Synthesis of oligomeric cyanate esters

Details Synthesis of oligomeric cyanate esters Synthesis of oligomeric cyanate esters

2008-03-11

2008-03-11

Truong, Duc (Department: 1796)

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

Synthetic resins

From reactant having a nitrogen atom directly bonded to the...

C528S086000, C528S196000, C528S258000, C528S368000, C528S423000, C528S480000, C528S486000, C528S488000, C528S495000, C525S330700, C525S534000

Reexamination Certificate

active

11425836

ABSTRACT:
A cyanate ester system is disclosed. An aryl ether oligomer may be made from a dihydroxyaromatic compound and a dihaloaromatic compound in the presence of a base. The oligomer is then reacted with a cyanide compound in the presence of a base to form the cyanate ester shown below. The cyanate ester may then be cross-linked to a thermoset having triazine ring cross-linksin-line-formulae description="In-line Formulae" end="lead"?HO—Ar2O—Ar1—O—Ar2nOH.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
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patent: 5-78446 (1993-03-01), None
Abed et al., “Synthesis of novel monomers for cyanate ester matrices”, Polymer Preprints, 33(2), 233 (1992).
Abed et al., “Synthesis and characterization of new phosphorus and other heteroatom containing Aryl cyanate ester—”, J. Polym. Sci. A: Polym. Chem., 35(6), 977 (1997).
Chang et al., “Polar interaction in a cyanated poly(ether sulfone)-modified polycyanurate”, Polymer, 39(20), 7119(1998).
Srinivasan et al., “Effect of backbone chemistry & functional termination—”, Polym. Preprints, 33(2), 325 (1992).

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