Ultra-high molecular weight poly(vinylidene fluoride)
AssigneeArkema Inc.
InventorRamin Amin-Sanayei
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Abstract
The invention relates to a polyvinylidene fluoride polymer having an ultra-high molecular weight, and unexpected physical properties. The ultra-high molecular weight polymer is clear, has a lower melting point, reduced crystallinity, excellent impact resistance, and a high elongation at the yield point. The ultra-high molecular weight polyvinylidene fluoride can be alone, or blended with other polymers, in final applications and articles.
Claims10
A process for forming an ultra-high molecular weight polyvinylidene fluoride, comprising the step of adding in the initial charge organic peroxide and/or chain transfer agent to a polymerization reactor, wherein the total level of chain transfer agent added is 500 ppm or less, and the total organic charges including both organic peroxide plus chain transfer agent added is from 100 to 2000 ppm based on the total weight of monomer, wherein said process is a semi-batch emulsion process, and wherein said ultra-high molecular weight polymer formed has a solution viscosity of greater than 35 Pa-s at 10% PVDF in n-methyl pyrrolidone (NMP) at 20° C. and 0.1 s−1.
Dependencies are inferred from the claim text.