Functionalized vinyl polymer nanoparticles
AssigneesCompagnie Generale des Etablissements, Michelin Recherche et Technique S.A.
InventorsSylvie Gandon-Pain, Alain Hut
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Abstract
Nanoparticles of functionalized, cross-linked vinyl polymer, usable as reinforcing filler in a polymeric matrix. The vinyl polymer is a copolymer of at least the following monomers, which are all copolymerizable by free-radical polymerization: a non-aromatic vinyl monomer “A”; a monomer “B” bearing a function Z of formula ≡Si—X, where X represents a hydroxyl or hydrolysable group; and a cross-linking monomer “C” which is at least bifunctional from the point of view of the polymerization. The vinyl polymer is preferably a polymethacrylate, in particular a copolymer of methyl methacrylate (monomer A), trimethoxysilylpropyl methacrylate (monomer B) and ethylene glycol dimethacrylate (monomer C), being in the form of nanobeads the diameter of which is of between 10 and 100 nm.
Claims11
A method for reinforcing a polymeric matrix, comprising:
- incorporating into the polymeric matrix reinforcing particles comprising:
- nanoparticles of functionalised, cross-linked vinyl polymer, usable as reinforcing filler in a polymeric matrix, wherein said vinyl polymer is a copolymer of at least the following monomers, which are all copolymerisable by free-radial polymerisation:
- a non-aromatic vinyl monomer “A”;
- a monomer “B” bearing a function Z of formula ═Si—X, X representing a hydroxyl or hydrolysable group;
- and
- a cross-linking monomer “C”, which is at least bifunctional from the point of view of said polymerisation;
- and wherein the polymer of the polymeric matrix comprises an elastomer.
A polymeric composition comprising:
- a polymeric matrix;
- nanoparticles of a functionalised, cross-linked vinyl polymer prepared by copolymerizing by free radial polymerisation:
- a non-aromatic vinyl monomer “A”;
- a monomer “B” bearing a function Z of formula ≡Si—X, X representing a hydroxyl or hydrolysable group;
- and
- a cross-linking monomer “C”, which is at least bifunctional from the point of view of said polymerisation;
- wherein the polymer of the polymeric matrix comprises an elastomer, and
- a coupling agent providing a bond between the polymer and the surface of the nanoparticles.
Dependencies are inferred from the claim text.