Copolymers of vinyl dioxolanes and maleimides
AssigneeEastman Chemical Company
InventorsRichard W. Blevins, S. Richard Turner
Life of this patent
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Abstract
Copolymers are produced when a 4-vinyl-1,3-dioxolane monomer is copolymerized with an imidized maleic anhydride (for example, maleimide) monomer in the presence of a free radical initiator. Alternatively, a maleamic acid or maleimide functionality may be introduced into a copolymer containing a 4-vinyl-1,3-dioxolane and maleic anhydride by introducing a primary amine into the reaction mixture. Also, the dioxolane reactant may be introduced into the polymer by reacting 3,4-epoxy-1-butene in a ketone reaction solvent. The structure and composition of the product copolymer are controlled by both the sequence and conditions of the reaction. Products of this invention can be cast as clear films and can also be used as reactive polymers.
Claims8
A copolymer comprising polymerized repeating monomeric units of (a) a maleimide reactant and (b) a 4-vinyl-1,3-dioxolane reactant.
A copolymer having repeating units of the general formula ##STR5## 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 to 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 alkylene or arylene group having up to 20 carbon atoms;
- and
- a is equal to about 0.1 to about 50 mole per cent and b is equal to about 50 to about 99.9 mole per cent of the entire copolymer.
Dependencies are inferred from the claim text.