Provided is a novel copolymer that can express an excellent calcium ion-trapping ability. The copolymer of the present invention includes: 0.1 mol% to 99 mol% of a structural unit (A) derived from a monoethylenically unsaturated monocarboxylic acid (salt) monomer (a); 0.1 mol% to 99 mol% of a structural unit (B) derived from a monomer (b) serving as a monoethylenically unsaturated dicarboxylic acid (salt) or an anhydride thereof; and 0.1 mol% to 50 mol% of a structural unit (C) derived from an ether bond-containing hydrophobic monomer (c).
WATER-SOLUBLE FILM AND METHOD FOR MANUFACTURING SAME
申请人:Nippon Shokubai Co., Ltd.
公开号:EP3395909A1
公开(公告)日:2018-10-31
The present invention provides a water-soluble film having excellent solubility in cold water, high strength, and excellent hard-water resistance. The present invention also provides a method for simply producing such a water-soluble film. One aspect of the present invention relates to a water-soluble film including a polymer containing an anionic group other than a sulfonic acid (salt) group, and a water-soluble resin. The anionic group-containing polymer excludes an acrylic acid homopolymer. Another aspect of the present invention relates to a method for producing a water-soluble film that includes a polymer containing an anionic group other than a sulfonic acid (salt) group, and a water-soluble resin. The method includes mixing a polymer containing an anionic group other than a sulfonic acid (salt) group and a water-soluble resin.
Provided is a binder that has satisfactory storage stability and can express an excellent bonding strength for a glass fiber or powdered glass (impart a satisfactory strength to a bonded body with the glass fiber or the powdered glass). The binder of the present invention includes: a polymer having a hydroxyl group, in which: the polymer contains a specific structural unit derived from a monomer represented by the general formula (1) and a specific structural unit derived from a monomer containing a carboxylic acid (salt) group; a content of the structural unit derived from the monomer represented by the general formula (1) is from 5 mol % to 40 mol % with respect to 100 mol % of structural units derived from all monomers; a content of the structural unit derived from the monomer containing a carboxylic acid (salt) group is from 60 mol % to 95 mol % with respect to 100 mol % of the structural units derived from all the monomers; 2 mol % or more of the carboxylic acid (salt) groups in the polymer are neutralized with a volatile base and/or a nonvolatile base; 0 mol % to 15 mol % of the carboxylic acid (salt) groups in the polymer are neutralized with the nonvolatile base; and 0 mol % to 50 mol % of the carboxylic acid (salt) groups in the polymer are neutralized with the volatile base.