Patent ID: 9080026
Filing Date: 2015-07-14
Classification: B29C,B29K,C08G,C08J,C08K,C08L,D06N,Y10T

Abstract:
1. A method for producing a flame retarded composite article including the steps of: a) providing a layer or bundle of reinforcement fibers; b) providing a halogen-free thermosetting composition comprising: (i) 15-30 parts by weight of a benzoxazine compound of the formula (I) wherein each R is, independently from one another, allyl, unsubstituted or substituted phenyl, unsubstituted or substituted C 1 -C 8 alkyl or unsubstituted or substituted C 3 -C 8 cycloalkyl, (ii) a monobenzoxazine monomer of the formula (H) wherein X is monophenol, a C 1 -C 8 alkyl group or a C 3 -C 8 cycloalkyl group and (iii) a naphthalene epoxy where parts by weight are based on 100 parts by weight of the halogen-free thermosetting composition; c) contacting the reinforcement fibers with the halogen-free thermosetting composition to coat and/or impregnate the reinforcement fibers; and d) curing the coated and/or impregnated reinforcement fibers at a temperature of least about 80° C.