Abstract:
2079911 9115522 PCTABS00007 An uncrosslinked, water-soluble polyvinylpyrrolidone having a K-value in excess of 120 and containing less than about 0.1 percent by weight of residual monomer. A method for preparing the high molecular weight polyvinylpyrrolidone is also disclosed.
Abstract:
This invention relates to non-polymeric, asymmetrical, low freezing, high boiling, aliphatic compounds containing from 2 to 5 pyrrolidonyl rings and from 13 to 40 carbon atoms which melt below 0 .degree.C and which boil above 300 .degree.C at atmospheric pressure and to the synthesis and use of said liquid polypyrrolidonyl compounds.
Abstract:
This invention relates to non-polymeric, asymmetrical, low freezing, high boiling, aliphatic compounds containing from 2 to 5 pyrrolidonyl rings and from 13 to 40 carbon atoms which melt below 0 °C and which boil above 300 °C at atmospheric pressure and to the synthesis and use of said liquid polypyrrolidonyl compounds.
Abstract:
The invention is drawn to the field of polymer purification. Two separate embodiments are presented to remove residual monomer from the polymer product. The first embodiment is the treatment of polyvinylpyrrolidone having a Fitkenscher K value of 10-90, to a monomer content of