Back to results
US 4,304,888 AGranted
Polymerization process
AssigneeThe Gillette Company
InventorsAnthony J. Calvert, Eric C. Collingwood
Life of this patent
Estimating the term…
Abstract
This application is concerned with improved processes for the preparation of polyvinyl imidazolines and polyvinyl tetrahydropyrimidines by reacting polyacrylonitriles with alkylene diamines in the presence of carbon dioxide.
Claims7
A process for preparing polyvinyl imidazolines and polyvinyl tetrahydropyrimidines having a major portion of repeating units of the formula:
- ##STR2## in which n is 0 or 1 and R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen or an alkyl group having up to 4 carbon atoms;
- said process comprising reacting polyacrylonitrile or a copolymer of a major proportion on a molar basis of acrylonitrile and a minor proportion of one or more monomers copolymerizable therewith, with an amine of the formula:
- R.sub.1 --NH--CHR.sub.2 --(CH.sub.2).sub.n --CHR.sub.3 --NH.sub.2
- in which n is 0 or 1 and R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen or an alkyl group having up to 4 carbon atoms, in the presence of carbon dioxide.
1 more element
Dependencies are inferred from the claim text.