Preparation method for one-component waterborne polyurethane transparent heat-insulating coating

A technology for water-based polyurethane and thermal insulation coatings, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of time-consuming and energy-consuming, complex process and technology, and achieve convenient construction, simple preparation process, and improved compatibility. Effect

Active Publication Date: 2013-10-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complex, time-

Method used

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Examples

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Example Embodiment

[0027] Example 1

[0028] Toluene diisocyanate (TDI) and polyoxypropylene glycol with a molecular weight of 2000 are dehydrated into a four-necked flask at a weight ratio of 1:4, protected by nitrogen, and added dibutyltin dilaurate (0.2% of the resin mass fraction), React at 80°C for 2 hours, add chain extender ethylene glycol and dimethylolbutyric acid (accounting for 4% of resin mass fraction) at 50°C, then react at 80°C for 4 hours; add methyl ethyl ketone (accounting for resin mass fraction 50 %) Reduce the viscosity of the system and cool to 30°C, add triethylamine (2.4% of the resin mass fraction) dropwise under high-speed stirring, react for 20 minutes, add dropwise silane coupling agent γ-(β-aminoethyl)aminopropyltrimethyl Oxysilane (accounting for resin mass fraction 2.5%), control it to drip within 1 hour, and react at 70°C for 2 hours; disperse nano-powder antimony tin oxide (accounting for resin mass fraction 10%) in water in advance, and ultrasound For 1 hour, add ...

Example Embodiment

[0029] Example 2

[0030] The diphenylmethane diisocyanate (MDI) and the polycarbonate polyol with a molecular weight of 2000 are dehydrated into a four-necked flask at a weight ratio of 1:5, protected by nitrogen, and triethylenediamine (accounting for 0.3% of the resin mass fraction) ), react at 70°C for 1 hour, add chain extender ethylene glycol and dimethylolpropionic acid (which account for 5% of the resin mass fraction) at 40°C, then react at 60°C for 4 hours; add methyl ethyl ketone (account for resin Mass fraction 45%) Reduce the viscosity of the system to 30°C, add triethylamine (2.5% of the resin mass fraction) dropwise under high-speed stirring, react for 10 minutes, add dropwise silane coupling agent γ-(2,3-propylene oxide) ) Propyl trimethoxysilane (accounting for 3% of the resin mass fraction), control it to drip within 1 hour, and react at 60°C for 2 hours; disperse the nano powder indium tin oxide (accounting for 8% of the resin mass fraction) in advance In water...

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PUM

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Abstract

The invention discloses a preparation method for a one-component waterborne polyurethane transparent heat-insulating coating. The method comprises the following steps of dehydrating a polyisocyanate and a macromolecular polyol according to a certain weight proportion; adding the dehydrated materials into a four-necked flask; introducing nitrogen for protection; then adding a catalyst, a chain extender and a silane coupling agent in order; dropwise adding deionized triethylamine with high-speed stirring after the reaction is finished; then adding a nano-powder dispersion liquid into a polyurethane prepolymer neutralized with the triethylamine with high-speed stirring; adding an acid and alkali neutralizer to adjust pH values after uniform distribution, and thus the waterborne polyurethane nano-powder composite emulsion is obtained; removing a solvent from the composite emulsion; and adding a flatting agent, a wetting agent, a defoaming agent and a thickening agent, so that a waterborne polyurethane nanocomposite coating can be prepared. The preparation method is simple in process and low in cost, and the coating is environment-friendly, fits the national environmental protection quality standard, and has excellent heat insulation performance and transparency.

Description

technical field [0001] The invention relates to a water-based coating, in particular to a preparation method of a one-component water-based polyurethane transparent heat-insulating coating. Background technique [0002] With the rapid development of society and the improvement of living standards, the living environment and the level of construction have also rapidly improved, and the proportion of various types of glass used has shown an obvious upward trend. Glass energy consumption accounts for an increasing proportion of the entire building energy consumption. While transparent glass brings good lighting, it also becomes a difficult problem for building external insulation. How to make glass both transparent and heat-insulating is of great significance to solve the energy consumption of glass in today's advocacy of energy conservation and environmental protection. At present, there are three main ways to solve the heat insulation of glass. One is to use heat insulation...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/06C09D7/12C08G18/66C08G18/38C08G18/12
Inventor 周海峰王化田兴友郑康吴钊峰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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