Thermoplastic compositions with improved processing properties
AssigneeBASF SE
InventorsFranz Haaf, Guenter Hatzmann, Karl Herrle, Petr Simak
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Abstract
Mixtures based on vinyl chloride polymers and small amounts of copolymer of an ester of acrylic acid or methacrylic acid, which mixtures have been obtained by polymerization of vinyl chloride in the presence of the above copolymer. The said copolymer contains acrylic acid ester or methacrylic acid ester units, units which contain a lactone ring structure, and, optionally, units of other copolymerizable monomers. The mixtures exhibit improved processability and may in particular be used for the manufacture of films, sheets and the like.
Claims9
A thermoplastic composition containing a mixture of a vinyl chloride polymer and an acrylic ester copolymer or methacrylic ester copolymer, which mixture has been manufactured by polymerization of
- A. from 99.9 to 80 parts by weight of vinyl chloride or of a mixture of vinyl chloride with up to 30 percent by weight of one or more other monomers copolymerizable with vinyl chloride, in aqueous dispersion, in the presence of
- B. from 0.1 to 20 parts by weight of a copolymer of an acrylic acid ester or a methacrylic acid ester which contains
- B1. from 99.9 to 60 percent by weight of copolymerized units of an acrylic acid alkyl ester or methacrylic acid alkyl ester of 2 to 6 carbon atoms in the alcohol component,
- B2. from 0.1 to 30 percent by weight of units which contain a lactone ring structure and
- B3. from 0 to 39.9 percent by weight of units of one or more other copolymerizable monomers, the percentages being based on the above copolymer B.
Dependencies are inferred from the claim text.