US4039337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release coating for glass manufacture
Assignee: Jarden Corp
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Filing: 1976-03-26
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Granted: 1977-08-02
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Expires: 1996-03-26
Abstract
Abstract A composition and method of preparation are herein described for molten release and parting compositions adaptable for use in glass-forming operations. The novel composition comprises an aqueous dispersion of a mixture of a solid lubricant, a water-soluble silicate binder, a setting agent, and a water-soluble phosphate. A preferred composition comprises a mixture of flake graphite, boron nitride, sodium silicate, zinc oxide and potassium phosphate tribasic.
Inventors
- 👤 Richard E. Brown
- 👤 Archie L. Bickling, Jr.
- 👤 Virgil R. Friebel
- 👤 Kent G. Roller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
C; C10; C10M; C10M7/00; B; B22; B22C; B22C3/00; C03; C03B; C03B40/00; C03B40/02; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/065; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/085; C10M2201/087; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/16; C10M2201/18; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/10; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/042; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A release and lubricating composition capable of rendering release and lubricating characteristics in excess of twenty hours during glassware manufacture at temperatures in excess of 1600° F., said composition consisting essentially of an aqueous dispersion of a mixture of boron nitride and graphite as solid lubricants, said solid lubricants being present in an amount between about 5 and 70 weight percent of the aqueous dispersion, the weight ratio of said graphite to boron nitride being between a range of about 1:2 to about 5:1, a water-soluble silicate binder, said binder being present in an amount between about 10 and 40 weight percent, a setting agent for said silicate binder, said setting agent being present in an amount between about 0.05 and about 15 weight percent, and a water-soluble phosphate, said phosphate being present in an amount between about 1 and about 25 weight percent.
Claim 2
Dependent Claim
144 words
A release and lubricating composition capable of rendering release and lubricating characteristics in excess of twenty hours during glassware manufacture at temperatures in excess of 1600° F., said composition consisting essentially of an aqueous dispersion of a mixture of boron nitride and graphite as solid lubricants, said solid lubricants being present in an amount between about 5 and 70 weight percent of the aqueous dispersion, the weight ratio of said graphite to boron nitride being between a range of about 1:2 to about 5:1, a water-soluble silicate binder, said binder being present in an amount between about 10 and 40 weight percent, a setting agent for said silicate binder, said setting agent being present in an amount between about 0.05 and about 15 weight percent, and a water-soluble phosphate, said phosphate being present in an amount between about 1 and about 25 weight percent.
Claim 3
Dependent Claim
40 words
A release and lubricating composition as recited in claim 1 wherein the boron nitride has a particle size of between about 0.5 and about 2 microns and graphite has a particle size of between about 10 and about 200 microns.
Claim 4
Dependent Claim
20 words
A release and lubricating composition as recited in claim 1 wherein the said water-soluble binder is an alkali metal silicate.
Claim 5
Dependent Claim
42 words
A release and lubricating composition as recited in claim 1 wherein the setting agent is a member selected from the group consisting of zinc oxide, calcium chloride, magnesium sulfate, aluminum sulfate, sodium borate, sodium metaborate, sodium fluorosilicate, kaolinitic clays and mixtures thereof.
Claim 6
Dependent Claim
17 words
A release and lubricating composition as recited in claim 1 wherein the water-soluble phosphate is potassium phosphate.
Claim 7
Dependent Claim
166 words
A release and lubricating composition for forming molten glass at temperatures above about 1600° F., said composition capable of rendering release and lubricating characteristics in excess of twenty hours, said composition consisting essentially of an aqueous dispersion of a mixture of about 5 to 70 weight percent of solid lubricants comprising graphite and boron nitride, the particle size of said boron nitride being between about 0.5 and 2 microns and the particle size of said graphite being between about 10 and 200 microns, the weight ratio of said graphite to boron nitride being between a range of about 1:2 to about 5:1, about 10 to 40 weight percent of sodium silicate binder, about 0.5 to 15 weight percent of a setting agent selected from the group consisting of zinc oxide, calcium chloride, magnesium sulfate, aluminum sulfate, sodium borate, sodium metaborate, sodium fluorosilicate, kaolinitic clays and mixtures thereof, 1 to 25 weight percent of potassium phosphate and about 0.01 to 3 weight percent of a wetting agent.
Claim 8
Dependent Claim
166 words
A release and lubricating composition for forming molten glass at temperatures above about 1600° F., said composition capable of rendering release and lubricating characteristics in excess of twenty hours, said composition consisting essentially of an aqueous dispersion of a mixture of about 5 to 70 weight percent of solid lubricants comprising graphite and boron nitride, the particle size of said boron nitride being between about 0.5 and 2 microns and the particle size of said graphite being between about 10 and 200 microns, the weight ratio of said graphite to boron nitride being between a range of about 1:2 to about 5:1, about 10 to 40 weight percent of sodium silicate binder, about 0.5 to 15 weight percent of a setting agent selected from the group consisting of zinc oxide, calcium chloride, magnesium sulfate, aluminum sulfate, sodium borate, sodium metaborate, sodium fluorosilicate, kaolinitic clays and mixtures thereof, 1 to 25 weight percent of potassium phosphate and about 0.01 to 3 weight percent of a wetting agent.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |