Conductive Adhesive For A Floorcovering

• US 20130199699A1
• Filed: 03/31/2011
• Published: 08/08/2013
• Est. Priority Date: 04/08/2010
• Status: Abandoned Application

• Current Assignee: Construction Research & Technology GmbH (BASF SE)
• Original Assignee: Construction Research & Technology GmbH (BASF SE)
• Inventors: Huf, Alfred, Ernst, Gunnar
• Application Number:
  US13/637,783
• Publication Number:
  US 20130199699A1
• Time in Patent Office: Days
• US Class Current: 156/71
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08L 101/04 containing halogen atoms
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 33/20 Homopolymers or copolymers of acrylonitrile C08L55/02 takes precedence
• CPC Class Codes: C09J 175/06 from polyesters
• CPC Class Codes: C09J 9/02 Electrically-conducting adhesives
• CPC Class Codes: E04F 13/00 Coverings or linings, e.g. for walls or ceilings flooring E04F15/00; decoration of surfaces, mosaic work B44, e.g. paper-hanging B44C7/00; made of webs, e.g. of fabrics or wallpaper , as such, or their manufacturing D03D, D04G, D04H, D06N, D21H; construction of false ceilings E04B9/00; roofings or similar water-tight coverings against precipitation E04D
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon

Abstract

The invention relates to an adhesive for a floorcovering, comprising, based on the entire adhesive, from 5 to 30% by weight of at least one component selected from graphite and carbon black and/or from 0.2 to 3% by weight of conductive carbon fibers, from 25 to 50% by weight of a polyurethane dispersion with solids content of from 25 to 65% by weight, where less than 5% by weight of an aqueous dispersion of polyhydroxyether polymer, grafted with at least one acrylic or methacrylic monomer, with solids content of from 25 to 40% by weight, is present.

Claims

1. Adhesive for a floorcovering, comprising, based on the entire adhesive,

from 5 to 30% by weight of at least one component selected from graphite and carbon black and/or from 0.2 to 3% by weight of conductive carbon fibres,

from 25 to 50% by weight of a polyurethane dispersion with solids content of from 25 to 65% by weight,

where less than 5% by weight of an aqueous dispersion of polyhydroxyether polymer, grafted with at least one acrylic or methacrylic monomer, with solids content of from 25 to 40% by weight, is present.

2. Adhesive according to claim 1, wherein the polyurethane dispersion comprises polyester polyurethane, polyether polyurethane or acrylate polyurethane or a mixture thereof.

3. Adhesive according to claim 1, wherein the adhesive comprises graphite with an average particle diameter of from 10 to 70 μ

m.

4. Adhesive according to claim 1, wherein the leak resistance thereof is less than 3×

10⁵ ohms, measured to EN 13415, where the test specimen is stored for 10 days at 50°

C. and for one day at 20°

C. prior to the test.

5. Adhesive according to claim 1, comprising, based on the entire adhesive, from 1 to 20% by weight of a further polymer dispersion comprising polymers of:

C₁-C₂₀-alkyl(meth)acrylates, vinyl esters of carboxylic acids, where these acids comprise from 1 to 20 carbon atoms, vinylaromatics having from 1 to 20 carbon atoms, ethylenically unsaturated nitriles, vinyl halides, non-aromatic hydrocarbons having at least 2 conjugated double bonds, or a mixture of the said monomers, and the polymers can comprise, based on solids content, from 0 to 40% by weight of further monomers, optionally monomers having functional groups.

6. Adhesive according to claim 5, wherein the glass transition temperature of the polymer of the further polymer dispersion is from −

50 to 20°

C.

7. Adhesive according to claim 1, comprising no plasticizers.

8. Adhesive according to claim 1, comprising at least one filler from the group of chalk, quartz sand, powdered quartz, calcite, dolomite, talc, kaolin, mica, baryte and powdered pumice.

9. Adhesive according to claim 1, comprising from 10 to 200 parts by weight of fillers, based on 100 parts by weight of polymer.

10. Adhesive according to claim 1, wherein the content of organic compounds with boiling point below 300°

C. (1 bar), based on the entire adhesive, is smaller than 0.5% by weight.

11. Adhesive according to claim 1, wherein at least one further component is present from the group of auxiliaries, additives, thickeners, antifoams, dispersing agents, emulsifiers, tackifiers, preservatives, light stabilizers, antioxidants, flame retardants and biocides.

12. Adhesive according to claim 1, wherein the water content, based on the entire adhesive, is from 7 to 50% by weight.

15. A method of adhesive bonding a floorcovering on a substrate comprising applying the adhesive of claim 1 to the substrate and laying the floorcovering onto the adhesive.

16. The method of claim 15 wherein the floorcovering comprises PVC or a rubbery material.

17. The method of claim 16 wherein the substrate is an absorbent substrate.

18. The method of claim 17 wherein the absorbent substrate comprises cement screed, lime plaster, gypsum plaster, concrete, wood, or wood-based material.

19. The method of claim 15 wherein the floorcovering comprises wall-to-wall carpet, a floorcovering with textile underside, polyester non-woven covering, rubber covering, textile covering optionally wherein the textile covering has a backing of polyurethane foam, styrene-butadiene foam, or a textile secondary backing, needlefelt floorcovering, or linoleum covering, and the substrate comprises wood, screed, concrete or ceramic tile.

13. (canceled)

14. (canceled)