Laundered amorphous reinforcing lignin

摘要: Lignin of improved reinforcing properties in polymers, is prepared by steps comprising: A. LAUNDERING CRUDE LIGNIN IN AN AQUEOUS MEDIUM UNTIL SUBSTANTIAL AMOUNTS OF NON-LIGNIN MATERIAL ARE SOLUBILIZED AND SEPARATED, B. REFORMING THE BY ONE (I) PRECIPITATING WITH ACID AT A PH about 2 to 3 at a temperature 88* 95*C; and (ii) conditioning wet lignin precipitate said pH temperature, C. WASHING PRECIPITATE TO REMOVE SOLUBLE DRYING RESULTING SOLIDS. Laundering additives have been used step (a), impurity dispersants (b). Polymer latices can be added before precipitation (b) the lignin-latex coprecipitated. The milled directly into rubber give ultimate tensile strengths least order 2,800 p.s.i. This also as reactive filler plastics.