Patent ID: 9458299
Filing Date: 2016-10-04
CPC Classification: C08C,C08F,C08G,C08J,C09D

Claim Text:
1. A method of producing a composite article, comprising: forming a mixture comprising a solvent, paraformaldehyde, an aromatic amine, a Michael addition donor, and a Michael addition acceptor; heating the mixture to a first temperature to produce a mixture of a first viscosity; coating a work piece with the mixture of the first viscosity to produce a prepreg; heating the prepreg to a second temperature to produce a B-stage prepreg of a second viscosity; cooling the B-stage prepreg; forming an article from the B-stage prepreg; and heating the article at a temperature from about 150° C. to about 280° C. to form a cured composite containing polyhexahydrotriazine.