Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1986-10-20
1988-05-10
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524181, 524281, 524280, 524397, C08K 558, C08K 501
Patent
active
047436409
ABSTRACT:
Compounds of formulae Ia and Ib ##STR1## wherein R.sup.1 is C.sub.6 -C.sub.22 alkyl, phenyl or phenyl which is substituted by one or two C.sub.1 -C.sub.9 alkyl groups, or is C.sub.5 -C.sub.7 cycloalkyl or a group of formula IIa or IIb ##STR2## or R.sup.1 is a group of formula IIIa or IIIb ##STR3## R.sup.2 and R.sup.3 are each independently of the other C.sub.1 -C.sub.20 alkyl, phenyl or phenyl which is substituted by one or two C.sub.1 -C.sub.9 alkyl groups, or are C.sub.5 -C.sub.7 cycloalkyl, and R.sup.4 is C.sub.2 -C.sub.12 alkylene, are suitable for stabilizing chlorinated polymers against light- and/or heat-induced degradation.
REFERENCES:
patent: 3746736 (1973-07-01), Sumimoto et al.
patent: 4102839 (1978-07-01), Crochemore et al.
CA 91 5953h (1979).
Michael, Arthur et al.: J. Am. Chem. Soc. vol. 53, pp. 2394-2415 (1931).
Michael, Arthur et al.: J. Org. Chem. vol. 3, pp. 372-384 (1939).
Minkin, V. I. et al.: Zh. Org. Khim 11(6), 1163-8 (1975).
R. P. Potman et al., J. Org. Chem. 50, 1955 (1985).
Michaelis Klaus-Peter
Wirth Hermann O.
Ciba-Geigy Corporation
Hall Luther A. R.
Hoke Veronica P.
McC. Roberts Edward
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