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    • 6. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US4435485A
    • 1984-03-06
    • US295306
    • 1981-08-24
    • Kaoru NakajimaMasashi SomezawaMinoru TakamizawaYoshio InoueHiroshi Yoshioka
    • Kaoru NakajimaMasashi SomezawaMinoru TakamizawaYoshio InoueHiroshi Yoshioka
    • C08F2/00C08F2/46C08F2/48C08F2/54C08L33/00C08L33/04C09D4/00C09D5/23C09D175/14G11B5/702H01F10/02
    • G11B5/7026G11B5/7023Y10S428/90Y10T428/31786
    • The magnetic recording medium contains the magnetic layer comprising the magnetic or magnetizable powders or particles and the binder comprising a composition containing(A) a compound represented by formula (V): ##STR1## (wherein R is methyl or ethyl group and X is a group containing an acrylic or methacrylic double bond; i is a number in the range of approximately 200 to 800, j is a number in the range of approximately 10 to 200, k is a number in the range up to approximately 200, and l is a number in the range of approximately 3 to 100, provided that the division of l by the sum of k and l is in the range from approximately 0.2 to 1.0)and(B) a compound having at least two acrylic and/or methacrylic double bonds in the molecule thereof and having a molecular weight ranging from approximately 1,000 to 6,000 in which the molecular weight in the molecule per one double bond is in the range from approximately 80 to 3,000.The composition is cured by the irradiation of radiation so that the magnetic recording medium has an improved durability as well as physical strengths in the magnetic layer thereon.
    • 磁记录介质含有包含磁性或可磁化粉末或颗粒的磁性层,粘合剂包括含有(A)由式(V)表示的化合物的组合物:其中R是甲基或乙基,X是 基团为丙烯酸或甲基丙烯酸双键; i为约200〜800范围内的数,j为约10〜200的数,k为约200以下的数,l为 大约3至100范围内的数字,条件是除以k和l的总和除以约0.2至1.0)和(B)具有至少两个丙烯酸和/或甲基丙烯酸双酯的化合物 分子中的键,其分子量范围为约1,000至6,000,其中每个双键的分子中的分子量在约80至3,000的范围内。 组合物通过辐射照射而固化,使得磁记录介质在其上的磁性层中具有改善的耐久性以及物理强度。
    • 8. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US4368242A
    • 1983-01-11
    • US295390
    • 1981-08-24
    • Kaoru NakajimaMasashi SomezawaMinoru TakamizawaYoshio InoueHiroshi Yoshioka
    • Kaoru NakajimaMasashi SomezawaMinoru TakamizawaYoshio InoueHiroshi Yoshioka
    • C08F2/00C08F2/54C08L1/00C08L27/00C08L57/00C09D5/23G11B5/702H01F10/02
    • G11B5/7023G11B5/7026Y10S428/90Y10T428/31663Y10T428/31935
    • The magnetic recording medium according to the present invention contains the magnetic layer comprising the magnetic or magnetizable powders or particles and the binder wherein the binder compound is represented by the following general formula (I): ##STR1## (wherein R is methyl group or ethyl group, R.sub.1 is an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms or a phenyl group, R.sub.2 is an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, X is a group having a double bond, and Y is a group having a double bond, i is a number in the range of approximately 200 to 800, j is a number in the range of approximately 10 to 200, k is a number in the range up to approximately 200, l is a number in the range of approximately 3 to 100, and m is a number in the range of approximately 1 to 50). The compound is cured by the irradiation of radiation so that the magnetic recording medium has an improved durability and a superior resistance to chemicals as well as a good magnetic characteristics.
    • 根据本发明的磁记录介质包含包含磁性或可磁化粉末或颗粒的磁性层和粘合剂,其中粘合剂化合物由以下通式(I)表示:其中R是甲基或乙基 基团,R 1是具有1至4个碳原子的烷基,具有1至4个碳原子的烷氧基或苯基,R 2是具有1至4个碳原子的烷基,具有1至 4个碳原子,X是具有双键的基团,Y是具有双键的基团,i是大约200-800范围内的数,j是约10〜200的数,k 是在高达约200的范围内的数字,l是大约3至100范围内的数字,m是大约1至50范围内的数字)。 化合物通过辐射照射而固化,使得磁记录介质具有改善的耐久性和优异的耐化学性以及良好的磁特性。