Abstract: This invention is concerned with the stabilization of oxidizable organic materials such as rubbers, oils, plastics and the like through the addition of an autosynergistic phenolic antioxidant reaction product to the oxidizable organic material. More specifically, this invention is directed to a definitive process for the preparation of an alkylated phenol/formaldehyde/mercaptan reaction product comprising the simultaneous acid catalyzed reaction of specific reactants at specific molar ratios under azeotroping conditions and the use of the reaction product in oxidizable organic materials.

Abstract: Thermally stable compositions, also showing high fluidity in the molten state comprise polyphenylene oxide, or a mixture of polyphenylene oxide with a styrene polymer, and a stabilizer system consisting of 2,4-bis(n-octylthio)-6-(4-hydroxy-3,5-di-tert.butylanilino)-1,3,5-triazine and dilauryl thiopropanoate.

Abstract: Novel o-bridged polynuclear polyphenols of the formula I ##STR1## which contain at least one organic radical, such as alkyl, cycloalkyl or aryl, per phenyl nucleus and are formed by condensation of the monomeric phenolic components with customary bridging reagents, such as formaldehyde, acetone or sulfur dichloride, or by oxidative coupling of the monomeric phenolic components, and which, depending on the reaction procedure, can contain between 2 and 50 monomer units, are described.The substances according to the invention can be used for stabilizing plastics from oxidative degradation and have a good resistance to extraction.

Abstract: The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.

Abstract: Organic materials are stabilized against thermal, oxidative and photo-degradation by incorporating therein an effective amount of a compound of formula I ##STR1## wherein T.sub.1 and T.sub.2 independently are alkyl, cycloalkyl, phenyl, aralkyl, T.sub.2 may also be hydrogen, T is alkyl, phenyl or substituted hydroxyphenyl, E is a direct bond, alkylene, cycloalkylene, phenylene or --CH.sub.2 CH(ST)CH.sub.2 --, T.sub.3 and T.sub.4 are independently hydrogen, alkyl or cycloalkyl; or together are alkylene, T.sub.5 is hydrogen, alkyl or phenyl, n is 1 or 2, t is 0 or 1, and t is 2-n. Polyolefins, ABS resins, natural and synthetic rubbers and polyesters are particularly well stabilized by the compounds of formula I.

Abstract: Organic materials are stabilized against thermal, oxidative and photo-degradation by incorporating therein an effective amount of a compound of formula I ##STR1## wherein R is tert-butyl, R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 17 carbon atoms, cyclohexyl, cyclohex-3-enyl, phenyl or 3,5-di-tert-butyl-4-hydroxyphenyl; where R.sub.1 and R.sub.2 together must have a total of at least 5 carbon atoms; or where R.sub.1 and R.sub.2 together are alkylene of 5 to 11 carbon atoms. Polyolefins, ABS resins, natural and synthetic rubbers and polyesters are particularly well stabilized by the compounds of formula I.

Abstract: Organic materials are stabilized against thermal, oxidative and photo-degradation by incorporating therein an effective amount of a compound of formula I ##STR1## wherein T.sub.1 T.sub.2 independently are alkyl, cycloalkyl, phenyl, aralkyl, T.sub.2 may also be hydrogen, T is alkyl, phenyl or substituted hydroxyphenyl, E is a direct bond, alkylene, cycloalkylene, phenylene or --CH.sub.2 CH(ST)CH.sub.2 --, T.sub.3 and T.sub.4 are independently hydrogen, alkyl or cycloalkyl; or together are alkylene, T.sub.5 is hydrogen, alkyl or phenyl, n is 1 or 2, t is 0 or 1, and t is 2-n. Polyolefins, ABS resins, natural and synthetic rubbers and polyesters are particularly well stabilized by the compounds of formula I.

Abstract: The invention relates to phenols which contain a number of aromatic nuclei and in which the bridge formation of these nuclei is in the meta-position to the OH groups. These phenols have the formula I, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in claim 1.The novel phenols are most suitable for use as stabilizers for organic polymers and lubricants and have particularly good color properties.

Abstract: The invention relates to phenols which contain a number of aromatic nuclei and in which the bridge formation of these nuclei is in the meta-position to the OH groups. These phenols have the formula I, ##STR1## or ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, A and n are as defined in claim 1.The novel phenols are most suitable for use as stabilizers for organic polymers and lubricants and have particularly good color properties.

Abstract: Compositions which are effective in stabilizing polymers against the deteriorative effects of heat are provided comprising (1) an organic antimony compound or mixture of organic antimony compounds and (2) an organic compound or mixture of organic compounds having an aromatic ring which is substituted with hydroxy (--OH) and mercapto (--SH) groups ortho to each other. Also provided are polymer compositions containing said stabilizers and articles of manufacture made from said stabilized polymer compositions.

Abstract: There is disclosed a method for the stabilization of polyester resins by incorporating in the resins certain types of 4-mercaptophenol derivatives.

Abstract: Mercaptophenols are reacted with compounds containing olefinic unsaturation, or polycyclic olefins, or dihydroxy compounds to form phenolic antioxidants such as 3,8-bis(4-hydroxyphenylthio)-tricyclo[5.2.1.0..sup.2,6 ] decane; 1,4-bis[2-(4-hydroxyphenylthio)ethyl]benzene and age resistant polymers containing said antioxidants.