High-hardness end-capped one-component baking type finishing coat resin and preparation method and application thereof

Abstract

The invention relates to a resin. The resin is prepared by esterifying and copolymerizing 12-22 w / w% of diol, 1-9 w / w% of ternary alcohol or higher alcohol, 32-37 w / w% of acid or anhydride, 1-6 w / w% of E10P and 2-4 w / w% of an end-capping gent and then adding 36-39 w / w% of a solvent for dilution, wherein the sum of the components is 100%. The provided resin is compounded with auxiliaries, pigmentsand solvents to prepare one-component paint, and the paint is used as a finishing coat to be applied in automotive coating with three coatings, namely the primer, the finishing coat and the varnish; the hardness of an automotive paint surface is improved, and the occurrence of scratching of the paint surface is effectively avoided.

Description

technical field [0001] The invention relates to an end-blocking resin and a paint containing the resin, in particular to a one-component color paint containing the resin, which has high hardness and is used in three-coat automobile bumper top paint. Background technique [0002] As we all know, in order to be beautiful and protect the car, the surface of the car will be painted with the color that the user likes. Ordinary paint is the most common paint used for automobiles. It is characterized by low cost and simple process, but its surface hardness is not high, and it is particularly easy to scratch. Therefore, there is a need to increase the hardness of automotive paints. [0003] Wang Changgeng, School of Chemical Engineering, Tianjin University, "Development of High-Performance Polyester Automotive Topcoat" synthesized ultra-short oil resin and tertiary carbonic acid glycidyl ester modified polyester resin through the blending of two resins, and used amino curing to mak...

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Problems solved by technology

[0003] Wang Changgeng, School of Chemical Engineering, Tianjin University, "Development of High-Performance Polyester Automotive Topcoat" synthesized ultra-short oil resin and tertiary carbonic acid glycidyl ester modified polyester resin through the blending of two resins, and used amino curing to make it with high performance. Decorative, high weather resistance high solid automotive topcoat, the process is complex, need to synthesize two resins, and the molecular weight difference between alkyd resin and acrylic resin is very large, it is easy to cause unstable gloss of the paint film, and the process It is also necessary to add amino curing during the preparation of the topcoat; Chinese patent application CN101974132A "High fullness, high solids normal temperature quick-drying automotive paint based on modified acrylic resin" adopts alkyd resin synthesized by unsaturated fatty acid and styrene and other monomers Synthesis of modified acrylic resin by body reaction, because styrene is easy to polymerize at room temperature, when the content of styrene and the content of unsaturated fatty acid synthesized alkyd resin is 1:1 or above, it is easy to gel, and the patent The OH% of the solid hydroxyl group in the medium is as high as 3%. Even if a drier is added, it is impossible to cure completely at room temperature without adding a curing agent or amino curing agent, and the exposed high hydroxyl group will also affect the paint. water resistance

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