Claims
- 1. A composition comprising:
- a blend of two or more polyetherimides selected from the class consisting of ##STR12## where a represents a whole number in excess of 1, the group --O--A is selected from: ##STR13## R' being hydrogen, lower alkyl or lower alkoxy, Z is a member of the class consisting of (1) ##STR14## and (2) divalent organic radicals of the general formula: ##STR15## where X is a member selected from the class consisting of divalent radicals of the formulas, ##STR16## where q is 0 or 1, y is a whole number from 1 to 5, and R is a divalent organic radical selected from the class consisting of (1) aromatic hydrocarbon radicals having from 6-10 carbon atoms and halogenated derivatives thereof, (2) alkylene radicals and cycloalkylene radicals having from 2-20 carbon atoms, and C (2-8) alkylene terminated polydiorganisiloxane, and (3) divalent radicals included by the formula: ##STR17## where Q is a member selected from the class consisting of ##STR18## where x is a whole number from 1 to 5 inclusive; wherein the glass transition temperatures of the component polyetherimides are different and the glass transition temperature of the blend lies between those of the component polyetherimides.
- 2. A composition, comprising: a blend of two or more polyetherimides selected from the class consisting of: ##STR19## where Z is ##STR20## and R is selected from hexamethylene, ##STR21## wherein the glass transition temperatures of the component polyetherimides are different and the glass transition temperature of the blend lies between those of the component polyetherimides.
- 3. A composition in accordance with claim 2 containing a first polyetherimide where R is ##STR22##
- 4. A composition in accordance with claim 3 containing a second polyetherimide where R is hexamethylene.
- 5. A composition in accordance with claim 3 containing a second polyetherimide where R is ##STR23##
- 6. A composition in accordance with claim 1 comprising a first and second polyetherimides each formed by the reaction of aromatic bis(ether anhydrides) of the formula ##STR24## with one or more organic diamines of the formula
- H.sub.2 N--R--NH.sub.2
- 7. A composition in accordance with claim 6 wherein the bis ether anhydride of the first and second polyetherimide is of the formula ##STR25## the diamine of the first polyetherimide is ##STR26## and the diamine of the second polyetherimide is selected from one or more of hexamethylene diamine, ##STR27##
- 8. A composition in accordance with claim 7 where the diamine for the second polyetherimide is hexamethylene diamine and ##STR28##
- 9. A composition in accordance with claim 2 containing one or more fillers.
Parent Case Info
This is a continuation of application Ser. No. 364,904 filed Apr. 2, 1982 now abandoned.
US Referenced Citations (3)
Continuations (1)
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Number |
Date |
Country |
Parent |
364904 |
Apr 1982 |
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