Bifunctional phenylene ether oligomer, its derivatives, its...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

Reexamination Certificate

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C174S255000, C428S297400, C428S413000, C525S390000, C525S391000, C528S219000

Reexamination Certificate

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11110917

ABSTRACT:
A bifunctional phenylene ether oligomer of the formula (1), obtained by oxidation polymerization of a bivalent phenol of the formula (2) and a monovalent phenol of the formula (3),wherein —X— is represented by the formula (2′),and Y—O— is represented by the formula (3),R2, R3, R4, R8, R9, R10 and R11 in the formula (2′) and the formula (3′) being required not to be a hydrogen atom, and its use.

REFERENCES:
patent: 5270435 (1993-12-01), Pfaendner et al.
patent: 6689920 (2004-02-01), Ishii et al.
patent: 921158 (1999-06-01), None

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