Stabilization of amido acids with antioxidants
OwnerDale Elbert Van Sickle, George Chester Zima +2inventors
InventorsDale Elbert Van Sickle, George Chester Zima, Jeffrey Scott DuPont, Robert Richard Dykstra
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Abstract
The invention relates to stabilized amido acid compositions. More particularly, the invention relates to compositions of amido acids, such as 6-nonanoylamidohexanoic acid, stabilized with antioxidants. The stabilized amido acid compositions are useful in the manufacture of bleach activators such as sodium nonanamidohexanoyloxybenzenesulfonate. Bleach activators made from the stabilized amido acids of the invention are capable of possessing improved coloration.
Claims12
A stabilized amido acid composition comprising an effective stabilizing amount of an antioxidant and an amido acid of formula I or II:
- wherein R1 is selected from C1-C22 alkyl, C2-C22 alkenyl, C2-C22 alkynyl, C3-C22 cycloalkyl, and C6-C14 aryl;
- R2 and R5 are each independently selected from hydrogen, C1-C22 alkyl, C2-C22 alkenyl, C2-C22 alkynyl, C3-C22 cycloalkyl, C6-C14 aryl, and where in formula II, R2 and R5 can together with the nitrogen carrying them form a C3-C10 heterocycle;
- R3 and R4 are each independently selected from hydrogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, C6-C10 aryl and where R3 and R4 can together with the carbon carrying them form a C3-C10 cycloalkyl;
- and
- n is an integer from 0 to 20.
A process for preparing a stabilized amido acid composition comprising admixing a stabilizing effective amount of an antioxidant and an amido acid of formula I or formula II:
- wherein R1 is selected from C1-C22 alkyl, C2-C22 alkenyl, C2-C22 alkynyl, C3-C22 cycloalkyl, and C6-C14 aryl;
- R2 and R5 are each independently selected from hydrogen, C1-C22 alkyl, C2-C22 alkenyl, C2-C22 alkynyl, C3-C22 cycloalkyl, C6-C14 aryl, and where in formula II, R2 and R5 can together with the nitrogen carrying them form a C3-C10 heterocycle;
- R3 and R4 are each independently selected from hydrogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, C6-C10 aryl and where R3 and R4 together with the carbon carrying them form a C3-C10 cycloalkyl;
- and
- n is an integer from 0 to 20.
Dependencies are inferred from the claim text.