least one selected from the group consisting of (a) a matrix resin and (b) at least one component selected from the group consisting of a thermosetting resin, a thermoplastic resin, and a curing agent.

### Claim 16 (depends on 8)

An ink composition comprising the coated glass filler according to claim 8 and a vehicle in which is dispersed at least one selected from the group consisting of a pigment and a dye.

### Claim 17 (depends on 8)

A cosmetic comprising the coated glass filler according to claim 8 and a cosmetic additive.

### Claim 18 (depends on 8)

A method for producing the coated glass filler according to claim 8,
the method comprising controlling glass raw materials and/or an atmosphere where the glass filler is formed, thereby controlling, for the iron oxide in the composition of glass, the content of FeO, the content of T-Fe2O3, and Fe2+/(Fe2++Fe3+) representing the proportion by mass of Fe2+ to total iron to obtain the glass filler having a desired color.