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Silicone resin based composites interleaved for improved toughness

A technology of resin composite materials and composite materials, which is applied in the direction of circuit substrate materials, synthetic resin layered products, thin material processing, etc., and can solve problems such as damage to composite materials

Inactive Publication Date: 2005-07-13
MASSACHUSETTS INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when they are stressed to failure, such composites tend to fail in delamination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 : Preparation of glass fiber reinforced silicone resin laminated products

[0021] In this example, the prepared glass fiber reinforced silicone laminate was used as a comparison basis for the filled ply composite prepared according to the present invention.

[0022] A solid, low molecular weight silicone resin with reactive silanol groups (approximately 2% by weight) was used as the base resin. A commercial fiberglass weave style 7781 with a thermally cleaned surface (finish type 112) was used as reinforcement for making the laminate. The silicone resin has a number average molecular weight of about 1400 and a weight average molecular weight of about 1800. It is cured by condensation of the remaining silanol groups. The fully condensed resin composite has the general formula (PhSiO 3 / 2 ) 0.4 (MeSiO 3 / 2 ) 0.45 (Ph 2 SiO 2 / 2 ) 0.1 (PhMeSiO 2 / 2 ) 0.05 To represent.

[0023] 114 grams of uncured resin of the above characteristics were dissolved in 96 g...

Embodiment 2

[0028] Example 2 Preparation of Silicone Rubber Filled Glass Fiber Reinforced Silicone Laminates

[0029] In this example, a glass fiber reinforced silicone composite material was produced according to the invention by filling it with a tough silicone resin.

[0030] The specific resin compound in Example 1 was used as the base resin. Fiberglass of the same weave style 7781 and finish type 112 was used as reinforcement. 114 grams of uncured resin was dissolved in 96 grams of toluene. As in Example 1, 0.144 grams of Dow Corning Catalyst Y-177  , 7.2 g of triethoxysiloxy-terminated polydimethylsiloxane having a degree of polymerization of 14, and 1.11 g of dibutyltin dilaurate were added to the solution and mixed together.

[0031] As in Example 1, 127 grams of glass fibers, cut into 8 "9 x 9" square pieces, were impregnated with the resin solution. The impregnated fiber sheets were dried overnight on top of a wire mesh in a fume hood. The weight of the dried resin-imp...

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Abstract

A fiber-reinforced silicone matrix resin matrix with higher resistance to delamination is created by incorporating a silicone resin of a different toughness and lower modulus than the matrix resin between each fiber layer of the composite. composite materials. Preferably, a glass or carbon fiber woven mat impregnated with a predetermined silicone matrix resin is coated with a precursor to a tougher filled layer silicone. The resulting stack of alternating layers of resin-fiber layers and tougher silicone-filled layers provides a tougher silicone-based composite.

Description

technical field [0001] The present invention relates to silicone resin-based composite materials. In particular, the present invention relates to fiber reinforced resin composites having a rigid silicone-based resin filled with a thin silicone layer of a flexible impact-resistant material. Background technique [0002] Fiber-reinforced silicone-based resin composites are widely used in building components. Fiber reinforcement is often in the form of woven fiberglass mats. Woven carbon fiber mats offer a higher modulus reinforcing medium, but they are more expensive than fiberglass. Other fiber composites such as aramid, nylon, polyester and quartz fibers can also be used. Other fiber forms, such as non-woven mats and loose fiber layers, can also be used in silicone-based resin composites. [0003] A large family of silicone-based resins are available for composite applications. Such resins are generally in cured form highly branched and crosslinked polymer molecules. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24B32B5/26B32B27/00B32B27/04C08J5/04H05K1/03
CPCB32B5/26B32B27/04C08J5/04C08J2383/04H05K1/0366Y10T428/31663Y10T428/24994
Inventor 弗雷德里克·J·麦克格里朱毕忠季米特里斯·E·卡佐里斯
Owner MASSACHUSETTS INST OF TECH
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