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公开(公告)号：US3836395A
公开(公告)日：1974-09-17
申请号：US24547172
申请日：1972-04-19
Applicant: BASF AG
Inventor： ROLLER H , STRITZINGER H , HARTMANN J , FALK R , BALZ W
CPC classification number: G11B5/845
Abstract: A process for the manufacture of magnetic recording media exhibiting good orientation of the magnetic particles by coating a base with a viscous liquid dispersion of magnetic pigment, orienting the applied magnetizable particles by means of a magnetic field and drying the applied magnetic pigment dispersion. According to the invention, the magnetic pigment dispersion is subjected, immediately prior to the coating operation, to shear at a specific minimum shear rate gradient.
Abstract translation: 一种制造磁性记录介质的方法，其通过用磁性颜料的粘性液体分散体涂覆基底来使磁性颗粒呈现良好的取向，通过磁场定向施加的可磁化颗粒并干燥所施加的磁性颜料分散体。 根据本发明，磁性颜料分散体在涂覆操作之前立即以特定的最小剪切速率梯度剪切。
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公开(公告)号：US3793074A
公开(公告)日：1974-02-19
申请号：US3793074D
申请日：1972-01-13
Applicant: BASF AG
Inventor： FRANKENTHAL K , SCHNELL G , BALZ W , PRUEGL R , HARTMANN J , STRITZINGER H
CPC classification number: G11B5/7023
Abstract: Manufacture of magnetic recording media by preparing a dispersion of particulate magnetic pigment in a binder based on a mixture of polycondensates with the addition of organic solvents and, optionally, conventional additives, applying a coating of said dispersion to the substrate and finally drying or curing the coating. The binder used for the dispersion of magnetic pigment consists of a mixture of phenol/formaldehyde condensates and thermoplastic polyester of terephthalic and isophthalic acids and ethylene glycol and neopentyl glycol.
Abstract translation: 通过在基于缩聚物的混合物的基础上制备颗粒状磁性颜料在添加有机溶剂和任选的常规添加剂的混合物中制备磁记录介质，将所述分散体的涂层施加到基底上，最后干燥或固化 涂层。 用于磁性颜料分散的粘合剂由苯酚/甲醛缩合物和对苯二甲酸和间苯二甲酸和乙二醇和新戊二醇的热塑性聚酯的混合物组成。
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公开(公告)号：DK274282A
公开(公告)日：1982-12-20
申请号：DK274282
申请日：1982-06-18
Applicant: BASF AG
Inventor： LINDHART F , HARTMANN J , JUNG D , HARTMANN H , BURKERT H , HEIDE W
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