Patent US4374754A successfully refreshed from Google Patents.
US4374754A
Expired / Lapsed
US
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Self-cleaning coating compositions and cooking apparatus coated therewith
Assignee: Sharp Corp
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Filing: 1981-01-30
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Granted: 1983-02-22
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Expires: 2001-01-30
Abstract
Abstract A self-cleaning coating film is formed using a self-cleaning coating composition including an oxidation, catalyst mixed within a composition including silicone synthetic resin and an organic solvent. The oxidation catalyst includes at least one element selected from a metal such as a noble metal and a metal oxide such as manganese dioxide, copper oxide, iron oxide, nickel oxide, chrome oxide, and the like. The metal is blended with a powder made of alumina, or the like, in the range of about 0.1 to 1.0 weight %. The diameter of the particles of the powder is on the order of about 40 to 300μ. The powder is mixed with the composition in the range of about 5 to 100 weight %. The metal oxide is present in the composition at about 50 weight %. The self-cleaning coating film is formed at about 40 to 300μ thickness. The thus formed self-cleaning coating film is exposed to an elevated temperature of about 300° to 400° Centigrade for about 5 to 10 minutes, whereby the silicone synthetic resin is carbonized to form a film of SiO 2 .
Inventors
- 👤 Nobushige Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:16
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/005; B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/123; B01J31/124; C; C09; C09D; C09D183/00; C09D183/04; C09G; C09G1/00; C09G1/06; C09G1/14; C09G1/16; B01J2231/00; B01J2231/70; B01J23/00; B01J23/16; B01J23/38; B01J23/40; B01J23/70; B01J23/74; B01J37/00; B01J37/08; B01J37/082; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
72 words
A composition for a self-cleaning coating which catalytically oxidizes and removes fats and oils deposited on said coating, comprising: (a) at least one silicone synthetic resin binder selected from the group consisting of straight silicone resins, silicone resins copolymerized with alkyds, silicone resins copolymerized with epoxy, and silicone resins copolymerized with acrylics; (b) an organic solvent; and (c) a thermostable oxidation catalyst mixed within said silicone synthetic resin and said organic solvent.
Claim 2
Dependent Claim
72 words
A composition for a self-cleaning coating which catalytically oxidizes and removes fats and oils deposited on said coating, comprising: (a) at least one silicone synthetic resin binder selected from the group consisting of straight silicone resins, silicone resins copolymerized with alkyds, silicone resins copolymerized with epoxy, and silicone resins copolymerized with acrylics; (b) an organic solvent; and (c) a thermostable oxidation catalyst mixed within said silicone synthetic resin and said organic solvent.
Claim 3
Dependent Claim
28 words
The self-cleaning coating composition according to claim 1, wherein said oxidation catalyst includes at least one oxidation catalyst material selected from a metal material and a metal oxide.
Claim 4
Dependent Claim
16 words
The self-cleaning coating composition according to claim 2, wherein said metal material comprises a noble metal.
Claim 5
Dependent Claim
16 words
The self-cleaning coating composition according to claim 3, wherein said noble metal is Pt or Pd.
Claim 6
Dependent Claim
30 words
The self-cleaning coating composition according to claim 2, wherein said metal oxide is selected from the group consisting of manganese oxide, copper oxide, iron oxide, nickel oxide and chrome oxide.
Claim 7
Dependent Claim
18 words
The self-cleaning coating composition according to claim 5, wherein said metal oxide is manganese dioxide or nickel oxide.
Claim 8
Dependent Claim
15 words
The self-cleaning coating composition according to claim 1, wherein said thermostable oxidation catalyst comprises ferrite.
Claim 9
Dependent Claim
21 words
The self-cleaning coating composition according to claim 2, wherein said metal material is mixed with a powder of an aluminum compound.
Claim 10
Dependent Claim
23 words
The self-cleaning coating composition according to claim 8, wherein said aluminum compound is selected from the group consisting of alumina, cordierite and mullite.
Claim 11
Dependent Claim
34 words
The self-cleaning coating composition according to claim 8, wherein said metal material and said powder are mixed together and are then mixed in the composition in the range of 5 to 20 weight %.
Claim 12
Dependent Claim
27 words
The self-cleaning coating composition according to claim 10, wherein said metal material contained within said powder is in the range of about 0.1 to 1.0 weight %.
Claim 13
Dependent Claim
26 words
The self-cleaning coating composition according to claim 10, wherein the diameter of the particles of said powder is in the order of about 40 to 300μ.
Claim 14
Dependent Claim
45 words
The self-cleaning coating composition according to claims 11 or 12, wherein the powder containing the metal material as the oxidation catalyst is blended within a composition including the silicone synthetic resin and the organic solvent in the range of about 5 to 100 weight %.
Claim 15
Dependent Claim
44 words
The self-cleaning coating composition according to claims 11 or 12, wherein the powder containing the metal material as the oxidation catalyst is blended within a composition including the silicone synthetic resin and the organic solvent in the range of about several tens weight %.
Claim 16
Dependent Claim
34 words
The self-cleaning coating composition according to claim 5, wherein the metal oxide is blended within a composition containing the silicone synthetic resin and the organic solvent in the range of about 50 weight %.
Claim 17
Dependent Claim
18 words
The self-cleaning coating composition according to claim 5, wherein the metal oxide includes two types of metal oxide.
Claim 18
Dependent Claim
18 words
A self-cleaning coating film according to claim 1, wherein said oxidation catalyst is thermostable up to 600° C.
Claim 19
Dependent Claim
42 words
The self-cleaning coating film according to claim 17, wherein the self-cleaning coating film is exposed to an elevated temperature of about 300° to 400° Centigrade so that the silicone synthetic resin film is carbonized to form a film of SiO 2 .
Claim 20
Dependent Claim
24 words
The self-cleaning coating film according to claim 18, wherein the self-cleaning coating film is exposed to said elevated temperature for 5 to 10 minutes.
Claim 21
Dependent Claim
23 words
The self-cleaning coating film according to claim 18, wherein the weight of the film after heating is 50-80% of the weight before heating.
Claim 22
Dependent Claim
20 words
A self-cleaning coating film made from the composition according to claim 1, having a thickness of about 40 to 300μ.
Claim 23
Dependent Claim
38 words
A self-cleaning coating composition, comprising: a silicone synthetic resin selected from the group consisting of straight silicone synthetic resin, silicone intermediate products, modified silicone synthetic resin and mixtures thereof; a heat stable oxidation catalyst and an organic solvent.
Claim 24
Dependent Claim
38 words
A self-cleaning coating composition, comprising: a silicone synthetic resin selected from the group consisting of straight silicone synthetic resin, silicone intermediate products, modified silicone synthetic resin and mixtures thereof; a heat stable oxidation catalyst and an organic solvent.
Claim 25
Dependent Claim
18 words
The self-cleaning coating composition according to claim 22, and further including inorganic carrier particles for said oxidation catalyst.
Claim 26
Dependent Claim
25 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin is present in the range of about 30 to 80 weight %.
Claim 27
Dependent Claim
24 words
The self-cleaning coating composition according to claim 22, wherein said oxidation catalyst is present in the range of about 0.1 to 50 weight %.
Claim 28
Dependent Claim
24 words
The self-cleaning coating composition according to claim 22, wherein said organic solvent is present in the range of about 5 to 30 weight %.
Claim 29
Dependent Claim
40 words
The self-cleaning coating composition according to claim 23, wherein said oxidation catalyst is present in the range of about 0.1 to 12 weight % and said carrier particles are present in the range of about 5 to 50 weight %.
Claim 30
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin contains lower alkyl and aryl groups.
Claim 31
Dependent Claim
18 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin contains methyl and phenyl groups.
Claim 32
Dependent Claim
21 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises recurring units of the following formula: ##STR3##
Claim 33
Dependent Claim
20 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin is a silicone resin copolymerized with epoxy.
Claim 34
Dependent Claim
50 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin is a silicone resin copolymerized with epoxy represented by the following formula: ##STR4## wherein m is an integer between 2 and 80, l is between about 10 and 20 and n is between about 0 and 12.
Claim 35
Dependent Claim
22 words
The self-cleaning coating composition according to claim 22, which comprises silicone intermediate products having a molecular weight between about 1000 and 1500.
Claim 36
Dependent Claim
21 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone intermediate products blended with non-silicone polymers.
Claim 37
Dependent Claim
42 words
The self-cleaning coating composition according to claim 22, wherein the silicone synthetic resin comprises a non-silicone component and wherein said non-silicone component of the silicone synthetic resin does not exceed about 1.8 times the weight of the silicone component of the resin.
Claim 38
Dependent Claim
16 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises methyl silicone.
Claim 39
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with alkyds.
Claim 40
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with polyester.
Claim 41
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with acryl.
Claim 42
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with urethane.
Claim 43
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with epoxy.
Claim 44
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with melamine.
Claim 45
Dependent Claim
19 words
The self-cleaning coating composition according to claim 22, wherein said silicone synthetic resin comprises silicone resin copolymerized with phenol.
Claim 46
Dependent Claim
21 words
The self-cleaning coating composition according to claim 22, wherein said heat stable oxidation catalyst is a metal or a metal oxide.
Claim 47
Dependent Claim
29 words
The self-cleaning coating composition according to claim 22, wherein said heat stable oxidation catalyst is a metal selected from the group consisting of cobalt manganese, iron, copper and nickel.
Claim 48
Dependent Claim
26 words
The self-cleaning coating composition according to claim 22, wherein said heat stable oxidation catalyst is a metal selected from the group consisting of palladium or platinum.
Claim 49
Dependent Claim
29 words
The self-cleaning coating composition according to claim 22, wherein said heat stable oxidation catalyst is a metal having a surface area in excess of 0.1 square meter per gram.
Claim 50
Dependent Claim
26 words
The self-cleaning coating composition according to claim 46, wherein said heat stable oxidation catalyst has a surface area in excess of 0.1 square meter per gram.
Claim 51
Dependent Claim
18 words
The self-cleaning coating composition according to claim 47, wherein said heat stable oxidation catalyst is a noble metal.
Claim 52
Dependent Claim
64 words
A coating composition, comprising: 30 to 80% by weight of a silicone synthetic resin selected from the group consisting of straight silicon synthetic resin, silicone intermediate products, modified silicone synthetic resin and mixtures thereof; 0.1 to 50% by weight of a heat stable oxidation catalyst selected from the group consisting of a metal material, a metal oxide and mixtures thereof; and an organic solvent.
Claim 53
Dependent Claim
64 words
A coating composition, comprising: 30 to 80% by weight of a silicone synthetic resin selected from the group consisting of straight silicon synthetic resin, silicone intermediate products, modified silicone synthetic resin and mixtures thereof; 0.1 to 50% by weight of a heat stable oxidation catalyst selected from the group consisting of a metal material, a metal oxide and mixtures thereof; and an organic solvent.
Claim 54
Dependent Claim
16 words
A coating composition according to claim 50, which comprises inorganic carrier particles for said oxidation catalyst.
Claim 55
Dependent Claim
39 words
A coating composition according to claim 51, wherein said oxidation catalyst is present in the range of about 0.1 to 1 weight % and said carrier particles are present in the range of about 5 to 50 weight %.
Claim 56
Dependent Claim
70 words
A composition for forming a self-cleaning coating which catalytically oxidizes and removes fats and oils deposited on said coating, comprising: a silicon synthetic resin binder; an effective amount of a thermostable oxidation catalyst selected from the group consisting of a metal material and a metal oxide; inorganic carrier particles for said oxidation catalyst; and an organic solvent, said composition having a solids content of about 50 to 80 weight %.
Claim 57
Dependent Claim
70 words
A composition for forming a self-cleaning coating which catalytically oxidizes and removes fats and oils deposited on said coating, comprising: a silicon synthetic resin binder; an effective amount of a thermostable oxidation catalyst selected from the group consisting of a metal material and a metal oxide; inorganic carrier particles for said oxidation catalyst; and an organic solvent, said composition having a solids content of about 50 to 80 weight %.
Claim 58
Dependent Claim
29 words
The composition according to claim 53, wherein said inorganic carrier particles permeate or hold by coating said metal oxidation catalyst in an amount of 0.1 to 1.0 weight %.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |