PHENOL-MODIFIED LIGNIN RESIN, METHOD FOR PRODUCING SAME, RESIN COMPOSITION, RUBBER COMPOSITION, AND CURED PRODUCT

摘要

Provided is a phenol-modified lignin resin having improved curing properties and excellent flexural strength, or a phenol-modified lignin resin having a rubber-reinforcing effect. One aspect of the present invention relates to a phenol-modified lignin resin obtained by reacting a lignin, a phenol compound and an aldehyde in the presence of an acid. In one or more embodiments, the number average molecular weight of the lignin is 100-5000 and the molar ratio (F/P) of the aldehyde (F) and the phenol compound (P) in the reaction is 0.4-1.5. In other embodiment(s), the phenol-modified lignin resin is used to reinforce a rubber.