Claims
- 1. A process for preparing a copolymer having repeating units of the formula: ##STR11## wherein: R represents hydrogen, alkyl, aryl, substituted aryl, or an alicyclic hydrocarbon having from 1 to about 20 carbon atoms;
- each R.sup.1 independently represents hydrogen, chlorine, bromine, fluorine, cyano or a lower primary or secondary alkyl of 1-4 carbon atoms;
- each R.sup.2 independently represents hydrogen or alkyl having 1 to 4 carbon atoms;
- each R.sup.3 independently represents hydrogen, alkyl, or aryl having up to about 10 carbon atoms or when taken together represent a cyclic alkyl or arylene group having up to 20 carbon atoms; and
- the mole ratio of (a+c+d) : (b+e+f) is approximately equal to 1; e can be 0 to 49 mole percent; b and f taken independently can be 0 to 50 mole percent of the entire polymer provided that both b and f cannot simultaneously be zero which comprises:
- (A) contacting (i) a maleic anhydride reactant having up to 12 carbon atoms with (ii) a dioxolane reactant having the formula: ##STR12## wherein R.sup.2 and R.sup.3 are defined above; said contacting being in the presence of a free radical initiator, at a temperature within the range of from -10.degree. C. to about 180.degree. C; and
- (B) contacting the product of step (A) with a primary amine.
- 2. The process described in claim 1 wherein the product of step (B) is further contacted with an imide cyclizing agent or heated at a temperature of about 40 to 70.degree. C.
- 3. The process described in claim 1 wherein the free radical initiator is a peroxide or azobisisobutyronitrile.
- 4. The process described in claim 1 carried out in the presence of a non-polar solvent, an ester, ketone, aldehyde solvent, or in the absence of added solvent.
- 5. A process for preparing a copolymer having repeating units of the formula: ##STR13## wherein: R represents hydrogen, alkyl, aryl, substituted aryl, or an alicyclic hydrocarbon having from 1 to about 20 carbon atoms;
- each R.sup.1 independently represents hydrogen, chlorine, bromine, fluorine, cyano or a lower primary or secondary alkyl of 1-4 carbon atoms;
- each R.sup.2 independently represents hydrogen or alkyl having 1 to 4 carbon atoms;
- each R.sup.3 independently represents hydrogen, alkyl, or aryl having up to about 10 carbon atoms or when taken together represent a cyclic alkyl or arylene group having up to 20 carbon atoms; and
- the mole ratio of (a+c+d) : (b+e+f) is approximately equal to 1; e can be 0 to 49 mole percent; b and f taken independently can be 0 to 50 mole percent of the entire polymer provided that both b and f cannot simultaneously be zero, which comprises:
- (A) heating a ketone or aldehyde solution of (i) maleic anhydride and (ii) 3,4 -epoxy-1-butene;
- said process being conducted in the presence of a free radical initiator, at a temperature within the range of from 10.degree. C. to about 180.degree. C.; and
- (B) contacting the product of (A) with a primary amine.
- 6. The process described in claim 5 wherein the product of step (B) is cyclized chemically or thermally.
- 7. The process described in claim 5 wherein the free radical initiator is a peroxide or azobisisobutyronitrile
- 8. The process described in claim 5 wherein the primary amine is alkyl, aryl, or substituted alkyl.
Parent Case Info
This is a divisional application of copending application Ser. No. 08/185,331 filed Jan. 24, 1994, now U.S. Pat. No.5,418,294, division of Ser. No. 07/998,304 filed Dec. 30, 1992 now U.S. Pat. No. 5,304,611.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0724032 |
Feb 1955 |
GBX |
1223015 |
Feb 1971 |
GBX |
Non-Patent Literature Citations (3)
Entry |
A. Matsumoto, T. Kubota and T. Otsu, Macromolecules, 23, 4508-4513 (1990). |
B. M. Culbertson, Encyclopedia of Polymer Science and Engineering, vol. 9, 225-294 (1987). |
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Divisions (2)
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Number |
Date |
Country |
Parent |
185331 |
Jan 1994 |
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Parent |
998304 |
Dec 1992 |
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