Claims
- 1. A copolymerization process which comprises 1,2- and 1,5-propagation of a butadiene monoepoxide reactant having up to about 12 carbon atoms, and 3,4-propagation of a maleic anhydride reactant having up to about 12 carbon atoms; said process comprising contacting said reactants in the presence of a free radical initiating amount of a free radical initiator, at a temperature at from about -10.degree. C. to about 180.degree. C. and in a reaction solvent selected from ethers and ketones, thereby forming a copolymer product soluble in such solvent.
- 2. A process for the preparation of a copolymer which (a) is soluble in an organic solvent, and (b) which has the following three repeating units: ##STR16## wherein w and x are each individually equal to at least about 0.05 to about 0.95, and the sum of w+x is equal to or substantially equal to 1 and z is equal to or substantially equal to 1;
- said process comprising heating an ether solution of maleic anhydride and 3,4-epoxy-1-butene in the presence of a free radical initiator to a temperature of from about -10.degree. C. to about 180.degree. C., for a time sufficient to form said soluble copolymer product.
- 3. A process for the preparation of a copolymer which (a) is soluble in an organic solvent, and (b) which has the following four repeating units: ##STR17## wherein w, x, and y are each individually equal to at least about 0.05 to about 0.95, and the sum of (w+x+y) is equal or substantially equal to 1, and z is equal to or substantially equal to 1;
- said process comprising heating a ketone solution of a maleic anhydride reactant and a 3,4-epoxy-1-butene reactant each having up to about 12 carbon atoms, in the presence of a free radical initiator to a temperature of from about -10.degree. C. to about 180.degree. C., for a time sufficient to form said soluble copolymer product; said ketone having the formula: ##STR18## wherein each R.sup.1 is an alkyl or aryl radical having up to about 10 carbon atoms, or when taken together is a 1,1 cycloalkylidene radical having up to about 20 carbon atoms.
CROSS REFERENCE APPLICATION
This application is a division of application Ser. No. 498,183, filed Mar. 23, 1990 now U.S. Pat. No. 5,013,806.
US Referenced Citations (9)
Non-Patent Literature Citations (3)
Entry |
N. Kaishi and N. Masato, Kobunshi Kagaku, 24, 272 (1967). |
G. B. Butler et al., J. Macromol Sci: Chem. A5 (1) 219 (1971). |
T. Sargusa Angew. Chemie, IE, 16, 826 (1977). |
Divisions (1)
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Number |
Date |
Country |
Parent |
498183 |
Mar 1990 |
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