US4036798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable compositions of improved thermal stability
Assignee: Dynamit Nobel AG
•
Filing: 1975-02-03
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Granted: 1977-07-19
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Expires: 1995-02-03
Abstract
Abstract A composition comprising a granular inorganic oxidic material other than glass powder and 1 to 30 weight percent, based on the weight of said material, of glass powder, especially a composition additionally containing a hardenable thermo- or cold-setting phenolic resin, which composition does not disintegrate at high temperatures and retains compressive strength.
Inventors
- 👤 Walter Hoppe
- 👤 Hans Junger
- 👤 Franz Weissenfels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:37
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/12; C04B26/122
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
57 words
A composition comprising an inorganic oxidic material other than glass powder and 1 to 30 weight percent of glass powder having a particle size of >0 to 100 microns and 1 to 20 weight percent, of a hardenable thermo- or cold-setting phenolic resin, the weights being on the basis of the weight of the inorganic oxidic material.
Claim 2
Dependent Claim
57 words
A composition comprising an inorganic oxidic material other than glass powder and 1 to 30 weight percent of glass powder having a particle size of >0 to 100 microns and 1 to 20 weight percent, of a hardenable thermo- or cold-setting phenolic resin, the weights being on the basis of the weight of the inorganic oxidic material.
Claim 3
Dependent Claim
29 words
A composition according to claim 1 wherein said composition additionally contains 0.1 to 3.5%, based on the weight of said material, of an inorganic boron compound in powder form.
Claim 4
Dependent Claim
13 words
A composition according to claim 2 wherein said boron compound is sodium tetraborate.
Claim 5
Dependent Claim
27 words
A composition according to claim 1 wherein said composition additionally contains 0.1 to 5 weight percent, based on the weight of said material, of an alkali carbonate.
Claim 6
Dependent Claim
13 words
A composition according to claim 4 wherein said alkali carbonate is sodium carbonate.
Claim 7
Dependent Claim
18 words
A composition according to claim 1 wherein the glass powder has a particle size up to 10 microns.
Claim 8
Dependent Claim
13 words
A composition according to claim 1 wherein said resin is a novolak resin.
Claim 9
Dependent Claim
26 words
A composition according to claim 1 wherein said resin is present in a weight ratio of 3 to 8:97 to 92 to said inorganic oxidic material.
Claim 10
Dependent Claim
14 words
A composition according to claim 1 wherein said composition additionally contains a tar pitch.
Claim 11
Dependent Claim
21 words
A composition according to claim 1 wherein said glass powder is present in an amount of at least 10% by weight.
Claim 12
Dependent Claim
14 words
Forming a molded article by the use of a hardenable composition of claim 1.
Claim 13
Dependent Claim
20 words
A composition according to claim 1 wherein the particle size of the glass powder is between 100 and 200 microns.
Claim 14
Dependent Claim
18 words
A composition according to claim 1 wherein the glass powder has a softening temperature between 600° and 1,000°.
Claim 15
Dependent Claim
13 words
A composition according to claim 13 wherein the inorganic oxidic material is sand.
Claim 16
Dependent Claim
12 words
A composition according to claim 14 wherein said sand is quartz sand.
Claim 17
Dependent Claim
53 words
A composition according to claim 15 wherein the quartz sand has the following grain size distribution: 1 to 15 weight percent in the 0.1 to 0.2 mm. range; 40 to 80 weight percent in the 0.2 to 0.315 mm. range; and 10 to 50 weight percent of particle size greater than 0.315 mm.
Claim 18
Dependent Claim
42 words
A composition according to claim 16 wherein the glass contains 12 to 18 weight percent alkali oxide and about 10 to 30 weight percent of alkaline earth oxides, the balance consisting essentially of SiO 2 and subordinate amounts of other metal oxides.
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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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |