Dendritic polyetherketone and heat-resistant blend of PVC with the same
AssigneePolyplus, Inc.
InventorsSeung-yeop Kwak, Dae-up Ahn
Life of this patent
Estimating the term…
Abstract
A hyperbranched polyetherketone and a heat-resistant blend of polyvinylchloride with the same. The polyethereketone is synthesized by self-polycondensation of 3,5-bis[4-[(2,3,4,5,6-pentafluorophenyl)carbonyl]phenoxy]-4-hydroxbenzophenone or 3,5-difluoro-4-hydroxybenzophenone, and then substituting 50 to 80 mole % of fluorine atoms present in the side chains and ends of the PEK molecule by polar groups. In addition, a blend of polyvinylchloride can be manufactured using the hyperbranched polyetherketone by a melt blending technique applicable for industrial purpose at a temperature of 180 to 120° C., and thus the blend of polyvinylchloride with the polyetherekentone can be applied to high temperature end-use products such as hot water pipes.
Claims6
A polyetherketone synthesized by self-polycondensation of 3,5-difluoro-4′-hydroxybenzophenone having the formula (I)
- wherein 50 to 80 mole % of fluorine atoms present in the molecular structure of the polyetherkeone are substituted by polar groups having the formula (II)
- —O—A—CN (II)
- wherein A represents
- or alkylene groups of 1 to 3 carbon atoms, n has a value of from 0 to 2, and m has a value of 0 or 1.
Dependencies are inferred from the claim text.