POWDER COATING COMPOSITIONS

• Main Author: CHANG, YEONG-HO
• Format: Patent
• Language: English
• Published: 30.05.1991
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; 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 MATERIALS THEREFOR; WOODSTAINS

Disclosed are thermosetting, powder coating compositions comprised of semi-crystalline polyesters and certain adducts of the 1,3-diazetidine-2,4-dione dimer of isophorone diisocyanate which are readily curable at temperatures and times commonly used to cure (cross-link) powder coatings. When using equivalent curing conditions, the disclosed coating compositions exhibit a higher degree of cross-linking than do combinations of amorphous polyesters and the adducts of the 1,3-diazetidine-2,4-dione dimer of isophorone diisocyanate. L'on décrit des compositions de revêtement par poudre thermodurcissables comprenant des polyesters semi-cristallins et certains produits d'addition du dimère du 1,3-diazétidine-2,4-dione du diisocyanate d'isophorone qui se polymérisent facilement aux températures et durant des temps utilisés généralement pour traiter (réticuler) les revêtements par poudre. Lorsque l'on utilise des conditions de traitement équivalentes, les compositions de revêtement décrites présentent un degré plus élévé de réticulation que les combinaisons de polyesters amorphes et les produits d'addition du dimère de 1,3-diazétidine-2,4-dione du diisocyanate d'isophorone.