ESTER OF 3-TERTIARY-BUTYL- OR 3-TERTIARY- BUTYL-5-ALKYL-4-HYDROXYPHENYL-(ALKANE)-CARBOXYLIC ACID AND BIS-(4- OR 2-HYDROXYPHENYL)-ALKANES, -OXIDES, -SULFIDES AND -SULFONES, TRIS-(4- HYDROXYPHENYL)-ALKANE AND OXYETHYLATE OF 1,3,5,-TRIS- (4-HYDROXYPHENYL-ISOPROPYLIDENE)-ARYLENE,MANUFACTURE AND USEAS STABILIZER

摘要

Esters of 3-tert.-butyl- or 3-tert.-butyl-5-alkyl-4- hydroxyphenyl(alkan)oic acids of the formula I …IMAGE… where R1 = -C(CH3)3,… R2 = H, C1- to C4-alkyl, preferably -C(CH3)3,… m = 0 to 4, preferably 2,… with ethoxylates of bis(4- or 2-hydroxyphenyl)alkanes, oxides, sulphides and sulphones of the formula II, with ethoxylates of tris(4-hydroxyphenyl)alkanes of the formula IIIa or with ethoxylates of 1,3,5-tris(4-hydroxyphenylisopropylidene)arylene of the formula IIIb …IMAGE… where A = -CR3R4-, C2- to C12-alkanediyl-, -O-, -OCH2CH2O-, -S-, -SCH2CH2S-, -SO2-, -SO2CH2CH2SO2-, bis-isopropylidenearyl radicals (@ 1,4- or 1,3-bis-1-methylethylarylene radicals),… R3 and R4 = H, C1- to C8-alkyl, aryl, 4-[(4-hydroxyphenyl)isopropylidene]phenyl (@ 4[1-(4-hydroxyphenyl)- 1-methylethyl]phenyl), C5- to C12-cycloalkyl, preferably alkyl, but not R3 and R4 = CH3 if R5 and R6 = H, where for R3 and R4 = alkyl these substituents can also be closed to give an optionally alkyl-substituted ring having /= 12 C atoms (i.e. -CR3R4- = cycloalkylidene),… R5 and R6 = H, C1- to C4-alkyl, C5- to C12-cycloalkyl, C1- to C4-alkoxyl, preferably H,… where for R5 and R6 NOTEQUAL H in formula II not both substituents may be in the o- or o'-position to the phenolic hydroxyl,… R7 = H, C1- to C8-alkyl,… where the ethoxylates can contain at most 3 alkylene oxide units. …??To prepare these esters, the 3-tert.-butyl- or 3-tert.-butyl- 5-alkyl-4-hydroxyphenyl(alkan)oic acids or their derivatives are esterified with ethoxylates of the compounds mentioned or transesterified in the presence of catalysts known per se. …??The esters according to the invention are used for the stabilisation of polymers.