Polyester resin as well as preparation method and application thereof in wet-on-wet process

• Main Authors: XIE BENHONG, ZHANG HUAPING, XIE YONGBIAO, LIAO WEILIAN
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2021
• 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

The invention relates to polyester resin as well as a preparation method and an application thereof in a wet-on-wet process. The polyester resin comprises the following components in parts by weight: 100 parts of binary/polyhydric alcohol, 120-130 parts of binary/polybasic carboxylic acid and anhydride or ester thereof, and 70-85 parts of dimer acid. According to the polyester resin provided by the invention, a specific amount of dimer acid is introduced to replace original binary/polybasic carboxylic acid and derivatives thereof, so that the polyester resin is endowed with good affinity to base coats with various colors, direct construction can be performed under the condition that the base coats are not dried and cured, the phenomena of dissolution and repulsion to the base coats are avoided, and the wet-on-wet process is realized. 本发明涉及一种聚酯树脂及其制备方法和在湿碰湿工艺中的应用。该聚酯树脂，包括如下重量份数的组分：二元/多元醇100份，二元/多元羧酸及其酸酐或酯120～130份，二聚酸70～85份。本发明提供的聚酯树脂中引入特定量的二聚酸来代替原有的二元/多元羧酸及其衍生物，赋予聚酯树脂对各种颜色的底涂良好的亲和性，可以在底涂未经烘干固化的情况下，直接施工，对底涂无溶解和