Method for bonding silicone rubber and polyurethane materials and articles manufactured thereby
First Claim
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1. 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°
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.
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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° C. to bond the two materials together more strongly than would otherwise occur in the absence of heat.
228 Citations
19 Claims
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1. A method for applying a silicone rubber material, comprising:
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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°
C. to condition said polyurethane surface for bonding said silicone rubber material to said polyurethane; andcuring 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for applying a silicone rubber material to a polyurethane surface, comprising:
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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°
C. to condition said base material to bond said silicone rubber material to said polyurethane; andwhereby 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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. 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:
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heating a polyurethane material at a temperature above about 70°
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; andblowing hot air on said base material and said rubber material during said heating step. - View Dependent Claims (16, 17, 18, 19)
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Specification