초록 ▼

Novel block copolymers containing polyetherimide and polycarbonate segments are prepared from hydroxy terminated polyetherimide oligomers, a dihydric phenol and phosgene or a phosgene precursor. The segmented block copolymers exhibit improved toughness and are useful as engineering thermoplastics, a

Novel block copolymers containing polyetherimide and polycarbonate segments are prepared from hydroxy terminated polyetherimide oligomers, a dihydric phenol and phosgene or a phosgene precursor. The segmented block copolymers exhibit improved toughness and are useful as engineering thermoplastics, alone, or in combination with other resins.

대표청구항 ▼

A poly(etherimide carbonate) having a mean weight average molecular weight Mw of between about 15,000 and 40,000 and being of the general formula (I) comprising: (a) from about 5 to 80% by weight of polyetherimide segments (A) with mean number-average molecular weight Mn of between 1,000 and 6000; a

A poly(etherimide carbonate) having a mean weight average molecular weight Mw of between about 15,000 and 40,000 and being of the general formula (I) comprising: (a) from about 5 to 80% by weight of polyetherimide segments (A) with mean number-average molecular weight Mn of between 1,000 and 6000; and (b) polycarbonate segments B: [Figure] (I) [Figure] [Figure] wherein, the －O－T3 being hydrogen, lower alkyl or lower alkoxy; and Z is: [Figure] (1) [Figure] [Figure] or a (2) divalent organic radical of the general formula: [Figure] where Y is a divalent radical of the formulae: [Figure] where q is 0 or 1, y is a whole number from 1 to 5; and R is a divalent organic radical selected from (1) an aromatic hydrocarbon radical having from 6-20 carbon atoms and halogenated derivatives thereof, (2) an alkylene radical or a cycloalkylene radical having from 2-20 carbon atoms, a C(2-8) alkylene terminated polydiorganosiloxane, and (3) a divalent radical of the formula: [Figure] where Q is [Figure] where x is a whole number from 1 to 5 inclusive; and R1 is as defined for R above; and X is a bond or C1-C8 alkylene, C2-C8 alkylidene, C5-C15 cycloalkylene, C5-C15 cycloalkylidene, SO2, SO, O, CO or [Figure] R2 denotes hydrogen, chlorine, bromine or alkyl of 1 to 3 carbon atoms; n is an integer of from about 3 to about 12 and m is 1 or 2.