公开(公告)号：US20230331945A1

公开(公告)日：2023-10-19

申请号：US18044146

申请日：2021-09-08

Applicant: Von Roll Schweiz AG

Inventor： Fiorenzo LENZI ,  Nicolas MULLOT ,  Markus RUDIN ,  Dimitri MEIER

IPC: C08J5/24 ,  C08K5/5313 ,  B32B5/02 ,  B32B5/26 ,  B32B37/18 ,  B32B19/02 ,  B32B19/06

CPC classification number: C08J5/244 ,  C08J5/245 ,  C08J5/241 ,  C08K5/5313 ,  B32B5/024 ,  B32B5/263 ,  B32B37/18 ,  B32B19/02 ,  B32B19/06 ,  C08J2363/00 ,  C08J2383/04 ,  B32B2260/023 ,  B32B2260/046 ,  B32B2307/718 ,  B32B2264/1026 ,  B32B2307/3065 ,  B32B2305/076 ,  B32B2305/188 ,  B32B2605/18 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2260/025 ,  B32B2264/201 ,  B32B2305/30

Abstract: The invention relates to a multilayer prepreg comprising a first and a second fiber prepreg, one or two micaceous prepregs and B staged thermosetting resin, which may be different for each layer or identical. The micaceous prepregs are positioned on the top (outside) of the fiber prepregs. There may be plurality of further fiber prepregs. The micaceous prepregs preferably comprise mica flakes in the form of a mica paper. The use of such prepreg as surfacing layer at the top of a composite material or near the top of a composite material can determine an improvement in burn-through and fire retardancy performance of composite materials. It is also disclosed a cured composite panel, such as an aircraft part, obtainable by curing the multilayer prepreg to a C stage.