Water-based composition of amino-functional silicon compounds

• US 6,534,667 B1
• Filed: 02/28/2000
• Issued: 03/18/2003
• Est. Priority Date: 02/27/1999
• Status: Expired due to Term

• Current Assignee: Evonik Degussa GmbH
• Original Assignee: Degussa AG (Rag-Stiftung)
• Inventors: Laven, Ralf, Switalla, Günter, Mack, Helmut, Jenkner, Peter, Edelmann, Roland, Monkiewicz, Jaroslaw, Standke, Burkhard, Horn, Michael, Frings, Albert-Johannes
• Primary Examiner(s): Shaver, Paul F.
• Application Number:
  US09/514,356
• Time in Patent Office: 1,114 Days
• Field of Search: 556/413, 427/331, 106/287.11
• US Class Current: 556/413
• CPC Class Codes: C08K 5/5445 containing at least one Si-N bond
• CPC Class Codes: C08K 5/549 containing silicon in a ring
• CPC Class Codes: C08L 2666/34 Oxygen-containing compounds, including ammonium and metal salts
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: C09D 183/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• CPC Class Codes: C23C 2222/20 Use of solutions containing silanes

Abstract

A composition which comprises a mixture of water-soluble, amino-functional silicon compounds which are essentially free from alkoxy groups, water, optionally a content of alcohol and optionally a content of acid, the composition comprising silicon compounds of the general formula I:

NH₂[CH₂)₂NH]_x(CH₂)₃SiO_1.5  (I)

in which x is 0, 1 or 2,

and of the general formula II:

(SiO_1.5(CH₂)₃[NH(CH₂)₂]_yNH[(CH₂)₂NH]_x(CH₂)₃Si)_1.5  (II)

in which y and z are 0, 1 or 2 and are identical or different.

The compositions are obtainable by mixing corresponding aminoalkoxy silanes, hydrolyzing the mixture and removing the hydrolysis alcohol formed as a result. The invention furthermore relates to a process for the preparation of the compositions and to their use in a wide variety of applications.

Claims

1. A composition, which comprises a mixture of

(a) water-soluble, amino-functional silicon compounds which are essentially free from alkoxy groups represented by the formula (I) and (II):

2. The composition of claim 1, further comprising at least one alcohol.

3. The composition of claim 1, further comprising at least one acid.

4. The composition of claim 1, further comprising at least one alcohol and at least one acid.

5. The composition of claim 1, which has an alcohol content of less than 5% by weight.

6. The composition of claim 1, which has a pH of less than 11.

7. The composition of claim 1, which has a content of silicon compounds of less than 60% by weight.

8. The composition of claim 1, wherein the weight ratio of the silicon compounds represented by formula (I) and formula (II), (I)/(II), is ≧

1.

9. The composition of claim 1, which comprises the silicon compounds represented by formula (I) and (II), including the silanols and siloxanes in each case in equilibrium thereto.

10. A process for the preparation of a composition which comprises a mixture of water-soluble, amino-functional silicon compounds which are essentially free from alkoxy groups, water, optionally a content of alcohol and optionally a content of acid, which comprises

mixing at least one amino silane represented by formula (III):

11. The process of claim 10, wherein the amino silanes represented by formula (III) and (IV) are mixed in a weight ratio, (III)/(IV), of ≧

1.

12. The process of claim 10, wherein the hydrolysis is carried out at a temperature of <

100°

C.

13. The process of claim 10, wherein the hydrolysis is carried out at a pH of 4 to 12.

14. The process of claim 10, wherein at least one Brö

nsted acid is added as the acid.

15. The process of claim 10, wherein the concentration of the alcohol produced during the hydrolysis is lowered by distillation.

16. The process of claim 10, wherein the pH of the composition is brought to a value of <

11.

17. A composition obtainable according to the process of claim 10.

18. A method of treating a surface, comprising applying the composition of claim 1 to the surface.

19. A method according to claim 18, wherein said composition is used as a water-soluble adhesion promoter.

20. A method according to claim 18, wherein said composition is used as a constituent in a coating system.

21. A method according to claim 18, wherein said composition is used as a constituent in an anticorrosion system.

22. A method according to claim 18, wherein said composition is used in the biocidal treatment of surfaces.

23. A method according to claim 18, wherein said composition is used in the treatment of wood.

24. A method according to claim 18, wherein said composition is used in the treatment of an electrophotographic toner.

25. A method according to claim 18, wherein said composition is used as a constituent in epoxy, UP or acrylic resins.

26. A method according to claim 18, wherein said composition is used for the modification of surfaces of glass.

27. A method according to claim 18, wherein said composition is used for the surface modification and treatment of pigments.

28. A method according to claim 18, wherein said composition is used for increasing the strength of plate, hollow or laminated glass.

29. A method according to claim 18, wherein said composition is used as an adhesion promoter for a UV-crosslinking polymer.