Low dielectric brominated resin with a symmetric or...

Details Low dielectric brominated resin with a symmetric or... Low dielectric brominated resin with a symmetric or...

2010-04-01

2011-10-18

Sellers, Robert (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S503000, C525S504000, C525S507000

Reexamination Certificate

active

08039560

ABSTRACT:
The present invention provides a brominated epoxy resin, which has a molecular segment of low polarity in the polymer chain, while the molecular segment of low polarity is attributed to the symmetric or saturated cyclic alphatic molecular structure with low “molecular dipole moment” characteristics; making a printed circuit board for high frequency signal transformation applications needs a proper copper clad laminate which processes the properties of a low dielectric constant and of a low dissipation factor; a copper clad laminate can meet above requirements by using the inventive resin as a laminate binder. The inventive resin is prepared by the following steps:1. Reacting a 2,6-disubstituted mono-phenol compound (A) with an aldehyde or a cyclic diene compound (B), so as to obtain a bisphenol compound (C) having a high symmetry or saturated aliphatic heterocyclic structure;2. Reacting the resultant symmetric or saturated cyclic diphenol compound (C) with epichlorohydrin for an epoxidation reaction to obtain an epoxy resin (D); and3. Reacting the resultant epoxy resin (D) with a bromine-containing phenolic compound (E) to obtain the inventive novel brominated epoxy resin (F).

REFERENCES:
patent: 5073605 (1991-12-01), Hallgren et al.
patent: 5262491 (1993-11-01), Jain et al.
patent: 7-157546 (1995-06-01), None
Allan S. Hay, Polymerization by Oxidative Coupling: Discovery and Commercialization of PPO and Noryl Resins, Journal of Polymer Sciences, 1997 p 505-517, vol. 36.

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