Melt processible polyether ether ketone polymer
AssigneeGharda Chemicals Limited
InventorsKeki Hormusji Gharda, Prakash Druman Trivedi, Venkat Srinivasan Iyer, Utpal Mahendra Vakil, Sanjav Chintaman Limaye
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Abstract
A melt processible Polyether Ether Ketone (PEEK) polymer with novel end-group structure is synthesized electrophilically using Methane Sulfonic Acid containing Methane Sulfonic Anhydride or Phosphorous Pentoxide. The product so obtained shows controlled structure with elimination of reactive end group like —COOH and is therefore melt processible by conventional techniques and exhibits high thermal and mechanical properties making it useful high temperature engineering and specialty plastics. It can be extruded into a rod, film and can also be molded into commercially useful products.
Claims23
A process for the production of a melt processible polyether ether ketone polymer (PEEK), containing a reduced concentration of any reactive end-groups on its backbone and having predominantly repeat units (I) with suitably modified end groups, i.e. —OR
- comprising the steps of electrophilically polymerizing phenoxy phenoxy benzoic acid (PPBA) using an alkane sulfonic acid as a solvent in the presence of a condensing agent and optionally a diluent, in the temperature range of 40° to 160° C., end-capping the PEEK polymer using an endcapping agent, precipitating the PEEK produced in water after it has achieved a desired Inh.V., removing acid residues produced by treatments with water and later with an organic solvent or with a bicarbonate solution, and then filtering and drying the PEEK produced to give melt processible PEEK.
Dependencies are inferred from the claim text.