Methacryloxypropyltrimethoxysilane

Catalog NumberHG2530850

CAS Number2530-85-0

CategorySilane Coupling Agent

Molecular Weight

248.35

Molecular Formula

C10H20O5Si

Boiling Point

255 °C

Purity

>98%

Appearance

Colorless liquid

Application

Used as an adhesion promoter at organic/inorgainc interfaces, as a surface modifier (e.g. imparting water repellency, organophilic surface adjustment) or as a crosslinker of polymers.

Shelf Life

The shelf life, when the container is stored unopened and under proper conditions above 50 ºF, is expected to be a minimum of two (2) years.

Functional Group

Methacryloxy

Refractive Index

1.429

Specific Gravity

1.045

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Case Study

Methacryloxypropyltrimethoxysilane for Tuning Silica Surface Hydrophobicity and Moisture Uptake

Jiang, Jun, et al. Applied Surface Science 397 (2017): 104-111.

This study investigated the application of γ-methacryloxypropyltrimethoxysilane (MPTS) as a coupling agent to systematically alter the surface properties of silica, focusing on the relationship between silane concentration and the resulting hydrophobicity and moisture uptake.
Modification Process: Silica powders were modified by a standard hydrolytic grafting protocol: Disperse 1 g silica per 100 mL ethanol-water (9:1 v/v). Add MPTS at levels of 2, 4, 6, 8 and 10% (w/w relative to silica) and hydrolyze (pH 3-4 with acetic acid). Heat/stir at 60-70 °C, 500 rpm for 30 min, filter and dry at ~103 °C. Post-treatment included a 24 h water immersion and repeated washing to remove physisorbed species, followed by final drying to constant weight.
Key Results:
· Hydrophobicity increases with MPTS loading. WCA measurements on modified silica films rose progressively with MPTS concentration; films treated at 6% and 8% MPTS exceeded 90° WCA, marking a transition to effectively hydrophobic surfaces.
· Reduced Moisture Uptake: The EMC of the modified silica decreased as the MPTS concentration increased, indicating improved resistance to ambient moisture.
· Optimal Dispersion and Self-Condensation: Silica modified with 8% MPTS demonstrated the least particle aggregation. The study identified that self-condensation reactions of MPTS molecules began to occur at concentrations above 4%, becoming more pronounced at the 8% concentration level. This self-condensation slightly influenced the EMC profile at low relative humidity but contributed to the lowest EMC at higher humidity levels (40-90% RH) due to the combined effect of high hydrophobicity and lower specific surface area.

Methacryloxypropyltrimethoxysilane in UV-Cured ORMOSIL Coatings for Corrosion Protection of Steel

Scotland, Kevin M., et al. Journal of Coatings Technology and Research 17.4 (2020): 977-989.

This study examined the development of a fast, UV-curable protective coating utilizing 3-methacryloxypropyltrimethoxysilane (MaPTMS) as a key organic-inorganic coupling agent to create a crosslinkable network that bonds effectively to steel and impedes corrosion.
Application & Process: MaPTMS was used as a primary precursor (paired with tetraethoxysilane (TEOS) in 1:1 molar ratio) to prepare an ORMOSIL sol. The final optimized protocol utilized isopropanol as a co-solvent and 1M nitric acid (HNO3) as catalyst to result in extremely rapid hydrolysis of the silanes. The prepared sol (which also contained a photoinitiator) was then deposited onto low-carbon steel coupons by dip-coating. After deposition, the coating was then crosslinked via exposure to UV light for 5 minutes and a thermal post-cure.
Key Performance:
· The optimized formulation achieved complete hydrolysis of the silane precursors within 35 seconds. Extensive condensation to form a networked silicate structure was confirmed after a short 20-minute reaction period, a significant acceleration compared to conventional sol-gel processes.
· The methacryloxy functional groups provided by MaPTMS enabled rapid photopolymerization, achieving up to 70% consumption of the acrylate functionality within the 5-minute UV exposure window.
· The cured hybrid coating exhibited strong adhesion to the steel substrate. In accelerated corrosion testing using a dilute Harrison's solution, the coating significantly impeded substrate corrosion, extending protection for a period between 17 to 25 hours.

• Molecular Weight: 248.35
• Molecular Formula: C10H20O5Si
• Boiling Point: 255 °C
• Purity: >98%
• Appearance: Colorless liquid
• Application: Used as an adhesion promoter at organic/inorgainc interfaces, as a surface modifier (e.g. imparting water repellency, organophilic surface adjustment) or as a crosslinker of polymers.
• Shelf Life: The shelf life, when the container is stored unopened and under proper conditions above 50 ºF, is expected to be a minimum of two (2) years.
• Functional Group: Methacryloxy
• Refractive Index: 1.429
• Specific Gravity: 1.045