Process for the preparation of transparent high impact strength

Details Process for the preparation of transparent high impact strength Process for the preparation of transparent high impact strength

1974-12-09

1976-06-29

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 23AR, 260 23XA, 260235, 260878R, 260885, 260886, C08L 2706, C08L 2308, C08L 3102, C08L 2514

Patent

active

039668460

ABSTRACT:
Process for the preparation of a transparent, high-impact-strength and weather-resistant vinyl chloride polymer by the polymerization of vinyl chloride either together with or without other copolymerizable monomers in aqueous dispersion by the emulsion polymerization method in the presence of at least one acrylic ester copolymer. The process involves emulsion polymerizing vinyl chloride or a monomer mixture containing at least 80 percent by weight of vinyl chloride in the presence of a dispersion of at least one acrylic ester copolymer consisting of 55 to 94.7 percent by weight of at least one acrylic ester containing 3 to 18 carbon atoms in the ester group, 35 to 5 percent by weight of .alpha.-methyl styrene and 0.3 to 10 percent by weight of a polyfunctional monomer having at least two non-conjugated ethylenic double bonds, at least one of said double bonds being of the allyl type. The acrylic ester copolymer having a mean particle diameter of 30 to 150 nm, determined by soap titration. The acrylic ester copolymer is used in a quantity such that the resultant vinyl polymer contains 4 to 20 percent by weight of acrylic ester units.

REFERENCES:
patent: 3334156 (1967-08-01), Calentine et al.
patent: 3763279 (1973-10-01), Kelly
patent: 3776982 (1973-12-01), Nicolet et al.
patent: 3832318 (1974-08-01), Gallagher et al.
patent: 3843753 (1974-10-01), Owens
patent: 3851016 (1974-11-01), Nicolet et al.
patent: 3853968 (1974-12-01), Bortnick et al.

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