| 摘要 |
Heterocyclic N-vinyl monomers are simultaneously polymerized and alkylated by heating one mole of a heterocyclic N-vinyl monomer, or one mole of a mixture of two such monomers, or one mole of a mixture of monomers containing from 5 to 99% by weight of a heterocyclic N-vinyl monomer and from 1 to 95% by weight of a non-heterocyclic polymerizable mono-ethylenically unsaturated monomer with 0.05 to 12 moles of an a -olefin chosen from chlorofluoro-a -olefins and fluoro-a -olefins both containing 2 carbon atoms and an a -olefin containing at least 2 carbon atoms in an organic solvent common to all the above monomers and the said a -olefins in the presence of 0.025 to 0.30 mole of an organic peroxide catalyst per mole of the said a -olefin at a temperature ranging from 80 DEG to 200 DEG C. The invention also provides a copolymer of two different heterocyclic N-vinyl lactams, in which some or all of the rings contain one or more alkyl groups of at least two carbon atoms. N-vinyl heterocyclic monomers exemplified include pyrrolidines, piperdines, caprolactams, oxazolidines, morpholinones and succinimides. Non-heterocyclic monomers exemplified are vinyl acetate, ethyl acrylate and dimethylaminoethyl methacrylate.
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