Curable polyphenylene ether resin composition and a cured resin composition obtainable therefrom

A curable polyphenylene ether resin composition comprising:

• (a) 98 to 40% by weight, based on the total weight of components (a) and (b), of a curable polyphenylene ether resin comprising at least one polyphenylene ether represented by the formula:
• ##STR17## wherein m is an integer of 1 or 2, J is a polyphenylene ether chain comprising units of the formula:
• ##STR18## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, an allyl group or a propargyl group, at least one of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 being other than hydrogen, and
• Q' represents a hydrogen atom when m is 1, and Q' in each polyphenylene ether independently represents Q or Q substituted with at least one substituent selected from the group consisting of an allyl group and a propargyl group when m is 2,
• where Q is the residue of a bifunctional phenol having 2 phenolic hydroxyl groups and having unpolymerizable substituents at the ortho and para positions with respect to the phenolic hydroxyl groups,
• with the proviso that each polyphenylene ether chain is the same or different when m is 2 and that said units of formula (II) are the same or different,
• said curable polyphenylene ether resin having an average substitution degree of allyl and propargyl groups of from 0.1 to 100 % by mole as defined by the formula:
• ##EQU11## (b) 2 to 60% by weight, based on the total weight of components (a) and (b), of at least one cyanurate selected from the group consisting of triallyl isocyanurate and triallyl cyanurate;
• (c) 0 to 50% by weight, based on the total weight of components (a) and (b), of a fire retardant selected from the group consisting of a phosphorus-containing fire retardant, a chlorine-containing fire retardant and a bromine-containing fire retardant;
• (d) 0 to 50% by weight, based on the total weight of components (a) and (b), of an antimony-containing auxiliary fire retardant;
• and
• (e) 0 to 90% by weight, based on the total weight of components (a), (b), (c), (d) and (e), of a reinforcement.