Silane copolymer coatings
AssigneeC. R. Bard, Inc.
InventorsRichard N. Terry, Kevin Walsh
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Abstract
The invention is drawn to silane copolymers prepared from the reaction of one or more polyisocyanates with one or more lubricious polymers having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group and with one or more organo-functional silanes having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group and at least one functional group reactive with a silicone rubber substrate. The silane copolymer coatings of the invention are elastic, lubricious, and resist wet abrasion. They are useful as coatings for polysiloxane (rubber) and other difficult to coat substrates, especially for medical devices, such catheters.
Claims60
An article of manufacture comprising a polysiloxane rubber substrate and a silane copolymer coating wherein the coating comprises an organo-functional silane having at least one functional group that is reactive with an isocyanate group and an isocyanate-containing polymer and wherein the coating forms a layer covering the surface of the rubber substrate.
A process for preparing a silane copolymer comprising reacting (1) one or more polyisocyanates with (2) one or more polymers having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group and with (3) one or more organo-functional silanes having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group, and having at least one functional group reactive with a silicone rubber substrate.
A silane copolymer comprised of one or more polyisocyaantes, one or more organo-functional silanes, and one or more polyols.
A coating comprising a silane copolymer wherein the copolymer comprises an organo-functional silane having at least one functional group that is reactive with an isocyanate group and an isocyanate-containing polymer.
A coating comprising a primer coat and top coat wherein the primer coat comprises an organo-functional silane having at least one functional group that is reactive with an isocyanate group and an isocyanate-containing polymer.
Dependencies are inferred from the claim text.