Phosphor-containing phenol formaldehyde resin and flame-retardant epoxy resin hardener containing thereof

摘要

The introduction of environmentally-friendly organic phosphorus group can not only maintain the original excellent properties of epoxy resins, but also meet the high flame-retarding requirements, and have the ability to improve the vitrification temperature (Tg), heat resistance and other characteristics of the material so that the curing system can be successfully applied to the electronic materials field which are light, thin, small and precise, the present disclosure provides a flame-retarding phosphor-containing phenol-formaldehyde novolac and the preparation method thereof, the use of the compound to react with the epoxy group of an epoxy resin to obtain an environmentally-friendly and high performing halogen-free cured flame retarding epoxy resin, and the compound can also be used for curing epoxy resins and gives a high flame-retarding effect.

主权项

1. A phosphorous-containing flame retarding phenol-formaldehyde novolac, comprising a compound with the general formula represented by formula (I): wherein A and A′ are individuallyY is —CH2— or —CH2—O—CH2—, and Y in different units are the same or different;
Z is —CH2—, —C(CH3)2—, —O—, —S— or —S(O)2—, and Z in different units are the same or different, wherein Z is different from Y; R is H, a C1-C10 alkyl group, a C6-C18 aromatic group,and R in different units are the same or different;
p is 0-2; q is 0-3; a is an integer greater than or equal to 1; b is an integer greater than or equal to 1; m is 0-6; X iswherein Ar and Ar′ are individuallyR′ is H, a C1-C4 alkyl group or a C6-C18 aromatic group, and R′ in different units are the same or different; and
n is 0-5.