Solution, in particular for pretreating a hydrophilic subsurface in order to improve an adhesive bond under humid and wet conditions

• US 8,932,396 B2
• Filed: 01/22/2010
• Issued: 01/13/2015
• Est. Priority Date: 02/06/2009
• Status: Active Grant

• Current Assignee: Tesa SE (Maxingvest AG)
• Original Assignee: Tesa SE (Maxingvest AG)
• Inventors: Krawinkel, Thorsten
• Primary Examiner(s): Brunsman, David M
• Application Number:
  US13/148,109
• Publication Number:
  US 20110315048A1
• Time in Patent Office: 1,817 Days
• Field of Search: 106/287.11, 106/287.12, 106/287.13, 106/187.15, 106/287.14
• US Class Current: 106/287.11
• CPC Class Codes: C09J 2483/003 in the primer coating
• CPC Class Codes: C09J 5/02 involving pretreatment of the surfaces to be joined
• CPC Class Codes: C09K 3/18 for application to surfaces to minimize adherence of ice, mist or water thereto rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30; Thawing or antifreeze materials for application to surfaces used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00

Abstract

The invention relates to a solution, in particular for pre-treating a hydrophilic surface for hydrophobization, comprising: I. at least one silane of the formula (1) where R¹, R², R³ independently of one another are selected from the group consisting of methyl, ethyl, 2-methoxyethyl, propyl and i-propyl, butyl, benzyl m=0 or 1, n=3 to 12, p=1 or 2, and, for p=1, Y=a functional group selected from the group consisting of (meth)alkyl, (meth)acryloxy, mercapto, ureido, —NH—CH2—CH2-NR⁴R⁵ and —NR⁴R⁵ (where R⁴ and R⁵ independently of one another are selected from the group consisting of H, alkyl, phenyl, benzyl, cycloalkyl), or, for p=2, Y=NH; and II. at least one second silane increasing the aging stability having no more than two carbon atoms bound to the silicon in a chain.

Claims

1. A solution particularly for the pretreatment of a hydrophilic surface for hydrophobizing, comprising

(i) a first silane having the formula

2. The solution of claim 1, wherein the silanes are in solution in a nonprotic solvent or in a solvent mixture in which a nonprotic solvent is present at not less than 30% by weight.

3. The solution of claim 2 wherein the silanes in total are present in a concentration of 0.01% to 8% by weight in the solvent or solvent mixture.

4. The solution of claim 2 wherein the solvent is composed at least to an extent of 30% by weight of carboxylic esters.

5. The solution of claim 2 wherein the solvent possesses a boiling point between 35°

C. and 180°

C.

6. The solution of claim 1 wherein the ratio between the second silane and the third silane is 1:

2 to 4;

1.

7. The solution of claim 1 wherein the solution is present in the form of a pump spray or an aerosol.

8. The solution of claim 1 wherein the solution is dispensed into sealed-edge pouches containing a nonwoven or woven material or a sponge.

9. The solution of claim 1 wherein the solution is dispensed into containers containing a reservoir and an applicator and can be applied contactlessly.

10. The solution of claim 8 wherein the solution is located in a pack into which a nonwoven material or a sponge have been integrated such that they are located on the free surface of the pack, the solution separate from the nonwoven material or from the sponge as a result of a severable membrane, or which is enclosed by an envelope and in this way is separate from the nonwoven material or sponge.