After modification, the impact toughness of the phenolic resin, adhesion, mechanical strength, heat resistance, flame resistance, dimensional stability, curing rate, molding, etc., are improved. Therefore, according to the actual use, choose a different modified phenolic resin. 

After rosin, drying oil fatty acids, etc., and the action of changing the nature of the phenolic resin. The original can not readily soluble or insoluble in the vegetable oil or alcohol soluble or becomes soluble. Most amber solid. The main system for coatings, inks and adhesives. 

Modified phenolic resin main purpose is to improve its brittleness or other physical performance, enhance its bonding properties of fiber-reinforced materials and improve the molding process conditions, such as composite materials. Modified generally through the following channels: 

① blocked phenolic hydroxyl group. Phenolic hydroxyl group of phenolic resin in the resin manufacturing process generally do not participate in chemical reactions. The molecular chain of the resin left on the phenolic hydroxyl groups readily absorb water, the electrical properties, the alkali resistance and mechanical properties of the cured article may be decreased. At the same time easy to produce a phenolic hydroxyl group or a quinone structure under heat or other ultraviolet light, resulting in uneven color change. 

② introduction of other components. The introduction of a chemical reaction with the phenolic resin or its good compatibility with the components separated or surrounded by a hydroxyl group, so as to change the cure rate, the purpose of reducing the water absorption. The introduction of other polymer components can be both the advantages of the two polymer materials.Modified Amine Resin