Evonik (formerly Degussa AG) SIVO 112, organic silane coupling agent Dynasylan SIVO 112, wood water oil dual hydrophobic treatment system overview:
Dynasylan ® SIVO 121 Wood Surface Impregnation Protective Agent is developed and produced by Evonik Degussa AG. It is a water-based multifunctional silane product that contains almost no organic volatile components. Whether it is raw wood or wood surfaces that have undergone varnish treatment and weathering, Dynasylan ® SIVO 121 Wood Surface Impregnation Protective Agent can significantly improve their surface hydrophobicity and oleophobicity.
Dynasylan ® SIVO 121 Wood Surface Impregnation Protective Agent Performance:
Dynasylan® SIVO 121 The protective agent for wood surface impregnation treatment does not contain organic solvents. Unlike other silicon-based functional silanes, it does not produce alcohols due to hydrolysis during its application. Dynasylan ® SIVO 121 wood surface impregnation treatment protectant contains a large amount of active silicon hydroxyl groups, which can form chemical coupling with the wood substrate and form a two-dimensional or three-dimensional high-density cross-linked network through cross-linking reaction. The fluorinated alkyl group contained in Dynasylan ® SIVO 121 wood surface impregnation treatment protectant results in a lower surface energy of the treated wood surface, thus exhibiting strong water oil dual hydrophobicity.
Evonik (formerly Degussa AG) SIVO 112, organic silane coupling agent Dynasylan SIVO 112, wood water oil dual hydrophobic treatment system application:
Dynasylan® SIVO 121 The wood surface impregnation treatment protective agent contains wood protective agent, which can be brushed, roller coated, or sprayed. During the spraying process, the formation of mist should be minimized as much as possible (HPLV (high-pressure low volume) spraying technology, air spraying process, etc. can be used). The continuous construction steps should adopt a "wet to wet" construction approach, as Dynasylan ® Once SIVO 121 dries, it immediately forms a strong water repellent effect. Therefore, the efficiency of the second round of construction will significantly decrease. Suggested concentration and dosage: To achieve the best effect and service life (transparent system, stability of QUV weathering test greater than 1500 hours), it is recommended to use 300 g/m2 Dynasylan ® SIVO 121 original solution. According to the absorbency of the wooden substrate, this amount can be achieved through one or multiple applications.
The usage amount is 70-150 g/m2 At that time, Dynasylan ® SIVO 121 wood surface impregnation treatment protectant can provide QUV stability for up to 300-900 hours to maintain its water oil dual hydrophobic surface activity (equivalent to 1-3 years of outdoor weathering under typical European climate conditions). We recommend using Dynasylan ® The minimum concentration of protective agent for SIVO 121 wood surface impregnation treatment is 1 part Dynasylan ® SIVO 121 requires one corresponding diluent (including organic solvents, water, and additives). The temperature for processing the substrate should be maintained between 5-50 ℃. Dynasylan ® SIVO 121 wood surface impregnation protective agent is sensitive to extreme cold and low temperatures. The frozen product will undergo flocculation and weaken its protective performance when thawed. Containing Dynasylan ® The wood protectant of SIVO 121 cannot be used on damp wood surfaces (recommended humidity below 18%). Dynasylan ® SIVO 121 wood surface impregnation protective agent has incomplete cross-linking on wet surfaces, making it impossible to achieve complete protective effects. To some extent, Dynasylan ® SIVO 121 wood surface impregnation treatment protectant can cause yellowing of light colored wood surfaces. And this will not affect the hydrophobicity and oleophobicity of the product. However, when surface color is used as an important indicator to evaluate colorless and transparent wood protectants, it must be carefully considered. As a fully crosslinked impregnating coating, Dynasylan ® SIVO 121 wood surface impregnating protectant has excellent weather resistance and can withstand various external climate conditions (such as UV radiation, wind and rain, and temperature changes), but its UV absorption ability is weak. The UV degradation of lignin can be delayed but cannot be completely inhibited, so the phenomenon of wood darkening under UV light can be achieved by using Dynasylan ® The delay of SIVO 121 wood surface impregnation treatment protective agent cannot ultimately eliminate this phenomenon. To achieve stronger UV resistance as expected, other UV absorbers need to be introduced into the product formula. It can be suggested to add pigments (such as iron oxide, which can achieve significant effects).
Dynasylan ® SIVO 121 Wood Surface Impregnation Treatment Protective Agent Process:
Dynasylan® SIVO 121 The wood surface impregnation treatment protective agent is suitable for hydrophobic and oleophobic modification of the wood surface, and can also be used as an ideal additive formula for transparent varnish. Once the surface of wood is treated accordingly, the surface energy will be greatly reduced, resulting in a significant water repellent effect on almost all types of liquids. This strong water oil dual hydrophobicity greatly reduces the adsorption of stains by wood and also reduces the growth of microorganisms (such as mold) on the surface of wood. Dynasylan ® SIVO 121 wood surface impregnation treatment protectant exhibits unique superiority on the substrate surface, and can also be added to the corresponding final product formula with sterilizing agents (such as anti blue agents) to effectively prevent dirt caused by microbial proliferation. In the future, this surface treatment will also have excellent weather resistance, mainly due to the stability of fluorosilane and the chemical reaction between silicon hydroxyl groups and the substrate, as well as the highly cross-linked siloxane network produced. These features enable Dynasylan ® The performance of SIVO 121 wood surface impregnation treatment protective agent is superior to any other ordinary organic fluorocarbon system.
Dynasylan® SIVO 121 The formulation of transparent varnish for wood surface impregnation treatment protective agent can greatly improve the outdoor weather resistance of wood when used on suitable wood surfaces. According to the German Industrial Standard (DIN EN ISO 11507), the QUV test (UV cyclic radiation at 55 ℃ (UVA-340), cyclic condensation at 45 ℃, and intermittent water flushing) showed that using approximately 100 g/m2 of Dynasylan ® The colorless transparent varnish of SIVO 121 wood surface impregnation treatment protective agent can form a water repellent effect that can last for more than 800 hours (equivalent to 2 years of outdoor climate conditions). Increasing the dosage to 300 g/m2 can further improve the duration of the water repellent effect. Despite its strong water oil dual hydrophobicity, Dynasylan ® The wood surface treated with SIVO 121 protective agent maintains complete breathability. Compared to most common resin systems in the paint and coating industry, the effect of Dynasylan ® SIVO 121 wood surface impregnation protectant on water vapor permeability is negligible.
Dynasylan® SIVO 121 The protective agent for wood surface impregnation treatment can be mixed with water in any proportion. Alcohols and ketones can be added to improve the dispersion of the product on the surface of wood. However, the compatibility of the product with commonly used additives in other hydrophilic systems, such as wetting agents, defoamers, and adhesives, needs to be investigated separately. We suggest paying special attention to the expiration date of the formulated products. Sometimes preservatives, fungicides, and Dynasylan need to be added to prevent the formation of microorganisms such as mold ® The compatibility of SIVO 121 wood surface impregnation protective agent needs to be carefully tested.
Usage information:The concentration of Dynasylan ® SIVO 121 wood surface impregnation protective agent should be at least 50% wt, otherwise complete protective effect cannot be achieved. Therefore, we do not recommend low concentration dosage. Although the durability of the product's performance needs to be determined through long-term outdoor weather resistance tests, the QUV test results of the German Industrial Standard (DIN EN ISO 11507) show that the product has good theoretical weather resistance.
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