Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2005-07-05
2005-07-05
Moore, Margaret G. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S218000, C528S043000, C528S029000, C528S205000
Reexamination Certificate
active
06914119
ABSTRACT:
A heat-resistant polyether having a heat resistance to a temperature of 300° C. or higher, sufficient solubility in organic solvents, low water absorption and high adhesion to substrates is provided by a heat-resistant polyether including a repeating unit represented by the formula (1) and having a polystyrene-converted weight-average molecular weight determined by GPC of not less than 1000 and not more than 50000:wherein Ar represents a bivalent organic group having an aromatic ring; R1to R8each independently represent a hydrogen atom or an aryl group which may be substituted; and when at least one of R1to R8is an aryl group which may be substituted, X represents a direct bond or a hydrocarbon group having 1 to 20 carbon atoms, while when all of R1to R8are hydrogen atoms, X is represented by the formula (2):in-line-formulae description="In-line Formulae" end="lead"?—CR9(R10)— (2)in-line-formulae description="In-line Formulae" end="tail"?wherein R9and R10each independently represent an aryl group which may be substituted.
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Satoh Naoya
Takigawa Mikio
Yoshida Yuji
Moore Margaret G.
Sughrue & Mion, PLLC
Sumitomo Chemical Company Limited
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