Classification of polyester resins for powder coatings

Polyester resin for powder coating can be classified into carboxyl type polyester and hydroxy type polyester according to its functional groups There are terminal or side carboxyl groups in the chain of carboxyl polyester It is the most widely used, both mixed powder coating and pure polyester powder coating are carboxyl polyester resin There are terminal or side hydroxyl groups in the molecular chain of hydroxy polyester resin It can be used with isocyanate curing agent or amino resin curing agent to make powder coating The powder coating obtained by mixing with isocyanate curing agent such as b-1530 is called polyurethane powder coating, and the powder coating prepared by combining with amino resin curing agent (powderlink-1174) resin should be called polyester amino powder coating instead of polyurethane powder coating Vestagon b-1530 curing agent is a kind of blocked isocyanate crosslinking agent, the main component of which is the partially trimer of isophorone diisocyanate blocked by caprolactam Powderlink-1174 is an amino resin cross-linking agent, the main component of which is tetramethoxymethylglycolurea.