MIXED TANNIN-PHENOLIC FOAMS

摘要

Disclosed are foam compositions and processes to form mixed tannin-phenolic foams. The process comprises forming a phenolic resole by mixing a phenol with a first monomer at a temperature in the range of room temperature to 90 °C, wherein the first monomer comprises formaldehyde, paraformaldehyde, furfural, glyoxal, acetaldehyde, 5-hydroxymethylfurfural, 5-furandicarboxylic aldehyde, difurfural (DFF), or mixtures thereof. The process also comprises adding a tannin to the phenolic resole to form a mixed-resin, wherein the phenol, the tannin, and the first monomer are present in a weight ratio 1:0.05:0.3 to 1:3:3.