Functional Monomers

Cyclohexyl Methacrylate (CHMA)

Cyclohexyl Methacrylate (CHMA), identified by CAS Number 101-43-9, is a high-performance monofunctional methacrylate monomer characterized by its bulky alicyclic side chain. As a versatile building block in polymer chemistry, CHMA serves as a critical intermediate for synthesizing acrylic resins that require a specific balance of rigidity and durability. The incorporation of the cyclohexyl moiety significantly enhances the glass transition temperature (Tg) of resulting copolymers without compromising optical clarity. This monomer is valued in the global specialty chemicals market for its low volatility and excellent weathering characteristics. Its unique molecular structure imparts superior scratch resistance and water repellency compared to standard linear methacrylates. CHMA is primarily utilized in high-solids coatings, adhesives, and optical materials where long-term stability and mechanical integrity are paramount. It acts as an essential reactive diluent in UV-curable systems, offering reduced shrinkage and improved adhesion to diverse substrates, making it indispensable for modern industrial formulations.

Attributes

Key Features and Benefits

High Glass Transition Temperature (Tg): Enhances the hardness and thermal stability of copolymer systems.
Outstanding Weatherability: Provides superior resistance to UV degradation and oxidative yellowing for outdoor applications.
Hydrophobic Properties: The bulky cyclohexyl group significantly reduces water absorption and improves moisture resistance.
Excellent Clarity: Maintains high optical transparency in clear coats and optical-grade resins.
Low Volatility: Ensures safer handling and reduced VOC emissions during processing.
High Purity: Typically supplied at 98%+ purity to ensure consistent polymerization kinetics and reliable end-product performance.
Scratch and Impact Resistance: Improves the mechanical durability of protective surface coatings.

Specifications

Technical Highlights

Physical State: Clear, colorless to light yellow liquid with a characteristic ester odor.
Molecular Weight: 168.23 g/mol.
Boiling Point: Approximately 210°C at atmospheric pressure.
Solubility: Miscible with most organic solvents including alcohols, ethers, and aliphatic/aromatic hydrocarbons; insoluble in water.
Specific Gravity: ~0.964 at 25°C.
Refractive Index: ~1.458.
Handling and Storage: Must be stored in a cool, well-ventilated area away from direct sunlight. Contains polymerization inhibitors like MEHQ to ensure shelf stability. Use stainless steel or HDPE containers for long-term storage to prevent contamination. Avoid contact with strong oxidizers and mineral acids.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Automotive Coatings: Used in clear coats and topcoats for enhanced gloss retention and stone-chip resistance.
Optical Materials: Essential for manufacturing high-quality optical lenses, light guides, and fiber optics due to its refractive index.
Dental Resins: Incorporated into restorative materials and adhesives for its low shrinkage and biocompatibility.
Adhesives and Sealants: Functions as a reactive monomer to improve bond strength and thermal resistance in industrial adhesives.
UV/EB Curable Inks: Utilized in printing applications for its excellent adhesion to plastics and low odor profile.
Plastic Modifiers: Employed as an additive to improve the heat resistance of PMMA and other thermoplastic polymers.