Patent number: 4252698
Abstract: An anti-yellowing additive is provided for environmentally acceptable stabilized vinyl chloride polymer compositions from which arsenic, beryllium, cadmium, lead, mercury, and thallium are substantially excluded, comprising at least one overbased sulfonate or phenolate compound of lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, titanium, aluminum, zirconium, or tin, and a 1,3-diketone compound having 5 to 30 carbon atoms, which is a cyclic or open-chain 1,3-diketone or a lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, aluminum, tin or zirconium salt thereof.
Type:
Grant
Filed:
April 17, 1979
Date of Patent:
February 24, 1981
Assignee:
Argus Chemical Corporation
Inventors:
Michio Ito, Yoshimitsu Numajiri, Seiji Kimura, Tetsuo Sekiguchi