Patent ID: 6605685
Filing Date: 2003-08-12
Classification: B32B,C08G,C08L

Abstract:
A resin for use in making honeycomb sandwich panels that are located in situations where low smoke generation is required during burning, said resin being made by reacting formaldehyde with a modified phenol composition in the presence of a catalyst for a sufficient time and at a sufficient temperature to form a resole resin which is suitable for use in making said honeycomb sandwich panels, said modified phenol composition comprising from 20 to 80 weight percent of a phenol and from 20 to 80 weight percent of a low smoke producing compound selected from the group consisting of 4,4â€²-dihydroxydiphenyl sulfone, 3-3â€²-dihydroxydiphenyl sulfone, biphenol, and bisphenol ethers.