Method for carrying out a mass polymerization

C - Chemistry – Metallurgy – 08 – F

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C08F 20/14 (2006.01) C08F 2/02 (2006.01)

Patent

CA 2514978

The invention relates to a method for carrying out a mass polymerisation of monomers and/or pre-polymers, which are at least partially soluble in their polymers, in particular methyl methacrylate (MMA), said method involving the addition of at least one monomer or pre-polymer in a reactor. The invention is characterised in that mass polymerisation for amorphous polymers is carried out without solvents below the glass transition temperature and for crystalline polymers below the melting point, achieving a high degree of conversion of the monomers.

La présente invention concerne un procédé pour effectuer une polymérisation en masse de monomères et/ou de prépolymères qui sont au moins partiellement solubles dans leur polymère, notamment de méthacrylate de méthyle (MMA). Ce procédé consiste à introduire au moins un monomère ou un prépolymère dans un réacteur. Selon cette invention, la polymérisation en masse doit être effectuée sans solvant dans le cas de polymères amorphes, en-dessous de la température de transition vitreuse ou, dans le cas de polymères cristallins, en-dessous du point de fusion, jusqu'à atteindre un haut degré de conversion des monomères.

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