Fibersizing with small amounts of nanomaterials

Patent metadata

Field	Value
Publication number	US-10479726-B2
Application number	US-201615554374-A
Country	US
Kind code	B2
Filing date	Mar 7, 2016
Priority date	Mar 10, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Nanoparticle-coated fibre material, the coating of which includes between 0.01 and less than 2.0 wt % of nanoparticles based on the dry weight of the coated fibre material and is capable of undergoing further reactions, a process for producing the nanoparticle-coated fibre materials, and also corresponding fibre composite materials.

First claim

The invention claimed is:

1. A nanoparticle-coated fibre material, comprising a fibre material and a coating on at least a portion of the fibre material, wherein:
the coating comprises from 0.01 wt % to less than 0.4 wt % of nanoparticles based on a dry weight of the nanoparticle-coated fibre material;
the coating is capable of undergoing further reactions; and
the nanoparticles comprise surface-modified spherical silica nanoparticles.

2. The fibre material according to claim 1 , wherein the fibre material comprises a glass fibre material.

3. The fibre material according to claim 1 , wherein the coating further comprises crosslinkable epoxy groups capable of undergoing the further reactions.

4. The fibre material according to claim 1 , wherein the coating further comprises an epoxy resin.

5. A process for producing a nanoparticle-coated fibre material, the process comprising:
contacting a fibre material with an aqueous emulsion comprising a film-former by dipping, spraying or bathing the fibre material with the aqueous emulsion, to obtain a coated fibre material; and then
drying the coated fibre material, to obtain a nanoparticle-coated fibre material, wherein:
the aqueous emulsion further comprises surface-modified spherical silica nanoparticles; and
the coating of the nanoparticle-coated fibre material comprises from 0.01 wt % to less than 0.4 wt % of nanoparticles based on a dry weight of the coated fibre material.

6. A process for producing a nanoparticle-coated fibre material, the process comprising:
contacting a fibre material with an aqueous emulsion comprising a film-former, to obtain a coated fibre material; and then
drying the coated fibre material, to obtain a nanoparticle-coated fibre material,
wherein:
the aqueous emulsion further comprises surface-modified spherical silica nanoparticles;
the coating of the nanoparticle-coated fibre material comprises from 0.01 wt % to less than 0.4 wt % of nanoparticles based on a dry weight of the coated fibre material; and
the contacting occurs by applying the aqueous emulsion to the fibre material with a rotating applicator roll, such that the contacting does not occur by directly dipping the fibre material into a bath of the aqueous emulsion.

7. The process according to claim 5 , wherein the aqueous emulsion comprises from 1 to 50 wt % of the surface-modified spherical nanoparticles based on a solids content of the aqueous emulsion.

8. A fibre composite material, comprising the nanoparticle-coated fibre material of claim 1 .

9. The fibre composite material according to claim 8 , comprising the nanoparticle-coated fibre material in a polymer matrix.

10. The fibre composite material according to claim 9 , wherein the polymer matrix is a thermoset polymer matrix.

11. The fibre composite material according to claim 10 , wherein the thermoset polymer matrix is an epoxy resin.

12. The process according to claim 6 , wherein the aqueous emulsion comprises from 1 to 50 wt % of the surface-modified spherical nanoparticles based on a solids content of the aqueous emulsion.

Assignees

• Evonik Degussa Gmbh

Inventors

• Sprenger Stephan
• Naumann Matthias

Classifications

• C03C25/20 Primary

  Contacting the fibres with applicators, e.g. rolls · CPC title

• C03C25/47 Primary

  containing particles, fibres or flakes, e.g. in a continuous phase · CPC title

• C08J2363/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• C03C25/36

  Epoxy resins · CPC title

• C03C25/26

  Macromolecular compounds or prepolymers · CPC title