C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 12/04 (2006.01)
Patent
CA 2368853
The present invention is an improved process for producing high molecular weight monovinylidene aromatic polymers and polymodal compositions by free radical polymerization of a vinyl aromatic monomer in the presence of a vinyl acid, wherein the improvement comprises neutralizing the acid after production of the desired amount of high molecular weight monovinylidene aromatic polymer by adding a base.
La présente invention concerne une méthode améliorée qui permet de produire des polymères de monovinylidène aromatiques à poids moléculaire élevé et des compositions polymodales, par polymérisation radicalaire d'un monomère vinylique aromatique en présence d'un acide vinylique. La méthode améliorée consiste à neutraliser l'acide par adjonction d'une base, après production de la quantité désirée de polymère de monovinylidène aromatique à poids moléculaire élevé.
Pike William C.
Priddy Duane B.
Rego Jose M.
Roe James M.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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