Building products comprising graphene or graphene oxide in the bulk material and method for producing such building products

Patent metadata

Field	Value
Publication number	US-10836679-B2
Application number	US-201515780165-A
Country	US
Kind code	B2
Filing date	Dec 18, 2015
Priority date	Nov 30, 2015
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

The invention relates to building products that contain graphene and/or graphene oxide in the bulk component thereof. The addition of graphene and/or graphene oxide improves the mechanical properties of said building products, particularly in terms of strength.

First claim

The invention claimed is:

1. Building products, wherein the building products contain graphene and/or graphene oxide produced by shearing graphite powder and adding a tenside.

2. Building product according to claim 1 , wherein the building product is a building panel, a partition wall brick, a screed, a plaster or a putty.

3. Building product according to claim 2 , wherein the building product contains graphene and/or graphene oxide shavings or flakes.

4. Building product according to claim 3 , wherein the graphene and/or the graphene oxide is distributed homogeneously in the building product.

5. Building product according to claim 4 , wherein only a part of the building product contains graphene and/or graphene oxide.

6. Building product according to claim 5 , wherein the building product is a building panel.

7. Building panel according to claim 6 , wherein the building panel consists of at least one core layer and at least one outer layer, wherein at least either the core layer or the outer layer contains graphene and/or graphene oxide shavings or flakes.

8. Building product according to claim 7 , wherein the building product comprises a binder that contains cement.

9. Method for producing a building product containing graphene and/or graphene oxide, comprising mixing graphene and/or graphene oxide, particularly in the form of shavings or flakes, with a cement-based binder and water, shaping the mixture and drying the building product that is shaped in this way, wherein the graphene and/or graphene oxide is used in the form of a suspension, particularly a suspension in water, and wherein the suspension is produced by shearing graphite powder and adding a tenside.

10. Method according to claim 9 , wherein a shear rate greater than 10 4 s −1 is used to produce the suspension.

11. Use of graphene and/or graphene oxide in building products to improve their mechanical strength or increase the fire protection class of the building products, wherein the building products are building products that contain cement wherein the graphene and/or graphene oxide is used in the form of a suspension and wherein the suspension is produced by shearing graphite powder and adding a tenside.

12. Use according to claim 11 , wherein the building products include building panels, partition wall bricks, screeds, plasters and putties.

Assignees

• Knauf Gips Kg

Inventors

• Wieteska Marcin
• Kiedrzyn Grzegorz

Classifications

• E04C2/044

  of concrete (E04C2/049 takes precedence) · CPC title

• E04C2/043

  of plaster (E04C2/049 takes precedence) · CPC title

• E04C1/00

  Building elements of block or other shape for the construction of parts of buildings (of relatively thin form E04C2/00; structural elongated elements designed for load-supporting E04C3/00, e.g. columns or pillars E04C3/30; manufacture or material of building bricks, stones, or the like B28, C03, C04; paving elements E01C; general building constructions E04B, e.g. walls E04B2/00, floors E04B5/00, roofs E04B7/00, ceilings E04B9/00; {roof coverings E04D; coverings for walls or ceilings E04F13/00; floorings E04F15/00;} structural elements specially designed for built-in conduit shafts E04F17/00; {elements for buildings for particular purposes E04H7/00}; special elements for building ovens or furnaces F24B, F27D) · CPC title

• C04B2111/00612

  as one or more layers of a layered structure · CPC title

• C04B2103/40

  Surface-active agents, dispersants · CPC title