Melt-processed blends containing poly(vinyl alcohol)

Details Melt-processed blends containing poly(vinyl alcohol) Melt-processed blends containing poly(vinyl alcohol)

C - Chemistry, Metallurgy

08

L

C08L 29/04 (2006.01) C08L 51/00 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2198427

Polymers containing a high percentage of vinyl alcohol units are difficult to process into sheet, film, injection-molded objects, or fibers. Such melt-processing is greatly enhanced by admixing certain hydrogenated block copolymers formed by sequential anionic polymerization of butadiene and styrene, followed by hydrogenation, then followed by grafting of maleic anhydride.

Les polymères contenant un pourcentage élevé d'unités alcool de vinyle sont difficiles à traiter pour obtenir des pellicules, des films, des objets moulés par injection ou des fibres. Un traitement en fusion de ce type est grandement amélioré si on mélange certains copolymères bloc hydrogénés formés par polymérisation anionique séquentielle de butadiène et de styrène, suivie d'une hydrogénation, puis d'une greffe d'anhydride maléique.

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