ELECTRODEPOSITION COATING COMPOSITIONS AND PREPARATION THEREOF

• Main Authors: XING SUJIE, THANGVIJZAKU, PANKAJ, WANG LIN, THEIL HUBERT
• Format: Patent
• Language: Chinese; English
• Published: 28.06.2024
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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

The present invention provides a cathodic electrodeposition coating composition comprising (A) a cationic amino group-containing epoxy resin, and (B) a blocked polyisocyanate having a neutralized amine, the present invention relates to a partially blocked polyisocyanate obtainable or obtained by a process comprising the steps of: (i) reacting a polyurethane prepolymer containing isocyanate groups with at least one blocking agent selected from the group consisting of oximes, pyrazoles and active methylene compounds to provide a partially blocked polyisocyanate, the present invention relates to a process for the preparation of polyisocyanates, comprising (i) reacting a partially terminated polyisocyanate, (ii) reacting the remaining isocyanate groups in the partially terminated polyisocyanate with an amine compound having an active hydrogen to provide an amine-containing terminated polyisocyanate, and (iii) neutralizing the amine-containing terminated polyisocyanate with an acid, and (C) a curing catalyst. The