| 摘要 |
A process for the polymerization of polymers of itaconic acid and vinyl acetate comprising the step of polymerizing (i) from 10 to 95 mole percent of monomer units of the formula I: <CHEM> wherein each of R1 and R2, which may be the same or different, represents a hydrogen atom, a methyl group or an ethyl group, and M is a hydrogen atom or an alkyl (C1 to C18) chain or an organic group such as an amino containing functionality; (ii) from 5 to 90 mole percent of monomer units of the formula II: <CHEM> wherein R3 represents a hydrogen atom or the group -COCH3; and (iii) from 0 to 45 mole percent of a ethylenically unsaturated copolymerizable comonomer, said polymerization being carried out using semi-batch polymerization procedures at a temperature of 60 to 200 DEG c in the presence of a substantially anhydrous alcoholic solvent. |
