C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1338
C08F 251/02 (2006.01)
Patent
CA 1229941
GRAFT COPOLYMERS OF CARBOXYLATED CELLULOSE ESTER AND PROCESSES FOR THE PREPARATION THEREOF Abstract The present invention relates to graft copolymers and to a process for the preparation thereof. The polymeric compositions comprise the reaction product of an ethylenically unsaturated monomer and a carboxylated cellulose ester having an acid number of at least about 5, an inherent viscosity of from about 0.01 to about 1.00 and wherein the anhydroglucose units thereof have ring substituents comprising by weight based on total polymer weight, of from about 0.05 to about 20% hydroxyl groups, from about 0.5 to about 44% acetyl groups, from 0 to about 54% butyryl groups, from 0 to about 47% propionyl groups, from about 0.4 to about 4.0% total carboxyl groups wherein from about 20% to about 100% of these carboxyl groups are non-saponifiable backbone, and wherein the material has a lactone level of from about 4.52 x 10-5 to about 6.13 x 10-4. Preferred carboxylated cellulose esters include carboxylated cellulose acetate, carboxylated cellulose acetate propionate, carboxylated cellulose acetate butyrate, and mixtures thereof. The process of the present invention comprises reacting an ethylenically unsaturated monomer and a carboxylated cellulose ester at polymerization temperature (e.g., about 10 to 250°C) in the substantial absence of an additional initiator. The graft copolymers of the present invention are useful in a wide range of applications including coatings, inks, adhesives, textile fibers, cigarette filter tow, flexible films, molding compounds, and the like.
480052
Hawkins James M.
Jenkins Waylon L.
Sand Irving D.
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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