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18 条记录 (耗时 0.02 秒)

    Process for producing a modified styrene polymer
    2.
    发明授权
    Process for producing a modified styrene polymer 失效
    制备改性苯乙烯聚合物的方法

    公开(公告)号：US4912170A

    公开(公告)日：1990-03-27

    申请号：US288981

    申请日：1988-12-22

    申请人： Tadashi Niwa ,  Masayuki Kato ,  Yoshio Taguchi ,  Chihiro Imai ,  Tokuo Makishima, deceased ,  by Nobuko Makishima, legal representative

    发明人： Tadashi Niwa ,  Masayuki Kato ,  Yoshio Taguchi ,  Chihiro Imai ,  Tokuo Makishima, deceased ,  by Nobuko Makishima, legal representative

    IPC分类号： C08F8/42 ,  C08F8/00

    CPC分类号： C08F8/00

    摘要： This invention relates to a p-methyl styrene polymer represented by the following formula: ##STR1## Z denotes a group such as a functional group. Poly p-methylstyrene (PPMS) is lithiated by reaction with n-butyllithium. The lithiated PPMS is used to prepare polymers containing functional groups. As an example, a solution of PPMS (MW 260,000), 1.0 g in 20 ml of cyclohexane, was reacted with n-butyllithium, 8.5 mmol, and tetramethylethylenediamine, 8.7 mmol, for 20 hours to obtain a precipitate. The precipitate was dissolved in THF, and CO.sub.2 was blown into the solution. The solution was washed with an aqueous solution of HCl and dropped into methanol to obtain a solid polymer having carboxyl group functionality.

    摘要翻译： 本发明涉及由下式表示的对甲基苯乙烯聚合物：＆lt; IMAGE＆gt; Z表示官能团等基团。 聚对甲基苯乙烯（PPMS）通过与正丁基锂反应而锂化。 锂化PPMS用于制备含有官能团的聚合物。 作为一个例子，将PPMS（MW 260,000），1.0g在20ml环己烷中的溶液与正丁基锂8.5mmol和四甲基乙二胺8.7mmol反应20小时，得到沉淀。 将沉淀物溶解在THF中，并将CO 2吹入溶液中。 溶液用HCl水溶液洗涤，滴入甲醇中，得到具有羧基官能团的固体聚合物。

    Novel styrene copolymer
    8.
    发明授权
    Novel styrene copolymer 失效
    新型苯乙烯共聚物

    公开(公告)号：US4704438A

    公开(公告)日：1987-11-03

    申请号：US35022

    申请日：1987-04-06

    申请人： Tadashi Niwa ,  Masayuki Kato ,  Yoshio Taguchi ,  Chihiro Imai

    发明人： Tadashi Niwa ,  Masayuki Kato ,  Yoshio Taguchi ,  Chihiro Imai

    IPC分类号： C08F8/42 ,  C08F212/12 ,  C08F8/00

    CPC分类号： C08F8/42

    摘要： A novel styrene copolymer having a functional group, i.e. silyl group on the para-position of the aromatic ring, useful as a functional polymer, is provided. An effective process for the production thereof comprises contacting a random or block copolymer of p-methylstyrene and .alpha.-methylstyrene with an organolithium compound to lithiate partly the p-methyl group in the copolymer and then reacting the lithiated copolymer with a silicon compound represented by the general formula (R.sup.1)(R.sup.2)(R.sup.3)SiX wherein R.sup.1, R.sup.2 and R.sup.3 are, same or different, alkyl groups with 1 to 6 carbon atoms or alkenyl groups with 2 to 6 carbon atoms, at least one of R.sup.1, R.sup.2 and R.sup.3 being an alkenyl group, and X is a halogen atom.

    摘要翻译： 提供了一种具有官能团的新型苯乙烯共聚物，即芳族环对位上的甲硅烷基，可用作官能聚合物。 一种有效的制备方法包括使对甲基苯乙烯和α-甲基苯乙烯的无规或嵌段共聚物与有机锂化合物接触，使共聚物中的对甲基部分地锂化，然后使锂化共聚物与由 通式（R1）（R2）（R3）SiX其中R1，R2和R3相同或不同，具有1至6个碳原子的烷基或具有2至6个碳原子的链烯基，R1，R2和 R3是烯基，X是卤素原子。