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    Production of fine-fibred, acid-soluble polymerised substances and their use for the production of non-woven fabrics, paper and cardboard
    9.
    发明专利
    Production of fine-fibred, acid-soluble polymerised substances and their use for the production of non-woven fabrics, paper and cardboard 未知

    公开(公告)号：GB1067616A

    公开(公告)日：1967-05-03

    申请号：GB4908463

    申请日：1963-12-12

    Applicant: BASF AG

    Inventor： BRUENING DIETHELM ,  LINGE HERMANN

    IPC: C08J3/14 ,  D01D5/06 ,  D01D5/11 ,  D01D5/40 ,  D01F6/00 ,  D01F6/60

    Abstract: Fine fibres suitable for use in making papers, or cardboards are made by dissolving a polymer in an acid and reprecipitating it by diluting the acid solution with water with the use of a high shearing stress. In the example, polyhexamethylene adipamide is dissolved in sulphuric acid and the solution is dripped into water in a vessel provided with stirring means and baffles. After separation of the fibres, the diluted acid may be concentrated for reuse. Other acids referred to are hydrochloric, phosphoric and formic. Suitable polymers are polyhexamethylene - adipamide, polycaprolactam, polyacrylonitrile and polyethylene terephthalate. The fibres obtained may be processed alone or mixed with other natural or synthetic fibres on a paper-making machine to form non-woven fabrics, papers or cardboards. The fibres can be made to cohere by heating in the presence of water at temperatures below the softening points of the polymers.

    Compositions for coating paper
    10.
    发明专利
    Compositions for coating paper 未知

    公开(公告)号：GB974925A

    公开(公告)日：1964-11-11

    申请号：GB1733163

    申请日：1963-05-02

    Applicant: BASF AG

    Inventor： WOLF HANS ,  BRUENING DIETHELM ,  WILHELM HANS

    IPC: C07F9/22 ,  C07F9/6584 ,  C08G79/02 ,  D21H19/58

    Abstract: A paper-coating composition comprises an aqueous copolymer dispersion, an aqueous starch solution and a pigment wherein the copolymer contains 0.1 to 10% by wt. of a N-methylolamide of an unsaturated polymerizable carboxylic acid and at least 10% by weight of an ester of methacrylic and/or acrylic acid in polymerized form. The amide is preferably N-methylol-acrylamide or N-methylol-methacrylamide. The copolymer may also contain vinyl propionate and acrylic acid. The exemplified pigments are kaolin and china clay. Other additives such as sodium polyacrylate may be present.ALSO:Paper is coated with a composition which comprises an aqueous copolymer dispersion, an aqueous starch solution and a pigment, wherein the copolymer contains 0,1-10% by weight of a p N-methylolamide of an unsaturated polymerizable carboxylic acid and at least 10% by weight of an ester of acrylic and/or methacrylic acid in polymerized form. The amide is preferably N-methylol-acrylamide or -methacrylamide. Other monomers exemplified are vinyl propionate and acrylic acid. Exemplified pigments are kaolin and china clay. Other additives such as sodium polyacrylate may be present. The composition is applied by means of a roller applicator apparatus.

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