Guide post for magnetic tapes
    2.
    发明授权
    Guide post for magnetic tapes 失效
    导磁柱用于磁带

    公开(公告)号:US4934577A

    公开(公告)日:1990-06-19

    申请号:US290687

    申请日:1988-12-27

    IPC分类号: G11B15/60 G11B23/50

    摘要: A guide post for magnetic tapes manufactured by injection molding of a composite material prepared by mixing a thermoplastic resin used as a basic ingredient with an electrically conductive carbon black and a spherical silicon resin. This guide post can exhibit characteristics equivalent to those of the metal guide post owing to the function of the electrically conductive carbon black and the spherical silicon resin. The composite material can further contain a solid lubricant mixed therewith.

    Method for stabilizing unsaturated cycloacetal resin
    4.
    发明授权
    Method for stabilizing unsaturated cycloacetal resin 失效
    用于稳定不饱和环己基树脂的方法

    公开(公告)号:US4081591A

    公开(公告)日:1978-03-28

    申请号:US694999

    申请日:1976-06-11

    摘要: This invention relates to a method for stabilizing unsaturated cycloacetal resin produced by reacting (I) cycloacetal compound prepared by the condensation of polyhydric alcohol more than tri-hydric and unsaturated aldehyde, with (II) unsaturated alcohol having a radical-polymerizable unsaturated bond and an alcoholic hydroxyl group in the same molecule, and optionally further with one or more compounds selected from the group consisting of polyhydric alcohol, hydroxy polyether and hydroxy polyester, in the presence of acid catalyst, characterized by adding one or more compounds selected from the group consisting of ammonia, primary amine, secondary amine, tertiary amine, quaternary ammonium salt, hydrazine and its derivatives in an amount of 0.01 to 5 parts by weight per 100 parts by weight of the produced unsaturated cycloacetal resin during the reaction of producing the unsaturated cycloacetal resin and/or after the reaction and maintaining pH of the unsaturated cycloacetal resin (pH of a 50% methyl alcohol solution of the resin) at more than 4.

    Curable resin composition
    6.
    发明授权
    Curable resin composition 失效
    可固化树脂组合物

    公开(公告)号:US4390662A

    公开(公告)日:1983-06-28

    申请号:US247564

    申请日:1981-03-25

    摘要: This invention relates to a curable resin composition suitable for use in the applications of casting material, coating material, putty, adhesives, various types of linings and FRP, said curable resin composition being characterized in that an unsaturated acrylic urethane prepared by addition reaction of a hydroxyl-terminated polymer, a polyisocyanate and a monohydroxylalkyl monoacrylate or a monohydroxylalkyl monomethacrylate, substantially free from an isocyanate group and having a weight-average extension of molecular chain of 100 A or more is added to at least one of an unsaturated polyester resin and an epoxy acrylate resin in an amount effective for the development of toughness, thus the toughness of the conventional unsaturated polyester or epoxyacrylate ester being improved by admixing said unsaturated acrylic urethane therewith.

    摘要翻译: PCT No.PCT / JP80 / 00274 Sec。 371日期1981年3月25日 102(e)1981年3月25日PCT PCT。 出版物WO81 / 01292 日本公开日1981年5月14日。本发明涉及一种适用于铸造材料,涂料,油灰,粘合剂,各种衬里和FRP用途的固化性树脂组合物,所述固化性树脂组合物的特征在于,不饱和丙烯酸聚氨酯 通过羟基封端的聚合物,多异氰酸酯和单羟基烷基单丙烯酸酯或单羟基烷基单甲基丙烯酸酯的基本上不含异氰酸酯基并且分子链的重均分子量为100A或更大的加成反应制备, 不饱和聚酯树脂和环氧丙烯酸酯树脂,其用量可以有效地发挥韧性,因此常规的不饱和聚酯或环氧丙烯酸酯的韧性通过将所述不饱和丙烯酸聚氨酯与其混合而改善。

    Curable resinous composition
    7.
    发明授权
    Curable resinous composition 失效
    可固化的树脂组合物

    公开(公告)号:US3993663A

    公开(公告)日:1976-11-23

    申请号:US536914

    申请日:1974-12-27

    CPC分类号: C07D493/10 C08F20/28 C08G4/00

    摘要: This invention relates to a curable resinous composition prepared by reacting 1 mol of (a) an unsaturated polycycloacetal, 0.1 to 3 mols of (b) an ester of polyhydric alcohol/unsaturated monocarboxylic acid, having an alcoholic hydroxyl group and a polymerizable unsaturated bond selected from the group of acryl and methacryl groups in the same molecule, and 0.1 to 2.9 mols (per hydroxyl group in component b) of (c) a polyhydroxy compound.

    摘要翻译: 本发明涉及一种可固化树脂组合物,其通过使1mol(a)不饱和多环缩醛,0.1至3mol(b)具有醇羟基和可聚合不饱和键的多元醇/不饱和一元羧酸酯选择 来自相同分子中的丙烯酸酯基和甲基丙烯酰基的基团,和(c)多羟基化合物的0.1至2.9摩尔(组分b中的每个羟基)。