摘要:
An improved process for preparing dithiobisphenols wherein the appropriate phenol is reacted with sulfur monochloride in the presence of substantially molar amounts of an aliphatic or heterocyclic amine.
摘要:
Verbindungen der Formel worin A ein ein-, zwei-, drei- oder vierwertiger Rest eines Mono-, Di-, Tri- oder Tetraamins ist. Diese Verbindungen eignen sich ausgezeichnet als Stabilisatoren für organisches Material, insbesondere synthetische Polymere und Schmiermittel gegen thermischen, oxidativen oder lichtinduzierten Abbau. Für die Bedeutung der Symbole A, R,, R 2 , R 3 , R., m und n wird auf Anspruch 1 verwiesen.
摘要:
N-Allyl and N-methylene-thio substituted 2,3-dihydroperimidine compounds are very effective antioxidant stabilizers for organic material subject to oxidative or thermal degradation, particularly for lubricant compositions.
摘要:
2-(Benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoyl-benzyl)phenols of formula (I) are prepared by reacting a Mannich base of a 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazole with a 2-hydroxy-benzophenone. The hybrid products 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.
wherein T₁ is hydrogen, chloro, alkyl of 1 to 4 carbon atoms or -SO₃H, T₂ is alkyl of 1 to 12 carbon atoms, E₁ is hydrogen, chloro or -OE₂, E₂ is hydrogen or alkyl of 1 to 18 carbon atoms, E₃ is hydrogen, alkyl of 1 to 4 carbon atoms, chloro or -SO₃H, E₄ is hydrogen, chloro or -OE₅, E₅ is hydrogen or alkyl of 1 to 18 carbon atoms, and E₆ is hydrogen, hydroxyl or carboxy.
摘要:
N-Allyl and N-methylene-thio substituted naphthalene-1,8- or -1,5-diamine compounds are very effective antioxidant stabilizers for organic material subject to oxidative or thermal degradation, particularly for lubricant compositions.
摘要:
Verbindungen der Formel I eignen sich als Stabilisatoren für organische Polymere und für Schmiermittel. Die Reste R 1 bis R a bedeuten unabhängig voneinander Wasserstoff, Alkyl, Phenyl oder Aralkyl.