A kind of silicone modified polyether polyol and its preparation method and application

A polyether polyol, silicone technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of practical limitations, can not achieve super-hydrophobicity, etc., achieve good stability, good extension, strong adhesion Effect

Active Publication Date: 2020-03-31
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the practicality is greatly limited
Without the help of fluorine-containing materials, existing conventional polyethers cannot achieve superhydrophobicity

Method used

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  • A kind of silicone modified polyether polyol and its preparation method and application
  • A kind of silicone modified polyether polyol and its preparation method and application
  • A kind of silicone modified polyether polyol and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the present embodiment, the preparation of silicone-modified self-cleaning polyurethane water-based coating comprises the following steps:

[0022] Step 1. Addition reaction of allyl glycidyl ether and heptamethyltrisiloxane (molar ratio: 1:1), using chloroplatinic acid as a catalyst, and reacting for 6 hours at a reaction temperature of 80°C under nitrogen protection , to obtain modified allyl glycidyl ether. Chloroplatinic acid is added in the form of a solution, the solvent is toluene, the concentration of chloroplatinic acid in the solution is 20ppm, and the amount of chloroplatinic acid solution added is 50% of the total mass of the material, while the reaction is condensed and refluxed, after the reaction is finished, the distillation Remove solvent.

[0023] Step 2, adding propylene oxide and diethylene glycol to the modified allyl glycidyl ether obtained in step 1, the molar ratio of allyl glycidyl ether to diethylene glycol is 2:1, in the reaction kettle C...

Embodiment 2

[0031] In the present embodiment, the preparation of silicone-modified self-cleaning polyurethane water-based coating comprises the following steps:

[0032] Step 1, polymerize 1mol allyl glycidyl ether, 11mol propylene oxide and 1mol ethylene glycol, the reaction conditions are potassium hydroxide catalysis (addition amount is 0.1% of the total mass of the material), nitrogen protection, 100 ° C reaction 6h to obtain polyether diol.

[0033] In step 2, add 1 mol of heptamethyltrisiloxane to the polyether diol obtained in step 1. The reaction conditions are catalyzed by chloroplatinic acid, protected by nitrogen, and reacted at 90°C for 5 hours. The chloroplatinic acid is in the form of a solution Add, solvent is xylene, and the concentration of chloroplatinic acid in solution is 50ppm, and the addition of chloroplatinic acid solution is 30% of material gross mass, carries out condensing reflux while reacting, after reaction finishes, distillation removes solvent, obtains mole...

Embodiment 3

[0038] In the present embodiment, the preparation of silicone-modified self-cleaning polyurethane water-based coating comprises the following steps:

[0039]Step 1. Addition reaction of allyl glycidyl ether and heptamethyltrisiloxane (molar ratio: 0.8:1), using chloroplatinic acid as catalyst, reacting for 7 hours at a reaction temperature of 60°C under nitrogen protection , to obtain modified allyl glycidyl ether. Chloroplatinic acid is added in the form of a solution, the solvent is isopropanol, the concentration of chloroplatinic acid in the solution is 3ppm, and the amount of chloroplatinic acid solution added is 90% of the total mass of the material, while the reaction is condensed and refluxed, the reaction ends The solvent was then distilled off.

[0040] Step 2, add propylene oxide and propylene glycol to the modified allyl glycidyl ether obtained in step 1, the molar ratio of allyl glycidyl ether to propylene glycol is 1:1, carry out polymerization reaction in the re...

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Abstract

Disclosed are an organosilicon modified polyether polyol as well as a preparation method therefor and an application thereof, relating to the technical field of polyurethane coating. The organosilicon modified polyether polyol has a structure comprising a structural unit consisting of organosiloxane and allyl glycidyl ether linked together by means of double-bond addition, and can be applied to the preparation of self-cleaning oily or waterborne polyurethane coatings. In the present invention, organosiloxane is introduced into the polyether polyol structure by means of double-bond addition; due to the unique umbrella structure, the polyether polyol can be better stretched; and the low surface energy of the siloxane in the coating can be migrated to the surface of the coating; thereby, the coating prepared with the modified polyether polyol has a surface with self-cleaning properties, and has good stability and strong adhesion.

Description

technical field [0001] The invention belongs to the technical field of polyurethane coatings, and more specifically relates to a silicone-modified polyether polyol and its preparation method and application. Background technique [0002] The superhydrophobic coating is completed by the synergy between the chemical composition of the coating surface and the surface structure. The surface can be constructed with low surface energy polytetrafluoroethylene, siloxane, etc., or introduce an air pillow-like structure with high surface roughness. , increasing its specific surface area. It absorbs a layer of air film on the rough surface to achieve the purpose of water repellency. According to the binary synergy theory, sol-gel method, vapor deposition method, template method, electrochemical method, ion sputtering method can be used to construct rough surface structure, and then low surface energy substances can be grafted to prepare superhydrophobic coating. At present, most supe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C09D175/08
CPCC08G65/2639C09D175/08
Inventor 陈军罗振扬马晓峰戴鹏武志鹏
Owner NANJING FORESTRY UNIV
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