Patent ID: 7645838

Claim:
A modified polyphenylene ether resin which is a reaction product of 100 parts by weight of (A) a polyphenylene ether having a main chain structure of the following formula (1): (wherein R 1 and R 4 each independently represents hydrogen, a primary or secondary lower alkyl, a phenyl, an aminoalkyl or a hydrocarbonoxy, and R 2 and R 3 each independently represents hydrogen, a primary or secondary lower alkyl or a phenyl), and 0.01 to 10.0 parts by weight of (B) a modifier selected from dienophilic compounds having one dienophile group, wherein the number of rearrangement structures each represented by the following formula (2): (wherein R 1 , R 2 , R 3 and R 4 have the same meanings as defined above in the formula (1)) is less than 0.01 per 100 phenylene ether units of the formula (1).