Patent ID: 9605161
Date: 2017-03-28
CPC Classifications: B82Y,C03C,C04B,C08J,C08L,C09D,H01B,H01L,Y10T

Claim:
1. A process for preparing a carbonized layered article comprising the steps of: (I) providing a liquid precursor composition, comprising (a) at least one aromatic epoxy resin; and (b)(i) at least one aromatic co-reactive curing agent, (b)(ii) at least one catalytic curing agent, or (b)(iii) a mixture thereof; wherein the liquid precursor composition has a neat viscosity of less than 10,000 mPa-s at 25° C. prior to adding optional components, prior to curing and prior to carbonizing; which optional components are selected from the group consisting of an additional epoxy resin different from the aromatic epoxy resin, an additional curing agent different from the aromatic co-reactive curing agent and the catalytic curing agent, a divinylarene dioxide, a filler, a reactive diluent, a flexibilizing agent, a processing aid, a toughening agent, and mixtures thereof; (II) applying the liquid precursor composition of step (I) as a coating layer onto at least a portion of a surface of a substrate; (III) curing the liquid precursor composition of step (II) to form a cured product; wherein the cured product has a carbon yield of at least 35 weight percent, when treated at 10° C./minute from 25° C. to 1,000° C. under an inert atmosphere, and disregarding the weight of the substrate and the optional components present in the composition; and (IV) carbonizing the cured product of step (III) to form a carbonized layered article.