Brominated epoxy resin with highly symmetrical or saturated aliphatic heterocyclic ring and preparation method thereof

Abstract

The invention discloses a brominated epoxy resin with low molecular dipole moment properties such as a highly symmetrical and saturated aliphatic heterocyclic ring. When a novel resin and glass fiber cloth are prepared into a glass fiber laminated plate, high electrical property can be obtained, dielectric constant and consumption coefficient are particularly low and the resin is particularly applicable to high-speed and high-frequency signal transmission. The brominated epoxy resin is prepared by the following steps of: 1) reacting a phenolic compound A of which positions 2 and 6 are substituted by alkyl with an aldehyde compound or an aliphatic heterocyclic ring diolefin compound B so as to synthesize a bisphenol compound C with a highly symmetrical and saturated aliphatic heterocyclic ring structure; 2) performing an epoxidation reaction on C and epoxy chloropropane so as to form an aldehyde epoxy resin D; and 3) reacting the epoxy resin D with a bromphenol-containing compound E so as to obtain a brominated epoxy resin F.

Description

technical field [0001] The invention is a brominated epoxy resin with excellent electrical properties (low dielectric constant / low consumption coefficient), excellent flame resistance and excellent thermal stability, which is applied to the production of glass fiber laminated boards. The brominated epoxy resin With commonly used curing agents, such as: Dicyandiamide (Dicy for short), Phenol Novolac (PN for short), Melamine Phenol Novolac (MPN for short), Bisphenol A phenolic resin (Bisphenol A Novolac, referred to as BN) and tetraphenol ethane resin (Tetra phenyl ethane, referred to as TPE), and a curing accelerator, blended into a resin varnish composition, and then made of glass fiber laminates, using the brominated epoxy resin Compared with the glass fiber laminates made of bisphenol A type brominated epoxy resin in terms of physical properties, the glass fiber laminates have better electrical properties and thermal stability and have passed the flame-resistant UL94V-0 test...

AI Technical Summary

Problems solved by technology

As far as the resin system is concerned, FR-4 (glass transition temperature) combined with bisphenol A type brominated epoxy resin (such as Nan Ya Plastic Company's product name: NPEB-454A80) and glass fiber cloth (grade: E glass) is currently widely used. : 140℃) specification substrate with a Dk value of ≈4.6 can no longer meet the requirements in the field of high-speed and high-frequency signal transmission, although there are new materials such as bismelaimide-triazene BT), cyanate ester resin (Cyanate ester resin), polytetrafluoroethylene (Poly tetra-fluoroethane, PTFE for short), have been introduced into this application field, but each system has its advantages and disadvantages, for example, PTFE fluorine resin has low Dielectric constant, low consumption coefficient, low water absorption, but low Tg, high price, difficult processing and forming, and low adhesion to copper foil; And in the process of processing glass fiber laminates into printed circuit boards, the process conditions are quite different from those of the current glass fiber laminates, so they cannot be widely used

[0004] The application of printed circuit boards tends to be light, thin, short, small, and high-speed and high-frequency. In order to avoid serious signal attenuation due to the mismatch of glass fiber laminate materials used during high-speed and high-frequency signal transmission, so The glass fiber laminate materials used in this field must have electrical characteristics such as lower dielectric constant and lower dissipation factor, and must meet the requirements of operating under the conditions of existing processing equipment and existing processing technology, so it is necessary The development of a new resin material for the production of glass fiber laminates that can meet multiple needs at the same time has become an important issue that must be overcome by the craftsmen

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