Process for the preparation of a graft copolymer bound catalyst
OwnerJan H. Nasman, Mats J. Sundell +1inventors
InventorsJan H. Nasman, Mats J. Sundell, Kenneth B. Ekman
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Abstract
The object of the present invention is a process of preparation of a graft copolymer obtained by pre-irradiation grafting of vinyl monomers onto polyolefins or fluorinated polyethylenes, in particular, of grafting acrylic or methacrylic acid onto polyethylene and/or polypropylene and subsequently loading a metal, such as a transition metal on the graft copolymer obtained. Such metal-loaded graft copolymers find use, especially as catalysts, e.g. for hydrogenation reactions.
Claims6
A metal loaded graft copolymer comprising a polymer backbone selected from the group consisting of polyolefins and fluorinated polyethylene, that is grafted with acrylic and/or methacrylic acid monomer, wherein the weight ratio between grafted monomer and polymer backbone being from 0.5 to 20, and the mole ratio between loaded metal and grafted monomer being from 0.001 to 0.5, the copolymer being obtained by
- exposing the said polymer backbone to radiation in an inert atmosphere,
- immersing the irradiated polymer in an aqueous solution of the monomer selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof,
- separating the resulting graft copolymer, and
- loading a transition metal ion onto the graft copolymer.
Dependencies are inferred from the claim text.