Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-05-17
1996-01-23
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 59, 523324, 528499, 528500, 528501, C08L 9500, C08F 600
Patent
active
054865549
ABSTRACT:
A low cost method for preparing foamed or aerated asphalt-rubber paving compositions is provided wherein a flowable mixture including respective quantities of asphalt and finally divided reclaimed rubber particles is first directed into a rocket-type reactor along with steam and/or water, thereby subjecting the mixture to conditions of elevated temperature, pressure and shear. Thereafter, the initially reacted mixture is passed into a pressurized, secondary reaction vessel system in order to complete the gelation reaction in a period of, e.g., 7-15 minutes. The preferred apparatus (10) includes a rocket-type primary reactor (12) presenting a confined reaction zone (20); asphalt-rubber and water/steam conduits (42, 48) communicate with the zone (20). The output (24) of the primary reactor (12) feeds directly into a pressurized tank (66) forming a part of the downstream secondary reaction and recovery system (14), where the gelation reaction is completed. The preferred system (14) includes a total of five serially interconnected tanks (66-74) housed within an insulative shell (108) and heated by means of burner (110).
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An article from a Nov. 1969 publication-The Municipal South, entitled "Sealing and Patching Streets and Highways": by Ladis H. Csanyi concerning the production and application of foamed asphalt.
A paper entitled Foamed Asphalt in Oklahoma: A Beginning, by C. Dwight Hixon and E. B. Kidd, II, published by the Research and Development Division, Oklahoma Department of Transportation dealing with the field application of foamed asphalt.
A collection of documents comprising the pages dealing with foamed asphalt applications, including a letter dated Nov. 10, 1981, and attached report from the Department of Transportation, State of Maine, concerning a failed field trial on a foamed asphalt application, a form letter from Ultra-Technologies, Inc. describing a foamed asphalt system under the trademark ASFOAM with attached page entitled "How ASFOAM works", a CONOCO Newsletter dated Nov. 20, 1980 setting forth papers on FOAMIX pavements, sales material and invoice for an Ultra-Technologies LTU1 foamed asphalt lab test unit including a sketch, component reference, and photograph of a foamed asphalt particle.
Conoco Newsletter, Nov., 1980; Ref.: 80-55 re Foamix Update.
Conoco Newsletter, Aug., 1980; Ref.: 80-54 re Foamix Update.
Coanyl; Sealing and Patching Streets and Highways, The Municipal South, Sep., 1960, pp. 19-22.
Abel, Foamed Asphalt Base Stabilization; Sixth Annual Asphalt Paving Seminar, Dec. 7-8, 1978: Colorado State University.
Hixon, et al.; Foamed Asphalt in Oklahoma: A Beginning; Feb., 1981; Oklahoma Department of Transportation.
DeWitt LaVonda R.
Michl Paul R.
Ultra-Technologies, Inc.
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