One-component powder coating composition and substrate coated with such powder coating composition

• Main Authors: GONZALEZ ALVAREZ, MARIA JOSE, KITTLE, KEVIN JEFFREY
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention relates to a one-component powder coating composition comprising a curing system comprising a curable resin and one or more curing additives for curing the curable resin, wherein the powder coating composition comprises: - one powder coating component comprising the curable resin and the one or more curing additives; and - in the range of from 0.5 to 25 wt% of a dry-blended inorganic particulate additive consisting of inorganic components (i), (ii), and (iii), wherein component (i) is non-coated aluminium oxide or non-coated silica, component (ii) is aluminium hydroxide and/or aluminum oxyhydroxide, and component (iii) is silica, and wherein, if component (i) is non-coated silica, component (iii) does not comprise non-coated silica, wherein the dry-blended inorganic particulate additive comprises a first and a second silica wherein the first silica is a surface-treated silica with a negative tribocharge, and the second silica is non-coated silica or is a surface-treated silica with a positive tr