Polymer coating and curing process for catheters
AssigneeThe Kendall Company
InventorJong Joung
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Abstract
The curing or cross-linking of fluorinated alkoxy phosphonitrile polymers with organic peroxides is accelerated by the use of a trialkyl aluminum or a dialkyl aluminum hydride. The coating with such polymers of biomedical articles such as embolectomy catheters or Foley retention catheters made of natural or synthetic rubber is facilitated by using for the coating a solution of such polymers in an organic solvent together with an organic peroxide and the new accelerating catalyst.
Claims3
In a method of coating catheters made of natural or synthetic elastomers with a solution in an organic solvent of an organic peroxide cross-linking agent, and a linear polymer containing randomly distributed repeating units having the structures:
- ##STR2## wherein A represents X(CF.sub.2).sub.m CH.sub.2 O- and B represents Y(CF.sub.2).sub.n CH.sub.2 O-, X and Y each being selected from the group consisting of hydrogen and fluorine, and m and n each being an integer from 1 to 8 inclusive, and
- the improvement wherein there is included along with the organic peroxide an alkyl aluminum compound having the composition
- Al R.sub.1 R.sub.2 R.sub.3
- wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl having from 2 to 8 carbon atoms and R.sub.2 and R.sub.3 are alkyl having from 2 to 8 carbon atoms.
Dependencies are inferred from the claim text.