US3876440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable solutions of n-halogeno-aryl-sulfonamides and the use thereof for pre-treating rubber surfaces
Assignee: LW-FULLER GmbH
•
Filing: 1973-02-05
•
Granted: 1975-04-08
•
Expires: 1993-02-05
Abstract
Abstract Stable solutions of an N-halogenosulfonamide of an aromatic sulfonic acid consisting essentially of 1 to 30 parts by weight of said N-halogeno-aryl-sulfonamide and 99 to 30 percent by weight of a solvent mixture containing from 10 to 90 percent by weight of methylene chloride and 90 to 100 percent by weight of 2-methyl-propanol-2. The method of pre-treating the surface of vulcanized natural or synthetic rubber or of thermoplastic rubber with such a solution to improve the adhesion of said rubber when subsequently adhered with an adhesive such as a polyurethane.
Inventors
- 👤 Gerhard Endriss
- 👤 Heinz Libossek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/126; C09; C09J; C09J175/00; C09J175/04; C09J175/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A STABLE NEUTRAL OR ACID SOLUTION OF AN N-CHLOROSULFONAMIDE OF BENZENE SULFONIC ACID OR TOLUENE SULFONIC ACID, SAID SOLUTION CONSISTING ESSENTIALLY OF 1 TO 30 PERCENT BY WEIGHT OF SAID N-CHLORO-SULFONAMIDE AND 99 TO 70 PERCENT BY WEIGHT OF A SOLVENT MIXTURE CONTAINING 10 TO 90 PERCENT BY WEIGHT OF METHYLENE CHLORIDE AND 90 TO 10 PERCENT BY WEIGHT OF 2METHYL-PROPANOL-2.
Claim 2
Dependent Claim
61 words
A STABLE NEUTRAL OR ACID SOLUTION OF AN N-CHLOROSULFONAMIDE OF BENZENE SULFONIC ACID OR TOLUENE SULFONIC ACID, SAID SOLUTION CONSISTING ESSENTIALLY OF 1 TO 30 PERCENT BY WEIGHT OF SAID N-CHLORO-SULFONAMIDE AND 99 TO 70 PERCENT BY WEIGHT OF A SOLVENT MIXTURE CONTAINING 10 TO 90 PERCENT BY WEIGHT OF METHYLENE CHLORIDE AND 90 TO 10 PERCENT BY WEIGHT OF 2METHYL-PROPANOL-2.
References Cited (Backward Citations)
US1229486A
Cited
US3553857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |