164.
    发明专利
    未知

    公开(公告)号:DE3901325A1

    公开(公告)日:1990-07-19

    申请号:DE3901325

    申请日:1989-01-18

    Applicant: BASF AG

    Abstract: The agent contains as film-formers copolymers based on tert.-butyl acrylate and/or tert.-butyl methacrylate with a K value of 10 to 50, obtainable by free-radical polymerisation of A) 75 to 99 % by weight of tert.-butyl acrylate and/or tert.-butyl methacrylate, B) 1 to 25 % by weight of acrylic acid and/or methacrylic acid and C) 0 to 10 % by weight of another monomer which can undergo free- radical copolymerisation, where the carboxyl groups of the copolymers are completely or partially neutralised by amines.

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