Overview
Dimethylolurea (DMU) is an organic compound derived from urea and formaldehyde, primarily used as a crosslinking agent in industrial applications. It is valued for its ability to form durable bonds in resins and textiles without releasing free formaldehyde, making it a safer alternative in manufacturing. First synthesized in the early 20th century, DMU gained prominence in the textile industry for wrinkle-resistant fabric finishes. Its water solubility and reactivity with cellulose fibers make it a versatile intermediate in coatings and adhesives, aligning with modern eco-friendly production standards.
Physical and Chemical Properties
DMU appears as a white crystalline powder with a melting point of 120-122°C, though it tends to decompose at higher temperatures rather than boil. It is highly soluble in water, facilitating its use in aqueous formulations for textiles and adhesives. The compound’s key chemical property is its dual hydroxymethyl groups (–CH2OH), which enable crosslinking reactions with polymers or fibers. Unlike traditional urea-formaldehyde resins, DMU minimizes formaldehyde emissions during curing, meeting stricter environmental regulations.
Main Applications
In textiles, DMU serves as a durable press agent, imparting crease resistance to cotton and blends. It reacts with cellulose fibers under heat, forming covalent bonds that enhance fabric stability. DMU is also a critical component in urea-formaldehyde resins for plywood and particleboard, where it improves adhesive strength. Additionally, it acts as a modifier in paper coatings to increase wet-rub resistance. Emerging uses include slow-release fertilizers, leveraging its nitrogen content and biodegradability.
Safety and Storage
While DMU is less hazardous than formaldehyde-based alternatives, precautions are necessary. Use gloves and goggles to prevent skin/eye irritation, and ensure adequate ventilation to avoid dust inhalation. Store DMU in sealed containers under dry conditions, as moisture can degrade its quality. Incompatible with strong oxidizers; keep away from heat sources to prevent decomposition. Spills should be contained and cleaned with water, following local disposal guidelines.
B2B Procurement Guide
Industrial buyers should prioritize suppliers offering DMU with ≥98% purity and low moisture content, as impurities can affect reactivity. Bulk pricing typically ranges between $2.5-$4.5 per kg, with discounts for long-term contracts. Request Certificates of Analysis (CoA) for batch consistency and test solubility in intended applications. Opt for manufacturers compliant with REACH or similar regulations to ensure product safety and traceability. Consider regional logistics to minimize storage time and preserve shelf life.
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