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
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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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