Hydrophilic coating lacquer

• US 20080302274A1
• Filed: 07/06/2007
• Published: 12/11/2008
• Est. Priority Date: 06/07/2007
• Status: Abandoned Application

• Current Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Original Assignee: Tesa AG (maxingvest GmbH & Co. KGaA)
• Inventors: NEUBERT, INGO, KLOSE, MAREN
• Application Number:
  US11/774,061
• Publication Number:
  US 20080302274A1
• Time in Patent Office: Days
• US Class Current: 106/287.25
• CPC Class Codes: C08K 5/42 Sulfonic acids; Derivatives thereof
• CPC Class Codes: C09D 7/47 Levelling agents
• CPC Class Codes: G01N 33/54393 Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding

Abstract

Coating lacquer in particular for use in biosensors and diagnostic strips composed of

• • at least one surfactant substance with
    • a critical micelle-formation concentration (CMC, 25° C.) of at most 2.3 g/L and
    • a surface tension (25° C.) of its 0.1% strength by weight aqueous solution of at most 50 mN/M,
  • at least one solvent,
  • at least one binder and also
  • if appropriate, further additives,
  • where the surface obtained after drying of the coating lacquer has
    • a contact angle with water of at most 30° and
    • a surface tension of at least 60 mN/m.

Claims

1. Coating lacquer composed of at least on surfactant substance with

a critical micelle-formation concentration (CMC, 25°

C.) of at most 2.3 g/L and

a surface tension (25°

C.) of its 0.1% strength by weight aqueous solution of at most 50 mN/m,

at least one solvent,

at least on binder and also

further additives,

where the surface obtained after drying of the coating lacquer has

a contact angle with water of at most 30°

C. and

a surface tension of at least 60 mN/m.

2. Coating lacquer according to claim 1, the surfactant substance has a critical micelle-formation concentration (CMC, 25°

) of at most 1.5 g/L and/or a surface tension of its 0.1% strength by weight aqueous solution of at most 45 mN/m.

3. Coating lacquer according to claim 1 surfactant substance is an anionic surfactant.

4. Coating lacquer according to claim 1, wherein solvents used comprise at least one polar solvent.

5. Coating lacquer according to claim 1, wherein binders used comprise at least one polymer or one copolymer having carboxy, carboxylate, amine, ammonium, amide or alcohol functionalities.

6. Coating lacquer according to claim 1, wherein the binder has been selected from the group of polyvinyl alcohol, polyvinyl butyral, polyester resin, maleate resin or cellulose derivative.

7. Coating lacquer according to claim 1, wherein the coating lacquer has a viscosity of from 50 to 500 mPa*s, prior to drying.

8. Coating lacquer according to claim 1, wherein the surface obtained after drying of the coating lacquer has

a contact angle with water of at most 23°

and

a surface tension of at least 65 mN/m.

9. Coating lacquer according to claim 1, wherein the transport velocity of an aqueous test liquid (deionized water and 1% by weight of naphthol red) in a channel (75 μ

m×

1 mm) in which the dried coating lacquer forms a wall of the channel amounts to at least 20 mm/s.

10. Coating lacquer according to claim 1, wherein the transport velocity of an aqueous test liquid (deionized water and 1% by weight of naphthol red) in a channel (75 μ

m×

1 mm) in which the dried coating lacquer forms a wall of the channel slows by at most 20% of the initial value after storage for 10 weeks at 70°

C.

11. Coating lacquer according to claim 1, wherein the coating lacquer is applied by means of a printing process to a substrate material.

12. Diagnostic strips, biosenors, point-or care devices or microfluidic devices comprising dried coating lacquer according to claim 1.

13. Biosensors or analytical test strips comprising a dried coating lacquer according to claim 1, where the arrangement of the material is such that the coating at least partially forms at least one wall of a transport channel or reaction channel.