Epoxy sizing composition for filament winding

a technology of sizing composition and filament winding, which is applied in the direction of transportation and packaging, thin material handling, coating, etc., can solve the problems of low thermal conductivity, high tensile strength of glass fibers, heat resistance, moisture resistance, etc., and achieves improved wet tensile strength performance, color-free effect, and easy dispersal in water

Inactive Publication Date: 2006-02-16
OCV INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022] It is also an advantage of the present invention that the film forming emulsions are substantially color free and disperse easily in water.
[0023] It is another advantage of the sizing composition that composite articles formed from fibers sized with the sizing composition demonstrate improved wet tensile strength performance, improved cyclic and static fatigue, and improved resistance to cracking. Improved pipe cyclic and static fatigue may permit a pipe manufacturer to reduce the thickness of the pipe wall in a composite part sized with the inventive sizing composition and achieve an improved level of leak resistance in the pipe. In addition, a thinner pipe wall results in a reduction in the pipe's overall weight and a reduction in materials used to form the pipe, thereby reducing manufacturing costs.
[0024] It is also an advantage of the present invention that the small amount of boron present in the size composition reduces the amount of boron present in the air and assists in making the inventive size composition environmentally friendly.
[0025] It is a further advantage of the present invention that the size composition reduces or eliminates package growth and reduces the number of deformed packages.
[0026] It is another advantage of the present invention that the size composition provides superior processing characteristics such as faster impregnation of a glass strand by the epoxy resin, a low level of broken filaments (fuzz), and a reduction in drag.
[0027] It is yet another advantage of the present invention that the size composition reduces the occurrence of migration in the final package. Thus, the amount of the external portion of the package that would be removed as waste as a result of size migration is reduced or eliminated by utilizing the inventive sizing composition.

Problems solved by technology

In addition, glass fibers have high tensile strength, heat resistance, moisture resistance, and low thermal conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Testing for the Occurrence of Fuzz on Sized Glass Fibers

[0061] The size composition set forth in Table 4 was prepared and applied to glass fibers having diameters of 17-23 microns by conventional techniques. The size composition was applied to the fibers in an amount sufficient to achieve a Loss on Ignition (LOI) of 0.45-0.77%. The sized fibers were then dried in a conventional manner at a temperature and for a time sufficient to both dry and cure the sizing on the glass fibers.

TABLE 4Size Composition A% bySizingWeightComponentSolidsEpoxy Resin Emulsion75.6Aminosilane Coupling0.6AgentEpoxy Silane Coupling13.7AgentNon-Ionic Lubricant8.0Cationic0.65Lubricant / Antistatic AgentAcetic Acid0.7Boric Acid0.6

[0062] The glass fibers sized with Size Composition A set forth in Table 4 were then tested in a bench scaled test to determine amount of fuzz generated by the glass fibers. The testing was conducted by running the glass fibers over a set of 11 separate contact points at a rate of 400 ...

example 2

Testing for Drag of Sized Glass Fibers

[0066] Glass fibers sized with inventive Size Composition A set forth in Table 4 were tested to determine amount of drag (frictional resistance) generated by the glass fibers. The testing was conducted by running the glass fibers over 11 contact points at a rate of 400 feet per minute. A tension meter was positioned at a location after the 11th contact point to measure the tension of the glass fibers. Tension was measured over a time period of 15 seconds. Three measurements were taken and averaged to achieve the data set forth in Table 6.

[0067] Glass fibers sized with Control 1, which is the closest current epoxy compatible product for filament winding from Owens Corning and is a sizing formed in accordance with the description set forth in co-pending parent application U.S. patent application Ser. No. 10 / 872,103 entitled “Epoxy Sizing Composition For Filament Winding” filed Jun. 18, 2004 (expressly incorporated by reference in its entirety), ...

example 3

Effect on Pipe Axial Tensile Strength, 7 Day Boil

[0069] Glass fibers sized with Size Composition A (shown in Table 4) were helically wound about a mandrel and cured to form amine cured epoxy pipes. Pipes were also made using Control 1, which is the closest current epoxy compatible product for filament winding from Owens Corning and is a sizing formed in accordance with the description set forth in co-pending parent application U.S. patent application Ser. No. 10 / 872,103 entitled “Epoxy Sizing Composition For Filament Winding” filed Jun. 18, 2004 (expressly incorporated by reference in its entirety), and Control 2, which a current epoxy compatible product for filament winding that is commercially available from Owens Corning. The control products used sizing chemistries for epoxy filament winding that included silane coupling agents, epoxy film formers, and various lubricants.

[0070] The pipes made and used in this experiment were 12 foot long pipes that had an inside diameter of 2....

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Abstract

A sizing composition containing an epoxy film former, a silane package that includes an aminosilane coupling agent and an epoxy silane coupling agent, a cationic lubricant, a non-ionic lubricant, an antistatic agent, and at least one acid is provided. The epoxy resin emulsion includes a low molecular weight liquid epoxy resin and one or more surfactants. The epoxy resin preferably has an epoxy equivalent weight of from about 185 to about 192. The sizing composition may optionally contain polyurethane or epoxy / polyurethane film former. The sizing composition may be used to size glass fibers used in filament winding applications to form reinforced composite articles with improved mechanical properties, wet tensile properties, improved resistance to cracking, and improved processing characteristics. The sizing composition also provides improved processing parameters such as low fuzz and reduced drag.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part of U.S. patent application Ser. No. 10 / 872,103 entitled “Epoxy Sizing Composition For Filament Winding” filed Jun. 18, 2004, the entire content of which is expressly incorporated herein by reference.TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY OF THE INVENTION [0002] The present invention relates generally to size compositions for glass fibers, and more particularly, to size compositions containing an epoxy resin emulsion that includes a low epoxy equivalent weight epoxy resin for sizing glass fibers used in a filament winding application. A composite article formed from fibers sized with the sizing composition is also provided. BACKGROUND OF THE INVENTION [0003] Glass fibers are useful in a variety of technologies. For example, glass fibers are commonly used as reinforcements in polymer matrices to form glass fiber reinforced plastics or composites because they provide dimensional stability as...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L63/00C08K5/544C03C25/26C03C25/36C08L75/04C09D163/00
CPCC03C25/26C03C25/36C08L75/04C09D163/00C08L2666/44C08L2666/20Y10T428/31518
Inventor ADZIMA, LEONARD J.ANTLE, JEFFREY L.HOLMAN, DONALD R.GREENWOOD, MARK E.
Owner OCV INTELLECTUAL CAPITAL LLC
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