Water-based modified organic silicon high-temperature-resistant anticorrosive paint and preparation method thereof
A water-based modified anti-corrosion coating technology, applied in anti-corrosion coatings, fireproof coatings, coatings, etc., can solve the problems of low shielding effect of corrosive media, lower heat resistance limit of coatings, and increase repair rate, so as to avoid participation in condensation and Coupling reaction, good hydrolytic stability, and the effect of relieving curing shrinkage
Active Publication Date: 2022-05-24
NANJING CHANGJIANG PAINT
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Problems solved by technology
[0008]
(3) For water-based pure silicone products, the curing temperature is too high (200-250°C)
After water-based, coating companies must carry out equipment transformation on the drying line, which is costly and consumes a lot of production energy; if the production process is adopted at room temperature and self-drying (after the workpiece is served at high temperature and then cured at the working temperature), the coating has poor water resistance, Low shielding effect of corrosive media, low hardness, easy to stick back, which can easily cause workpiece rust and coating damage, and the repair rate is significantly improved
[0009]
(4) For water-based modified silicone products (such as: epoxy modification, polyester modification, polyacrylate modification), if the modification ratio is too low, the corrosion protection performance of the coating under self-drying conditions cannot be solved Problem: If the modification ratio is too high, the heat resistance limit of the coating will be significantly reduced (usually the heat resistance temperature is not higher than 300°C), and it will also affect the high temperature service life, resulting in high temperature yellowing, pulverization, cracking and other problems
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preparation example Construction
[0046] (1) Preparation of modified titanate catalyst:
[0047] Add water, nonylphenol polyoxyethylene ether, dodecynediol polyoxyethylene ether into the reactor, stir evenly; The mixed solution of oxygen resin, xylene and acetone was dropped into the reactor and dispersed at high speed; the temperature was raised to 40-50 °C, and the xylene and acetone were removed under reduced pressure; cooled and dispersed at high speed until the system formed a uniform and stable oil-in-water emulsion .
[0048] (2) Preparation of water-based modified silicone high temperature anti-corrosion coating:
[0049] Add water, wetting and dispersing agent, and dimethylethanolamine into the paint mixing kettle, and stir evenly; add sericite, silicon whisker, modified phosphate hydrate, bentonite, and defoamer, and disperse at high speed until it is uniform and free of powder. , No agglomeration; transfer to a sand mill, and grind until the fineness of the slurry is less than 40μm.
[0050] Add ...
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The invention discloses a water-based modified organic silicon high-temperature-resistant anticorrosive coating which is suitable for various metal substrate surfaces and has excellent high-temperature resistance, corrosion resistance, impact resistance and shock cooling resistance. The coating is a water-based single-component product, can be cured at room temperature and is prepared from phenyl methyl silicone resin emulsion, nano sol modified silicone emulsion, single-component water-borne epoxy resin, a modified titanate catalyst, aluminum paste, modified phosphate hydrate, high-temperature-resistant filler, auxiliaries and water. The coating is convenient to construct and low in VOC emission during coating, and is an excellent thermal protection coating.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to a one-component, high temperature resistance, excellent adhesion, good corrosive medium shielding effect, and room temperature-curable water-based modified silicone high-temperature anti-corrosion coating and a preparation method thereof. Background technique [0002] High temperature service is a long-term problem for metal devices such as high temperature reactors, gas turbines, automobile mufflers, exhaust pipes, and heat exchangers. The high temperature working environment will intensify the chemical reaction between the metal and the oxygen, phosphorus, nitrogen, etc. in the air, forming metal oxides, causing the metal to corrode and fall off, resulting in the thinning of the material, loss of mechanical properties, and even damage. Therefore, the study of metal surface thermal protection technology is of great significance to prevent high-temperature oxidation of metal mat...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C09D183/04C09D5/10C09D5/18C09D7/62C09D7/65
CPCC09D183/04C09D5/103C09D5/18C09D7/62C09D7/65C08K2003/0812C08K2003/328C08L2201/02C08L2201/08C08L83/04C08L63/00C08K3/08C08K9/10C08K3/34C08K3/32C08K5/521C08K13/06
Inventor 陈钊聪刘保磊张卫中
Owner NANJING CHANGJIANG PAINT