LK-RX 22D T245
High-Performance Methyl Hydrogen Silicone Fluid for Water Repellency & Anti-Caking Applications
Product Overview:
LK-RX 22D T245 is a highly reactive methyl hydrogen silicone fluid designed to provide outstanding water repellency and anti-caking performance. It offers effective surface protection and can be used independently or in conjunction with metal or base catalysts to accelerate the curing process.
This versatile fluid is suitable for a wide range of organic and inorganic substrates, such as gypsum boards, cement boards, textiles, and wood. It is particularly effective when applied as a spray treatment to powdered minerals like calcium carbonate and calcium oxide, helping to prevent clumping caused by moisture absorption.
LK-RX 22D T245 is easily dilutable in standard solvents, offers low volatility, and delivers excellent compatibility with diverse formulations. It also enhances flow and leveling properties, making it a valuable additive in construction materials, coating systems, and powder processing industries.
Key features:
- Superior water repellency.
- Easily miscible with common solvents.
- Broad material compatibility.
- Highly effective even at low dosages.
- Suitable for both surface treatment and additive use.
- Enables faster curing when used with catalysts.
Technical details:
Applications:
LK-RX 22D T245 is well-suited for industrial and construction-related applications such as:
- Hydrophobic treatment for plasterboards and gypsum blocks
- Surface treatment for powders and granules to enhance water repellency, flow ability, and prevent caking
Recommended Dosage:
Use at 1%–2% based on the solid content for gypsum and cement board formulations.
FAQs
What is LK-RX 22D T245?
LK-RX 22D T245 is a reactive methyl hydrogen silicone fluid used as an additive, intermediate, or overcoat to impart excellent water-repellent properties across various substrates.
What is the key application for the methyl hydrogen silicone fluid LK-RX 22D T245?
LK-RX 22D T245 is preliminary used for water-resistant applications such as –
- As a water repellent additive for gypsum boards (0.04%–0.1% based on solids).
- As a surface coating on hydrophilic powders (e.g., calcium carbonate) to prevent clumping due to moisture absorption.
- As a water-repellent treatment for textiles, wood, and particle boards. As an intermediate in formulations for coatings or admixtures.
How is methyl hydrogen silicone fluid product LK-RX 22D T245 useful in gypsum board water-repellent applications?
LK-RX 22D T245 enhances the water resistance of gypsum boards by acting as a hydrophobic additive. When added at 0.04%–0.1% of the solids weight, it significantly reduces moisture absorption, improving durability and performance without affecting board strength or processing. This product is added during the mixing of gypsum and water in the mixing tank.
Can the methyl hydrogen silicone fluid LK-RX 22D T245 be diluted?
LK-RX 22D T245 can be easily diluted using common solvents (Toluene, Xylene, MTO), allowing flexibility in formulation and ease of application across various substrates. However, for the admixture application, it is recommended to use it as is.
LK-RX 22D T245 is not soluble in water.
How can the water repellent methyl hydrogen silicone product LK-RX 22D T245 be applied in coating applications?
Water repellent LK-RX 22D T245 can be applied as a surface coating either directly or in diluted form. It can be sprayed or brushed onto the substrate and may be used alone or with suitable catalysts to accelerate curing.
What is the shelf life of methyl hydrogen silicone fluid LK-RX 22D T245, and what precautions should be taken during handling?
Water repellent LK-RX 22D T245 has a shelf life of 24 months when stored in its original, sealed container below 32°C and protected from direct sunlight.
During handling, standard safety precautions should be followed:
- Use gloves and safety goggles
- Store in a cool, well-ventilated area away from heat, sparks, or open flames
- Avoid contact with strong acids, bases, oxidizing agents, and heavy metals
- Do not store in unventilated containers, as the product may evolve hydrogen gas in the presence of catalysts and moisture
- Proper storage and handling ensure product stability and safe usage
Does the methyl hydrogen silicone fluid LK-RX 22D T245 require a catalyst for curing?
LK-RX 22D T245 is a reactive silicone fluid and does not always require an external catalyst. However, the curing process can be significantly accelerated with the addition of catalysts such as metal salts, bases, or acids, especially when faster cross-linking or enhanced performance is desired.
In some cases, the base materials themselves (with low or high pH) can act as catalysts, making the addition of external catalysts unnecessary.
What is the flash point (closed cup method) of LK-RX 22D T245?
The water-repellent LK-RX 22D T245 has a flash point of over 110°C, as determined by the closed cup method.
What is the active content of the methyl hydrogen silicone fluid LK-RX 22D T245?
The active content of LK-RX 22D T245 is approximately 95–100%, with the remaining portion comprising low-volatility components.
What is the hydrogen (H) content of the methyl hydrogen silicone fluid LK-RX 22D T245?
The water-repellent LK-RX 22D T245 has a hydrogen content ranging from 1.50% to 1.60%.