Aqueous dispersions for textile finishing

• US 6,306,958 B1
• Filed: 12/16/1999
• Issued: 10/23/2001
• Est. Priority Date: 12/22/1998
• Status: Expired due to Term

• Current Assignee: Huntsman International LLC (Huntsman Corporation)
• Original Assignee: CIBA Specialty Chemicals
• Inventors: Rössler, Erich, Mosch, Franz, Schidek, Edeltraud, Lüdemann, Simpert, Artner, Wilhelm, Gaugenrieder, Heinz, Dirschl, Franz
• Primary Examiner(s): GORR, RACHEL F
• Application Number:
  US09/465,867
• Time in Patent Office: 677 Days
• Field of Search: 528/45, 528/73, 528/70, 524/839, 524/805, 811/56, 819/2, 811/564, 525/124, 525/452, 525/528
• US Class Current: 524/805
• CPC Class Codes: C08G 18/6279 containing fluorine atoms
• CPC Class Codes: C08G 18/6423 Polyalkylene polyamines; polyethylenimines; Derivatives thereof polyamides or polyesteramides C08G18/60
• CPC Class Codes: C08G 18/8029 Masked aromatic polyisocyanates
• CPC Class Codes: C08G 18/8077 Oximes
• CPC Class Codes: D06M 13/432 Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
• CPC Class Codes: D06M 15/277 containing fluorine
• CPC Class Codes: D06M 15/423 Amino-aldehyde resins
• CPC Class Codes: D06M 15/55 Epoxy resins
• CPC Class Codes: D06M 15/564 Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• CPC Class Codes: D06M 2200/11 Oleophobic properties
• CPC Class Codes: D06M 2200/12 Hydrophobic properties

Abstract

Aqueous dispersions comprising as component A) a compound containing two or more blocked isocyanate groups in the molecule and as component B) a compound obtainable by reacting a diepoxy compound with a diamine or polyamine and subsequently reacting the resulting reaction product with an acid and possibly as component C) a dispersant are suited together with fluorine containing oligomers or polymers for the oil-, water- and soil-repellent finishing of fiber materials.

Claims

1. An aqueous textile fabric treating dispersion comprising at least two components A) and B), component A) being a compound containing two or more blocked isocyanate groups in the molecule, wherein component B) is a product obtained by reacting a diepoxy compound of the formula (I)

2. An aqueous dispersion as claimed in claim 1, wherein the isocyanate groups of component A) have been blocked with a ketone oxime or mixture of ketone oximes.

3. An aqueous dispersion as claimed in claim 1, wherein c¹ and c²=0 and y=1.

4. An aqueous dispersion as claimed in claim 1, wherein E is an aliphatic radical of 2-6 carbon atoms or an aromatic radical of 6-18 carbon atoms.

5. An aqueous dispersion as claimed in claim 1, wherein z=1 and j=2-6.

6. An aqueous dispersion as claimed in claim 1, wherein the acid used for the reaction of the reaction product of a diepoxy compound of the formula (I) and of a diamine or polyamine of the formula (II) with an acid is an organic acid or a strong inorganic acid.

7. An aqueous dispersion as claimed in claim 1, obtained by jointly dispersing components A) and B) and, optionally, homogenizing the resulting dispersion.

8. An aqueous dispersion as claimed in claim 1, which comprises components A) and B) in a weight ratio of from 100:

2.5 to 100;

30.

9. An aqueous dispersion as claimed in claim 1, further comprising one or more dispersants as component C).

10. A method for the oil, water and dirt repellent finishing of fiber materials, which comprises applying thereto an effective amount of an aqueous dispersion as claimed in claim 1.

11. An aqueous dispersion as claimed in claim 9, which comprises components A) and C) in a weight ratio of from 100:

1 to 100;

20.

12. An aqueous dispersion as claimed in claim 1, further comprising an oligomer, homopolymer or copolymer containing perfluoroalkyl radicals as component D).

13. An aqueous dispersion as claimed in claim 12, wherein the copolymer containing perfluoroalkyl radicals present as component D) is composed essentially of a monomer a):

and one or more of the monomers b) and c);

where the radicals and indices indicated have independently of one another the following definitions;

A is a linear or branched divalent radical of the formula —

C_nH_2n—

, —

C_nH<sub>2n−

2</sub>—

or —

S(O₂)—

NR³—

C_mH_2m—

, the sulfur atom being attached to R_f

R_f is a perfluoroalkyl radical of 4-20 carbon atoms

R¹ is a hydrogen or methyl

R² is a linear alkyl or alkenyl radical of 1-24 carbon atoms

R³ is hydrogen or a linear or branched alkyl group of 1-6 carbon atoms

m=2-4

n=1-4.

14. An aqueous dispersion as claimed in claim 12, which comprises components A) and D) in a weight ratio of 100:

40 to 100;

1500.

15. A process for preparing an aqueous dispersion as claimed in claim 9, which comprises jointly dispersing components A), B) and C and, optionally, homogenizing the resulting dispersion and, after the homogenization optionally adding to the dispersion an oligomer, homopolymer or copolymer containing perfluoroalkyl radicals, optionally in the form of an aqueous dispersion.

16. The method as claimed in claim 10, wherein the fiber materials comprise woven or knitted textile sheetlike structures.

17. The method as claimed in claim 10, wherein the fiber materials comprise natural or regenerated cellulose, fibers of animal origin, synthetic organic fibers, or mixtures thereof.

18. An aqueous dispersion as claimed in claim 4, wherein E is the radical p—

C₆H₄—

(CH₃)C(CH₃)—

p—

C₆H₄—

.

19. An aqueous dispersion as claimed in claim 9, wherein the dispersion comprises at least one nonionic, cationic or pseudocationic dispersant of the formula (III) or (IV)