POWDER COATING Russian patent published in 2016 - IPC C08G59/42 C08L63/00 C09D5/03 C09D163/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to a coating, formed by components based on both a Lewis acid and a Lewis base. Described is a particulate coating composition containing a mixture of two components: 1) extruded first component including at least one epoxy group-containing compound, at least one polycarboxyl polymer and at least one organic Lewis base, and 2) separately extruded second component containing at least one epoxy group-containing compound, at least one polycarboxyl polymer and at least one organic Lewis acid, where said polycarboxyl polymer is a carboxyl group-functionalised polyster; said Lewis acid is an organic phosphonium compound; said Lewis base is N-heterocyclic compound. Also described is a method of producing a particulate coating composition, preferably powder coating composition, including: A) separate extrusion of 1) a first component including at least one epoxy group-containing compound, at least one polycarboxyl polymer and at least one organic Lewis base, and 2) a second component containing at least one epoxy group-containing compound, at least one polycarboxyl polymer and at least one organic Lewis acid to form two separate granular materials; or B) mixing said granular materials and milling to form of powder coating, or milling said granular materials and mixing crushed grain materials with formation of powder coating, where said polycarboxyl polymer is a carboxyl group-functionalised polyester; said Lewis acid is an organic phosphonium compound; said Lewis base is N-heterocyclic compound. Described is a method of coating a substrate, involving coating of a substrate using said powder coating; described also is a method of solidifying a substrate coated with said powder coating at temperature from 100 to 160 °C or under effect of infrared radiation. Described is use of said powder coating when making semi-matt or matt cured powder coating.

EFFECT: low temperature-cured powder coating with low lustre, with improved mechanical properties and resistance to damages.

14 cl, 14 ex