Melt-stable poly(arylene thioether-ketone) and production process thereof
CA 1304534 C · Owner: Kureha Kagaku Kogyo K.K. · Inventors: Shiiki, Zenya; Satake, Yoshikatsu; Katto, Takayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Disclosed herein are a melt-stable poly(arylene thioether-ketone) having predominant recurring units of the formula , and having a melting, point Tm of 310-380°C, a residual melt crystallization enthalpy, .DELTA.Hmc (420°C/10 min) of at least 10 J/g, a melt crystallization temperature Tmc (420°C/10, min) of at least 210°C, and a reduced viscosity of 0.2-2 d?/g as measured at 25°C and a polymer concentration of 0.5 g/d? in 98 wt.% sulfuric acid as well as a production process of the poly(arylene thioether-ketone). The poly(arylene thioether-ketone) has melt stability so that conventional melt processing techniques can be applied easily. The poly(arylene thioether-ketone) is a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.