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    • 1. 发明授权
    • Process for the formation and recovery of
poly(bisbenzimidazoenzophenanthroline)
    • 聚(双苯并咪唑并苯并菲菲)的形成和回收方法
    • US4005058A
    • 1977-01-25
    • US655339
    • 1976-02-05
    • Edward C. CheneveyHarry T. Hanson
    • Edward C. CheneveyHarry T. Hanson
    • C08G73/20C08G20/00C08G20/20C08G20/32C08G33/02
    • C08G73/20
    • An improved overall process is provided wherein poly(bisbenzimidazobenzophenanthroline) is formed on an expeditious basis and is recovered from the reaction mass in substantially pure form. Appropriate quantities of 1,4,5,8-tetracarboxy naphthalene dianhydride and 3,3',4,4' -tetraaminobiphenyl are condensed as defined) in a reaction zone while dissolved in molten antimony trichloride, and the resulting reaction mass containing the dissolved product is discharged into a precipitation zone containing hydrochloric acid (as defined). The resulting solid product is separated and dried. The liquid portion which is separated from the solid product contains antimony trichloride dissolved in hydrochloric acid and is subjected to distillation which substantially separates these components. The antimony trichloride is recycled to the reaction zone, and the hydrochloric acid is recycled to the precipitation zone.
    • 提供了一种改进的总体方法,其中快速形成聚(双苯并咪唑基苯并菲罗啉),并以基本上纯的形式从反应物质中回收。 合适量的1,4,5,8-四羧基萘二酐和3,3',4,4'-四氨基联苯在反应区中缩合,同时溶解在熔融的三氯化锑中,所得反应物质含有溶解的 将产物排入含有盐酸的沉淀区(定义)。 将所得固体产物分离并干燥。 与固体产物分离的液体部分含有溶解在盐酸中的三氯化锑,并进行基本分离这些组分的蒸馏。 将三氯化锑再循环至反应区,将盐酸再循环至沉淀区。
    • 2. 发明授权
    • Production of thermosetting resinous polyepoxides
    • 生产热固性树脂多羟基氧化物
    • US4105634A
    • 1978-08-08
    • US713622
    • 1976-08-11
    • Harry T. HansonMarvin Gordon
    • Harry T. HansonMarvin Gordon
    • C08G59/06C08G59/02
    • C08G59/066
    • In one aspect, thermosetting liquid resinous polyepoxides are upgraded or advanced in molecular weight by a process including (A) providing a catalyst-free mixture of a dihydric phenol, preferably bisphenol-A and a liquid resinous polyepoxide containing 1,2-epoxy groups, preferably a low molecular weight epoxy resin consisting essentially of the diglycidyl ether of bisphenol-A, at a temperature above about a minimum reaction temperature for a catalytic liquid upgrade reaction between the dihydric phenol and the polyepoxide; and (B) subsequently introducing the catlyst, preferably an organic phosphine and most preferably triphenylphosphine, into the mixture of the dihydric phenol and polyepoxide at reaction temperature and maintaining the mixture containing the catalyst at reaction temperature for a time sufficient to produce the upgraded version of the thermosetting resinous polyepoxide. In another aspect, multiple catalyst additions are featured wherein, for example, after a first catalytic amount of a catalyst is introduced into the mixture of dihydric phenol and polyepoxide and the reaction has been maintained for a first period of time, a second catalytic amount of the catalyst is introduced into the mixture while at reaction temperature to upgrade further the polyepoxide. In yet another aspect of the disclosure, thermosetting resinous polyepoxides of improved molecular weight distribution are obtained by a process, preferably a continuous process, which involves (A) providing a catalyst-free mixture of bisphenol-A and a liquid resinous polyepoxide consisting essentially of an aromatic polyepoxide of the structural formula: ##STR1## to a temperature between 120.degree. C. and about 200.degree. C.; and (B) subsequently introducing triphenylphosphine into the mixture of the dihydric phenol and aromatic polyepoxide at a reaction temperature above 120.degree. C. and maintaining the mixture containing the catalyst at reaction temperature for a time between about 5 and about 30 minutes.