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High-reflective acrylic polyurethane coating composition

An acrylic polyurethane, high reflectivity technology, used in polyurea/polyurethane coatings, reflective/signal coatings, anti-corrosion coatings, etc., can solve the problems of reduced heat reflection effect, low resin solid content, low solid content, etc., to achieve VOC release Small, high solids content, the effect of increasing the solids content

Active Publication Date: 2015-02-25
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents CN 101205435A and CN 1583908A respectively disclose a solar heat reflective heat-insulating coating and a preparation method thereof. The purpose of heat-insulating reflection is achieved by using an undercoat chlorosulfonated polyethylene insulation layer and a top coat thermoplastic heat-reflective coating. However, the resins used are all thermoplastic resins, which have poor outdoor aging resistance and low solid content of the resin, resulting in large VOC emissions from the entire supporting system.
Chinese patent CN 1800283 discloses a heat-insulating coating and its application, which uses nanoporous SiO 2 and nano-iron oxide yellow to prepare colored heat-insulating reflective coatings, which have high heat reflectivity and good thermal insulation performance. The resins used are conventional polyester polyurethane resins, acrylic polyurethane resins and other systems. Although these resin systems are more outdoor aging than thermoplastic resins Good, but its disadvantage is that the solid content is generally not high, a lot of VOC is introduced and all nano-pigments are used, the particle size is small, the reflection of light waves in the visible region is large, and the reflection in the near-infrared region will be weakened. The reflection effect will be reduced accordingly

Method used

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  • High-reflective acrylic polyurethane coating composition
  • High-reflective acrylic polyurethane coating composition
  • High-reflective acrylic polyurethane coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation modified hydroxyacrylic resin of embodiment 1

[0026] ① Formula

[0027] In the modified hydroxyacrylic resin of every 100 mass parts, 25 mass parts of hydroxyacrylic resin S1196, 75 mass parts of modified resin CTR 6275, wherein: hydroxyacrylic resin S1196 is the product of Nuplex (China) company, and its weight-average molecular weight is 4000-5000, the solid content is 55-60wt%, the hydroxyl content is 2.3-2.6wt%, the viscosity measured by the rotational viscometer is 2400-3800mPa·s; the modified resin CTR 6275 is a product of CNOOC Changzhou Environmental Protection Coatings Co., Ltd., they It is made of functional monomers such as isobornyl methacrylate, cyclohexyl acrylate and glycidyl tert-carbonate as comonomers, with a weight average molecular weight of 2000-2500, a solid content of ≥80wt%, and a hydroxyl content of 4.0- 4.2wt%, the viscosity measured by the rotational viscometer is 2500-3000mPa·s.

[0028] ② Preparation method

[0029] In t...

Embodiment 2

[0030] Embodiment 2 prepares A component 1 (white, pigment base ratio 1.5)

[0031] ① Formula

[0032] In every 100 parts by mass of the A component, 40 parts of modified hydroxyacrylic resins made in Example 1, 39 parts of heat-reflecting pigments (including 26 parts of rutile TiO 2 ALTIRIS 550 and 13 parts rutile TiO 2ALTIRIS 800), 6 parts of airgel SJ 1800, 3 parts of additives (including 1 part of dispersant BYK 163, 0.5 parts of defoamer DF-220.5 parts of anti-sagging agent PLUS and 1 part of leveling agent EFKA 3777), 12 parts Parts of organic solvents (including 6 parts of xylene and 6 parts of butyl acetate).

[0033] ② Preparation method

[0034] In the dispersion tank, add modified hydroxyacrylic resin, organic solvent, dispersant, defoamer, stir evenly, add anti-sag agent PLUS, stir at high speed for 15 minutes, make anti-sag agent PLUS fully wet and disperse, then add Heat-reflecting pigments and aerogels are stirred evenly, then moved into a sand mill, and are...

Embodiment 3

[0035] Embodiment 3 prepares A component 2 (light yellow, pigment base ratio 1.5)

[0036] ① Formula

[0037] In every 100 parts by mass of the A component, 40 parts of modified hydroxyacrylic resins made in Example 1, 39 parts of heat-reflecting pigments (including 26 parts of rutile TiO 2 ALTIRIS 550, 13 parts of nickel titanium yellow PY-53), 6 parts of airgel SJ 1800, 3 parts of additives (including 1 part of dispersant BYK 163, 0.5 parts of defoamer DF-22, 0.5 parts of anti-sagging agent PLUS , 1 part of leveling agent EFKA 3777), 12 parts of organic solvents (including 6 parts of xylene and 6 parts of butyl acetate).

[0038] ② Preparation method

[0039] In the dispersion tank, add modified hydroxyacrylic resin, organic solvent, dispersant, defoamer, stir evenly, add anti-sag agent PLUS, stir at high speed for 15 minutes, make anti-sag agent PLUS fully wet and disperse, then add Heat reflective pigments and aerogels are stirred evenly, then moved into a sand mill, an...

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Abstract

The invention relates to a high-reflective acrylic polyurethane coating composition which comprises a component A and a component B in a mass part ratio of 20;3. The component A in 100 parts by mass comprises the following materials in part by mass: 30-50 parts of modified hydroxyl acrylic resin, 2-6 parts of auxiliaries, 35-45 parts of heat reflective pigments, 4-8 parts of aerogel and 10-15 parts of organic solvent. The component B in 100 parts by mass comprises the following materials in part by mass: 75-90 parts of polyisocyanate and 10-25 parts of organic solvent. The modified hydroxyl acrylic resin is obtained by cold-blending modified resin and hydroxyl acrylic resin in a mass part ratio of 1-3: 1; the solid content of the modified hydroxyl acrylic resin is greater than or equals to 75wt%; the particle size of heat reflective pigments ranges from 0.55 micron to 1.2 microns; the particle size of the aerogel ranges from 1 micron to 80 microns; the pore size of the aerogel ranges from 10 nanometers to 20 nanometers; and the heat conductivity coefficient of the aerogel is less than or equals to 0.015W / (m k). The polyisocyanate is one or more of HDI (hexamethylene diisocyanate) biuret, HDI trimer and IPDI (isophorone diisocyanate) trimer curing agents. The high-reflective acrylic polyurethane coating composition is high in reflective insulation quality; and the quantity of VOC (volatile organic compounds) of the high-reflective acrylic polyurethane coating component is low.

Description

technical field [0001] The invention relates to a high reflectivity acrylic polyurethane coating composition. Background technique [0002] Solar energy is a necessary condition for human survival and life, but strong radiation also brings many problems and inconvenience to industrial production and daily life. With the advent of a conservation-minded society and the aggravation of the global warming effect, materials with the ability to reflect solar heat and passive radiative cooling have attracted increasing attention. Especially on the outer surface of tanks and equipment such as chemical industry storage tanks and liquefied natural gas (LNG) storage tanks, if there is no protection of heat-reflective insulation materials, it will not only cause energy loss, but also may cause serious fires and explosions and other security incidents. Among the heat-reflecting and heat-insulating materials, the solar heat-reflecting coating is a simple and effective energy-saving mater...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/33C09D5/08C09D7/12C08G18/62
CPCC08G18/6216C08G18/79C08K3/22C08K7/26C08K2003/2237C09D7/61C09D175/04
Inventor 李敏马胜军徐科张伟丽王秀娟方健君
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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