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7 条记录 (耗时 0.016 秒)

    Process for tanning leather
    1.
    发明授权
    Process for tanning leather 失效
    鞣制皮革的工艺

    公开(公告)号：US4810252A

    公开(公告)日：1989-03-07

    申请号：US104252

    申请日：1987-10-05

    申请人： Hermann Becker ,  Werner Lotz ,  Karlfried Keller

    发明人： Hermann Becker ,  Werner Lotz ,  Karlfried Keller

    IPC分类号： C14C3/18

    CPC分类号： C14C3/18

    摘要： Use of a resin mixture of, or of a mixed resin from, a melamine-formaldehyde resin and an anionically modified melamine-formaldehyde resin for tanning leather. The anionic modification of the melamine-formaldehyde resin is obtained by preparing the resin in the presence of alkali metal sulfite, alkali metal hydrogensulfite or alkali metal sulfamate. By partial modification it is possible to obtain a mixed resin, while mixing a modified with an unmodified resin gives a resin mixture.

    摘要翻译： 使用来自三聚氰胺 - 甲醛树脂和阴离子改性的三聚氰胺 - 甲醛树脂的树脂混合物或混合树脂用于鞣皮革。 三聚氰胺 - 甲醛树脂的阴离子改性通过在碱金属亚硫酸盐，碱金属亚硫酸氢盐或碱金属氨基磺酸盐的存在下制备树脂而获得。 通过部分改性，可以获得混合树脂，同时用未改性树脂混合改性树脂混合物。

    Processing for tanning leather
    2.
    发明授权
    Processing for tanning leather 失效
    加工鞣皮革

    公开(公告)号：US4822372A

    公开(公告)日：1989-04-18

    申请号：US95136

    申请日：1987-09-11

    申请人： Frank Forster ,  Karlfried Keller ,  Hermann Becker ,  Werner Lotz

    发明人： Frank Forster ,  Karlfried Keller ,  Hermann Becker ,  Werner Lotz

    IPC分类号： C14C3/18

    CPC分类号： C14C3/18

    摘要： An improved process for tanning leather by treating animal skins with a water-soluble melamine-formaldehyde resin in the presence of an acid catalyst towards the end is improved by using a melamine-formaldehyde resin which is at least partially etherified with a glycol ether, alkyl glycol ether, or both.

    摘要翻译： 通过使用三聚氰胺甲醛树脂来改善通过在酸催化剂存在下使水溶性三聚氰胺 - 甲醛树脂在末端处理动物皮肤来改善皮革的改进方法，所述三聚氰胺甲醛树脂至少部分地与二醇醚醚化，烷基 乙二醇醚或二者。

    Preparation of methoxy-methyl melamines
    4.
    发明授权
    Preparation of methoxy-methyl melamines 失效
    甲氧基甲基三聚氰胺的制备

    公开(公告)号：US4223141A

    公开(公告)日：1980-09-16

    申请号：US51851

    申请日：1979-06-25

    申请人： Hans Honel ,  Karlfried Keller ,  Walter Michel ,  Manfred Schon

    发明人： Hans Honel ,  Karlfried Keller ,  Walter Michel ,  Manfred Schon

    IPC分类号： C07D251/64 ,  C08G12/42

    CPC分类号： C07D251/64 ,  C08G12/427

    摘要： This invention relates to a process for the manufacture of methanol-etherified methylolmelamines which are largely monomeric containing more than 5 mols of formaldehyde and more than 4 mols of methyl-etherified methylol groups, per mol of melamine, and having a viscosity of less than 20 pascal-seconds at 25.degree. C. and a solids content of at least 95%, comprising (a) methylolating melamine with formaldehyde at a molar melamine:formaldehyde ratio of 1:6.5 to 1:8 for 11/2 to 5 hours at 50.degree. C. to 85.degree. C., with the formaldehyde source being an aqueous solution of formalin containing 30 to 50% by weight of formaldehyde and having a pH of 6.7 to 7.3, and (b) etherifying the resulting suspension of methylolmelamine with 15 to 30 mols of methanol per mol of melamine at temperatures of 30.degree. C. to 60.degree. C. in the presence of a strong acid.

    摘要翻译： 本发明涉及甲醇醚化的羟甲基三聚氰胺的制备方法，其主要是单体含有超过5摩尔的甲醛和超过4摩尔的甲基醚化的羟甲基，每摩尔三聚氰胺，并且粘度小于20 在25℃下的帕斯卡 - 秒和至少95％的固体含量，其包含（a）三聚氰胺与甲醛以三聚氰胺：甲醛比为1:6.5至1:8的羟甲基化作用，在50℃下11/2至5小时 甲醛源为甲醛水溶液，含有30至50重量％的甲醛，pH值为6.7至7.3，（b）将所得羟甲基三聚氰胺悬浮液用15份醚化至 在强酸存在下，在30℃至60℃的温度下，每摩尔三聚氰胺30摩尔甲醇。

    Preparation of melamine derivatives
    5.
    发明授权
    Preparation of melamine derivatives 失效
    梅林衍生物的制备

    公开(公告)号：US4143016A

    公开(公告)日：1979-03-06

    申请号：US875307

    申请日：1978-02-06

    申请人： Hans Honel ,  Karlfried Keller ,  Walter Michel ,  Manfred Schon

    发明人： Hans Honel ,  Karlfried Keller ,  Walter Michel ,  Manfred Schon

    IPC分类号： C07D251/64 ,  C08L61/28

    CPC分类号： C07D251/64

    摘要： A process for the preparation of a substantially monomeric methylolmelamine etherified by methanol which contains per mol of melamine, more than 5 mols of formaldehyde and more than 4 mols of methyl-etherified methylol groups which has a viscosity of less than 10 Pa.s at 25.degree. C. at a solids content of at least 95%, said process comprising reacting melamine and formaldehyde in a molar ratio of from 1 : 6.2 to 1 : 8, at a temperature of from 40 to 60.degree. C., in the presence of a basic catalyst in a reaction mixture which contains from 10 to 40% by weight of water and from 40 to 20% by weight of methanol thereby producing a suspension of methylolmelamine, and then etherifying the methylol melamine in the presence of from 15 to 30 mols of methanol per mol of melamine, at a temperature of from 25 to 50.degree. C., in the presence of a strong acid.