Nanoparticle pultrusion processing aide

Patent metadata

Field	Value
Publication number	US-9682518-B2
Application number	US-201514886949-A
Country	US
Kind code	B2
Filing date	Oct 19, 2015
Priority date	Sep 17, 2010
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The use of nanoparticles, including surface-modified silica and calcite nanoparticles, as processing aides for pultrusion is described. The methods include combining a resin system containing a resin and the nanoparticles with continuous fibers, pultruding this combination, and at least partially curing the resin. The methods are suitable for use with a wide variety of resins and fibers, and may be used to reduce the pull-force at a fixed fiber volume loading, increase the fiber volume loading, or both. Pultruded parts made by these methods and pultruded parts with high volume loadings of fibers are also described.

First claim

What is claimed is:

1. A method of forming a pultruded fiber reinforced polymer composite comprising:
impregnating continuous fibers with a resin system comprising a liquid resin and surface-modified silica nanoparticles, the resin system comprising 0.5 to 5 wt.% of the surface-modified silicia nanoparticles;
pulling the resin-impregnated fibers through a die, and
at least partially solidifying the resin system in the die, wherein solidifying the resin system comprises crosslinking the liquid resin;
wherein the pultruded fiber reinforced polymer composite comprises at least 66 volume percent of the continuous fibers.

2. The method of claim 1 , further comprising pulling the resin-impregnated fibers through a preforme and debulking the fibers.

3. The method of claim I, wherein the continuous fibers comprise fibers selected from the group consisting of aramid fibers, glass fibers, and carbon fibers.

4. The method of claim 1 , wherein the liquid resin comprises at least one of epoxy resin, vinyl ester resin, and polyester resin.

5. The method of claim 1 , wherein the resin system comprises a vinyl ester resin.

6. A pultruded fiber reinforced polymer composite made according to the method of claim 1 .

Assignees

• 3M Innovative Properties Co

Inventors

• Thunhorst Kristin L
• Goenner Emily S

Classifications

• C08J5/005

  Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials · CPC title

• C08J5/08

  glass fibres · CPC title

• C08J5/06 Primary

  using pretreated fibrous materials · CPC title

• C08J2363/00

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

• B29C70/521

  and impregnating the reinforcement before the die · CPC title