Flame-retardant epoxy resin composition and liminate made with same
A technology of epoxy resin and composition, which is applied in the direction of synthetic resin layered products, layered products, transportation and packaging, etc., which can solve the problems of non-flammability, increased dielectric constant, and reduced processing performance of laminates. , to achieve high flame retardancy, improved flame retardancy, and high thermal strength
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Embodiment 1
[0190] 33.48 mass % phenol biphenyl aralkyl epoxy resin (epoxy resin 1), 25.43 mass % phenol biphenyl aralkyl resin (phenolic resin 1), 40.0 mass % aluminum hydroxide, 0.80 mass % silane coupling To a mixture consisting of a curing accelerator catalyst of 0.29% by mass of a curing accelerator, methyl ethyl ketone was added to prepare an epoxy resin varnish containing 65% by mass of non-volatile components.
[0191] The epoxy varnish was continuously impregnated into the glass fabric by coating, and then dried in an oven at 120° C. to prepare a prepreg. Eight such prepregs were laminated together to prepare a laminate. At 170°C, 40kg / cm 2 The laminate was hot pressed under pressure for 20 minutes and then post-cured at 175° C. for 6 hours to obtain a glass-epoxy laminate with a thickness of 1.6 mm.
[0192] The laminates were tested for flame retardancy, dielectric constant and molding properties. The results are listed in Table 2.
[0193]The epoxy resin varnish obtained i...
Embodiment 2～24
[0196] A laminate was prepared in the same manner as in Example 1, except that the flame-retardant epoxy resin composition whose formulation was shown in Tables 2-5 was used. They were tested for flame retardancy, dielectric constant, moldability and solder heat resistance. The results are listed in Tables 2-5.
Embodiment 25
[0200] 15.95% by mass of phenol biphenyl aralkyl resin (phenolic resin 1), 12.57% by mass of bisphenol A type epoxy resin (epoxy resin 4), 15.0% by mass of aluminum hydroxide, 55.0% by mass of fused pulverized silica powder, 1.40% by mass of a silane coupling agent, 0.20% by mass of carnauba wax, and 0.24% by mass of triphenylphosphine (T.P.P.). The premix was kneaded on a heated roll at 100°C for about 5 minutes. The kneaded material was cooled and ground to obtain a resin composition.
[0201] The resin composition shown in Example 25 was compressed into tablets. The tablet was preheated to 85°C and molded with a single plunger die casting machine in accordance with the requirements of the UL 94 flame retardancy specification, provided that injection time: 15 seconds, injection pressure: 100kg / cm 2 (working pressure), molding temperature: 175°C, molding time: 120 seconds. The molding material was post-cured at 175° C. for 6 hours to obtain a molded plate for flame retarda...
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