Method of dispersing solid additives in polymeric resins

Details Method of dispersing solid additives in polymeric resins Method of dispersing solid additives in polymeric resins

C - Chemistry, Metallurgy

08

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C08L 69/00 (2006.01) C08J 3/00 (2006.01) C08J 3/21 (2006.01) C08J 3/215 (2006.01) C08J 5/18 (2006.01) C08L 27/18 (2006.01) C08L 67/02 (2006.01) C08L 101/00 (2006.01) C08L 27/12 (2006.01)

Patent

CA 2108411

METHOD OF DISPERSING SOLID ADDITIVES IN POLYMERIC RESINS ABSTRACT OF THE DISCLOSURE A method for dispersing solid forms of additives in polymeric resins involves adding dispersions or solutions of additive(s) to a solution of resin in a tubular mixer (preferably in the presence of a stationary mixer). The mixer leads to a steam precipitation step wherein all fluid ingredients in the mixture are volatilized leaving the solid additive and resin in the desired ratio. This results in a uniform dispersion of the additives in the polymer matrix. As a result of the high dispersion, physical properties of the polymer are preserved. In one illustration, PTFE as a drip inhibitor additive, is added to polycarbonate resin to obtain a highly dispersed PTFE concentrate of improved drip-inhibition without loss of mechanical properties.

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