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UV-curable hyperbranched star polymer and its preparation method and use

A technology of hyperbranched polymer and star polymer, used in coatings, automobiles and medical fields, can solve the problems of increasing cross-linking steric hindrance, reducing the stability and resistance of paint film, reducing cross-linking steric hindrance, reducing Viscosity, dosage reduction effect

Active Publication Date: 2019-10-08
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the spherical structure of hyperbranched polymers increases the crosslinking hindrance to a certain extent, resulting in unreacted redundant functional groups, and unreacted active functional groups will reduce the stability and resistance of the paint film. Therefore, hyperbranched polymer coatings have certain limitations

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  • UV-curable hyperbranched star polymer and its preparation method and use
  • UV-curable hyperbranched star polymer and its preparation method and use
  • UV-curable hyperbranched star polymer and its preparation method and use

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Embodiment 1

[0052] The preparation method of the UV curing hyperbranched star polymer coating of the present embodiment comprises the steps:

[0053] (1) Preparation of graft hyperbranched polymer:

[0054] Take the preparation method when the degree of polymerization of polycaprolactone is 20 as an example. Such as figure 1 As shown, the fourth generation hyperbranched polyester H 40 (0.800g, containing 7.10mmol hydroxyl group) and ε-caprolactone (16.0g, 142mmol) purified by vacuum distillation were added to the reaction flask, under nitrogen atmosphere, make H 40 Completely dissolve in ε-caprolactone, heat up to 130°C, add catalyst Sn(Oct) 2 , the molar ratio of the catalyst to the hydroxyl group contained in the hyperbranched polyester is 1:20, and the ring-opening polymerization reaction is initiated, stirred, and reacted for 5 hours to obtain a viscous liquid. After cooling to room temperature, add tetrahydrofuran to the reaction flask to dissolve, precipitate in 400mL cold metha...

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Abstract

The invention relates to the technical field of coatings, and provides a hyperbranched star-like polymer capable of ultraviolet light curing and a preparation method and application thereof. The hyperbranched star-like polymer capable of ultraviolet light curing comprises a hyperbranched polymer core and a linear polymer arm, wherein the hyperbranched polymer core is connected with the linear polymer arm through a chemical bond; and the terminal hydroxyl group of the hyperbranched star-like polymer is modified into a group containing carbon-carbon double bonds. The hyperbranched star-like polymer provided by the invention has the capacity of rapid ultraviolet light curing, and the hyperbranched star-like polymer combines the advantages of the hyperbranched polymer and the linear polymer under the condition that the degree of polymerization of the linear polymer is appropriate, so that the leveling property, curing rate, hardness, adhesive force, tolerance and the like of the coating are improved, and the hyperbranched star-like polymer is expected to be applied to the fields of automobiles, medical treatment and the like in consideration of good adhesive force and high biological degradability.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method, performance characterization and application prospect of a UV-cured hyperbranched star polymer coating. The hyperbranched star polymer coating is expected to be used in the fields of automobiles and medical treatment. Background technique [0002] UV-curable coatings are energy-saving and environmentally friendly coatings developed in the 1960s. Due to their advantages such as fast curing speed, low solvent content, low energy consumption and wide application range, research on UV-curable coatings has been carried out in recent years. and applications are growing year by year. [0003] UV-curable coatings are usually prepared using linear oligomers, and more reactive diluents are added to reduce the viscosity, while reactive diluents increase the toxicity and pollution of the coating. In recent years, due to its unique structural characteristics, hyperbran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G63/08C08G63/85C08G63/78C09D167/07
Inventor 陈玉颖朱蕴吉王楠金鑫童刚生
Owner SHANGHAI JIAOTONG UNIV
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