Method for vulcanization bonding of fluorine-containing elastomers to vulcanized natural and synthetic elastomers
AssigneeLord Corporation
InventorDonald R. Blenner
Life of this patent
Estimating the term…
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.
Claims3
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.
Dependencies are inferred from the claim text.