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POSS/polyurethane aqueous composite paint and preparation method thereof

A composite coating and polyurethane technology, used in polyurea/polyurethane coatings, coatings, latex paints, etc., can solve the problems of poor suspension stability and rheology, affect the performance of water-based composite coatings, and large specific surface area, and achieve storage stability. Good properties, excellent UV resistance, and high film quality

Active Publication Date: 2008-08-27
SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nano-silica emulsion uses 5-15% surfactant, which will inevitably seriously affect the performance of the water-based composite coating, and the reaction steps are many, the cost is high, and the application is limited.
Chinese patent CN101007911A has reported another kind of water-based paint and its manufacture method, and silicon dioxide can reach 10-18% of the total weight of water-based paint in this emulsion, and the product has adopted very trace dispersant (<0.1%), effectively avoids The impact of high additive content on product performance, but the suspension stability and rheological properties of the product are poor
POSS has the characteristics of large specific surface area, low density, and high thermal and mechanical stability. If it is compounded and modified with water-based polyurethane coatings, it will inevitably bring new breakthroughs in issues such as dispersion, density, and coating. There is no public literature report and patent application about POSS / waterborne polyurethane organic-inorganic composite waterborne coating and its preparation method

Method used

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  • POSS/polyurethane aqueous composite paint and preparation method thereof
  • POSS/polyurethane aqueous composite paint and preparation method thereof
  • POSS/polyurethane aqueous composite paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 17.7g of distilled water into a 250mL round bottom flask containing 10g of trichloromethylsiloxane and 100mL of acetone under stirring conditions, raise the temperature to 50°C, and reflux the solution for 48 hours. After the reaction, the collected white solid was washed with acetone, filtered and dried in vacuum at 45°C for 8 hours, then suspended with 20 times the weight of pyridine and stirred overnight, and finally the pyridine solution was poured into an equal volume of concentrated hydrochloric acid and ice The precipitate was collected, washed with water until neutral, and dried under vacuum at 45 °C overnight. Finally, after exhaustive extraction with diethyl ether, the unblocked POSS was obtained.

[0028] Mix 4.0g of the above-mentioned uncapped POSS, 2g of silane coupling agent KH-550 and 20mL of tetrahydrofuran evenly, control the temperature at 55°C, then add 5mL of triethylamine and 60mL of tetrahydrofuran, and after the reaction time lasts for 36 hou...

Embodiment 2

[0032] Same as Example 1, but the ratio 100:1:1:100 of isocyanate-terminated polyurethane prepolymer, POSS, dibutyltin dilaurate and acetone was changed to 100:2:1:100.

[0033] The coating performance of this POSS / polyurethane water-based composite coating is shown in Table 1, and its particle size distribution is shown in Table 1. figure 2 , its thermal properties and UV-visible transmittance are shown in image 3 and Figure 4

Embodiment 3

[0035] Same as Example 1, same as Example 1, but the ratio 100:1:1:100 of isocyanate-terminated polyurethane prepolymer, POSS, dibutyltin dilaurate and acetone is changed to 100:5:1:100 .

[0036] The film properties of the POSS / polyurethane water-based composite coating are shown in Table 1.

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Abstract

The invention relates to a POSS / polyurethane water compound paint and the process for preparation, the water compound paint is prepared by the following process, firstly, preparing POSS which is not capped with a hydrolysis method, secondly, adopting silane coupling agent KH-550 to cap and get a POSS which contains amido group, and finally, chemically compounding POSS and water polyurethane dispersion to prepare a POSS / polyurethane water compound paint. The water compound paint of the invention has the advantages of excellent indoor temperature storage property, degree of hardness and waterproof property, and fire-resisting property and anti-ultraviolet light property are excellent. The process for preparation of the invention has the advantages of convenient and simple technique, high film coating quality, low production cost and extend application prospect and the like, which has no pollution to environment, the water paint is a new generation environmental-friendly high-performance chemical product, which can be applied in the fields such as automobile coating, wood coating, construction, office furniture, leather, textile finishing, pigment printing and mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of water-based paint preparation technology, and in particular relates to a POSS / polyurethane water-based composite paint and a preparation method thereof. Background technique [0002] Because water-based polyurethane uses water as the dispersion medium, it not only has some important performance characteristics of solvent-based polyurethane, but also has the advantages of low volatile organic compounds, non-toxic, non-flammable, non-polluting, energy-saving, safe and reliable, etc., so in recent years to develop rapidly. However, the waterborne polyurethane coating films currently prepared need to be further developed in terms of water resistance, solvent resistance and physical and mechanical properties. In order to improve and enhance the comprehensive performance of waterborne polyurethane coatings and expand its application range, it is necessary to carry out compound modification on waterborne polyur...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D5/02C09D183/04
Inventor 杨正龙秦深浦鸿汀
Owner SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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