Methods of forming permeation-resistant, silicone elastomer-cont

Details Methods of forming permeation-resistant, silicone elastomer-cont Methods of forming permeation-resistant, silicone elastomer-cont

1989-03-13

1991-02-12

Pianalto, Bernard

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

427230, 427333, 427336, 427387, 4273935, 4274121, 428412, 4284255, 428447, 623 8, B29D 2200

Patent

active

049923129

ABSTRACT:
A method of making a permeation-resistant silicone elastomer-containing laminate useful for making fluid-containing implants such as mammary prostheses and gastric balloons. The method is accomplished by (a) applying a layer of an unvulcanized heat-curable silicone elastomer composition to a cured silicone elastomer substrate, (b) applying a layer of a solvent dispersion of a permeation-resistant elastomer and a solvent on the layer of unvulcanized silicone elastomer composition to form a three-layered laminate, and (c) exposing the three-layered laminate to heat until the unvulcanized silicone elastomer composition is vulcanized. The unvulcanized silicone elastomer composition must be bondable to the cured silicone elastomer substrate, the permeation-resistant elastomer is selected from the group consisting of polyurethane, silicone-polyurethane copolymer, and silicone-polycarbonate copolymer, and the permeation-resistant elastomer solvent must be compatible with both the permeation-resistant elastomer and the unvulcanized silicone elastomer composition.

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patent: 4455691 (1984-06-01), Redinger et al.
patent: 4592755 (1986-06-01), Penton et al.
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