Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-09-05
1992-03-10
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
548260, 252401, C08K 53472
Patent
active
050950622
ABSTRACT:
Liquid substituted, 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 30 carbon atoms in the presence of an acid catalyst at 100.degree.-200.degree. C. The liquid mixtures exhibit outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.
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Detiefsen Robert E.
Leppard David
Luisoli Reto
Stegmann Werner
Winter Roland A. E.
Ciba-Geigy Corporation
Hall Luther A. R.
Morgan Kriellion S.
Yoon Tae H.
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