Claims
- 1. A process for preparing a crystalline polyarylntrile polymer having repeating units of the following formula: ##STR10## where A is independently selected from hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and halogen, a is an integer of 1 or 2 and b is an integer of 1 to 3 and wherein the polyarylnitrile polymer has a reduced viscosity of at least 0.3 dl/g as measured in p-chlorophenol at 50.degree. C., which comprises the following step:
- (a) reacting substantially equimolar amounts of a dihydroxy compound of the formula: ##STR11## wherein A and b are as defined above with a substantially equimolar amount of a benzonitrile compound of the formula: ##STR12## wherein as is defined as above and the X's are independently selected from Cl, F, Br or NO.sub.2, and an alkali metal carbonate in a solvent mixture comprising a solvent which forms an azeotrope with water and a dipolar aprotic solvent at a temperature less than 200.degree. C., while continuously removing water from the reaction mass as an azeotrope with an azeotrope forming solvent to maintain the reaction at substantially anhydrous conditions to form an oligomer;
- (b) heating said oligomer at a temperature greater than 200.degree. C. for a period of time sufficient to form a polyarylnitrile polymer having a reduced viscosity of greater than about 0.3 dl/gm.
- 2. A process as defined in claim 1 wherein the dihydroxy compound is of the formula: ##STR13##
- 3. A process as defined in claim 1 wherein the the dihydroxy compound is of the formula: ##STR14##
- 4. A process as defined in claim 1 wherein the benzontrile is of the following formula: ##STR15##
Parent Case Info
This application is a continuation of prior U.S. Application Ser. No. 480,737 filed Mar. 31, 1983, now abandoned.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
3591558 |
Brown et al. |
Jul 1971 |
|
3730946 |
Heath et al. |
May 1973 |
|
4042567 |
Sundermann |
Aug 1977 |
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4049630 |
Sundermann et al. |
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4108837 |
Johnson et al. |
Aug 1978 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
480737 |
Mar 1983 |
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