Reactive processing of polyaryletherketones
AssigneePolymics, Ltd.
InventorsYi-Feng WANG, Tim HSU, Dustin VEAZEY
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Abstract
Melt stable polyaryletherketoneketone are prepared by from a reactive, lower molecular weight polyaryletherketoneketone having an ultraviolet absorbance at 455 nm of at least 0.185 when measured in 0.1% solution in dichloroaeetic acid.
Claims18
A reactive polyaryletherketoneketone, which comprises:
- (i) an ultraviolet (UV) absorbance at 455 nm of greater than 0.185 and less than 0.600, measured in 0.1% solution in dichloroacetic acid;
- and (ii) an inherent viscosity of at least 0.35 dL/g, measured in 0.5% solution in concentrated sulfuric acid at 30° C.
A process for preparing a melt stable polyaryletherketoneketone, comprising steps of:
- preparing a reactive polyaryletherketoneketone having an inherent viscosity of at least 0.35 dL/g, as measured in 0.5% solution in concentrated sulfuric acid at 30° C., and having an UV absorbance at 455 nm of greater than 0.185 and less than 0.600, measured in 0.1% solution in dichloroacetic acid, and
- heating the reactive polyaryletherketoneketone to form the melt stable polyaryletherketoneketone.
A melt stable polyaryletherketoneketone prepared from a reactive polyaryletherketoneketone, wherein the reactive polyaryletherketoneketone has an ultraviolet (UV) absorbance at 455 nm, when measured in 0.1% solution in dichloroacetic acid, of greater than 0.185.
Dependencies are inferred from the claim text.