Method for bonding silicone rubber and polyurethane materials and articles manufactured thereby
AssigneeCorvita Corporation
InventorLeonard Pinchuk
Life of this patent
Estimating the term…
Abstract
A method for applying a silicone rubber material to polyurethane is described wherein a previously processed polyurethane material can be strongly bonded to a silicone rubber material. The silicone rubber material is applied to the polyurethane in a solution and is preferably an acetoxyterminated silicone material, a halogen-terminated silicone material or a combination thereof. The polyurethane and the silicone rubber material are heated at a temperature above about 70.degree. C. to bond the two materials together more strongly than would otherwise occur in the absence of heat.
Claims19
A method for applying a silicone rubber material, comprising:
- supplying a base material having an exposed surface which includes a polyurethane;
- applying an uncured silicone rubber material to said exposed polyurethane surface of the base material, said silicone rubber material being an acetoxy-terminated siloxane, a halogenterminated siloxane or a combination thereof said acetoxy and halogen moieties being bonded directly to silicon in said rubber material;
- heating said base material at a temperature above about 70.degree. C. to condition said polyurethane surface for bonding said silicone rubber material to said polyurethane;
- and
- curing said silicone rubber material;
- whereby said heating of said base material provides a bond between said silicone rubber material and said polyurethane which is stronger than a bond which occurs between said polyurethane and said silicone rubber material in the absence of said heating step.
A method for applying a silicone rubber material to a polyurethane surface, comprising:
- supplying a base material having an exposed surface which includes a polyurethane;
- applying a silicone rubber material to said base material, said silicone rubber material being an acetoxyterminated siloxane, a halogen-terminated siloxane or a combination thereof, said acetoxy and said halogen moieties are bonded to a silicon in said rubber material;
- heating said base material at a temperature above about 70.degree. C. to condition said base material to bond said silicone rubber material to said polyurethane;
- and
- whereby said heating of at least said base material provides a bond between said silicone rubber material and said polyurethane which is stronger than a bond which occurs between said polyurethane and said silicone rubber material in the absence of said heating step.
In a method for applying a solution containing a silicone rubber material to a polyurethane to bond the silicone rubber material to the polyurethane, the improvement comprising:
- heating a polyurethane material at a temperature above about 70.degree. C. to bond the silicone rubber material to said polyurethane, said heating of said polyurethane, said heating of said polyurethane providing a bond between said silicone rubber material and said polyurethane which is stronger than a bond between said polyurethane and said silicone rubber material which occurs in the absence of said heating step, said silicone rubber material being an acetoxy-terminated siloxane, a halogen-terminated siloxane or a combination thereof, said acetoxy and halogen moieties being bonded directly to silicon in said rubber materials;
- and
- blowing hot air on said base material and said rubber material during said heating step.
Dependencies are inferred from the claim text.