Loading patent…
AssigneeExxon Chemical Patents Inc.
InventorsHerve M. Cheradame, Frank J. Chen, Jon E. R. Stanat, Hung A. Nguyen, Behrooz R. Tabar
Estimating the term…
A method is provided for the direct synthesis by living cationic polymerization of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino, cyanato, thiocyanato or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.
A method for the direct synthesis of polymeric materials functionalized with nitrogen-containing functional groups, comprising the steps of providing a cationically polymerizable monomer, and initiating living polymerization by the addition of a cationic polymerization catalyst, in the presence of a nitrogen-containing initiator compound having said nitrogen-containing functional group chemically bound to a release moiety, wherein the ratio of moles of catalyst to nitrogen-containing functional groups is greater than about 3.95:1 and wherein said nitrogen-containing functional group is at least one species selected from the group consisting of --NCO--, --OC.tbd.N, --SC.tbd.N, --CN and --NCS.
A polymer composition having the formula:
Dependencies are inferred from the claim text.