Overview
Trimethylolpropane (TMP) is a trihydric alcohol derived from formaldehyde and butyraldehyde, featuring three hydroxyl groups that enhance its reactivity in polymerization. It is a key intermediate in producing alkyd resins, polyurethanes, and ester-based lubricants. Industrially, TMP is valued for its ability to improve product durability and thermal resistance. Its low volatility and high boiling point make it suitable for high-temperature applications, such as automotive coatings and industrial adhesives.
Physical and Chemical Properties
TMP appears as a white, odorless crystalline solid with a melting point of 58-60°C and a density of 1.18 g/cm³. It is hygroscopic and readily dissolves in polar solvents like water and ethanol. Chemically, TMP exhibits high stability under heat and UV exposure, making it ideal for coatings. Its hydroxyl groups enable cross-linking reactions with isocyanates or acids, forming polymers with enhanced mechanical properties.
Main Applications
TMP is a cornerstone in the coatings industry, where it modifies alkyd resins to improve hardness and weather resistance. It also serves as a polyol in polyurethane foams for furniture and insulation. In lubricants, TMP esters reduce volatility and extend equipment life. Additionally, it acts as a plasticizer in PVC and a curing agent in adhesives, offering flexibility and bond strength.
Safety and Storage
TMP is generally low-toxicity but may irritate eyes and skin upon direct contact. Use gloves and goggles during handling. Store in sealed containers away from moisture to prevent caking. Avoid exposure to strong oxidizers, which may cause combustion. Spills should be contained with inert absorbents and disposed of following local regulations.
B2B Procurement Guide
When sourcing TMP, prioritize suppliers with ISO 9001 certification to ensure consistent quality. Specify parameters like purity (≥99%), acid value (<0.1 mg KOH/g), and moisture content (<0.2%). Bulk purchases (ton-scale) typically reduce costs by 10-15%. Opt for drum packaging for long-term storage. Request SDS and technical datasheets for compliance checks.
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