| abstract |
NEW MATERIAL: Hydroxyphenylcarboxylic acid compds. of formula I [wherein R 1 and R 2 are each an alkyl, cycloalkyl, phenyl or aralkyl; R' is H or methyl; n is 1 to 4 or 6; and A is OR 4 (in which R 4 is H, an alkyl, alkenyl or the like) when n is 1, a group of formula II (in which x is 2 to 20), formula III or the like when n is 2; a group of formula IV or the like when n is 3; a group of formula V or the like when n is 4, or a group of formula VI when n is 6]. n EXAMPLE: Octadecyl-2-methyl-3-(3',5'-di-tert. butyl)-U'-hydroxyphenyl) propionate. n USE: Functional fluids such as a lubricant, hydraulic fluid and metal working fluid, and antioxidant for synthetic polymers (particularly polyolefins). n PROCESS: For example, an alkyl-substituted phenol of formula VII is reacted with an excess amount of an olefin ester of formula VIII in the presence of a base at a temp. of 150 to 220°C to obtain a compd. of formula I. n COPYRIGHT: (C)1990,JPO |