Graft copolymers and process of making same

Abstract

Abstract A PROCESS FOR MAKING SUBSTANTIALLY PURE GRAFT POLYMERS COMPRISES THE STEPS OF SUBJECTING AN ORGANIC POLYMER HAVE A MOLECULAR WEIGHT OF AT LEAST 1500 TO THE ACTION OF OZONE AT A TEMPERATURE NOT EXCEEDING 130*C. TO FORM AN OZONIZED POLYMER AND THEN REACTING THE OZONIZED POLYMER WITH AT LEAST ONE POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER TO FORM A GRAFT COPOLYMER, THE OZONIZED POLYMER BEING THE SOLE ADDED GRAFTING CATALYST AND THE GRAFT COPOLYMER CONTAINING AT LEAST 5% POLYMER SUBSTRATE. THE MONOMER MAY BE IN VAPOR FORM. THE PROCESS MAY, IF DESIRED, BE APPLIED TO SHAPED OBJECTS SO AS TO FORM A GRAFT COPOLYMER ONLY AT THE SURFACE OF THE OBJECT. IN THIS EVENT, THE POLYMER IS SHAPED INTO THE FORM OF THE DESIRED POLYMERIC OBJECT AT LEAST PRIOR TO REACTING THE OZONIZED POLYMER WITH THE ETHYLENICALLY UNSATURATED MONOMER. THERE IS ALSO DISCLOSED A PROCESS FOR MODIFYING LINEAR POLYESTERS FREE FROM ALIPHATIC UNSATURATION AND HAVING LINKING GROUPS CHARACTERIZED BY THE PRESENCE OF AT LEAST ONE HETERO ATOM IN THE CHAIN, COMPRISING TREATING SUCH POLYESTERS WITH OZONE AND THEN WITH A FLUID ORGANIC COMPOUND CONTAINING CARBON-TO-CARBON ALIPHATIC ETHYLENIC UNSATURATION. THE RESULTING PRODUCTS ARE ALSO DISCLOSED.

Inventors

• 👤 Yvan Landler
• 👤 Pierre Henri Lebel

Bibliographic Details