Polymers obtained from oligomers of anhydride-grafted polypropylene, manufacturing process and uses
AssigneeSociete Atochem
InventorPierre Nogues
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Abstract
Polymers resulting from the association of two reactive components having a low melt viscosity, characterized in that one of the components is a polypropylene modified by grafting an unsaturated monomer bearing an acid anhydride group and the other is a compound R posessing at least two groups which are reactive towards this anhydride group. Uses in the manufacture of moulded articles by the reaction-injection-moulding technique, or in the manufacture of composite materials. Uses as coatings for metallic articles.
Claims5
A polymer obtained from the reaction of (a) an anhydride grafted polypropylene, having a melt viscosity below 500 Pa s, measured at 200.degree. C. at a shear rate 10s.sup.-1, essentially free of residual monomeric carboxylic acid anhydride, and (b) a compound R possessing at least two identical or non-identical groups reactive towards an anhydride group, the respective quantities of said grafted polypropylene and said compound R being such that their molarity ratio, defined as the ratio of the number of reactive groups carried by the compound R to the number of anhydride groups carried by the grafted polypropylene, is between 0.01 and 2.
Dependencies are inferred from the claim text.