HOT-MELT BINDER, METHOD FOR PRODUCTION THEREOF, PREPREG AND HONEYCOMB PANEL BASED THEREON Russian patent published in 2013 - IPC C08L63/00 C08K13/00 C08K5/00 B32B17/10 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry and the technology of producing semi-products from hot-melt compositions of epoxy resins, prepregs and laminates based thereon and can be used in making three-layer (sandwich) panels. The present invention can be used in aircraft floor panels which consist of composite cells and composite covers. The composition of hot-melt binder for a prepreg and a honeycomb panel based thereon contains epoxy-novolac resin, epoxy resin based on tetrabromodiane, epoxy-diane resin, high molecular weight epoxy resin, dicyandiamide, bis(N,N'-dimethyl carbamide)diphenyl methane and polysulphone. The method of making binder for prepregs involves mixing components with pre-dispersed dicyandiamide, bis(N,N'-dimethyl carbamide) in a portion of low molecular weight epoxy-diane resin, wherein high molecular weight epoxy resin and polysulphone are fused with the remaining portion of the low molecular weight epoxy-diane resin, the epoxy-novolac resin and the tetrabromodiane-based resin at temperature of 135-155°C, and then merged with the obtained dispersion at temperature of 55-65°C. The prepreg contains epoxy binder and fibre filler. A three-layer panel has a middle layer of a polymer honeycomb laminate and covers made from the prepreg.

EFFECT: obtaining preparations having self-extinguishing and self-adhesive properties for making fireproof honeycomb panels with high resistance to uniform tearing and delamination of cells from the covers, having low power consumption and high manufacturability.

5 cl, 3 tbl, 5 ex