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Fatty amide composition for wet use chopped strand glass fibers

a technology of fatty amide and composition, which is applied in the direction of transportation and packaging, roofing, and roofing using flexible materials, etc., can solve the problems of poor physical properties of roofing shingles, poor mechanical performance of conventional size compositions, and poor tear strength of roofing shingles, so as to improve mechanical performance and tear strength. , the effect of improving the strength

Inactive Publication Date: 2005-12-15
OCV INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] An advantage of the synthesized fatty amide lubricant is its built-in reactivity with asphalt when forming an asphalt roofing product. Covalent bonding between the glass and the asphalt may be established through a vulcanizing mechanism in which the unsaturated hydrophobic tails on the synthesized fatty amide react with the asphalt in the presence of sulfur at an elevated temperature and crosslink the glass and the asphalt. This interfacial bonding results in increased mechanical performance and improved tear strength in the composite article formed from fibers sized with the inventive sizing composition.
[0011] A further advantage of the synthesized fatty amide lubricant is that the high hydrophobicity and low surface energy of the hydrophobic tails on the fatty amide lubricant enhances the compatibility between the glass and the asphalt during the formation of asphalt roofing products and improves glass / asphalt interactions through the reduced interfacial tensions.

Problems solved by technology

Unfortunately, such conventional size compositions are not always compatible with the asphalt used to coat the fibrous mats and form the roofing shingles.
Such incompatability may cause processing difficulties, and may result in roofing shingles that have poor physical properties, such as poor tear strength.
Further, the amount of binder that is employed in conjunction with the conventional sizing compositions may significantly increase the cost of the roofing shingles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Synthesis of a Conventional Lubricant—Lubesize K-12

[0034] Lubesize K-12 is a conventional lubricant that is an adduct of tetraethylenepentamine (TEPA) and stearic acid. It has no degree of unsaturation. The ingredients used to synthesize Lubesize K-12 are set forth in Table 1.

TABLE 1Weight (g)% of Total ChargeStearic Acid125.0063.98Tetraethylepetamine46.7523.93(TEPA)Acetic Acid23.6212.09Total195.37100.00

[0035] Table 2 illustrates a 1 kg charge based on the ingredients set forth in Table 1.

TABLE 2Weight (g)% of Total ChargeStearic Acid639.8063.98Tetraethylenepentamine(TEPA)239.323.93Acetic Acid120.912.09Total1000.00100.00

[0036] The stearic acid was charged and melted at 200° F. under a light nitrogen blanket. Once all of the stearic acid was melted, it was agitated under a nitrogen blanket. When the temperature was controlled at 200° F., the heat was removed. Tetraethylenepentamine (TEPA) was then slowly added from a dropping funnel. After an exotherm peak, the heating was resum...

example 2

Synthesis of an Unsaturated Fatty Amide Lubricant Containing Conjugated Diene Structure

[0039] The experiment set forth in Example 1 was repeated except that stearic acid was replaced with linoleic acid on an equivalent basis. The linoleic acid used was Emersol 315 linoleic acid from Cognis Corp. The finished product prior to acid neutralization had a residual acid value of 0.29% and an iodine value of 24.8. The iodine value of Emersol 315 linoleic acid was 27.4. It was determined that approximately 90.5% of the unsaturation in the fatty acid was maintained in the synthesized product.

example 3

Synthesis of an Unsaturated Fatty Amide Lubricant Containing No Conjugated Diene Structure

[0040] The experiment set forth in Example 1 was repeated except that stearic acid was replaced with oleic acid on an equivalent basis. The oleic acid used was Emersol 213 oleic acid from Cognis Corp. The synthesized product prior to acid adjustment had a residual acid value of 0.18% and an iodine value of 21.8. The iodine value of Emerson 213 oleic acid was 24.3. It was determined that approximately 90% of the unsaturation in the fatty acid was maintained in the synthesized product.

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Abstract

A size composition containing one or more film forming agents, at least one coupling agent, and a fatty amide lubricant synthesized from a (poly)ethylene amine and a C5-C20 unsaturated fatty acid is provided. The fatty acid is preferably a conjugated fatty acid and the (poly)ethylene amine is preferably tetraethylenepentamine. The fatty amide lubricant may be modified by maleinized rubber or carboxylated rubber. The size is advantageously applied to glass fibers such as wet use chopped strand glass and used to form roofing composites, such as shingles. The fatty amide lubricant facilitates interfacial bonding between the glass and asphalt through a vulcanizing mechanism. The unsaturation of the fatty amide modifies the surface energy of the glass fibers to make the glass more compatible with the asphalt, enhances the compatibility between the glass and the asphalt, and improves glass / asphalt interactions through the reduced interfacial tensions.

Description

TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY OF THE INVENTION [0001] The present invention relates generally to a sizing composition for glass fibers, and more particularly, to a sizing composition for wet use chopped strand glass fibers that contains a fatty amide lubricant synthesized from a (poly)ethylene amine and an unsaturated C5-C20 fatty acid. A composite roofing material formed from a reinforcing fiber material sized with the sizing composition is also provided. BACKGROUND OF THE INVENTION [0002] Glass fibers are useful in a variety of technologies. For example, glass fibers are commonly used as reinforcements in the building composite industry because they do not shrink or stretch in response to changing atmospheric conditions. Roofing materials such as roofing shingles, roll roofing, and commercial roofing, are typically constructed of a glass fiber mat, an asphalt coating on the fibrous mat, and a surface layer of granules embedded in the asphalt coating. [0003] To form ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C03C25/24C03C25/26C03C25/32E04D1/20E04D1/26E04D5/02
CPCC03C25/246C03C25/26E04D5/02E04D1/20C03C25/32C03C25/25Y10T428/249924C03C25/24C03C25/28
Inventor LEE, JERRY H. C.BARRICK, WILLIAM E.WELLER, DAVID E.
Owner OCV INTELLECTUAL CAPITAL LLC
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