High flame-retardant and high flexibility epoxy resin composition and preparation method thereof
An epoxy resin, high flame-retardant technology, applied in chemical instruments and methods, compounds of group 5/15 elements of the periodic table, organic chemistry, etc., can solve the problem of encapsulation and curing of electronic components resistant to cold and heat shock The material is brittle, the toughness is insufficient, etc., to achieve the effect of excellent flame retardant durability, improved moisture resistance, and reduced chemical resistance
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[0064] The preparation method of the above-mentioned high flame retardant and high flexibility epoxy resin composition, the steps are as follows:
[0065] Pre-mix epoxy resin, self-made high flame retardant curing agent with heterocyclic structure, other curing agents, curing accelerators, flame retardant synergists and inorganic fillers in proportion by mass, and the pre-mixing time is 3 to 10 minutes. The rotating speed is 600~1200r / min; melt extrusion mixing, extruder temperature is 80~160℃, extruder speed is 800~2400r / min, the tablet is crushed after cooling, crushed and sieved by ACM mill, that is, high flame retardancy and high flame retardant are obtained. Flexible epoxy resin composition.
[0066] More specifically, the preparation method of the high-flame-retardant and high-flexibility epoxy resin composition of the present invention provides two examples:
Example Embodiment
[0067] Example 1:
[0068] A preparation method of a high-flame-retardant and high-flexibility epoxy resin composition, the steps are as follows:
[0069] Pre-mix epoxy resin, self-made high flame retardant curing agent with heterocyclic structure (A), other curing agents, curing accelerators, flame retardant synergists and inorganic fillers in proportion by mass, and the pre-mixing time 3~10min, rotation speed 600~1200r / min; melt extrusion mixing, extruder temperature 80~160℃, extruder rotation speed 800~2400r / min, crush after tablet cooling, crush and sieve through ACM mill, namely The epoxy resin composition was obtained.
[0070] Wherein, there is the synthetic method of the high flame retardant curing agent (A) of heterocyclic structure:
[0071] (1) After finishing the four-necked flask, stirrer, distillation column, condenser tube and temperature-controlled heating mantle, add 210 g of neopentyl glycol, raise the temperature to 120 °C, heat and stir to melt; 56.77 g o...
Example Embodiment
[0077] Example 2:
[0078] A preparation method of a high flame-retardant and high-flexibility epoxy resin composition is as follows:
[0079] Pre-mix epoxy resin, self-made high flame retardant curing agent (B) with heterocyclic structure, other curing agents, curing accelerators, flame retardant synergists and inorganic fillers in proportion by mass, and the pre-mixing time 3~10min, rotation speed 600~1200r / min; melt extrusion mixing, extruder temperature 80~160℃, extruder rotation speed 800~2400r / min, crush after tablet cooling, crush and sieve through ACM mill, namely The epoxy resin composition was obtained.
[0080] Wherein, there is the synthetic method of the high flame retardant curing agent (B) of heterocyclic structure:
[0081] (1) After finishing the four-necked flask, stirrer, distillation column, condenser tube and temperature-controlled heating mantle, add 205 g of neopentyl glycol, raise the temperature to 120°C, heat and stir to melt; 71.12 g of 1,4-di-tert...
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