Overview
Hydroxypropyl Methacrylate (HPMA) is a methacrylic ester monomer with a hydroxypropyl group, making it highly reactive and versatile. It is commonly used in the production of polymers and copolymers due to its ability to improve adhesion, flexibility, and biocompatibility. HPMA is particularly valued in industries requiring durable coatings, medical-grade materials, and high-performance adhesives. Its unique properties stem from the combination of the methacrylate backbone and the hydroxypropyl side chain, which enhances solubility and cross-linking potential.
Physical and Chemical Properties
HPMA is a colorless to pale yellow liquid with a mild odor. It has a molecular weight of 144.17 g/mol and a density of 1.066 g/cm³. The compound is soluble in water and most organic solvents, including ethanol, acetone, and ethyl acetate. Its boiling point ranges between 87-90°C at reduced pressure (1 mmHg), and it exhibits high reactivity due to the presence of both a methacrylate group and a hydroxyl group. These functional groups enable HPMA to participate in polymerization reactions, forming homopolymers or copolymers with other monomers.
Main Applications
HPMA is widely used in the coatings industry to enhance the durability and adhesion of paints and varnishes. It is also a key component in dental materials, such as restorative resins and adhesives, due to its biocompatibility and ability to bond with tooth structures. In the medical field, HPMA is utilized in the production of contact lenses, drug delivery systems, and hydrogels. Its hydrophilic nature and low toxicity make it suitable for applications requiring prolonged contact with human tissues. Additionally, HPMA is employed in the manufacture of pressure-sensitive adhesives and sealants.
Safety and Storage
HPMA can cause skin and eye irritation upon contact, and prolonged exposure may lead to sensitization. Proper personal protective equipment (PPE), including gloves and goggles, should be worn when handling this chemical. Adequate ventilation is essential to minimize inhalation risks. The compound should be stored in a cool, dry place away from direct sunlight and heat sources. Containers must be tightly sealed to prevent moisture absorption and contamination. HPMA is stable under recommended storage conditions but may polymerize if exposed to heat or initiators.
B2B Procurement Guide
When procuring HPMA, buyers should prioritize suppliers with a proven track record of delivering high-purity products. Key specifications to verify include CAS number (27813-02-1), molecular weight, and solubility characteristics. Bulk purchases typically offer cost advantages, but storage capacity and shelf life must be considered. Requesting certificates of analysis (CoA) and material safety data sheets (MSDS) ensures compliance with regulatory standards. For specialized applications, such as medical or dental uses, additional purity certifications may be required.
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