US4382998A
Expired / Lapsed
US
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Heat-resistant molding composition and molded parts for handling hot glass articles
Assignee: Dura Temp Corp
•
Filing: 1981-06-08
•
Granted: 1983-05-10
•
Expires: 2001-06-08
Abstract
Abstract This invention relates to rigid solid-lubricant composite materials which are extremely heat and wear-resistant and are moldable and thermosetting when molded to shape for handling hot glass articles. The composition is comprised of an organic silicone resin having chopped glass fibers and a finely-ground graphite-containing material therein. The composition may be molded to shape by compression or transfer molding into conveyor parts, for example, for handling newly-formed hot glass articles without marring their surfaces.
Inventors
- 👤 Edward J. Stengle, Jr.
- 👤 Lester C. Minneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C03; C03B; C03B40/00; C03B40/005; C03B9/00; C03B9/30; C03B9/44; C03B9/447; C08K3/34; C08K7/00; C08K7/02; C08K7/04; C08K7/14; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/25; Y10T428/30; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
A moldable thermosetting composite material for handling newly-formed hot glass articles, and the like, comprising the following constituents in weight percentage: ______________________________________
Range
Thermosetting Weight %
______________________________________
Silicone Resin 24.0-40.0
Graphite 15.0-25.0
Chopped Glass Fibers
1.0-55.0
Carbon Powder 0.0-10.0
Amine Catalyst 0.0-1.0
Iron Oxide Pigment 0.0-2.0
Calcium Stearate Lubricant
0.0-1.0
______________________________________ said material in molded form having properties of high temperature-resistance, medium impact strength and low coefficient of friction.
Claim 2
Dependent Claim
69 words
A moldable thermosetting composite material for handling newly-formed hot glass articles, and the like, comprising the following constituents in weight percentage: ______________________________________
Range
Thermosetting Weight %
______________________________________
Silicone Resin 24.0-40.0
Graphite 15.0-25.0
Chopped Glass Fibers
1.0-55.0
Carbon Powder 0.0-10.0
Amine Catalyst 0.0-1.0
Iron Oxide Pigment 0.0-2.0
Calcium Stearate Lubricant
0.0-1.0
______________________________________ said material in molded form having properties of high temperature-resistance, medium impact strength and low coefficient of friction.
Claim 3
Dependent Claim
74 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents in weight percentage: ______________________________________
Range
Thermosetting Weight %
______________________________________
Silicone Resin 24.0-40.0
Graphite 15.0-25.0
Chopped Glass Fibers
1.0-55.0
Carbon Powder 0.0-10.0
Amine Catalyst 0.0-1.0
Iron Oxide Pigment 0.0-2.0
Calcium Stearate Lubricant
0.0-1.0
______________________________________ said article having at least one generally-planar surface and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
Claim 4
Dependent Claim
74 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents in weight percentage: ______________________________________
Range
Thermosetting Weight %
______________________________________
Silicone Resin 24.0-40.0
Graphite 15.0-25.0
Chopped Glass Fibers
1.0-55.0
Carbon Powder 0.0-10.0
Amine Catalyst 0.0-1.0
Iron Oxide Pigment 0.0-2.0
Calcium Stearate Lubricant
0.0-1.0
______________________________________ said article having at least one generally-planar surface and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
Claim 5
Dependent Claim
19 words
A heat-resistant molded article in accordance with claim 2 wherein said planar surface comprises the hot glass handling surface.
Claim 6
Dependent Claim
18 words
A heat-resistant molded article in accordance with claim 2, wherein said graphite powder comprises about 20 weight percent.
Claim 7
Dependent Claim
28 words
A heat-resistant molded article in accordance with claim 2, wherein said silicone resin is comprised of methyl and phenyl silanes in a ratio of about 1 to 1.
Claim 8
Dependent Claim
37 words
A heat-resistant molded article in accordance with claim 2, wherein said article is comprised of a rigid interior metallic component and a rigid exterior thermosetting composite material compound, said components being firmly joined into a unitary structure.
Claim 9
Dependent Claim
28 words
A heat-resistant molded article in accordance with claim 2, the hot-glass-contacting planar surface of said article being capable of withstanding long-term operating temperatures up to about 800° F.
Claim 10
Dependent Claim
31 words
A heat-resistant molded article in accordance with claim 2, wherein said article has a pair of opposing exterior parallel planar surfaces adapted to reversible long-term use in contacting hot glass articles.
Claim 11
Dependent Claim
75 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents by weight: ______________________________________
AMOUNT
WEIGHT %
______________________________________
Thermosetting
Silicone Resin 25
Graphite 20
Chopped Glass Fibers
49
Carbon Powder 5
Amine Catalyst 0.5
Calcium Stearate
Lubricant 0.5
______________________________________ said article being molded by compression molding and having at least one generally-planar surface, and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
Claim 12
Dependent Claim
75 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents by weight: ______________________________________
AMOUNT
WEIGHT %
______________________________________
Thermosetting
Silicone Resin 25
Graphite 20
Chopped Glass Fibers
49
Carbon Powder 5
Amine Catalyst 0.5
Calcium Stearate
Lubricant 0.5
______________________________________ said article being molded by compression molding and having at least one generally-planar surface, and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
Claim 13
Dependent Claim
78 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents by weight: ______________________________________
AMOUNT
WEIGHT %
______________________________________
Thermosetting
Silicone Resin 35
Graphite 20
Chopped Glass Fibers
37.5
Silica Powder 5
Carbon Powder 1
Amine Catalyst 0.5
Calcium Stearate
Lubricant 0.5
______________________________________ said article being molded by transfer molding and having at least one generally-planar surface, and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
Claim 14
Dependent Claim
78 words
A heat-resistant thermoset-hardened heat-cured molded article for handling newly-formed hot glass products, and the like, comprising the following constituents by weight: ______________________________________
AMOUNT
WEIGHT %
______________________________________
Thermosetting
Silicone Resin 35
Graphite 20
Chopped Glass Fibers
37.5
Silica Powder 5
Carbon Powder 1
Amine Catalyst 0.5
Calcium Stearate
Lubricant 0.5
______________________________________ said article being molded by transfer molding and having at least one generally-planar surface, and having properties of high-temperature resistance, medium impact strength and low coefficient of friction.
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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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |