Polyfunctional phenylene ether oligomer, derivative thereof,...

Details Polyfunctional phenylene ether oligomer, derivative thereof,... Polyfunctional phenylene ether oligomer, derivative thereof,...

2007-02-09

2010-02-16

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

Reexamination Certificate

active

07662906

ABSTRACT:
A polyfunctional phenylene ether oligomer (B) having 3 to less than 9 phenolic hydroxyl groups, obtained by reacting a polyfunctional phenol (A) having 3 to less than 9 phenolic hydroxyl groups per molecule and having alkyl groups and/or alkylene groups at 2- and 6-positions of at least one of the phenolic hydroxyl groups with a monohydric phenol compound of the formula (1), derivatives thereof, resin compositions containing the derivatives, curable films obtained therefrom and cured films thereof,wherein R1and R2are the same or different and represent a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, and R3and R4are the same or different and represent a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group.

REFERENCES:
patent: 4116936 (1978-09-01), Steiner
patent: 4923932 (1990-05-01), Katayose et al.
patent: 2005/0090624 (2005-04-01), Norisue et al.

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