Hydrophobically modified cationic acrylate copolymer/polysiloxane blends and use in tissue

1. A soft tissue sheet comprising papermaking fibers and a polysiloxane composition wherein the polysiloxane composition comprises an amino-functional polysiloxane and a compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less.

2. The soft tissue sheet of claim 1 , wherein the synthetic resin binder is a synthetic co-copolymer, the synthetic co-polymer having the general structure:

wherein:

each R 1 , R 2 , R 3 comprise independently a: H; C 1-4 alkyl radicals; or, mixtures thereof;

R 4 comprises a C 1 -C 8 alkyl radical or mixtures thereof;

Z 1 comprises a bridging radical attaching the R 4 functionality to the polymer backbone;

Q 1 comprises a functional group comprising at least a cationic quaternary ammonium radical,

Q 2 comprises a non-ionic hydrophilic monomer, a water-soluble monomer or mixtures thereof;

w, x, y≧1,z≧0; and

the mole ratio of z to x is from about 0:1 to about 4:1.

3. A soft tissue sheet comprising papermaking fibers and a polysiloxane composition wherein the polysiloxane composition comprises a polysiloxane and a compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less, wherein the polysiloxane has the general structure of:

wherein:

each R 1 -R 8 moiety comprises independently a C 1 or higher of alkyl group, aryl group, polyester,

amine, imine, amide or mixtures thereof; and

y is an integer greater than 1.

4. The soft tissue sheet of claim 1 , wherein the polysiloxane has the general structure of:

wherein:

x and y are integers >0;

the mole ratio of x to (x+y) is from about 0.005 percent to about 25 percent;

each R 1-R 9 moiety comprises independenty an organofunctional group or mixtures thereof; and,

R 10 comprises an amino functional moiety or mixtures thereof.

5. The soft tissue sheet of claim 4 , wherein each R 1 -R 9 moiety comprises independently a C 1 or higher of alkyl group, aryl group, ether, polyether, polyester, amide, or mixtures thereof.

6. The soft tissue sheet of claim 1 , wherein the polysiloxane has the general structure of:

wherein:

x and z are integers >0;

y is an integer ≧0;

the mole ratio of x to (x+y+z) is from about 0.05 percent to about 95 percent;

the mole ratio of y to (x+y+z) is from about 0 percent to about 25 percent;

each R 0 -R 9 comprises independently an organofunctional group or mixtures thereof;

R 10 comprises an amino functional moiety or mixtures thereof; and,

R 11 comprises a hydrophilic functionality or mixtures thereof.

7. The soft tissue sheet of claim 6 , wherein each R 0 -R 9 moiety comprises independently a C 1 or higher of alkyl group, aryl group, ether, polyether, polyester, amine, imine, amide, substituted amide, or mixtures thereof.

8. The tissue product of claim 6 , wherein R 10 comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

9. The tissue product of claim 6 , wherein R 11 comprises a polyether functional group having the formula: —R 12 —(R 13 —O) a —(R 14 O) b —R 15

wherein:

each R 12 , R 13 , and R 14 comprises independently branched C 1-4 alkyl groups, linear C 1-4 alkyl groups, or mixtures thereof;

R 15 comprises H, C 1-30 alkyl group, or mixtures thereof; and,

a and b are integers of from about 1 to about 100.

10. The soft tissue sheet of claim 2 , wherein the mole ratio of (x+z) to y is from about 0.98:0.02 to about 1:1.

11. The soft tissue sheet of claim 2 , wherein Z 1 comprises a: —O—; —COO—; —OOC—; —CONH—; —NHCO—; or, mixtures thereof.

12. The soft tissue sheet of claim 2 , wherein R 1 is H, R 2 is H, R 3 is a: H, —CH 3 or mixtures thereof, and R 4 is a: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; or, mixtures thereof.

13. The soft tissue sheet of claim 2 , wherein Q 1 is derived from monomers selected from the group: [2-(methacryloyloxy)ethyl]trimethylammonium methosulfate; [2-(methacryloyloxy)ethyl]trimethylammonium ethosulfate; dimethyldiallyl ammonium chloride; 3-acryloamido-3-methyl butyl trimethyl ammonium chloride; trimethylamino methacrylate; vinyl benzyl trimethyl ammonium chloride; 2-[(acryloyloxy)ethyl]trimethylammonium chloride; [2-(methacryloyloxy)ethyl]trimethylammonium chloride; and, mixtures thereof.

14. The soft tissue sheet of claim 1 , wherein the amount of the compatible synthetic co-polymer is from about 2 to about 90 weight percent of the polysiloxane on a dry solids basis.

15. The soft tissue sheet of claim 1 , wherein the amount of the compatible synthetic co-polymer is from about 5 to about 75 weight percent of the polysiloxane on a dry solids basis.

16. The soft tissue sheet of claim 1 , wherein the amount of the compatible synthetic co-polymer is from about 10 to about 50 weight percent of the polysiloxane on a dry solids basis.

17. The soft tissue sheet of claim 1 , wherein the soft tissue sheet has a basis weight of about 5 to about 150 g/m 2 and a bulk of about 2 cm 3 /g or greater.

18. The soft tissue sheet of claim 1 , wherein the compatible synthetic co-polymer is water dispersible.

19. The soft tissue sheet of claim 1 , wherein the compatible synthetic co-polymer is water soluble.

20. The soft tissue sheet of claim 1 , wherein the compatible synthetic co-polymer is derived from a solution polymerization process and is delivered to the tissue sheet as an aqueous dispersion of solution.

21. A polysiloxane composition suitable for treating a tissue sheet containing papermaking fibers, said polysiloxane composition comprising an amino-functional polysiloxane and a compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less.

22. The polysiloxane composition of claim 21 , wherein the polysiloxane composition comprises an aqueous dispersion or emulsion of the amino-functional polysiloxane and the compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less.

23. The polysiloxane composition of claim 21 , wherein the polysiloxane composition comprises a blend of an aqueous amino-functional polysiloxane emulsion and an aqueous dispersion of the compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less.

24. The polysiloxane composition of claim 21 , wherein the polysiloxane composition comprises a blend of an aqueous amino-functional polysiloxane emulsion and an aqueous emulsion of the compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less.

25. The polysiloxane composition of claim 21 , wherein the compatible cationic synthetic resin binder has the general structure:

wherein:

each R 1 , R 2 , R 3 comprise independently a: H; C 1-4 alkyl radicals; or, mixtures thereof;

R 4 comprises a C 1 -C 8 alkyl radical or mixtures thereof;

Z 1 comprises a bridging radical attaching the R 4 functionality to the polymer backbone;

Q 1 comprises a functional group comprising at least a cationic quaternary ammonium radical;

Q 2 comprises a non-ionic hydrophilic monomer, a water soluble monomer or mixtures thereof;

wherein w, x, y≧1, z≧0; and

the mole ratio of z to x is from about 0:1 to about 4:1.

26. A polysiloxane composition suitable for treating a tissue sheet containing papermaking fibers, said polysiloxane composition comprising a polysiloxane and a compatible cationic synthetic resin binder having a glass transition temperature of about 100° C. or less, wherein the polysiloxane has the general structure of:

wherein:

each R 1 -R 8 moiety comprises independently a C 1 or higher of alkyl group, aryl group, polyester, amine, imine, amide or mixtures thereof; and

y is an integer greater than 1.

27. The polysiloxane composition of claim 21 , wherein the polysiloxane has the general structure of:

wherein:

x and y are integers 0;

the mole ratio of x to (x+y) is from about 0.005 percent to about 25 percent;

each R 1 -R 9 moiety comprises independently an organo-functional group or mixtures thereof; and,

R 10 comprises an amino functional moiety or mixtures thereof.

28. The polysiloxane composition or claim 27 , wherein each R 1 -R 9 moiety comprises independently a C 1 or higher of alkyl group, aryl group, ether, polyether, polyester, amide, or mixtures thereof.

29. The polysiloxane composition of claim 21 , wherein the polysiloxane has the general structure of:

wherein:

x and z are integers >0;

y is an integer ≧0;

the mole ratio of x to (x+y+z) is from about 0.05 percent to about 95 percent;

the mole ratio of y to (x+y+z) is from about 0 percent to about 25 percent;

each R 0 -R 9 comprises independently an organofunctional group or mixtures thereof;

R 10 comprises an amino functional moiety or mixtures thereof; and,

R 11 comprises a hydrophilic functionality or mixtures thereof.

30. The polysiloxane composition of claim 29 , wherein each R 0 -R 9 moiety comprises independently a C 1 or higher of alkyl group, aryl group, ether, polyether, polyester, amine, imine, amide, substituted amide, or mixtures thereof.

31. The polysiloxane composition of claim 29 , wherein R 10 comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

32. The polysiloxane composition of claim 29 , wherein R 11 comprises a polyether functional group having the formula: —R 12 —(R 18 —O) a —(R 14 O) b —R 15

wherein:

each R 12 , R 13 , and R 14 comprises independently branched C 1-4 alkyl groups, linear C 1-4 alkyl groups, or mixtures thereof;

R 15 comprises H, C 1-30 , alkyl group, or mixtures thereof; and,

a and b are integers of from about 1 to about 100.

33. The polysiloxane composition of claim 25 , wherein the mole ratio of (x+z) to y of the compatible synthetic resin binder is from about 0.98:0.02 to about 1:1.

34. The polysiloxane composition of claim 25 , wherein Z 1 comprises a: —O—; —COO—; —OOC—; —CONH—; —NHCO—; or, mixtures thereof.

35. The polysiloxane composition of claim 25 , wherein R 1 is H, R 2 is H, R 3 is a: H, —CH 3 or mixtures thereof, and R 4 is a: methyl radicals; ethyl radicals; propyl radicals; butyl radicals; or, mixtures thereof.

36. The polysiloxane composition claim 25 , wherein Q 1 of the compatible synthetic resin binder is derived from monomers selected from the group: [2-(methacryloyloxy)ethyl]trimethylammonium methosulfate; [2-(methacryloyloxy)ethyl]trimethylammonium ethosulfate; dimethyldiallyl ammonium chloride; 3-acryloamido-3-methyl butyl trimethyl ammonium chloride; trimethylamino methacrylate; vinyl benzyl trimethyl ammonium chloride; 2-[(acryloyloxy)ethyl]trimethylammonium chloride; [2-(methacryloyloxy)ethyl ]trimethylammonium chloride; and, mixtures thereof.

37. The polysiloxane composition of claim 21 , wherein the amount of the compatible synthetic co-polymer is from about 2 to about 90 weight percent of the polysiloxane on a dry solids basis.

38. The polysiloxane composition of claim 21 , wherein the amount of the compatible synthetic co-polymer is from about 5 to about 75 weight percent of the polysiloxane on a dry solids basis.

39. The polysiloxane composition of claim 21 , wherein the amount of the compatible synthetic co-polymer is from about 10 to about 50 weight percent of the polysiloxane on a dry solids basis.

40. The polysiloxane composition of claim 21 , wherein the compatible synthetic resin binder has an average weight average molecular weight between about 10,000 to about 5,000,000.

41. The polysiloxane composition of claim 21 , wherein the compatible synthetic resin binder is water dispersible or water soluble.

42. The polysiloxane composition of claim 25 , wherein Q 2 is derived from monomers selected from the group of: hydroxyalkyl acrylates; hydroxyalkyl methacrylates; hydroxyethyl acrylate; polyalkoxyl acrylates; polyalkoxyl methacrylates; diacetone acrylamide; N-vinylpyrrolidinone; N-vinylformamide; and, mixtures thereof.

43. The polysiloxane composition of claim 25 , wherein Q 1 is derived from monomers selected from the group: [2-(methacryloyloxy) ethyl ]trimethylammonium methosulfate; [2-(methacryloyloxy)ethyl ]trimethylammonium ethosulfate; dimethyidiallyl ammonium chloride; 3-acryloamido-3-methyl butyl trimethyl ammonium chloride; trimethylamino methacrylate; vinyl benzyl trimethyl ammonium chloride; 2-[(acryloyloxy)ethyl]trimethylammonium chloride; [2-(methacryloyloxy)ethyl ]trimethylammonium chloride; and, mixtures thereof.

44. The polysiloxane composition of claim 42 , wherein the polyalkoxyl acrylate is a polyethyleneglycol acrylate.

45. The polysiloxane composition of claim 42 , wherein the polyalkoxyl methacrylate is a polyethyleneglycol methacrylate.

46. The soft tissue sheet of claim 1 , wherein the polysiloxane composition has a film modulus of about 0.5 MPa or less.

47. The polysiloxane composition of claim 21 , wherein the polysiloxane composition has a film modulus of about 0.5 MPa or less.

48. The soft tissue sheet of claim 1 , wherein the compatible cationic synthetic resin binder has a glass transition temperature about 40° C. or less.

49. The polysiloxane composition of claim 21 , wherein the compatible cationic synthetic resin binder has a glass transition temperature about 40° C. or less.