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公开(公告)号：US5300244A
公开(公告)日：1994-04-05
申请号：US952197
申请日：1992-09-28
申请人： Chiaki Mizuno , Masatoshi Kiyama , Takao Komi , Hiroshi Ogawa , Masaaki Fujiyama , Shinichi Funabashi
发明人： Chiaki Mizuno , Masatoshi Kiyama , Takao Komi , Hiroshi Ogawa , Masaaki Fujiyama , Shinichi Funabashi
CPC分类号： G11B5/84 , B29B7/7461
摘要： A method of preparing a magnetic coating composition comprises a first process for kneading ferromagnetic grains, a binder and a binder solution Y1 by use of a two-shaft continuous kneading and mixing machine to obtain a kneaded mixture K1 having a solid content within the range of 65 wt % to 95 wt %, a second process for kneading a binder solution Y2 and the kneaded mixture K1 by use of the two-shaft continuous kneading and mixing machine to obtain a primary diluted mixture K2 having a solid content within the range of 50 wt % to 70 wt %, a third process for diluting and dispersing the primary diluted mixture K2 in an organic solvent to obtain a secondary diluted mixture K3 having a solid content within the range of 25 wt % to 50 wt %, and a fourth process for finely dispersing the secondary diluted mixture K3 to obtain a dispersion mixture K4 having a solid content within the range of 25 wt % to 45 wt %.
摘要翻译： 制备磁性涂料组合物的方法包括使用双轴连续捏和混合机捏合铁磁颗粒，粘合剂和粘合剂溶液Y1的第一种方法，以获得固体含量在以下范围内的捏合混合物K1： 65重量％〜95重量％，使用双轴连续捏和混合机捏合粘合剂溶液Y2和捏合混合物K1的第二工序，得到固体成分为50以下的一次稀释混合物K2 wt％至70wt％，第一种稀释混合物K2稀释并分散在有机溶剂中以获得固体含量在25wt％至50wt％范围内的二次稀释混合物K3的第三种方法，以及第四种方法 用于精细分散二次稀释混合物K3以获得固体含量在25重量％至45重量％范围内的分散体混合物K4。
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公开(公告)号：US4946615A
公开(公告)日：1990-08-07
申请号：US259655
申请日：1988-10-19
摘要： A method of preparing a kneaded mixture for a magnetic coating material comprises a kneading start process and a continuous kneading process. In the kneading start process, a low-viscosity composition, which is composed of magnetic layer forming materials containing ferromagnetic grains and a binder, and a solvent, is introduced into a kneading vessel of a two-shaft continuous kneading and mixing machine, and kneading is started. In the continuous kneading process, after the start of the kneading, a high-viscosity composition, in which a solvent amount is smaller by at least 7 wt % than the solvent amount in the low-viscosity composition used in the kneading start process, is continously introduced into the kneading vessel, and the kneading is continued while high shearing force is being given to the high-viscosity composition.
摘要翻译： 制备磁性涂料的捏合混合物的方法包括捏合开始过程和连续捏合过程。 在捏合开始过程中，将由含有铁磁性颗粒的磁性层形成材料和粘合剂构成的低粘度组合物和溶剂引入双轴连续捏和混合机的捏合容器中，并捏合 开始了 在连续捏合过程中，捏合开始后，与捏合开始过程中使用的低粘度组合物中的溶剂量相比，溶剂量小至少7重量％的高粘度组合物为 连续地引入捏合容器中，并且在对高粘度组合物施加高剪切力的同时继续捏合。
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公开(公告)号：US4503120A
公开(公告)日：1985-03-05
申请号：US505506
申请日：1983-06-17
IPC分类号： C08G18/42 , C09D5/23 , C09D127/00 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： C08G18/4202 , G11B5/7022 , Y10S428/90 , Y10T428/265 , Y10T428/31551 , Y10T428/31565 , Y10T428/31786 , Y10T428/31935
摘要： A magnetic recording medium which comprises a non-magnetic support having thereon a magnetic recording layer containing a ferromagnetic fine powder and a binder as main components is disclosed. The magnetic recording layer containing as the binder (1) a vinyl chloride-vinyl acetate-maleic acid copolymer which has a mean polymerization degree of about 300 to about 400 and a maleic acid fraction of about 0.6 to about 1.5 wt %, (2) a polyurethane resin which has a number average molecular weight of 40,000 to 100,000 and is prepared from (i) a mixture of polyneopentyladipate having a mean molecular weight of 500 to 2,500 and polybutyleneadipate having a mean molecular weight of 500 to 2,500 with a mixing ratio of the former to the latter of from 2/8 to 9/1 by weight and (ii) diphenylmethane diisocyanate, and optionally (3) a low molecular weight polyisocyanate compound.
摘要翻译： 公开了一种磁记录介质，其包括其上具有含有铁磁性细粉末和粘合剂作为主要成分的磁记录层的非磁性载体。 含有粘合剂（1）的氯乙烯 - 乙酸乙烯酯 - 马来酸共聚物的磁记录层，其平均聚合度为约300至约400，马来酸含量为约0.6至约1.5重量％，（2） 数均分子量为40,000〜100,000的聚氨酯树脂，其由（i）平均分子量为500〜2,500的聚己酸己烯酯和平均分子量为500〜2,500的聚己二酸丁二醇酯的混合物与（i） 前者为2/8至9/1重量比，（ii）二苯基甲烷二异氰酸酯和任选的（3）低分子量多异氰酸酯化合物。
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公开(公告)号：US5064687A
公开(公告)日：1991-11-12
申请号：US668821
申请日：1991-03-13
IPC分类号： G11B5/842
CPC分类号： G11B5/842
摘要： A method for making a magnetic recording medium comprises the steps of mixing ferromagnetic grains and a surface treating agent, grinding the resulting mixture, and thus obtaining a ground mixture. A binder and a solvent are added to the ground mixture, which results from the mixing and grinding process, the resulting mixture is kneaded and diluted, and a kneaded and diluted mixture is thus obtained. An additive and a solvent are then added to the kneaded and diluted mixture, which results from the kneading and diluting process, a dispersion process is carried out on the resulting mixture, and a dispersion mixture is thereby obtained. Thereafter the dispersion mixture, which results from the dispersion process, is applied to a non-magnetic substrate.
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