Methacryloyloxysilane

Methacryloyloxysilane is a compound with a specific chemical structure and properties. The following is a detailed answer to it:

1. Chemical structure

• name: Methacryloyloxysilane

• Typical components: Gamma methacryloyloxypropyltrimethoxysilane

• functional groupContains a methacryloyloxy functional group with an unsaturated double bond structure and three hydrolyzable alkoxy groups (such as trimethoxy).

2. Physical properties

• appearanceUsually colorless or light colored liquid.

• SolubilityEasy to hydrolyze, soluble in organic solvents such as isopropanol, acetone, toluene, xylene, mineral oil, etc.

3. Chemical properties

• Reactive activity：

• Acryloxy has high reactivity and can react with other functional groups.

• Can undergo bidirectional chemical reactions with inorganic materials (such as glass, metal, fillers) and organic polymers (such as thermosetting resins, plastics, elastomers) to improve the bonding, adhesion, and compatibility between the two.

• Improve performance：

• Improve the compatibility between inorganic fillers and polymers, and enhance dispersibility.

• Improve the mechanical properties of composite materials, such as fiberglass reinforced composite materials.

• Improve the dry and wet mechanical properties of polyester based composites filled with fillers such as white carbon black, glass, silicates, and metal oxides.

• Improve the wet electrical properties of many inorganic mineral filled composite materials such as cross-linked ethylene and polyvinyl chloride.

4. Application Fields

• Fiberglass processingConfigure as a fiberglass infiltration solution to treat fiberglass and improve its compatibility with polymers.

• Artificial stone industryImprove the compatibility between various fillers and matrix resins, and enhance the mechanical properties of stone.

• Coatings, adhesives, and sealantsCo polymerize with vinyl acetate and acrylic or methacrylate monomers to produce wet curable silylated polymers, providing excellent adhesion and weather resistance.

• Surface modificationAs a surface modifier of nano powder and inorganic filler, it can improve its compatibility and adhesion with organic molecules.

5. Instructions for use

• Add quantityWhen used as an additive, the amount of silane added is generally 0.5-3.0% of the formula amount, and the most suitable amount needs to be determined through experiments.

• Preparation of aqueous solutionIt can be configured as an aqueous solution with a concentration of 0.1-1.0%. It is recommended to use organic acids such as acetic acid to adjust the pH of pure water to between 3.0-4.5, and then add silane to acidified water while stirring. Continue stirring until the hydrolysis reaction is complete, forming a clear, transparent and homogeneous solution.

• Precautions for use：

• The configured silane aqueous solution is unstable and will gradually form oligomers of silane. It is recommended to use it within 24 hours.

• If turbidity and precipitation occur during storage, it will affect the performance of silane aqueous solution and cannot be used.

• After the surface of the filler is treated with silane, it can be naturally air dried or dried for a short period of time at a temperature of 105 to 120 ℃ to complete the condensation of silanol groups on the surface, removing methanol and water.

6. Synthesis

The synthesis process of methacryloyloxysilane usually involves adding methacrylic anhydride and triethoxysilane into a reaction vessel, adding a catalyst, and then reacting with oxygen to generate a hydroxyl group. This process is an oxidation reaction, where oxygen in the reactants reacts with silane compounds to form hydroxyl substituents.

summary

Methacryloyloxysilane is a compound with a specific chemical structure and properties, widely used in fields such as glass fiber processing, artificial stone industry, coatings, adhesives, and sealants. It plays a role in improving the compatibility between inorganic fillers and polymers, enhancing the mechanical properties of composite materials, and other ways.