Aqueous composition of a betaine with solids content of at least 45% by weight
An aqueous composition comprising solution of a betaine of the following general Formula I is disclosed Formula I in which R is an alkyl group of coconut fatty acids, preferably hydrogenated coconut fatty acids, or a fatty acid mixture which, on the average, corresponds to coconut fatty acids, wherein the solution has a solids content of at least 45% by weight, a pH of 4.5 to 8, an amidoamine content of not more than 1% by weight, and a free fatty acid content less than 1% by weight, an N-acyl α-aminoacids content between 0.5 to 3% by weight and 0 to 4% by weight of glycerin, based on the solution.
1. An aqueous betaine composition comprising, a betaine of Formula I,
wherein, R is an alkyl group of coconut fatty acids, preferably hydrogenated coconut fatty acids, or a fatty acid mixture which, on the average, corresponds to coconut fatty acids,
an amidoamine of not more than 1% by weight,
a free fatty acid less than 1% by weight,
0 to 4% by weight of glycerin, based on composition,
less than 5 ppm of free sodium monochloroacetate and,
0.5 to 3% by weight of N-acyl α-amino acids of Formula III wherein R′ is selected from saturated or unsaturated alkyl group with carbon atoms from 8 to 20 and R″ is selected from H, methyl, ethyl or phenyl,
wherein the composition has a solids content of at least 45% by weight, a minimum of 35% by weight of active betaine, and a pH of 4.5 to 8.
2. An aqueous betaine composition comprising a betaine of Formula I,
wherein, R is hydrogenated coconut fatty acid,
up to 1.0% by weight of an amidoamine,
0.9% by weight of a free fatty acid,
3.0% by weight of glycerin,
less than 5 ppm of free sodium monochloroacetate and,
0.6% by weight is of N-cocoyl glycine of Formula III, wherein R′ is cocofatty acid and R″ is H,
wherein the composition has a solids content of at least 45% by weight, a minimum of 35% by weight of active betaine, and a pH of 4.5 to 8.
3. The aqueous betaine composition of Formula I as claimed in claim 1 , wherein
the coconut fatty acid is selected from hydrogenated coconut fatty acids,
a fatty acid mixture or a mixture thereof which, on the average, corresponds to coconut fatty acids.
4. A process for preparing an aqueous composition comprising a betaine of Formula I,
wherein, R is an alkyl group of coconut fatty acids, or a fatty acid mixture which, on the average, corresponds to coconut fatty acids, an amidoamine of not more than 1% by weight, a free fatty acid less than 1% by weight, 0 to 4% by weight of glycerin, based on composition, less than 5 ppm of free sodium monochloroacetate and, 0.5 to 3% by weight of N-acyl α-amino acids of Formula III wherein R′ is selected from saturated or unsaturated alkyl group with carbon atoms from 8 to 20 and R″ is selected from H, methyl, ethyl or phenyl,
wherein the composition has a solids content of at least 45% by weight and a pH of 4.5 to 8,
said process comprising quatemisation of amidoamine of Formula II,
wherein, R is an alkyl group of coconut fatty acids or a fatty acid mixture which, on the average, corresponds to coconut fatty acids alkyl group, with sodium salt of monochloroacetic acid at 80-85° C. while maintaining the pH between 7.5 to 8.5 by adding concentrated solution of sodium hydroxide; adding N-acyl α-aminoacids of Formula III, in an amount 0.5 to 3% by weight; raising the pH to between 10 to 10.5 and reaction is continued at a temperature of between 90-98° C. for a period of 4-8 hours and thercafter adjusting the pH to 4.5 to 6.0 with a mineral acid.
5. The aqueous betaine composition of claim 1 ; wherein said aqueous betaine composition is a pourable and flowable liquid at ambient temperatures.
6. The aqueous betaine composition of claim 1 , wherein the composition has a solidification point of less than 5° C.
7. The aqueous betaine composition of claim 1 , wherein the composition has a cloud point above 35° C.
8. The aqueous betaine composition of claim 2 , wherein said aqueous betaine composition is a pourable and flowable liquid at ambient temperatures.
9. The aqueous betaine composition of claim 2 , wherein the composition has a solidification point of less than 5° C.
10. The aqueous betaine composition of claim 2 , wherein the composition has a cloud point above 35° C.
11. The aqueous betaine composition of claim 1 , wherein the pH is 4.5 to 6.5.
12. The aqueous betaine composition of claim 1 , wherein the pH is 4.5 to 5.5.
13. The aqueous betaine composition of claim 2 , wherein the pH is 4.5 to 6.5.
14. The aqueous betaine composition of claim 2 , wherein the pH is 4.5 to 5.5.