Low viscosity polyorganosiloxanes comprising quaternary ammonium groups, methods for the production and the use thereof

1. A polyorganosiloxane compound comprising:

a) at least one polyorganosiloxane group,

b) at least one quaternary ammonium group, and

c) at least one terminal ester group,

wherein the polyorganosiloxane compound is a linear copolymer compound which comprises the above functional groups (a) and (b) in at least two repeating units, with at least part of the terminal groups being terminal ester groups (c) that result from the use of monofunctional organic acids as chain stoppers, and

wherein the molar ratio of the quaternary ammonium groups b) and the terminal ester groups c) is less than 100:15.

2. The polyorganosiloxane compound according to claim 1 , further comprising

d) at least one polyalkylene oxide group.

3. The polyorganosiloxane compound according to claim 1 , comprising at least one polyalkylene oxide group of the general formula:

-A-E-A′-

wherein A and A′ each are independently from each other selected from a single bond or a divalent organic group having up to 10 carbon atoms and one or more hetero atoms, and

E is a polyalkylene oxide group of the general formulae:

—[CH 2 CH 2 O] q —[CH 2 CH(CH 3 )O] r —[CH 2 CH(C 2 H 5 )O] s —

with

q=0 to 200,

r=0 to 200,

s=0 to 200

and q+r+s =1 to 600.

4. The polyorganosiloxane compound according to claim 3 , wherein A and A′ are selected from the following groups

—CH 2 CH(CH 3 )—

—[CH 2 CH 2 O] q —[CH 2 CH(CH 3 )O] r —[CH 2 CH(C 2 H 5 )O] s —

—CH 2 C(O)O—, —CH 2 CH 2 C(O)O—, —CH 2 CH 2 CH 2 C(O)O—,

—OC(O)CH 2 —, —OC(O)CH 2 CH 2 —, —OC(O)CH 2 CH 2 CH 2 —,

—CH 2 C(O)—, —CH 2 CH 2 C(O)—, —CH 2 CH 2 CH 2 C(O)—,

—C(O)CH 2 —, —C(O)CH 2 CH 2 —, —C(O)CH 2 CH 2 CH 2 —,

—CH 2 CH(OH)CH 2 —, —O—CH 2 CH(OH)CH 2 —, —CH 2 CH(OH)CH 2 —O—,

—[CH 2 CH 2 O] q —[CH 2 CH(CH 3 )O] r —[CH 2 CH(C 2 H 5 )O] s —

wherein the subscripts q, r and s are as defined.

5. The polyorganosiloxane compound according to claim 1 , comprising at least one polyorganosiloxane group of the general formula:

—K—S—K—,

with

wherein R 1 =C 1 -C 22 -fluoralkyl or aryl,

n=0 to 1000, and these can be identical or different if several S Groups are present in the polyorganosiloxane compound,

K= is a bivalent or trivalent straight chain, cyclic and/or branched C 2 -C 40 hydrocarbon residue which is optionally interrupted by—O—, —NH—, trivalent N, —NR 1 —, —C(O)—, —C(S)—, and optionally substituted with—OH, wherein R 1 is defined as above, whereby the residues K can be identical or different from each other.

6. The polyorganosiloxarie compound according to claim 1 , comprising at least one repeating unit comprising at least one quaternary ammonium group selected from the general formulas:

—N + R 2 —,

—N + R 2 -T-N + R 2 —,

a saturated or unsaturated mono or diquaternary heterocycle of the formulae

and

an aromatic ammonium heterocycle of the formula

wherein R is selected from monovalent organic groups having up to 22 carbon atoms and optionally one or more heteroatoms, and wherein the free valencies at the nitrogen atoms are bound to carbon atoms, and T is selected from a divalent organic group having up to 20 carbon atoms and one or more hetero atoms.

7. The polyorganosiloxane compound according to claim 1 , wherein the terminal ester groups are selected from the group of:

—OC(O)—Z

—OS(O) 2 —Z

—OS(O 2 )O—Z

—OP(O)(O—Z)OH

—OP(O)(O—Z) 2

wherein Z is selected from monovalent organic residues having up to 40 carbon atoms, optionally comprising one or more hetero atoms.

8. The polyorganosiloxane compound according to claim 1 of the general formulas (Ia) and (lb):

M-Y—[—(N + R 2 -T-N + R 2 )—Y—] m —[—(NR 2 -A-E-A′-NR 2 )—Y—] k -M  (Ia)

M-Y—[—(N + R 2 -T-N + R 2 )—Y—] m —[—(N + R 2 2 -A-E-A′-N + R 2 2 )—Y—] k -M  (Ib)

wherein:

m is >0, preferred 0.01 to 100, more preferred 0.1 to 100, even more preferred 1 to 100, specifically 1 to 50, more specifically 1 to 20, even more specifically 1 to 10,

k is 0 or an average value of >0 to 50 preferred 1 to 20, more preferred 1 to 10,

M represents a terminal group, comprising terminal ester groups selected from

—OC(O)—Z

—OS(O) 2 —Z

—OS(O 2 )O—Z

—OP(O)(O—Z)OH

—OP(O)(O—Z) 2

wherein Z is selected from monovalent organic residues having up to 40 carbon atoms, optionally comprising one or more hetero atoms,

-A-E-A′-is such that A and A′ each are independently from each other selected from a single bond or a divalent organic group having up to 10 carbon atoms and one or more hetero atoms, and

E is a polyalkylene oxide group of the general formulae:

—[CH 2 CH 2 O] q —[CH 2 CH(CH 3 )O] r —[CH 2 CH(C 2 H 5 )O] s —

with

q=0 to 200,

r=0 to 200,

s=0 to 200

and q+r+s=1 to 600,

R 2 is selected from hydrogen or R, where R is selected from monovalent organic groups having up to 22 carbon atoms and optionally one or more heteroatoms

Y is a group of the formula:

—K—S—K— and -A-E-A′-or-A′-E-A-,

with

wherein R l =C 1 -C 22 -alkyl, C 1 -C 22 -fluoralkyl or aryl,

n=0 to 1000, and these can be identical or different if several S Groups are present in the polyorganosiloxane compound,

K= is a bivalent or trivalent straight chain, cyclic and/or branched C 2 -C 40 hydrocarbon residue which is optionally interrupted by —O—, —NH—, trivalent N,—NR 1 —, —C(O)—, —C(S)—, and optionally substituted with —OH, wherein R 1 is defined as above, whereby the residues K can be identical or different from each other, and

A, A′ and E are as defined above, and

T is selected from a divalent organic group having up to 20 carbon atoms and one or more hetero atoms.

9. The polyorganosiloxane compound according to claim 1 , having protonated ammonium groups.

10. A process for the manufacture of the polyorganosiloxane compound according to claim 1 , which comprises the reaction of

(i) at least one ditertiary diamine,

(ii) at least one amino-alkylating compound, comprising at least one diepoxide, and

(iii) at least one monofunctional organic acid,

wherein at least one compound among compounds (i) and (ii) comprises polyorganosiloxane structural units.

11. polyorganosiloxane compound as prepared by the process of claim 10 .

12. The polyorganosiloxane compound according to claim 1 , having a viscosity at 20° C. and a shear rate of 0.1 s −1 below 100000 mPa·s.

13. An aqueous emulsiores comprising at least one polyorganosiloxane compound as defined in claim 1 .

14. A method of surface treatment, comprising the step of applying the polyorganosiloxane compound as defined in claim 1 , to the surface of a substrate.

15. The method of claim 14 wherein the polyorganosiloxane compound is present as one of a following compositions or formulations respectively:

cosmetic formulations for skin and hair care, selected from Rinse-off and Leave-on conditioners, shampoos, styling gels, sprays, and pump sprays; formulations for polishing for the treatment and outfitting of hard surfaces; formulations for drying automobiles and other hard surfaces; formulations for initial outfitting of textiles and textile fibers; softener formulations comprising in addition non-ionogenic or anionic/non-ionogenic or cationic or betaine surfactants for application during or after washing textiles; laundry formulations for textile washes based upon non-ionic or anionic/non-ionic or cationic or betaine surfactants or formulations for preventing or reversing textile crumpling.

16. A polyorganosiloxane composition, comprising:

A) at least one polyorganosiloxane compound, comprising

a) at least one polyorganosiloxane group,

b) at least one quaternary ammonium group, and

c) at least one terminal ester group, wherein the polyorganosiloxane compound (A) is a linear copolymer compound which comprises the above functional groups (a) and (b) in at least two repeating units, with at least part of the terminal groups being terminal ester groups (c) that result from the use of monofunctional organic acids as chain stoppers, and

B) at least one polyorganosiloxane compound, comprising at least one terminal ester group, different from compound A).

17. The polyorganosiloxane composition according to claim 16 wherein the weight ratio of compound A) to compound B) is less than 90:10.

18. The polyorganosiloxane composition according to claim 16 wherein in compound A) the molar ratio of the quaternary ammonium groups b) and the terminal ester groups c) is less than 100:10.

19. A polyorganosiloxane compound consisting essentially of:

a) at least one polyorganosiloxane group,

b) at least one quaternary ammonium group, and

c) at least one terminal ester group,

wherein the polyorganosiloxane compound is a linear copolymer compound which comprises the above functional groups (a) and (b) in at least two repeating units, with at least part of the terminal groups being terminal ester groups (c) that result from the use of monofunctional organic acids as chain stoppers, and

wherein the molar ratio of the quaternary ammonium groups b) and the terminal ester groups c) is less than 100:15.

20. The polyorganosiloxane compound according to claim 19 , further consisting essentially of:

d) at least one polyalkylene oxide group.