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    • 88. 发明授权
    • Polystyrylpyridine resins having an increased toughness, and composite
materials comprising these resins
    • 具有增加的韧性的聚苯乙烯基吡啶树脂和包含这些树脂的复合材料
    • US4540770A
    • 1985-09-10
    • US643651
    • 1984-08-23
    • Sammy Chevallier
    • Sammy Chevallier
    • C08L61/00C08G16/00C08G16/02C08J5/24C08L61/34C08G12/02
    • C08J5/24C08G16/0268C08J2361/00
    • The present invention relates to polystyrylpyridine-type resins having increased toughness, and composite materials containing these resins.The resin of the invention contains a polycondensation product of at least two reactive methylated substituents, the said resin having the following general formula (I): U.sub.x V.sub.y W.sub.z in which: ##STR1## U denotes the grouping ##STR2## V denotes the grouping ##STR3## W denotes the grouping in which:R, R.sub.1 are identical or different and denote a chain segment consisting of hydrocarbon radicals and able to contain hetero atoms,A, A.sub.1 are identical or different and denote an atom or group forming a bridge between the segment R and an aromatic nucleus of the styrylpyridine chain, containing stereomobile bonds,R.sub.2 denotes hydrogen, or a methyl or ethyl radical, x, y, z denote integers that may be equal to 0, the sum y+z being at least equal to 1.Advantageously, A, A.sub.1 denotes an oxygen atom. The resins of the invention have better mechanical properties than conventional polystyrylpyridine (PSP) resins, particularly at ambient temperature, yet preserve the excellent thermostability and moisture resistance properties characteristic of PSP resins. This resin may be used as matrix in a laminate.
    • 本发明涉及韧性提高的聚苯乙烯基吡啶型树脂,以及包含这些树脂的复合材料。 本发明的树脂含有至少两个反应性甲基化取代基的缩聚产物,所述树脂具有以下通式(I):Ux Vy Wz,其中:U表示分组 V表示分组, 图像W表示其中:R,R 1相同或不同并且表示由烃基组成并能够含有杂原子的链段的分组,A,A1相同或不同,并且表示在原子或基团之间形成桥 段R和苯乙烯基吡啶链的芳香核,含有立体移动键,R2表示氢或甲基或乙基,x,y,z表示可等于0的整数,y + z之和至少等于 有利地,A,A1表示氧原子。 本发明的树脂具有比常规聚苯乙烯基吡啶(PSP)树脂更好的机械性能,特别是在环境温度下,同时保持了PSP树脂的优异的耐热性和耐湿性。 该树脂可以用作层压体中的基质。
    • 90. 发明授权
    • Thermosettable compositions convertible to vitreous carbon and process
for preparation thereof
    • 可转变成玻璃碳的可热熔组合物及其制备方法
    • US4526924A
    • 1985-07-02
    • US470978
    • 1983-03-01
    • Louis L. KorbPhillip A. Waitkus
    • Louis L. KorbPhillip A. Waitkus
    • C08K3/04C08L61/00C08L61/04C08L61/06C08L61/10
    • C08K3/04C08L61/06Y10S524/904
    • 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.
    • 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。