| 摘要 |
A polyetherimide composition comprising a polyetherimide manufactured by reaction of an alkali metal salt of a dihydroxy aromatic compound with a bis(halophthalimide) composition comprising, based on the weight of the bis(halophthalimide) composition, at least 15 wt. % of a 3,3′-bis(halophthalimide) of the formula;;from more than 17 wt. % to less than 85 wt. % of a 4,3′-bis(halophthalimide) of the formula;;and
from more than 0 to less than 27 wt. % of a 4,4′-bis(halophthalimide) of the formula
; |
| 主权项 |
1. A polymer composition comprising a polyetherimide having the formula wherein n is greater than 1, each R is the same or different, and is selected from an aromatic hydrocarbon group having 6 to 30 carbon atoms, a halogenated derivative thereof, a straight or branched chain alkylene group having 2 to 10 carbon atoms, a cycloalkylene group having 3 to 10 carbon atoms, or a divalent group of the formula wherein Q1 is selected from —O—, —S—, —C(O)—, —SO2—, —SO—, and —CyH2y— wherein y is 1 to 5 and a halogenated derivative thereof, each Z is the same or different, and is an aromatic C6-24 monocyclic or polycyclic moiety optionally substituted with 1 to 6 C1-18 alkyl groups, 1 to 8 halogen atoms, or a combination thereof, and the divalent bonds between the —O—Z—O— group and the phenyl substituents are in the 3,3′, 3,4′, 4,3′, and 4,4′ positions, the divalent bonds of the —O—Z—O— group being made from a bis(halophthalimide) composition comprising, based on the weight of the bis(halophthalimide) composition,
at least 15 wt. % of a 3,3′-bis(halophthalimide) of the formula from more than 17 wt. % to less than 85 wt. % of a 4,3′-bis(halophthalimide) of the formula and from more than 0 to less than 27 wt. % of a 4,4′-bis(halophthalimide) of the formula wherein each X is independently fluoro, chloro, bromo, or iodo and R is as defined above,the polyetherimide being a catalyzed polymerization reaction product of the bis(halophthalimide) composition and a 1.6 to 2.0 mole % excess of an alkali metal salt of a dihydroxy aromatic compound of the formula
MO—Z-OM wherein M is an alkali metal, and Z is as defined above,
in the presence of from 2 to 4 mole % of an endcapping agent, and wherein the polyetherimide has:
a Tg above 220° C.;20 wt. % to 35 wt. % solids;an Mw of at least 42,000 Daltons;a maximum chloride content of less than 900 ppm by weight;a maximum of 700 ppm by weight OH endgroup polymer functionality; and the low shear viscosity of the polyetherimide is at least 30% lower than a polyetherimide made from a bis(halophthalimide) composition comprising less than 10 wt. % of the 4,3′-bis(halophthalimide). |
