Claims
- 1. A dihalo terminated precursor of the following formula:
- X--Ar.sub.3 --(Ar.sub.1 --O--Ar.sub.2 --CO).sub.n --Ar.sub.4 --X
- wherein X is halogen, Ar.sub.1 and Ar.sub.2 are divalent aromatic radials optionally containing solely an ether and/or a carbonyl function, Ar.sub.3 is Ar.sub.4 CO, Ar.sub.4 is 1,4 or 1,2 phenylene, and n is such that the molecular weight is below about 10,000.
- 2. A dihydroxy terminated precursor of the following formula: ##STR67## wherein Ar.sub.1 and Ar.sub.2 are divalent aromatic radicals optionally containing solely an ether and/or a carbonyl function and n is such that the molecular weight is below about 10,000.
- 3. A diacid halide terminated precursor of the following formula: ##STR68## wherein X is halogen, Ar.sub.1 and Ar.sub.2 are divalent aromatic radicals optionally containing solely an ether and/or a carbonyl function, Ar.sub.3 is Ar.sub.4 CO, Ar.sub.4 is 1,4 or 1,2 phenylene and n is such that the molecular weight is below about 10,000.
- 4. A diacid halide terminated precursor as defined in claim 3 of the following formula: ##STR69## wherein Ph is a phenyl or a 1,4 phenylene unit.
- 5. A diacid halide terminated precursor as defined in claim 3 of the following formula: ##STR70## wherein Ph is a phenyl or a 1,4 phenylene unit.
- 6. A precursor of the following formula: ##STR71## wherein X is halogen, Ar.sub.1 and Ar.sub.2 are divalent aromatic radicals optionally containing solely an ether and/or a carbonyl function, Ar.sub.3 is Ar.sub.4 CO, Ar.sub.4 is 1,4 or 1,2 phenylene and n is such that the molecular weight is below about 10,000.
- 7. A dihalo terminated precursor as defined in claim 1 of one of the following formula: ##STR72## wherein Ph is a phenyl or a 1,4 phenylene unit.
- 8. A dihydroxy terminated precursor as defined in claim 2 of one of the following formula: ##STR73## wherein Ph is a phenyl or a 1,4 phenylene unit.
- 9. A compound of the formula: ##STR74## wherein Ph is a phenyl or a 1,4-phenylene unit.
- 10. A compound of the formula: ##STR75## wherein Ph is a phenyl or a 1,4-phenylene unit.
- 11. A chain-extending compound of the following formula: ##STR76## wherein Ph is a phenyl or a 1,4-phenylene unit.
Parent Case Info
This is a division of application Ser. No. 729,580, filed 5/2/85, now U.S. Pat. No. 4,774,296.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2357415 |
Apr 1974 |
DEX |
1428404 |
Mar 1976 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
729580 |
May 1985 |
|