HYDROPHILIC THRE-DIMENSIONAL POLYMER AND METHOD OF ITS PRODUCTION
Hydrophilic three dimensional polymers, the prevailing mass of which is formed by structural units corresponding to monomers miscible with water at any ratio, and the method for their production, wherein one weight part of the monomers miscible with water is copolymerized, by the effect of free-radi...
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| creator | TREKOVAL,JIRI,CS VACIK,JIRI,CS MICHALEK,JIRI,CS WICHTERLE,OTTO,CS |
| description | Hydrophilic three dimensional polymers, the prevailing mass of which is formed by structural units corresponding to monomers miscible with water at any ratio, and the method for their production, wherein one weight part of the monomers miscible with water is copolymerized, by the effect of free-radical initiators, with 0.01 to 1 weight part of a polyfunctional unsaturated oligomer, which is prepared with an average degree of polymerization x=3 to x=100 by the anionic polymerization of allyl methacrylate, with the contingent addition of methacrylonitrile or methacrylic esters of univalent saturated alcohols containing 1 to 4 carbon atoms or methacrylic esters of monohydroxy compounds containing at least one etheric oxygen atom in the chain, or where 0.7 to 1 weight part of monomers miscible with water is copolymerized with 0.01 to 0.3 weight parts of hydrophobic monomers of the alkyl methacrylate or acrylate type in the presence of an oligomeric crosslinking agent with at least two olefinic double bonds added in the amount of 0.01 to 0.1 weight parts, advantageously up to 0.05 weight parts, by the effect of free-radical initiators. |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON CONTACT LENSES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | HYDROPHILIC THRE-DIMENSIONAL POLYMER AND METHOD OF ITS PRODUCTION |
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