32509-66-3Relevant articles and documents
Preparation method of hindered phenol antioxidant and intermediate thereof
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Paragraph 0068-0078, (2020/10/04)
The invention provides a preparation method of a hindered phenol antioxidant and an intermediate thereof. The preparation method comprises the following steps of: carrying out Friedel-Crafts reactionon a compound a and a compound b under the action of a main catalyst organic sulfonic acid and/or trifluoroacetic acid and a cocatalyst to obtain a hindered phenol antioxidant intermediate shown as aformula I; wherein the structural formulas of the compound a, the compound b and formula I are shown as the specification, wherein R1 is selected from H and substituted or unsubstituted alkyl of C1-C4, and R2 is selected from substituted or unsubstituted alkyl of C1-C4. According to the preparation of the hindered phenol antioxidant intermediate, the organic sulfonic acid and/or trifluoroacetic acid are/is adopted to replace a hydrogen chloride gas catalyst, so that the reaction safety is greatly improved, the requirements on equipment are reduced, and the equipment cost is also reduced.
Lubricant composition
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, (2008/06/13)
A composition comprising a) a lubricant or a hydraulic fluid and b) at least one compound of the general formula I STR1 in which x=1 or 2 and, if x=1, R is as defined for R1 or R3 --O-- or, if x=2, R is as defined for R8, and R1 and R3 are, for example, alkyl, cycloalkyl, alkenyl, phenyl, naphthyl, aralkyl or alkaryl, or alkyl, cycloalkyl, alkenyl, phenyl, naphthyl, aralkyl or alkaryl, which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, e.g. --OCH3 or e.g. --COOCH3, or alkyl, cycloalkyl, alkenyl, aralkyl or alkaryl which are interrupted by one or more groups from the series comprising --O--, --S--, --NH--, STR2 or alkyl, cycloalkyl, alkenyl, aralkyl or alkaryl which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, e.g. --OCH3 or e.g. --COOCH3 and interrupted by one or more groups from the series comprising --O--, --S--, --NH--, STR3 and R2 is NR4 R5, --OR6 or --SR7, and R4 and R5 are identical or different and are, for example, --H, alkyl, phenyl, naphthyl, aralkyl or alkaryl, or R4 and R5, together with the N atom linking them, form, for example, a piperidine or morpholine radical, and R6 and R7 can be alkyl which may be interrupted by one or more groups from the series comprising --O--, --S--, --NH--, STR4 or are, for example, phenyl, naphthyl, alkaryl or aralkyl, and R8 can be alkylene which may be interrupted by at least one --O-- group or alkylidene which may be interrupted by at least one --O-- group. Some of the compounds of the formula I are novel. The compositions show an improved stability towards oxidative degradation, confer protection under extreme pressures and reduce frictional wear.
3,9-carbohydrate substituted 2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane phosphite stabilizers
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, (2008/06/13)
Carbohydrate substituted phosphites of Formula I STR1 where A is a carbohydrate residue are effective stabilizers for polymers processed at elevated temperatures and subject to thermal or oxidative degradation.
