Method for the production of aqueous styrol-butadiene polymer dispersions
AssigneeBASF SE
InventorsWolfgang Gaschler, Christoph Hamers
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Abstract
Process for the preparation of an aqueous styrene/butadiene polymer dispersion by free radical aqueous emulsion polymerization of a monomer mixture M comprising from 30 to 80% by weight of styrene, from 20 to 70% by weight of butadiene and from 0 to 40% by weight of at least one ethylenically unsaturated comonomer differing from styrene and butadiene, based in each case on the total amount of the monomer mixture I, by a monomer feed process in the presence of a noncopolymerizable hydroperoxide of the general formula R—O—O—H as a regulator, in which the monomer mixture M is fed to the polymerization vessel in the course of 4 hours.
Claims18
A process for the preparation of an aqueous styrene butadiene polymer dispersion by free radical aqueous emulsion polymerization of a monomer mixture M comprising
- from 30 to 80% by weight of styrene,
- from 20 to 70% by weight of butadiene and
- from 0 to 40% b weight of at least one ethylenically unsaturated comonomer differing from styrene and butadiene,
- based in each case on the total amount of the monomer mixture M, by a monomer feed process in the presence of a noncopolymerizable hydroperoxide of the general formula R—O—O—H as a regulator, where R may be hydrogen, C1-C18-alkyl, C7-C22-aralkyl or a saturated or unsaturated carbocyclic or heterocyclic ring having 3 to 18 carbon atoms, wherein the monomer mixture M is fed to the polymerization vessel in the course of 4 hours.
Dependencies are inferred from the claim text.