摘要:
A process for producing continuously an aromatic polycarbonate oligomer by reacting an aromatic dihydroxy compound and an alkali metal base or an alkaline earth metal base with a carbonyl halide compound comprises: (1) feeding continuously to a tank reactor an aromatic dihydroxy compound, water, a molecular weight controlling agent, a polymerization catalyst, a carbonyl halide compound, and an organic solvent, and an alkali metal base or an alkaline earth metal base in an amount of 1.15 - 1.6 equivalents based on the aromatic dihydroxy compound, (2) carrying out the reaction with a residence time as defined by the following formula, log Y (0.0005 ≦ X where X is an amount of the polymerization catalyst in terms of mole % based on the amount of mole of the aromatic dihydroxy compound fed per unit time, and Y is a residence time (min.), and (3) continuously withdrawing the reaction mixture from the tank reactor to obtain an aromatic polycarbonate oligomer having a number average molecular weight of 1,000 - 10,000. An aromatic polycarbonate is produced by polycondensation of the aromatic polycarbonate oligomer.
摘要:
1. A thermosetting resin composition which comprises a bismaleimide derivative having the formula (I) : and a diamine derivative having the formula (II) : wherein R 3 is a divalent radical represented by or where X is selected from a bond, a divalent hydrocarbon radical having 2 carbon atoms, hexafluorinated isopropylidene radical, carbonyl radical, thio radical and sulfinyl radical. A thermosetting resin prepolymer may be obtained by conducting heat-treatment of the thermosetting resin composition at a temperature of 70 to 220°C in the presence or absence of a solvent.
摘要:
Disclosed is a composition for forming a thermosetting resin having excellent impact resistance and toughness. The composition comprises a bismaleimide compound represented by formula (I):
wherein R is a hydrogen atom or methyl, and an amine compound represented by formula (II):
wherein X is a radical selected from the group of divalent hydrocarbons having from 1 to 10 carbon atoms, hexafluorinated isopropylidene, carbonyl, thio, sulfinyl, sulfonyl, oxo,
O-, or by formula (III)):
wherein n is an integer of 0 to 50. Also disclosed is a process for preparing the composition.