B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/138, 88/40
B32B 27/08 (2006.01) B29D 11/00 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)
Patent
CA 1164327
Abstract of the Disclosure Polymer blends capable of forming hydrogels upon immersion in water are bonded by heat and pressure alone to water-resistant polymer compositions compatible with vinyl lactam polymers to form laminates. Bo ding can also be achieved by casting on the surface of the polymer composition a solution of the blend in a solvent inert to the polymer composition and evaporating the solvent. The blends are optically clear blends of vinyl lactam polymers or co- polymers with water insoluble copolymers of a hydrophobic water-insoluble ethylenically unsaturated monomer, an ethylenically asaturated monomer contain- ing an acid group, and optionally a hydrophilic ethylenically unsaturated monomer free from acidic groups. The laminate of polymer blend in water- resistant polymer composition is particularly suitable for the manufacture of articles which come into contact with body tissues and fluids such as oxygenera- tor membranes, artificial kidney membranes, catheters, shunts or tubing and contact lenses. The laminate has an improved bond strength between its components.
395152
Kendall Company (the)
Smart & Biggar
LandOfFree
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