Primer solution for improving the adhesion of adhesive strips on hydrophilic surfaces in moist and wet conditions

Patent metadata

Field	Value
Publication number	US-11279854-B2
Application number	US-201615753467-A
Country	US
Kind code	B2
Filing date	Aug 18, 2016
Priority date	Aug 20, 2015
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

The invention relates to a solution in particular for the pre-treatment of a surface, containing, preferably consisting of: I) at least one first silane of formula (I) with R1, R2, R3 independently selected from the groups methyl, ethyl, 2 methoxyethyl, propyl, i-propyl, butyl, benzyl, wherein m=0 or 1, n=3 to 12, p=1 or 2, and for p=1, Y=a functional group selected from the groups (meth)acryl, (meth)acryloxy, mercapto, ureido, —NH—CH2—CH2—NR4R5, —NR4R5 (with R4 and R5 independently selected from the groups H, alkyl, phenyl, benzyl, cycloalkyl), or for p=2, Y=NH; II) at least one second silane of formula (II) with R1, R2, R3 independently selected from the groups methyl, ethyl, 2 methoxyethyl, propyl, i-propyl, butyl, benzyl, wherein m=0 or 1, R8=H, alkyl, phenyl, benzyl or cycloalkyl; III) at least one alcohol; and IV) water.

First claim

The invention claimed is:

1. A solution comprising:
a hydrolysate of a first silane selected from the group consisting of a hydrolysate of 3-aminopropyltrimethoxysilane and a hydrolysate of 3-aminopropyltriethoxysilane;
a hydrolysate of a second silane selected from the group consisting of a hydrolysate of vinyltrimethoxysilane and a hydrolysate of vinyltriethoxysilane;
isopropanol; and
water,

wherein:
the solution comprises no hydrolysates of silanes in addition to the hydrolysate of the first silane and the hydrolysate of the second silane;
the hydrolysate of the first silane and the hydrolysate of the second silane are present in a total concentration of 0.1 to 1 percent by weight of the solution;
the hydrolysate of the second silane is present at a 2.0- to 6.0-fold weight concentration compared to the hydrolysate of the first silane; and
the water is present at greater than 5.0 percent but less than 30.0 percent by weight of the solution.

2. The solution as claimed in claim 1 , wherein the isopropanol is present at 72 to 94.94 percent by weight of the solution.

3. The solution as claimed in claim 1 , wherein the water is distilled or fully-demineralized water.

4. The solution as claimed in claim 1 , wherein the solution has been dispensed into a pump spray or an aerosol.

5. The solution as claimed in claim 1 , wherein the solution has been dispensed into a sealed-edge pouch comprising a nonwoven web, a woven fabric, or a sponge.

6. The solution as claimed in claim 1 , wherein:
the solution has been dispensed into a container comprising a reservoir and an applicator; and
the solution is capable of being applied contactlessly.

7. The solution as claimed in claim 1 , wherein the solution is located in a pack into which a nonwoven web, a woven fabric, or a sponge is integrated such that the nonwoven web, the woven fabric, or the sponge is located on a free surface of the pack, the solution being:
separated from the nonwoven web, the woven fabric, or the sponge by a severable membrane, or
surrounded by an envelope and thus separated from the nonwoven web, the woven fabric, or the sponge.

8. A method comprising applying the solution as claimed in claim 1 to a hydrophilic surface.

9. A method comprising:
applying the solution as claimed in claim 1 to a hydrophilic surface; and
bonding a sheet of an adhesive to the hydrophilic surface,

wherein:
the hydrophilic surface can be repartitioned without damage;
the sheet of an adhesive comprises an adhesive based on polymers and/or copolymers of synthetic rubber and/or natural rubber;
the hydrophilic surface comprises a bond plane having a direction; and
the repartitioning without damage can be accomplished by pulling in the direction of the bond plane.

10. A kit comprising a solution as claimed in claim 1 and an adhesive sheet, wherein:
the adhesive sheet can be repartitioned without damage;
the adhesive is based on polymers and/or copolymers of synthetic rubber and/or natural rubber;
the adhesive sheet comprises a bond plane having a direction; and
the repartitioning without damage can be accomplished by pulling in the direction of the bond plane.

11. The solution as claimed in claim 1 , consisting of the hydrolysate of the first silane, the hydrolysate of the second silane, the isopropanol, and the water.

12. The solution as claimed in claim 1 , wherein the water is present at greater than 6 percent but less than 20 percent by weight of the solution.

13. The solution as claimed in claim 1 , wherein the water is present at greater than 7 percent but less than 10 percent by weight of the solution.

14. The solution as claimed in claim 1 , which exhibits the following property: after pretreating a damp surface by applying the solution to said damp surface, a repartable adhesive strip adheres to a damp surface as a result of the pretreating for a longer period of time than if the damp surface had not been subjected to said pretreating.

15. A solution consisting of:
a hydrolysate of a first silane selected from the group consisting of a hydrolysate of 3-aminopropyltrimethoxysilane and a hydrolysate of 3-aminopropyltriethoxysilane;
a hydrolysate of a second silane selected from the group consisting of a hydrolysate of vinyltrimethoxysilane and a hydrolysate of vinyltriethoxysilane;
isopropanol; and
water,

wherein:
the hydrolysate of the first silane and the hydrolysate of the second silane are present in a total concentration of 0.05 to 5 percent by weight of the solution and the hydrolysate of the second silane is present at a 3.0- to 6.0-fold weight concentration compared to the hydrolysate of the first silane.

Assignees

• Tesa Se

Inventors

• Dietze Sebastian
• Schümann Uwe
• Altenwegner Tanja
• Seibel Eugenia

Classifications

• C09J2483/003

  in the primer coating · CPC title

• C09J5/02 Primary

  involving pretreatment of the surfaces to be joined · CPC title

• C03C17/30

  with silicon-containing compounds · CPC title

• C03C2217/76

  Hydrophobic and oleophobic coatings · CPC title