Super weatherability nano-compound modified polyester powder coating and preparation method thereof
A nano-composite, powder coating technology, applied in polyester coatings, powder coatings, coatings, etc., to achieve the effects of easy popularization and application, improved weather resistance, and improved weather resistance
Inactive Publication Date: 2013-09-04
SICHUAN UNIV +1
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- Application Information
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Problems solved by technology
[0006] However, in this inorganic nano-powder modification system, there will still be a small part of ultraviolet light absorbed by the related groups in the powder coating, causing a chain aging degradation reaction of the resin
Method used
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Effect test
Embodiment 1
[0045] The powder coating formula is:
[0046] Element polyester resin Triglycidyl isocyanurate Titanium dioxide Precipitated barium sulfate Nano TiO 2 Nano SiO 2 Nano ZnO UV-1164 Other additives Weight (kg) 45 3.39 22 20.61 0.3 — — 0.15 8.55
Embodiment 2
[0048] The powder coating formula is:
[0049] Element polyester resin Triglycidyl isocyanurate Titanium dioxide Precipitated barium sulfate Nano TiO 2 Nano SiO 2 Nano ZnO UV-1577 Other additives Weight (kg) 55 4.14 20 12.66 0.32 0.08 — 0.2 7.6
Embodiment 3
[0051] The powder coating formula is:
[0052] Element polyester resin Triglycidyl isocyanurate Titanium dioxide Precipitated barium sulfate Nano TiO 2 Nano SiO 2 Nano ZnO UV-1164 UV-1577 Other additives Weight (kg) 63 4.74 18 6.16 0.24 0.06 0.75 0.75 7.65
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Abstract
The invention discloses super weatherability nano-compound modified polyester powder coating and a preparation method thereof. The invention is characterized in that 0.1 to 0.4 portion of inorganic nano-powder treated by an ultra-high speed mixing-high energy grinding surface modification, 0.05 to 0.4 portion of organic ultraviolet light absorbent, and 2 to 5 portions of powder coating basic polyester resin are squeezed for pelleting by premixing and melting. 2 to 6 portions of the obtained master grains and 32 to 66 portions of polyester resin, 3 to 8 portions of firming agent, 15 to 30 portions of inorganic fillings and 2 to 10 portions of other addition agents are prepared into the super weatherability nano-compound modified polyester powder coating by the working procedures of pre-mixing, melting and squeezing, cooling, cracking, fine cracking and grading and sieving. The weatherability thereof is improved by 3.5 to 13.7 times than the weatherability of common unmodified polyester powder coating; meanwhile the mechanical properties like coating adhesive force, impact resistance and rigidity as well as the chemical mediator resistant performances like hydrochloric acid resistance, boiling water resistance and solvent resistance are also improved to a certain extent. The invention can not obviously increase the cost; the production technique flows of the modified coating and production devices are basically unchanged; the achievement is easy to be popularized and applied.
Description
technical field [0001] The invention belongs to the field of powder coatings. In particular, it relates to a super-weather-resistant nano-composite modified polyester powder coating and a preparation method thereof. Background technique [0002] Powder coatings are different from traditional solvent-based coatings. They are solid powders that do not contain organic solvents (VOC) or water. They are widely used in the fields of household appliances, automobiles, office appliances, steel and construction in industry. Powder coatings are gradually replacing traditional solvent-based coatings due to their advantages of high inorganic content, no pollution and energy saving. With the advancement of technology and the development of the market, the application of outdoor powder coatings has attracted more and more attention. Powder coatings for outdoor use are divided into two categories, thermosetting and thermoplastic, according to the different base resins, of which thermoset...
Claims
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IPC IPC(8): C09D167/00C09D5/03
Inventor 郭刚黄婉霞施奇武徐良根王玉忠涂铭旌
Owner SICHUAN UNIV