Resin coated sand for casting
    57.
    发明授权
    Resin coated sand for casting 失效
    树脂涂层砂铸造

    公开(公告)号:US4529751A

    公开(公告)日:1985-07-16

    申请号:US542914

    申请日:1983-10-17

    Applicant: Yukio Saeki

    Inventor: Yukio Saeki

    CPC classification number: B22C1/2253 C08G8/04 C08L61/06 Y10T428/2993

    Abstract: A phenolic resin for application in foundry shell molding operations having improved properties is disclosed. The phenolic resin is prepared by reacting aldehydes and a mixture of bisphenol A and bisphenol F to prepare a phenolic resin for coating foundry aggregates or sand to prepare shell molds having low thermal expansion and improved shake out properties.

    Abstract translation: 公开了一种用于具有改进性能的铸造壳成型操作中的酚醛树脂。 酚醛树脂通过使醛和双酚A和双酚F的混合物反应来制备用于涂覆铸造聚集体或砂的酚醛树脂以制备具有低热膨胀和改善的摇摆性能的壳模。

    Thermosettable compositions convertible to vitreous carbon and process
for preparation thereof
    58.
    发明授权
    Thermosettable compositions convertible to vitreous carbon and process for preparation thereof 失效
    可转变成玻璃碳的可热熔组合物及其制备方法

    公开(公告)号:US4526924A

    公开(公告)日:1985-07-02

    申请号:US470978

    申请日:1983-03-01

    CPC classification number: C08K3/04 C08L61/06 Y10S524/904

    Abstract: The compositions disclosed herein are suitable for thermosetting and conversion to vitreous carbon. They comprise intimate uniform mixtures of powder or otherwise blendable form of 20-80% by weight of a solid phenolic-aldehyde Novolak resin and of 20-80% by weight of a solid phenolic-aldehyde resol resin, the percentages being based on the combined weight of the Novolak and resol resins, and the aldehyde in said Novolak resin comprising at least 50 molar percent, preferably substantially 100 percent, furfuraldehyde, together with a carbonaceous filler, preferably graphite, in a proportion as high as 76% by weight based on the total composition. Generally the graphite may comprise 30-70%, advantageously 35-65% and preferably 40-60% of the molding composition. The vitreous carbon produced from these compositions have improved properties in electrical properties and in the capability of being suitably molded and carburized into large thin plates which are much more stress-free than otherwise produced. The composition may also contain 0-12 parts, preferably 0.12-8 parts hexamethylenetetramine per 100 parts of Novolak resin. The intimate mixture of these resins is advantageously made by blending resin components having a particle size of less than 40 mesh, preferably less than 100 mesh.

    Abstract translation: 本文公开的组合物适用于热固化和转化为玻璃碳。 它们包括20-80重量%固体酚醛酚醛清漆树脂和20-80重量%固体酚醛树脂树脂的粉末或其它可混合形式的均匀混合物,百分比基于组合 酚醛清漆树脂和甲阶酚醛树脂的重量,所述酚醛清漆树脂中的醛包含至少50摩尔%,优选基本上100%的糠醛,以及碳质填料,优选石墨,其比例高达76重量%,基于 总组成。 通常,石墨可以包含模制组合物的30-70%,有利地35-65%,优选40-60%。 由这些组合物生产的玻璃碳具有改善的电性能,以及适当地模塑和渗碳成与其它方法相比无压力的大的薄板的能力。 组合物还可以含有每100份酚醛清漆树脂0-12份,优选0.12-8份六亚甲基四胺。 这些树脂的紧密混合物有利地通过混合具有小于40目,优选小于100目的粒度的树脂组分来制备。

    Thermoplastic composition containing a poly(methyl ethenyl benzene)
resin and a poly(phenylene oxide) resin
    59.
    发明授权
    Thermoplastic composition containing a poly(methyl ethenyl benzene) resin and a poly(phenylene oxide) resin 失效
    含有聚(甲基乙烯基苯)树脂​​和聚(苯醚)树脂的热塑性组合物

    公开(公告)号:US4480073A

    公开(公告)日:1984-10-30

    申请号:US282627

    申请日:1981-07-13

    Inventor: Robert V. Russo

    CPC classification number: C08L25/16 C08L51/04 C08L71/123 C08L71/12

    Abstract: Thermoplastic blends having superior capability and homogeneity comprising a poly(phenylene oxide) resin and a resin of poly(methyl ethenyl benzene) isomers in which the predominant isomer is 1-methyl-4-ethenyl benzene, are disclosed. The poly(phenylene oxide) resin can contain substituted phenylene units and the poly(methyl ethenyl benzene) resin can be a polymer of solely methyl ethenyl benzene isomers, or a random, block or graft copolymer comprising 50 weight percent or more of methyl ethenyl benzene iosmers and up to 50 weight percent of other ethylenically unsaturated monomers.

    Abstract translation: 公开了具有优异的能力和均匀性的热塑性共混物,其包含聚(苯醚)树脂和其中主要异构体为1-甲基-4-乙烯基苯的聚(甲基乙烯基苯)异构体的树脂。 聚(苯醚)树脂可以含有取代的亚苯基单元,聚(甲基乙烯基苯)树脂​​可以是单独甲基乙烯基苯异构体的聚合物,或包含50重量%或更多的甲基乙烯基苯的无规嵌段或接枝共聚物 iosmers和高达50重量%的其他烯属不饱和单体。

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