Procédé de fabrication de polymères greffés à base de polypropyléne, contenants des groupes anhydrides

Process for making polypropylene graft copolymers containing anhydride groups

Verfahren zur Herstellung von Anhydrid-Gruppen enthaltenden Pfropfpolymerisaten

Abstract

A graft copolymer containing anhydride groups is made by (1) making a graft copolymer comprising a backbone of a propylene polymer material having graft polymerized thereto polymerized monomers selected from the group consisting of (a) at least one acrylic acid substituted with a 1-3 C alkyl group and (b) a mixture of at least one of these substituted acrylic acids and a vinyl compound capable of copolymerizing therewith, wherein the total amount of polymerized monomers is about 20 parts to about 240 parts per hundred parts of the propylene polymer material and the amount of the substituted acrylic acid is 60 mole % or more of the polymerized monomers, and (2) heating the graft copolymer to a temperature of about 170°C to about 300°C to dehydrate the acid groups in the graft copolymer to form anhydride groups.

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Patent Citations (3)

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    EP-0525710-A1February 03, 1993Montell North America Inc.Faser aus Propfcopolymer mit Propylenpolymer als Pfropfgrundlage
    GB-991572-AMay 12, 1965Toyo Rayon Kabushiki KaistaMethod of improving the dyeability of polyolefines
    US-5140074-AAugust 18, 1992Himont IncorporatedMethod of producing olefin polymer graft copolymers

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    US-6252005-B1June 26, 2001Montell Technology Company BvThermal oxidative stability of acrylic polymers
    WO-0008078-A1February 17, 2000Montell Technology Company B.V.Amelioration de la stabilite a l'oxydation thermique de polymeres acryliques