Rubberized coal tar pitch emulsion
Abstract
Abstract Improved rubberized coal tar emulsion compositions especially suitable for sealing bituminous pavement compositions, such as asphalt pavement compositions. A composition according to the invention comprises a major portion of a prepared coal tar pitch emulsion and water, having admixed therewith a small amount of an acrylonitrile/butadiene copolymer latex having an extraordinarily small particle size. Preferred compositions additionally include a silicone resin. The compositions further include an appropriate aggregate filler material such as sand. Compositions according to the invention are characterized by a thixotropic nature and the ability to maintain an aggregate in matrix like suspension. A film cast from such compositions applied as a sealing coat to an asphalt pavement is characterized by long life, uniform filler distribution, and excellent bonding characteristics.
Inventors
- 👤 J Walaschek
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |