Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-11-28
1976-11-30
Hoke, V.P.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 4575W, C08K 552
Patent
active
039948447
ABSTRACT:
Novel hindered zinc organic phosphites are produced by the reaction of zinc carboxylic acid salts and organic phosphites. The hindered zinc organic phosphites are excellent sources for zinc in vinyl halide resin stabilizers to prevent resin degradation by heat and light. Vinyl halide resin compositions containing the hindered zinc organic phosphites in relatively large amounts of divalent zinc can be processed under elevated temperatures over extended periods of time without undergoing catastrophic degradation.
The hindered zinc organic phosphites are characterized by the formulas: ##EQU1## Where R' is either an alkyl, aryl, aralkyl, or alkaryl radical with the proviso that at least one R' radical is aryl or alkaryl; and R" is aryl or alkaryl.
REFERENCES:
patent: 3219605 (1965-11-01), Klemchuk
patent: 3396144 (1968-08-01), Harrington et al.
patent: 3467683 (1969-09-01), Harson et al.
patent: 3481719 (1969-12-01), Patinkin
patent: 3733288 (1973-05-01), Minagawa et al.
Ahr Robert L.
Rhodes Philip H.
Emery Industries Inc.
Hoke V.P.
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