Hyperbranched maleic anhydride-diene polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsStephen Ernest Jacobson, Patricia Metzger Cotts
Life of this patent
Estimating the term…
Abstract
A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A process to prepare the hyperbranched polymer comprises contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.
Claims13
1-14. (canceled)
A process to prepare a hyperbranched polymer comprising contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.
A process for the preparation of the hyperbranched polymer comprising contacting maleic anhydride and at least one terminally unsaturated diene containing from 7 to 14 carbon atoms and optionally at least one 1-alkene containing from 4 to 18 carbon atoms in an aprotic solvent, in the presence of an effective amount of a radical initiator wherein the molar ratio of diene to the maleic anhydride as charged is at least about 1:1 and the molar ratio of 1-alkene to the maleic anhydride as charged is from about 0 to about 0.9:1, wherein the concentration of monomers relative to the solvent is below about 50% by weight of solvent.
Dependencies are inferred from the claim text.