Hydrophobic Crosslinkable Acetoacetylated Lactam/Vinyl Alcohol Copolymers

Abstract

This invention relates to lactam/vinyl alcohol copolymers, and more specifically, to hydrophobic cross-linkable acetoacetylated lactam/vinyl alcohol copolymers suitable for use in a variety of applications including printing, inks, membranes, coatings, adhesives, oil treatment chemicals (such as gas and kinetic hydrate inhibitors), and fiber/textile treatments.

1 . A hydrophobic, crosslinkable acetoacetylated lactam/vinyl alcohol copolymer. 
   
   
       2 . The copolymer of  claim 1  in which said lactam is vinyl pyrrolidone or vinyl caprolactam. 
   
   
       3 . The copolymer of  claim 2  which is made by partially hydrolyzing a polyvinylpyrrolidone/vinyl acetate copolymer to produce a poly(vinylpyrrolidone/vinyl alcohol) copolymer and then acetoacetylating said copolymer with a diketene to obtain said desired copolymer. 
   
   
       4 . The copolymer of  claim 3  wherein said poly vinylpyrrolidone/vinyl alcohol is partially hydrolyzed to a degree of at least 80%. 
   
   
       5 . The copolymer of  claim 3  wherein said acetoacetylation step is carried out in a non-aqueous medium. 
   
   
       6 . The copolymer of  claim 5  wherein said acetoacetylation step is carried to a degree of at least 50%. 
   
   
       7 . An inkjet recoding medium comprising a support and a hydrophobic crosslinkable acetacetylated lactam/vinyl alcohol copolymer. 
   
   
       8 . The inkjet recording medium of  claim 7  which has enhanced dye fade stability.