초록 ▼

Nitrogen-containing phosphorus-free carboxylic acid derivatives made by reaction of an acylating agent with an alkanol tertiary monoamine are described. Typically the carboxylic acylating agent is an alkyl or alkenyl succinic anhydride containing about 20 to about 500 carbon atoms in the alkyl or al

Nitrogen-containing phosphorus-free carboxylic acid derivatives made by reaction of an acylating agent with an alkanol tertiary monoamine are described. Typically the carboxylic acylating agent is an alkyl or alkenyl succinic anhydride containing about 20 to about 500 carbon atoms in the alkyl or alkenyl group. A typical amine is diethyl ethanol amine. These derivatives are useful in incorporating oil-soluble, water-insoluble functional additives, such as metal salts of acid phosphate and thiophosphate hydrocarbyl esters, into water-based functional fluids such as water-based hydraulic fluids.

대표청구항 ▼

A nitrogen-containing, phosphorus-free carboxylic acid derivative made by reaction of a mixture consisting essentially of: (A) at least one carboxylic acid acylating agent having at least one hydrocarbyl-based substituent of about 50 to about 500 carbon atoms; (B) at least one alkanol tertiary monoa

A nitrogen-containing, phosphorus-free carboxylic acid derivative made by reaction of a mixture consisting essentially of: (A) at least one carboxylic acid acylating agent having at least one hydrocarbyl-based substituent of about 50 to about 500 carbon atoms; (B) at least one alkanol tertiary monoamine having the formula [Figure] wherein each R is a lower alkyl group and R′is an alkylene group of two to about eighteen carbon atoms; and (D) at least one other alkanol amine having the formula R1R2N-R3-OH, wherein R1 and R2 are each hydrogen, alkyl, alkenyl, hydroxy alkyl or hydroxy alkenyl and R3 is alkylene; the amount of said other alkanol amine (D) being no more than about 50 mole percent of the amount of (B) and (D) combined; and the equivalent ratio of acylating agent (A) to the amount of (B) and (D) combined is in the range of about 1:0.5 to about 1:3.0.