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Polyurethane/polyacrylate copolymer modified by organic fluoride and ultraviolet curing coating prepared by polyurethane/polyacrylate copolymer

A technology of polyacrylate and polyurethane prepolymer, applied in the direction of coating, can solve the problems such as the inability to effectively improve the performance of the coating film and the poor compatibility of fluorine-containing small molecules, and achieve outstanding wear resistance and temperature resistance, Reduced surface energy, improved durability and chemical resistance

Active Publication Date: 2013-04-24
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although physical doping of fluorine-containing substances can achieve the effect of reducing surface energy, the compatibility between fluorine-containing small molecules and resins is poor. With the extension of use time, phase separation is prone to occur and the membrane cannot be effectively functioned. Coating performance cannot be effectively improved

Method used

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  • Polyurethane/polyacrylate copolymer modified by organic fluoride and ultraviolet curing coating prepared by polyurethane/polyacrylate copolymer
  • Polyurethane/polyacrylate copolymer modified by organic fluoride and ultraviolet curing coating prepared by polyurethane/polyacrylate copolymer
  • Polyurethane/polyacrylate copolymer modified by organic fluoride and ultraviolet curing coating prepared by polyurethane/polyacrylate copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of organic fluorine-modified polyurethane prepolymer: In parts by weight, take 100 parts of polyether diol N210 (relative molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, heat and stir to 60°C Then, 34 parts of toluene diisocyanate (TDI) was added and reacted for 3 hours to obtain a polyurethane prepolymer. Then add 21 parts of octafluoropentanol, continue to react at 60°C for 4 hours, then take a sample for testing, the results of its infrared spectrum show that at 3335cm -1 The -NH- stretching vibration peak appeared at 1730cm -1 The carbonyl stretching vibration peak appeared at 3650cm -1 The O-H stretching vibration peak disappeared, indicating that the isocyanate group of toluene diisocyanate reacted with polyether diol, and then the terminal -NCO reacted with the hydroxyl group of octafluoropentanol to obtain partially octafluoropentanol-capped polyurethane Prepolymer PU1.

[0038] (2) Preparation of (meth)acryla...

Embodiment 2

[0043] (1) Preparation of organic fluorine-modified polyurethane prepolymer: In parts by weight, take 100 parts of polyether diol N210 (relative molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, heat and stir to 80°C Then, 34 parts of toluene diisocyanate (TDI) was added and reacted for 3 hours to obtain a polyurethane prepolymer. Then add 21 parts of octafluoropentanol, react at 80°C for 4 hours, then take a sample for testing, the results of the infrared spectrum show that at 3335cm -1 N-H stretching vibration peak appeared at 1730cm -1 The carbonyl stretching vibration peak appeared at 3650cm -1 The O-H stretching vibration peak disappears, indicating that the isocyanate group of toluene diisocyanate reacted with polyether diol, and then the terminal -NCO reacted with the hydroxyl group of octafluoropentanol, indicating that a part of octafluoropentanol-capped Polyurethane prepolymer PU1.

[0044] (2) Preparation of (meth)acrylate prepolym...

Embodiment 3

[0049] (1) Preparation of organic fluorine-modified polyurethane prepolymer: In parts by weight, take 100 parts of polyether diol N210 (relative molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, heat and stir to 60°C Then, 34 parts of toluene diisocyanate (TDI) was added and reacted for 3 hours to obtain a polyurethane prepolymer. Then add 21 parts of octafluoropentanol, continue to react at 60°C for 4 hours, then take a sample for testing, the results of its infrared spectrum show that at 3335cm -1 N-H stretching vibration peak appeared at 1730cm -1 The carbonyl stretching vibration peak appeared at 3650cm -1 The O-H stretching vibration peak disappears, indicating that the isocyanate group of toluene diisocyanate reacted with polyether diol, and then the terminal -NCO reacted with the hydroxyl group of octafluoropentanol, indicating that a part of octafluoropentanol-capped Polyurethane prepolymer PU1.

[0050] (2) Preparation of (meth)acryl...

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Abstract

The invention belongs to the field of coatings, and particularly relates to a polyurethane / polyacrylate copolymer modified by organic fluoride and an ultraviolet curing coating prepared by the polyurethane / polyacrylate copolymer. A method for preparing the polyurethane / polyacrylate copolymer modified by organic fluoride comprises the following steps: 1), preparing a polyurethane prepolymer modified by organic fluoride; 2), preparing a (methyl) acrylate prepolymer; and 3), preparing the polyurethane / polyacrylate copolymer modified by organic fluoride. A method for preparing an ultraviolet curing agent by taking the polyurethane / polyacrylate copolymer modified by organic fluoride as a raw material comprises the steps that taking 100-107 parts of polyurethane / polyacrylate, 50-68 parts of an reactive diluent, 13-18 parts of a photoinitiator and 8-16 parts of an auxiliary; stirring fully for 5-15 minutes until all the materials are mixed uniformly; and obtaining the polyurethane / polyacrylate copolymer modified by organic fluoride and the ultraviolet curing coating prepared by the polyurethane / polyacrylate copolymer.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an organic fluorine-modified polyurethane / polyacrylate and a UV-curable coating prepared therefrom. technical background [0002] UV curing materials are valued at home and abroad for their advantages of fast curing, low pollution, energy saving and high efficiency, and are widely used in metal, wood, plastic coating, ink printing, fabric printing, optical fiber coating, etc. Unsaturated resin is the main substance of UV curing film formation, which determines the main properties of the film. Polyacrylate is widely used in light-curing materials due to its good heat resistance, weather resistance, corrosion resistance, and high adhesion. However, due to its high surface energy, it suffers from high stress, brittleness, and fatigue resistance. Poor resistance, water and oil resistance and other shortcomings. Polyurethane has good flexibility, high elasticity, temperature resistance and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G18/38C08F220/14C08F220/18C08F220/32C08F220/28C08F8/14C09D187/00
Inventor 刘伟区王红蕾
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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