US4256858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cross-linking polymers containing active halogen
Assignee: Bayer AG
•
Filing: 1979-07-25
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Granted: 1981-03-17
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Expires: 1999-07-25
Abstract
Abstract Process for cross-linking polymers which contain an active halogen by using a compound of the formulae: ##STR1## as a cross-linking agent.
Inventors
- 👤 Sigurd Behr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C08K5/36; C08K5/45; C08K5/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A process for crosslinking polychloroprene by adding crosslinking agents, characterised in that the crosslinking agents used are compounds corresponding to the formulae: ##STR3## wherein R 1 represents hydrogen or C 1 -C 4 alkyl; R 2 represents hydrogen C 1 -C 14 alkyl, C 1 -C 14 alkoxy, C 1 -C 14 alkyl phenyl, phenyl, naphthyl, hydroxyl or C 1 -C 14 alkyl hydroxyl; R 3 and R 4 , which may be the same or different, each represents hydrogen or C 1 -C 4 alkyl; R 5 represents hydrogen or C 1 -C 4 alkyl; and R 6 and R 7 which may be the same or different, each represents hydrogen or C 1 -C 4 alkyl; and in that crosslinking is carried out in the conventional way.
Claim 2
Dependent Claim
129 words
A process for crosslinking polychloroprene by adding crosslinking agents, characterised in that the crosslinking agents used are compounds corresponding to the formulae: ##STR3## wherein R 1 represents hydrogen or C 1 -C 4 alkyl; R 2 represents hydrogen C 1 -C 14 alkyl, C 1 -C 14 alkoxy, C 1 -C 14 alkyl phenyl, phenyl, naphthyl, hydroxyl or C 1 -C 14 alkyl hydroxyl; R 3 and R 4 , which may be the same or different, each represents hydrogen or C 1 -C 4 alkyl; R 5 represents hydrogen or C 1 -C 4 alkyl; and R 6 and R 7 which may be the same or different, each represents hydrogen or C 1 -C 4 alkyl; and in that crosslinking is carried out in the conventional way.
Claim 3
Dependent Claim
33 words
A process as claimed in claim 1, characterised in that the crosslinking agent is used in quantities of from 0.1 to 15 parts, by weight, per 100 parts, by weight, of solid rubber.
Claim 4
Dependent Claim
33 words
A process as claimed in claim 1 characterised in that the crosslinking agent is used in quantities of from 0.3 to 3 parts, by weight, per 100 parts, by weight, of solid rubber.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 characterised in that crosslinking is carried out at a temperature of from 5° to 270° C.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 1 characterised in that crosslinking is carried out at a temperature of from 40° to 200° C.
Claim 7
Dependent Claim
10 words
Crosslinked polychloroprene obtained by the process claimed in claim 1.
References Cited (Backward Citations)
CA703198A
Cited
FR1310524A
Cited
US3335124A
Cited
US3379707A
Cited
US3686154A
Cited
US3844985A
Cited
US3872128A
Cited
US3919143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |