US3816154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica gel flatting agent
Assignee: Individual
•
Filing: 1973-05-18
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Granted: 1974-06-11
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Expires: 1993-05-18
Abstract
Abstract A very effective flatting agent for varnishes and lacquers is a silica gel which has been melt-coated with a miscible mixture of a wax and an organic fatty acid. The wax and the fatty acid should have a melting point above about 40*C, with the melting point of the wax and the fatty acid being less than the decomposition point of either of these components. The silica gel has an average particle size between about 2 microns and 10 microns, and preferably has a very narrow particle size distribution. When admixed into a lacquer or varnish, these silica gels create a light diffusing surface which gives the visual effect of a dull finish.
Inventors
- 👤 H Baldyga
- 👤 Goury T Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/309; C09C3/00; C09C3/08; C09C3/10; C09D; C09D7/00; C09D7/40; C09D7/42; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
A silica gel flatting agent as in claim 1 wherein said flatting agent contains about 5 percent to about 30 percent by weight of said miscible mixture and about 70 percent to 95 percent by weight of silica gel.
Claim 2
Dependent Claim
37 words
A silica gel flatting agent as in claim 2 wherein said miscible mixture consists of about 5 to 50 percent by weight of said fatty acid and about 50 to 95 percent by weight of said wax.
Claim 3
Dependent Claim
35 words
A silica gel flatting agent as in claim 3 wherein said fatty acid is selected from the group consisting of stearic acid, lauric acid, palmitic acid, myristic acid, Alpha eleosteric acid and Beta eleosteric acid.
Claim 4
Dependent Claim
26 words
A silica gel flatting agent as in claim 4 wherein said wax is selected from the group consisting of paraffin waxes, microcrystalline waxes and polyethylene waxes.
Claim 5
Dependent Claim
28 words
A silica gel flatting agent as in claim 5 wherein the average particle size of said melt coated silica gel is between about 3 microns and 9 microns.
Claim 6
Independent Claim
70 words
A method for producing a silica gel flatting agent comprising melt coating onto a silica gel having an average particle size between about 2 to 10 microns, an organic fatty acid and a wax, said organic fatty acid and said wax each having a melting point above about 40*C, said melting point of said organic fatty acid and of said wax being less than the decomposition point of either component.
Claim 7
Dependent Claim
45 words
A method as in claim 7 wherein said fatty acid and said wax are admixed in a ratio of about 5 to 50 parts by weight fatty acid and about 50 to 95 parts by weight wax prior to melt coating onto said silica gel.
Claim 8
Dependent Claim
49 words
A method as in claim 8 wherein said fatty acid is selected from the group consisting of lauric acid, stearic acid, palmitic acid, myristic acid, Alpha eleostearic acid and Beta eleostearic acid, and said wax is selected from the group consisting of paraffin waxes, microcrystalline waxes, and polyethylene waxes.
Claim 9
Dependent Claim
61 words
A method as in claim 8 wherein said silica gel is coated with said admixture of organic fatty acid and wax in a fluid energy mill operating at a temperature above the melting point of said organic fatty acid and said wax, which thereby concurrently melt coats said silica gel and sizes the coated silica gel to said average particle size.
Claim 10
Dependent Claim
24 words
A method as in claim 10 wherein the fluid medium within said fluid energy mill is air at a temperature of above about 50*C.
Claim 11
Dependent Claim
48 words
A method as in claim 10 wherein said silica gel fed to said fluid energy mill is a silica hydrogel, and said fluid medium within said fluid energy mill is at a temperature of above about 100*C and is selected from the group consisting of air and steam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |