US3952137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the fabrication of a bitumenous roofing material
Assignee: Sandoz AG
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Filing: 1973-04-02
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Granted: 1976-04-20
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Expires: 1993-04-02
Abstract
Abstract A method for the fabrication of a mixture composed of a highly-viscous liquid phase and a thermoplastic and/or elastomeric material which is delivered to the liquid phase in the form of a comminuted solid phase and thereafter plasticized. Importantly, the plasticizing heat is primarily generated by friction internally of the mass. The apparatus for the performance of the method comprises a work container and a stirrer and/or comminution element arranged therein and driven at a high peripheral speed.
Inventors
- 👤 Hans J. Turler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/002; B29B13/00; B29B13/02; C; C08; C08L; C08L95/00; E; E04; E04D; E04D7/00; B29K; B29K2095/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
In a process of fabricating a covering for roofs from (a) a bituminous material such as bitumen or a tar, (b) a solid polymeric material such as a flexible thermoplastic or elastomeric material and (c) a carrier for said materials, the improvement comprising the steps: 1. providing said bituminous material in a highly viscous phase, 2. providing said polymeric material in a comminuted solid phase, 3. providing a high-speed mixer apparatus having a rapidly-rotating stirrer member, 4. mixing said polymeric material into said bituminous material in said apparatus with a high shearing mixing action supplied by said rapidly-rotating stirrer member operated at a speed sufficient to supply most of the heat necessary to plasticize and dissolve (2) and continuing said mixing until a liquid mixture is obtained; and 5. applying the liquid mixture to said carrier.
Claim 2
Dependent Claim
136 words
In a process of fabricating a covering for roofs from (a) a bituminous material such as bitumen or a tar, (b) a solid polymeric material such as a flexible thermoplastic or elastomeric material and (c) a carrier for said materials, the improvement comprising the steps: 1. providing said bituminous material in a highly viscous phase, 2. providing said polymeric material in a comminuted solid phase, 3. providing a high-speed mixer apparatus having a rapidly-rotating stirrer member, 4. mixing said polymeric material into said bituminous material in said apparatus with a high shearing mixing action supplied by said rapidly-rotating stirrer member operated at a speed sufficient to supply most of the heat necessary to plasticize and dissolve (2) and continuing said mixing until a liquid mixture is obtained; and 5. applying the liquid mixture to said carrier.
Claim 3
Dependent Claim
26 words
The process of claim 1 in which said stirrer member is operated at a peripheral speed in the order of 20 to 40 meters per second.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the polymeric material is an elastomer.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein the carrier is impregnated.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the carrier is coated.
Claim 7
Dependent Claim
21 words
The process of claim 3 in which the temperature at which the mixing takes place is between about 180° and 220°C.
Claim 8
Dependent Claim
136 words
An improved covering for a roof comprising a carrier having applied thereto a liquid mixture obtained from (a) a bituminous material such as a bitumen or a tar and (b) a solid polymeric material such as a flexible thermplastic or an elatomeric material obtained by: 1. providing the bituminous material in the highly viscous phase, 2. providing said polymeric material in a comminuted solid phase, 3. providing a high-speed mixer apparatus having a rapidly-rotating stirrer member, 4. mixing said polymeric material into said bituminous material in said apparatus with a high shearing mixing action supplied by said rapidly-rotating stirrer member operated at a speed sufficient to supply most of the heat necessary to plasticize the comminuted material and continuing said mixing until a liquid mixture is obtained; and 5. applying the liquid mixture to said carrier.
Claim 9
Dependent Claim
136 words
An improved covering for a roof comprising a carrier having applied thereto a liquid mixture obtained from (a) a bituminous material such as a bitumen or a tar and (b) a solid polymeric material such as a flexible thermplastic or an elatomeric material obtained by: 1. providing the bituminous material in the highly viscous phase, 2. providing said polymeric material in a comminuted solid phase, 3. providing a high-speed mixer apparatus having a rapidly-rotating stirrer member, 4. mixing said polymeric material into said bituminous material in said apparatus with a high shearing mixing action supplied by said rapidly-rotating stirrer member operated at a speed sufficient to supply most of the heat necessary to plasticize the comminuted material and continuing said mixing until a liquid mixture is obtained; and 5. applying the liquid mixture to said carrier.
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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) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |