US4394205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for vulcanization bonding of fluorine-containing elastomers to vulcanized natural and synthetic elastomers
Assignee: Lord Corp
•
Filing: 1982-03-15
•
Granted: 1983-07-19
•
Expires: 2002-03-15
Abstract
Abstract A method for bonding unvulcanized fluorinated elastomers to vulcanized non-fluorinated elastomers comprising exposing the vulcanized elastomer to a fluorinating agent; applying a conventional fluorinate elastomer adhesive to the treated vulcanized elastomer; contacting the adhesive-coated portion of the vulcanized elastomer with the unvulcanized fluorinated elastomer; and curing in situ the fluorinated elastomer. Sulfur tetrafluoride is a preferred fluorinating agent.
Inventors
- 👤 Donald R. Blenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:53
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/126; C08J5/00; C08J5/12; C08J5/124; C08J2321/00; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536; Y10T428/3154
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A method for bonding an unvulcanized fluorinated elastomer to a previously vulcanized non-fluorinated elastomer, wherein saud unvulcanized elastomer is cured in situ against said vulcanized elastomer, said method comprising: exposing at least one surface of said vulcanized elastomer to a fluorine-containing compound selected from the group consisting of sulfur tetrafluoride, boron trifluoride and phosphorus pentafluoride; coating at least a portion of said at least one surface which has been exposed to said fluorine-containing compound with (a fluorinated elastomeric) an adhesive for fluorinated elastomers; applying to the adhesive-coated portion of said at least one surface an unvulcanized fluorinated elastomer composition; and curing said unvulcanized fluorinated elastomer composition.
Claim 2
Independent Claim
106 words
A method for bonding an unvulcanized fluorinated elastomer to a previously vulcanized non-fluorinated elastomer, wherein saud unvulcanized elastomer is cured in situ against said vulcanized elastomer, said method comprising: exposing at least one surface of said vulcanized elastomer to a fluorine-containing compound selected from the group consisting of sulfur tetrafluoride, boron trifluoride and phosphorus pentafluoride; coating at least a portion of said at least one surface which has been exposed to said fluorine-containing compound with (a fluorinated elastomeric) an adhesive for fluorinated elastomers; applying to the adhesive-coated portion of said at least one surface an unvulcanized fluorinated elastomer composition; and curing said unvulcanized fluorinated elastomer composition.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said fluorine-containing compound comprises sulfur tetrafluoride.
Claim 4
Dependent Claim
15 words
A method according to claim 2 wherein said fluorinated elastomer comprises vinylidene fluoride-hexafluoropropylene copolymer elastomer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |