The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1991
Filed:
Oct. 20, 1988
Heinz Klippert, Burgkirchen, DE;
Manfred Engelmann, Burgkirchen, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process is described for the preparation of a polymer which contains, besides polymerized units of vinyl chloride, 30 to 60% by weight, relative to the polymer, of polymerized units of an acrylate, if appropriate together with copolymerizable monomers. The acrylate is firstly polymerized in aqueous emulsion with addition of a monomer containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the presence of a fatty acid salt and in the presence of an alkane- or alkylarylsulfonate. Polymerization in aqueous suspension is then carried out in which vinyl chloride, customary polymerization auxiliaries, a precipitant for the emulsifiers used in the emulsion polymerization, and water are initially introduced, and the acrylate dispersion produced by emulsion polymerization is subsequently added. Polymers of high bulk density and good free-flowing properties which can easily be demonomerized are thus obtained. Mixed with vinyl chloride homopolymers, moldings having good impact resistance and surface quality are obtained with good processability.