C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/106, 88/97
C08J 7/04 (2006.01) B29C 41/00 (2006.01) C08B 15/06 (2006.01) C08F 290/10 (2006.01) C08F 299/00 (2006.01) C08J 5/00 (2006.01) G02B 1/04 (2006.01) G02B 1/10 (2006.01)
Patent
CA 1323739
MOLDED POLYMERS WITH HYDROPHILIC SURFACES, AND PROCESS FOR MAKING THEM Abstract of the Disclosure Polymer composites are described which consist of a 0.1-500micron thick film of a preshaped, surface-forming hydrophilic first polymer A covalently grafted onto an underlaying bulk and structural second polymer B and which are prepared by polymerizing said second polymer B on a substrate which is coated with the hydrophilic first polymer A, said first polymer being able to co-react with the monomers used to prepare the second polymer B. Because of their continuous nature and covalent bonding, the hydrophilic surface films of polymer A adhere tightly to the underlaying polymer B and also conform exactly to the con- figuration of the substrate or mold; polymers with such permanently modified surfaces are useful as biocompatible materials, for instance as contact lenses or as low-friction or non-blocking elastomers, as well as non-fogging, washable and printable polymers. The instant process can also be adopted to prepare the reverse type of polymer composite comprising a hydrophilic polymer with a thin hydrophobic or lipophobic surface. Such composites can be used as membranes, release-rate controlling devices and solvent and soil-resistant polymers.
612794
Harisiades Paul
Heiber Sonia J.
Mueller Karl F.
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Harisiades Paul
Heiber Sonia J.
Mueller Karl F.
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