Hydrophilic three dimensional polymer and a method for productio

Details Hydrophilic three dimensional polymer and a method for productio Hydrophilic three dimensional polymer and a method for productio

1985-04-02

1986-08-05

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263031, 5263077, 526320, C08F22040

Patent

active

046044400

ABSTRACT:
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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