| 摘要 |
PURPOSE:To control the swelling and contraction of the titled agent with two method by integrating a polymer insolubilized in water of the homopolymer or coplymer of methylacrylamide shown by a specified general formula with a high molecular compd. having rubber elasticity. CONSTITUTION:The homopolymer or copolymer of N-alkyl or N-alkylene- substituted methacrylamide shown by formula I (R1 is H and methyl, R2 is H, methyl and ethyl and R3 is methyl, ethyl and propyl) or formula II [R1 is H and methyl and A shows -(CH2)n- wherein (n) is 4-6 and -(CH2)2-O-(CH2)2-] or the copolymer with other copolymerizable monomers is insolubilized in water. The obtained polymer is integrated with a high molecular compd. having rubber elasticity by a kneader, etc., to form a water-swelled agent. Both natural rubber and synthetic rubber can be used as the high molecular compd. having rubber elasticity.
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