Resin

From PyroWiki
Jump to: navigation, search

The use of various types of lignin has been widely studied in various resin application e.g. in phenol-formaldehyde resins. Often the viscosity, high molecular weight and added chemicals interfere in producing a resin with similar properties as a standard (fossil) phenol formaldehyde resin. The cracked character (relative low Mw, good solubility in various solvents and the absence of minerals or added chemicals make the use of pyrolytic lignin as a raw material in e.g. resol phenol-formaldehyde resins a very attractive application. Recently at BTG a procedure was developed in which fossil phenol in PF (phenol-formaldehyde) resins (resol) was substituted up to 75 wt% by the pyrolytic lignin and still met the D4 (NEN-EN 204/205) [1].