Abstract: The present invention relates to a surface-treated plastic article including a thin layer composed of a polymer complex on the surface. The surface-treated plastic article can be produced by a treatment with at least one kind of aqueous solutions of polymers having a weight average molecular weight of 200 or more. According to the present invention, the plastic articles, such as contact lenses, having superior transparency, wettability, oxygen permeability, and mechanical properties can be provided.

Abstract: Polymers of high oxygen permeability and a low modulus of elasticity and ophthalmic lenses and contact lenses using the same are provided. The polymers are characterized in that they are obtained by copolymerizing 5 to 90 parts by weight of a monomer (SiMAA) represented by the formula below, 5 to 90 parts by weight of 3-tris (trimethylsiloxy) silyl propyl methacrylate (TRIS), 5 to 70 parts by weight of N,N-dimethyl acrylamide (DMAA) and 0.1 to 3 parts by weight of monomer having two or more copolymerizable carbon-carbon unsaturated bonds in 1 molecule (provided that the total quantity of SiMAA, TRIS and DMAA is 100 parts by weight and that the total quantity of SiMAA and TRIS is 30 to 95 parts by weight), and which are used for ophthalmic lenses.

Abstract: The present invention relates to a surface-treated plastic article including a thin layer composed of a polymer complex on the surface. The surface-treated plastic article can be produced by a treatment with at least one kind of aqueous solutions of polymers having a weight average molecular weight of 200 or more. According to the present invention, the plastic articles, such as contact lenses, having superior transparency, wettability, oxygen permeability, and mechanical properties can be provided.

Abstract: Plastic articles for medical use comprising a polymer, which polymer comprising units derived from an ethylenically unsaturated monomer having a chain containing amino and organosiloxane groups, wherein the monomer is represented by the following general formula: ##STR1## (where X is an ethylenically unsaturated polymerizable group; each R.sup.1 is, independently, selected from a hydrogen atom, unsubstituted and substituted alyl groups, unsubstituted and substituted aryl groups and the groups (CH.sub.2).sub.r COOR.sup.3 and (CH.sub.2).sub.r ONR.sup.4 R.sup.5 ; each of m, n and p, independently, is selected from 0 and 1; each of q and r, independently, is any of zero and 1 to 10; and R.sup.2 is a substituent group containing an organosiloxane group, each of R.sup.3, R.sup.4 and R.sup.5, independently, is a group of R.sup.1 or is a group having a heterocyclic group, or R.sup.4 and R.sup.

Abstract: A maleimide polymer comprises units derived from a maleimide derivative represented by the following general formula (I): ##STR1## where R.sup.1 is a hydrogen atom or a methyl group, and R.sup.2 is an alkyl, alkenyl or aryl group, each of which groups is substituted by at least one organosiloxane group or fluorine atom, or comprises a copolymer of (1) a maleimide derivative represented by the formula (I) but in which R.sup.2 may be hydrogen or any optionally substituted aliphatic hydrocarbon or aryl group with (2) an alkyl or fluoroalkyl methacrylate or an organosiloxy styrene- or organosiloxy-(meth)acrylic acid derivative.The polymer material may be formulated into contact lenses high in oxygen permeability and having good mechanical properties.

Abstract: An oxygen-permeable contact lens consisting essentially of a polymer having an organic polysiloxane skeleton and a three-dimensional crosslinked structure, and a process for the preparation thereof.

Abstract: A method for the manufacture of shaped article of hydrogel is provided. This shaped article of hydrogel is obtained by the polymerization in a mold of a mixture comprising:A. an alkylene glycol mono(meth)acrylate or a monomer mixture consisting preponderantly of an alkylene glycol mono(meth)acrylate,B. a polymer synthesized from a component A and possessing a polymerizable double bond in the molecular unit thereof,C. a water-soluble dipolar aprotic solvent, andD. at least one member selected from the group consisting of (a) water-soluble organic acids, (b) surface active agents, and (c) water-soluble organic substances which are poor solvents or non-solvents of the component B, and having the weight ratio of the component A to the component B in the range of 45:55 to 20:80.