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    • 6. 发明授权
    • Process for the preparation of carbon fiber reinforced carbon composites
    • 碳纤维增强碳复合材料的制备工艺
    • US5695816A
    • 1997-12-09
    • US567766
    • 1995-12-05
    • Norio IwashitaYoshihiro Sawada
    • Norio IwashitaYoshihiro Sawada
    • C08J5/06B29C67/04B29K101/10B29K307/04C04B35/83D01F9/24D06M15/37D06M101/00D06M101/40B05D3/02
    • C04B35/83Y10T428/24314Y10T428/24669
    • The present invention aims at preventing or reducing the lowering in mechanical characteristics of a carbon fiber reinforced carbon composite due to stress orientation caused by the use of a thermosetting resin as a carbon matrix precursor resin to thereby obtain a carbon fiber reinforced carbon composite improved in mechanical characteristics, and for attaining this aim, provides a process for the preparation of a carbon fiber reinforced carbon composite which comprises impregnating a carbon fiber with a bismaleimide-triazine copolymer resin instead of the sizing agent and thermoplastic resin which have been used conventionally and heating the resulting impregnated carbon fiber in a non-oxidizing atmosphere to carbonize or graphitize the resin. Further, the present invention provides also a process for the preparation of a carbon fiber reinforced carbon composite which is characterized in that a bismaleimide-triazine copolymer resin is used as the sizing agent to be applied prior to the impregnation of a carbon fiber with a thermosetting agent to thereby prevent or reduce the lowering in mechanical characteristics due to stress orientation of the carbon matrix formed or derived from the conventional thermosetting resin.
    • 本发明旨在防止或减少由于使用热固性树脂作为碳基质前体树脂引起的应力取向引起的碳纤维增强碳复合材料的机械特性的降低,从而获得机械上改进的碳纤维增强碳复合材料 特征,并且为了达到这个目的,提供了一种制备碳纤维增强碳复合材料的方法,其包括用双马来酰亚胺 - 三嗪共聚物树脂浸渍碳纤维代替常规使用的上浆剂和热塑性树脂,并加热 得到的浸渍碳纤维在非氧化气氛中以碳化或石墨化树脂。 此外,本发明还提供了一种制备碳纤维增强碳复合材料的方法,其特征在于使用双马来酰亚胺 - 三嗪共聚物树脂作为在用热固性树脂浸渍碳纤维之前施加的施胶剂 从而防止或减少由于常规热固性树脂形成或衍生的碳基体的应力取向引起的机械特性的降低。
    • 8. 发明授权
    • Polycationic block copolymer
    • 聚阳离子嵌段共聚物
    • US4719282A
    • 1988-01-12
    • US855118
    • 1986-04-22
    • Richard J. NadolskyBharat B. Desai
    • Richard J. NadolskyBharat B. Desai
    • C11D1/62A61K8/90A61Q5/00A61Q5/12B01D21/01C02F1/54C02F1/56C08G73/02C08G81/00C11D3/37D06M15/37D06M15/564D06M15/59C08G69/00C08G69/02
    • A61K8/90A61Q5/02A61Q5/12C02F1/54C11D3/3703D06M15/564D06M15/59Y10T428/31504
    • Novel polycationic block copolymers useful as antistatic agents in detergent formulations and as flocculating agents are obtained by first forming a block of units by reacting a monomer of the formula II ##STR1## wherein each of R.sub.5, R.sub.6, R.sub.7 and R.sub.8 may be the same or different and is selected from the group consisting of C.sub.1-3 alkyl, C.sub.1-3 hydroxy alkyl and polyoxyalkylene,m is an integer from 0 to 34 andr and s are the same or different and are integers from 1 to 6,with a molar excess of a dihalide of the formulaHal--L--Halwherein Hal represents a halogen atom and L is selected from--CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --O--CH.sub.2 --, --(CH.sub.2).sub.t -- AND --CH.sub.2 CHOHCH.sub.2 --where t is an integer from 2 to 6 and thereafter reacting the product so formed with a compound of the formula III ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each individually selected from the group consisting of C.sub.1-3 alkyl, C.sub.1-3 hydroxyalkyl and polyoxyalkylne and p, and q are each individually integers of form 1 to 6 and, if necessary, in order to ensure a total molar ratio of compounds of Formula II and III to those of the formula Hal--L--Hal of 1:1 reacting the product with further compound of the formula Hal--L--Hal.
    • 通过首先通过使式II的单体(IMAGE)反应形成单元块来获得用作洗涤剂配制剂和絮凝剂中的抗静电剂的新型聚阳离子嵌段共聚物,其中R 5,R 6,R 7和R 8各自可以相同或 不同且选自C1-3烷基,C1-3羟基烷基和聚氧化烯,m是0至34的整数,r和s相同或不同,为1至6的整数,摩尔数 过量的式Hal-L-Hal的二卤化物,其中Hal表示卤素原子,L选自-CH 2 CH 2 -O-CH 2 CH 2 - , - CH 2 CH 2 -O-CH 2 CH 2 -O-CH 2 - , - (CH 2)t -OR -CH 2 CHOHCH 2 - 其中t是2至6的整数,然后使如此形成的产物与式III化合物反应,其中R 1,R 2,R 3和R 4各自独立地选自C 1-3烷基 ,C 1-3羟基烷基和聚氧烷基,p和q各自为1至6的整数,并且如果需要, 以确保式II和III的化合物与式Hal-L-Hal的化合物的总摩尔比为1:1,使产物与式Hal-L-Hal的另外的化合物反应。