Laundry detergents containing soil release polymers
The invention relates to liquid laundry detergent compositions comprising a) one or more polyesters comprising one or more of the repeating structural unit (a1) and one or more of the repeating structural unit (a2) wherein G 1 is one or more of (C n H 2n O) with n being a number of from 2 to 10, R 1 is H or COR 2 , R 2 is X—(C 3 H 6 O) p —(C 2 H 4 O) q —Y wherein X is NH or O, Y is a C 1-30 alkyl, the (C 3 H 6 O)— and (C 2 H 4 O)-groups may be arranged blockwise, alternating, periodically and/or statistically and wherein the connections of the groups (C 3 H 6 O)— and (C 2 H 4 O)— to X— and —Y are free to vary, or O-G 1 -H, p is based on a molar average, a number of from 0 to 60, q is based on a molar average, a number of from 1 to 300, and b) one or more surfactants. The one or more polyesters of component a) possess advantageous stability in alkaline environments, possess beneficial solubility and advantageously are clearly soluble in alkaline compositions such as liquid laundry detergent compositions and also possess advantageous soil release and soil removal properties on fatty and oily stains.
1. A liquid laundry detergent composition comprising
a) at least one polyester having an average molecular weight (M w ) from 3000 to 40000 g/mol comprising at least one of the repeating structural unit (a1) and at least one of the repeating structural unit (a2)
wherein
G 1 is at least one of (C 2 H 4 O), (C 3 H 6 O) or (C 4 H 8 O),
R 1 is H or COR 2 ,
R 2 is X—(C 3 H 6 O) p —(C 2 H 4 O) q —Y wherein X is NH, Y is a C 1-4 alkyl the (C 3 H 6 O)— and (C 2 H 4 O)-groups may be arranged blockwise, alternating, periodically and/or statistically, and wherein the connections of the groups (C 3 H 6 O)— and (C 2 H 4 O)— to X— and —Y are free to vary,
p is based on a molar average, a number of from 0 to 60,
q is based on a molar average, a number of from 1 to 300,
wherein the polyesters besides the at least one repeating structural unit comprise terminal groups which are connected to the CO group of the repeating structural units (a1) and (a2) and which are selected from the group consisting of HO, OCH 3 , HOG 1 and R 2 or which are connected to the G 1 group of the repeating structural units (a1) and (a2) and which are selected from the group consisting of H, CO(C 6 H 4 )COR 2 and CO(C 6 H 2 )COR 2 R 1 COR 2 , wherein R 1 and R 2 are defined above,
and
b) at least one surfactant, wherein
the at least one polyester of component a) are present in an amount from 0.1 wt.-% to 10 wt.-%, based on the total weight of the liquid laundry detergent composition, and
the at least one surfactant of component b) are present in an amount from 5 wt.-% to 65 wt.-%, based on the total weight of the liquid laundry detergent composition.
2. The liquid laundry detergent composition according to claim 1 , wherein the at least one repeating structural unit (a2) is selected from the group consisting of the repeating structural units (a2.1) and (a2.2)
3. The liquid laundry detergent composition according to claim 1 , wherein the sum of p and q, based on a molar average, is a number of from 1 to 360.
4. The liquid laundry detergent composition according to claim 1 , wherein the at least one polyester of component a) additionally comprises at least one of the repeating structural unit (a3)
wherein
G 1 is at least one of (C 2 H 4 O), (C 3 H 6 O) or (C 4 H 8 O), and
X + is a counter-ion.
5. The liquid laundry detergent composition according to claim 1 , wherein the average number of repeating structural unit (a1) in the at least one polyester of component a) is from 2 to 200, and the average number of repeating structural unit (a2) in the at least one polyester of component a) is from 1 to 25.
6. The liquid laundry detergent composition according to claim 1 , wherein the ratio of the average number of repeating structural unit (a1) in the at least one polyester of component a) to the average number of repeating structural unit (a2) in the at least one polyester of component a) is from 2 to 8.
7. The liquid laundry detergent composition according to claim 1 , wherein the total amount of repeating structural units (a1) and (a2) in the at least one polyester of component a), based on the total weight of the at least one polyester of component a), is at least 30 wt.-%.
8. The liquid laundry detergent composition according to claim 4 , wherein the amount of repeating structural unit (a3) in the at least one polyester of component a), based on the total weight of the at least one polyester of component a), is at least 0.1 wt.-%.
9. The liquid laundry detergent composition according to claim 1 , wherein the repeating structural units of the at least one polyester of component a) are exclusively selected from the group consisting of repeating structural units (a1) and (a2).
10. The liquid laundry detergent composition according to claim 1 , wherein G 1 is (C 3 H 6 O).
11. The liquid laundry detergent composition according to claim 1 , wherein the at least one polyester of component a) comprise repeating structural units exclusively selected from the group consisting of the repeating structural units (a1) and (a2), whereby at least one of the repeating structural unit (a1) and at least one of the repeating structural unit (a2) must be present
wherein
G 1 is (C 3 H 6 O),
R 1 is H,
R 2 is X—(C 3 H 6 O) p —(C 2 H 4 O) q —Y wherein X is NH, Y is a C 1-4 alkyl, the (C 3 H 6 O)— and (C 2 H 4 O)-groups may be arranged blockwise, alternating, periodically and/or statistically, and wherein the connections of the groups (C 3 H 6 O)— and (C 2 H 4 O)— to X— and —Y are free to vary,
p is based on a molar average, a number of from 0 to 15,
q is based on a molar average, a number of from 12 to 120.
12. The liquid laundry detergent composition according to claim 11 , wherein p, based on a molar average, is a number of from 2 to 15.
13. The liquid laundry detergent composition according to claim 1 , wherein the at least one polyester of component a) is present in an amount from 0.2 wt.-% to 5 wt.-% based on the total weight of the liquid laundry detergent composition.
14. The liquid laundry detergent composition according to claim 1 , wherein the at least one surfactant of component b) is selected from the group consisting of anionic, nonionic, cationic and zwitterionic surfactants.
15. The liquid laundry detergent composition according to claim 14 , wherein the at least one surfactant of component b) is selected from the group consisting of linear alkyl benzene sulfonates, alkyl ether sulfates, nonionic surfactants, amine oxides and betaines.
16. The liquid laundry detergent composition according to claim 1 , wherein the at least one surfactant of component b) is present in an amount from 6 to 60 wt.-% based on the total weight of the liquid laundry detergent composition.