Thermoset compositions from plant polyphenols

摘要

A process and thermoset resin structures having: number of —OCNs attached to phenyl rings exceeds number of phenyl rings (provides glass transition temperature of 334° C. when combined with flexible bridge); bridge between rings does not hinder rotation and allows maximum rotational degrees of freedom (allows complete cure at temperatures less than 350° C.); and bridge between rings is small enough to maintain cyanurate density and allows for high char yields.

主权项

1. A process for making thermoset resins, comprising:
extracting polyphenol compounds from at least one plant(s) source having polyphenol compounds; isolating said polyphenols to produce polyphenolic compounds; chemically treating said polyphenolic compounds to produce cyanate esters, wherein said polyphenolic compounds having a plurality of OCNs attached to phenyl rings exceeding said number of phenyl rings providing glass transition temperatures of above 300° C. upon complete conversion to cyanurate when combined with flexible bridges, wherein said bridges are between said rings that permit rotation and permit maximum rotational degrees of freedom, wherein during curing temperatures are less than about 350° C., and wherein said bridge between said rings maintain cyanurate density and permit for high char yields; andpolymerizing said cyanate esters with heat to produce thermoset resin network(s), wherein said thermoset resins is the general formula 1, wherein “n” ranges from 1 to about 1,000,000,000,000,000,000,000,000,000,000,