Process for the preparation of grafted copolymers
AssigneeProduits Chimiques Ugine Kuhlmann
InventorJacques Delsarte
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Abstract
This invention relates to a method of preparing graft polymers by mass polymerizing a mixture of polymerizable vinyl monomers in the presence of an elastomer to which the vinyl monomers are to be grafted, the elastomer being soluble in at least one of the vinyl monomers and also insoluble in at least one of the vinyl monomers, which comprises: A. dissolving an elastomer in at least one monomer in which it is soluble; B. initiating a mass prepolymerization reaction; C.introducing the monomer or monomers in which the elastomer is insoluble during the prepolymerization reaction; D. completing the addition of the monomer or monomers prior to the phase inversion of the reaction medium; and E. completing the polymerization.
Claims15
A method of preparing grafted polymers by mass polymerizing a mixture of polymerizable vinyl monomers in the presence of an elastomer on which the vinyl monomers are to be grafted, the elastomer being soluble in at least one of the vinyl monomers and also insoluble in at least one of the vinyl monomers, which comprises:
- a. dissolving an elastomer in at least one monomer in which it is soluble;
- b. initiating a mass prepolymerization reaction;
- c. introducing the monomer or monomers in which the elastomer is insoluble during the prepolymerization reaction;
- d. completing the addition of the monomer or monomers during the prepolymerization reaction prior to the phase inversion of the reaction medium;
- and
- e. completing the polymerization.
Dependencies are inferred from the claim text.