Sinomer® SA is a monomer with low shrinkage and volatility, flexibility, excellent weather resistance and water resistance. It can be widely used in inks, release coatings, coatings and textile coatings.
SINOMER® SA
Long-Chain Hydrophobic Monomer for Low-Shrinkage and Weather-Resistant Systems
Chemical Name: Stearyl Acrylate;Octadecyl acrylate
CAS No.: 4813-57-4
MF: C21H40O2 MW： 324.54
Molecular structure：
SINOMER® SA (Stearyl Acrylate) is a long-chain hydrophobic monomer featuring a C18 alkyl group and a polymerizable acrylate double bond. It offers extremely low shrinkage, low volatility, and excellent flexibility in cured films. The long alkyl side chain imparts outstanding weather resistance, water resistance, and hydrophobicity, making it an ideal building block for specialty polymer syntheses where hydrophobic modification is required.
| Item | Specification |
| Appearance | White solid to liquid |
| Assay | ≥96% |
| Melting Point | 20~30°C |
| Acid Value | ≤0.5 mg KOH/g |
| Inhibitor (MEHQ), ppm | ≤500 |
Low curing shrinkage and low volatility
Excellent flexibility and toughness
Outstanding weather resistance and water resistance
Long C18 hydrophobic chain for effective hydrophobicity
Good compatibility with various monomers and resins
Amphiphilic Polymer Hydrophobic Monomer:
Used in the synthesis of amphiphilic polymers, polymeric emulsifiers, polymeric stabilizers, and self-emulsifying leather waterproofing agents. It can copolymerize with hydrophilic monomers (e.g., acrylic acid, maleic acid, acrylamide) to generate amphiphilic polymers.
Hydrophobic Monomer for Polymer Waterproofing Materials:
Applied in the synthesis of fabric “three-proof” (waterproof, oil-proof, stain-resistant) finishing agents and fluorine-free waterproofing agents.
Hydrophobic Monomer for Hydrophobically Associating Thickeners:
A small amount of stearyl acrylate is added to hydrophilic monomers (e.g., acrylamide) during copolymerization. In aqueous polymer solutions, the stearyl side chains associate reversibly, forming hydrophobic crosslinking points.
Monomer for Crude Oil Pour Point Depressants:
Acts as a primary monomer to polymerize and produce polymeric pour point depressants for crude oil.
Functional Monomer for Other Polymer Syntheses:
Suitable for diverse polymer applications requiring hydrophobic modification.
High Glass Transition Temperature (Tg) in Homopolymers:
While stearyl acrylate homopolymers exhibit a high Tg, practical applications often involve low-molecular-weight polymers with reduced melting points.
● 10kg,100kg,150kgs/drum.
Being kept in dry, clean warehouse with well ventilation.
Avoid exposing to light and heating.
Protecting the product from leakage, rain and insolation during transportation.
We offer a variety of options to help you find the right product for your application
Provide formulation optimization support for water-based/solvent-based systems
Full coverage of REACH, FDA, and GB standards
99.8% on-time delivery rate, 10,000-ton production capacity guarantee
