Sizing composition for glass fibers

一种玻璃纤维、短切玻璃纤维的技术，应用在施胶组合物领域，能够解决离线法耗时等问题，达到劳动强度小、生产率提高、制造成本和制造时间降低的效果

Inactive Publication Date: 2010-02-03
OCV INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the current off-line method forms a suitable and marketable end product, the off-line method is time consuming not only because forming and cutting take place in two separate steps, but also because it requires extensively long drying times to fully cure Compound composition

Method used

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  • Sizing composition for glass fibers
  • Sizing composition for glass fibers
  • Sizing composition for glass fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Injection Molded Composite Parts Using the Size Composition of the Invention

[0060] The sizing formulations shown in Table 2 were prepared in buckets as outlined below. To prepare the size composition, 90% water and silane coupling agent were added to a bucket to form a mixture. The mixture is then stirred for a period of time to hydrolyze the silane. After hydrolysis of the silane, a film former is added to the mixture with stirring to form a size composition. The size composition was then diluted with the remaining water to achieve a target mixed solids of 6.0% mixed solids.

[0061] Table 2

[0062] Sizing composition of the present invention

[0063] Components of the compound composition

[0064] (a) γ-Aminopropyltrimethoxysilane (General Electric)

[0065] (b) Isocyanate-terminated polyurethane film-forming dispersion (Chemtura)

[0066] The size composition is applied to the E-glass by conventional means, such as the roller applicat...

Embodiment 2

[0071] Example 2: Compression-molded composite parts using the sizing composition of the invention

[0072] The sizing formulations shown in Table 4 were prepared in buckets following the outline instructions below. To prepare the size composition, 90% water and silane coupling agent were added to a bucket to form a mixture. The mixture is then stirred for a period of time to hydrolyze the silane. After hydrolysis of the silane, a film former is added to the mixture with stirring to form a size composition. The size composition was then diluted with the remaining water to achieve a target mixed solids of 6.0% mixed solids.

[0073] Table 4

[0074] Invented sizing composition

[0075] Components of the compound composition

[0076] (a) γ-Aminopropyltrimethoxysilane (General Electric)

[0077] (b) Isocyanate-terminated polyurethane film-forming dispersion (Chemtura)

[0078] The size composition is applied to the E-glass by conventional means, such as the roll...

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Abstract

A sizing composition that permits in-line chopping and drying of reinforcement fibers for reinforcing thermoset resins is provided. The size composition includes at least one coupling agent and one ormore blocked polyurethane film forming agents. The blocking agent preferably de-blocks at a temperature that permits simultaneous or nearly simultaneous de-blocking and curing of the polyurethane film former. The sized fiber strands may be chopped to form chopped strand segments and dried in a fluidized bed oven, such as a Cratec(R) drying oven, in-line. The chopped fiber strands may then be usedin a bulk molding compound and molded into a reinforced composite article. Chopping the glass fibers in-line lowers the manufacturing costs for products produced from the sized fiber bundles. Further, because the reinforcement fibers can be chopped and dried at a much faster rate with the inventive size composition compared to conventional off-line chopping processes, productivity is increased.

Description

technical field [0001] The present invention relates generally to sizing compositions for reinforcing fibrous materials, and more particularly to chemical compositions for chopped reinforcing fibers for reinforcing thermosetting resins. Background technique [0002] Fiberglass is used in a variety of technologies. For example, glass fibers are commonly used as reinforcement in polymer matrices to form glass fiber reinforced plastics or composites. Glass fibers have been used to reinforce polymers in the form of continuous or chopped monofilaments, tows, rovings, fabrics, nonwovens, meshes and scrims. It is known in the prior art that glass fiber reinforced polymer composites have higher mechanical properties compared to unreinforced polymer composites if the surface of the reinforcing fibers is properly modified with a sizing composition. Therefore, better dimensional stability, tensile strength and modulus, flexural strength and modulus, impact resistance, and creep resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/26C03C25/32C08K5/54C08K13/08C09D7/12
CPCC03C25/26C03C25/326C08G18/8061C08K5/544C08G18/289Y10T428/2962Y10T428/249933C03C25/32C08K13/08
Inventor E·L·维克里D·M·博雷斯W·G·黑格
Owner OCV INTELLECTUAL CAPITAL LLC
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