C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 255/02 (2006.01) B29C 47/00 (2006.01) C08F 255/00 (2006.01) C08L 51/06 (2006.01) C09J 151/06 (2006.01)
Patent
CA 2653174
An improved method for producing polypropylenes grafted with acrylic acid by means of reactive extrusion using an organic peroxide is disclosed, wherein the improvement comprises feeding the acrylic acid and the peroxide into the extruder downstream from the point where the polypropylene is introduced; wherein the acrylic acid is added at a feed rate greater than 25 pounds per hour, the. peroxide is added at a feed rate greater than 2 pounds per hour, and the total rate is greater than 500 pounds per hour; and whereby the PP-g-AA thus produced has a melt flow rate greater than about 200 dg per minute.
L'invention porte sur un procédé amélioré de production de polypropylènes greffés par de l'acide acrylique par extrusion réactive et à l'aide d'un peroxyde organique. Les améliorations consistent: à introduire l'acide acrylique et le peroxyde dans l'extrudeuse en aval du point d'introduction du polypropylène, le débit d'introduction de l'acide acrylique dépassant 25 livres/h, celui du peroxyde dépassant 2 livres/h et le débit total dépassant 500 livres/h, et le PP-g-AA ainsi produit ayant un indice de fluage supérieur à environ 200 dg/minute.
Syed Abuzar
Wefer John M.
Chemtura Corporation
Gowling Lafleur Henderson Llp
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