Fiber mat reinforced resin composite

Patent metadata

Field	Value
Publication number	US-9580563-B2
Application number	US-201414899299-A
Country	US
Kind code	B2
Filing date	Jun 24, 2014
Priority date	Jun 28, 2013
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The present invention related to a fiber mat reinforced resin composite comprising a reinforcing constituent of fibers in the form of at least one mat embedded within a resin matrix. The invention further relates to a method for the production of a fiber mat reinforced resin composite.

First claim

The invention claimed is:

1. A fiber mat reinforced resin composite comprising a reinforcing constituent of fibers in the form of at least one mat embedded within a resin matrix, characterized in that the resin matrix comprises thermoset resin and lignin crosslinked with a curing agent, and in that the fibers are natural fibers having an average length of 150 μm-9 mm.

2. The fiber mat reinforced resin composite as defined in claim 1 , wherein the natural fibers are wood fibers.

3. The fiber mat reinforced resin composite as defined in claim 1 , wherein the thermoset resin is epoxy resin.

4. The fiber mat reinforced resin composite as defined in claim 1 , wherein the curing agent is a polyamine curing agent.

5. The fiber mat reinforced resin composite as defined in claim 1 , wherein the fibers have an average length of 150 μm-4 mm.

6. The fiber mat reinforced resin composite as defined in claim 1 , wherein lignin is penetrated between the fibers of the at least one mat.

7. A method for producing a fiber mat reinforced resin composite as defined in claim 1 , characterized in that the method comprises the following steps:
a) forming a resin matrix by combining a thermoset resin, a curing agent, and lignin having an average particle size of 2-200 μm; and
b) embedding at least one mat of fibers, wherein the fibers are natural fibers having an average length of 150 μm-9 mm, within the resin matrix.

8. The method as defined in claim 7 , wherein the method further comprises step c) of heating the at least one mat of fibers embedded within the resin matrix at a temperature of 40-180° C. for curing the resin matrix.

9. The method as defined in claim 7 , wherein the lignin has an average particle size of 5-150 μm.

10. The method as defined in claim 7 , wherein the natural fibers are hardwood and/or softwood fibers, the zero span tensile index (ZSTI) of which is 30-200 Nm/g.

11. The fiber mat reinforced resin composite as defined in claim 1 configured to be used for the production of an aircraft, a boat, an automotive, a bath, a tank, a container, a sport or leisure product, an electronic or an electrical application, a roofing, a windmill blade, a pipe, a tube, a cable cover, a cladding, a cast, or a door.

12. The fiber mat reinforced resin composite as defined in claim 2 , wherein the wood fibers are cellulose fibers.

13. The method as defined in claim 9 , wherein the lignin has an average particle size of 10-100 μm.

14. The method as defined in claim 7 , wherein the natural fibers are hardwood and/or softwood fibers, the zero span tensile index (ZSTI) of which is 60-170 Nm/g.

15. The method as defined in claim 7 , wherein the natural fibers are hardwood and/or softwood fibers, the zero span tensile index (ZSTI) of which is 80-160 Nm/g.

Assignees

• Upm Kymmene Corp

Inventors

• Biesalski Markus
• Rehahn Matthias
• Klein Roland
• Mehlhase Sabrina
• Baaske Matthias
• Dietz Jennifer
• Schabel Samuel
• Kröling Henri
• Büter Andreas
• Fleckenstein Johanna
• Nubbo Narmin
• Miletzky Frank
• Endres Angelika
• Duetsch Michael
• Ringena Okko
• Valkonen Sanna

Classifications

• C08L97/005

  Lignin · CPC title

• C08J2363/00

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

• C08J5/045 Primary

  with vegetable or animal fibrous material · CPC title

• C07G1/00

  Low-molecular-weight derivatives of lignin (high-molecular-weight derivatives of lignin {C08H6/00}) · CPC title

• C08J2401/02

  Cellulose; Modified cellulose · CPC title