公开(公告)号：US4672104A

公开(公告)日：1987-06-09

申请号：US704227

申请日：1985-02-22

Applicant: Bennett C. Ward

Inventor： Bennett C. Ward

IPC: C08G73/18

CPC classification number: C08G73/18

Abstract: A two stage process for the production of polybenzimidazoles is provided wherein an aromatic tetraamine, e.g., 3,3',4,4'-tetraaminobiphenyl, is reacted with a dicarboxylic component consisting of at least one compound having the formula: ##STR1## in which R' is a divalent organic radical and may be the same or different in the various molecules making up the dicarboxylic component and the Y's may be the hydrogen, aryl or alkyl, with no more than 95% the Y's being hydrogen or phenyl. The reactants are heated with agitation in a first stage to a temperature above the melting point of the tetraamine until the viscosity of the mixture rises as indicated by an agitator torque of at least 1.5 times that before the rise in viscosity. The agitation is then discontinued and the reaction mixture is allowed to foam while heating is continued. The foam is then allowed to cool to a friable mass and is crushed to a ground prepolymer which is heated with agitation in a second stage until the desired polymer is obtained. The invention also includes certain benzimidazole polymers as new composition of matter.

Abstract translation: 提供了用于制备聚苯并咪唑的两阶段方法，其中将芳族四胺如3,3'，4,4'-四氨基联苯与由至少一种具有下式的化合物组成的二羧基成分进行反应： 其中R'是二价有机基团，并且在构成二羧基成分的各种分子中可以相同或不同，并且Y可以是氢，芳基或烷基，Y不超过95％是氢或苯基。 将反应物在第一阶段中搅拌加热到高于四胺的熔点的温度，直到混合物的粘度如搅拌器扭矩至少为粘度上升1.5倍以上所示那样升高。 然后停止搅拌，并继续加热，使反应混合物发泡。 然后使泡沫体冷却至易碎物质，并粉碎成研磨预聚物，在第二阶段中搅拌加热，直至得到所需的聚合物。 本发明还包括某些苯并咪唑聚合物作为物质的新组合物。