8.
    发明专利
    未知

    公开(公告)号:BR9600978A

    公开(公告)日:1997-12-30

    申请号:BR9600978

    申请日:1996-03-11

    Applicant: HOECHST AG

    Abstract: Anionic polymer mixts. (I) with reduced prodn. of foam in water, contg. (a) an opt. neutralised or partly neutralised acid gp.-contg. polymer (A), obtd. by polymerisation of COOH gp.-contg. unsatd. cpds. with other ethylenically unsatd. cpds. in the presence of volatile basic neutralising agents (II), and opt. (b) a water-insol. polymer (B) in the form of latex particles, obtd. by emulsion polymerisation of ethylenically unsatd. cpds. in the presence of polymer (A). Also claimed is the prodn. of (I) by (a) producing polymer (A) as above and opt. producing polymer (B) in the presence of neutralised or partly neutralised (A). Pref. polymer (A) has an acid no. of 90-400 mg KOH/g and a Tg of 0-180 degrees C. Reagents (II) are basic cpds. which do not form covalent bonds with carboxyl gps. under the reaction conditions.

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