Impregnate with antistatic properties

Patent metadata

Field	Value
Publication number	US-11623995-B2
Application number	US-202217675451-A
Country	US
Kind code	B2
Filing date	Feb 18, 2022
Priority date	Apr 2, 2019
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

An impregnate with antistatic properties for use in laminates or for coating wood-based panels is disclosed. A resin used for impregnating and/or coating paper may include carbon-based particles, at least one compound of the general formula (Ia) R 1 a SiX (4-a) , R 3 c SiX (4-c) (II), and inorganic particles. X is methoxy, ethoxy, n-propoxy or i-propoxy. R 1 is an organic radical selected from the group including methyl, ethyl, propyl, or vinyl, and has at least one functional group Q 1 , selected from the group including acrylic, acryloxy, methacrylic, methacyloxy, or epoxy. R 3 is a non-hydrolyzable organic radical selected from the group including C1-C10 alky, C6-10 aryl, wherein C is 1, 2, or 3, and the inorganic particles have a size between 2 nm and 400 nm.

First claim

What is claimed is:

1. An impregnate with an impregnated paper layer with antistatic properties for use in laminates or for coating wood-based panels, wherein at least one resin used to impregnate and/or coat a paper comprises:
carbon-based particles, wherein a surface of the carbon-based particles comprises:
at least one compound having the general formula (Ia)
R 1 a SiX (4-a)   (Ia),

wherein X is methoxy, ethoxy, n-propoxy or i-propoxy,
wherein R 1 is an organic radical selected from the group consisting of methyl, ethyl, propyl or vinyl, and R 1 has at least one functional group Q 1 selected from a group consisting of an acrylic, acryloxy, methacrylic, methacryloxy, and epoxy group, and,
wherein a is 1 or 2;

at least one further compound of the general formula (II)
R 3 c SiX (4-c)   (II),

wherein X is methoxy, ethoxy, n-propoxy or i-propoxy,
wherein R 3 is a non-hydrolyzable organic radical R 3 selected from the group consisting of C1-C10 alkyl, C6-C10 aryl, and
wherein c is 1, 2 or 3; and,

inorganic particles with a size in the range of 2 nm to 400 nm.

2. The impregnate according to claim 1 , wherein the carbon-based particles comprise at least one of carbon nanotubes (CNTs) or graphene.

3. The impregnate according to claim 1 , wherein the inorganic particles have a size in the range of 2 nm to 100 nm.

4. The impregnate according to claim 1 , wherein the inorganic particles have a size in the range of 2 nm to 50 nm.

5. The impregnate according to claim 1 , wherein the inorganic particles comprise at least one of SiO 2 , AlO 23 , ZrO 2 , or TiO 2 particles.

6. The impregnate according to claim 1 , wherein the molar ratio of the silane compound of formula (Ia) to the silane compounds of formula (II) is between 1:0.5 and 1:2.

7. The impregnate according to claim 1 , wherein the inorganic particles are used in a quantity range of 0.1 to 25% by weight, based on the solids content of the silane.

8. The impregnate according to claim 7 , wherein the molar ratio of the silane compound of formula (Ia) to the silane compounds of formula (II) is between 1:1 and 1.1.5.

9. The impregnate according to claim 1 , wherein the at least one resin comprises carbon nanotubes, the carbon nanotubes comprising glycidyloxypropylmethyldiethoxysilane, glycidyloxypropyltriethoxysilane and octyltriethoxysilane, or a mixture thereof.

10. The impregnate according to claim 1 , wherein the paper to be impregnated and/or coated with the resin is a decorative, kraft, overlay or base paper.

11. The impregnate according to claim 2 , wherein the carbon nanotubes comprise a mixture of glycidyloxypropyltriethoxysilane and octyltriothoxysilane.

12. The impregnate according to claim 1 , wherein the at least one resin used for impregnation and/or coating is an aqueous formaldehyde-containing resin comprising at least one of a melamine-formaldehyde resin, urea-formaldehyde resin, melamine-urea-formaldehyde resin, phenol-formaldehyde resin or a mixture thereof.

13. The impregnate according to claim 1 , wherein the solids content of the resin is between 50 and 75% by weight.

14. A method of making an impregnate according to claim 1 , the method comprising the steps of:
providing a resin suspension comprising carbon-based particles, an at least one compound of the general formula (Ia) and at least one compound of the general formula (II);
providing a paper layer,
impregnating the paper layer with the resin suspension and/or coating the paper layer with the resin suspension; and
drying the impregnated and/or coated paper layer.

15. A laminate comprising an at least one impregnate having antistatic properties according to claim 1 .

16. The laminate according to claim 15 , wherein the at least one impregnate having antistatic properties is an overlay impregnate, kraft impregnate, and/or a decorative impregnate.

17. The laminate according to claim 15 , wherein, comprising an at least one further paper layer not provided with the present resin, an at least one transparent paper layer (glassine), an at least one plastic film layer, or a combination thereof.

18. The laminate according to claim 15 , wherein the laminate comprises an at least one kraft impregnate with antistatic properties, an at least one transparent paper layer, an at least one decorative paper layer, and an at least one overlay paper layer.

19. A wood-based panel comprising an at least one carrier board and an at least one impregnate having antistatic properties according to claim 1 deposited on at least one side of the carrier board.

20. The wood-based panel according to claim 19 , wherein the at least one impregnate with antistatic properties is a decorative impregnate.

Assignees

• Flooring Technologies Ltd

Inventors

• Gier Andreas
• Kalwa Norbert

Classifications

• C09D7/70

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title

• C08K5/54

  Silicon-containing compounds {(C08K5/0091 takes precedence)} · CPC title

• B32B2260/028

  Paper layer · CPC title

• B32B21/02 Primary

  the layer being formed} of fibres, chips, or particles {, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard · CPC title

• B32B21/08

  of synthetic resin · CPC title