Trimethylolpropane (TMP), identified by CAS number 77-99-6, is a vital tri-functional polyol (triol) widely utilized as a chemical intermediate in the polymer and specialty chemicals industries. Structurally, it consists of a six-carbon framework with three primary hydroxyl groups, represented by the formula $C_6H_{14}O_3$. TMP is synthesized through the aldol condensation of n-butyraldehyde with formaldehyde, followed by a Cannizzaro reaction. At room temperature, it appears as white, hygroscopic flakes or crystals.
The significance of TMP lies in its neopentyl structure, which lacks beta-hydrogens. This configuration provides exceptional thermal, oxidative, and hydrolytic stability compared to other polyols like glycerol. As a “building block” molecule, it is primarily used to produce alkyd and polyester resins, synthetic lubricants, and polyurethane foams. Its ability to provide a branched molecular structure allows manufacturers to engineer materials with high cross-linking density, resulting in enhanced durability, chemical resistance, and mechanical strength in high-performance coatings and industrial materials.
* Enables superior crosslinking for enhanced polymer network formation.
* Provides consistent reactivity due to its primary hydroxyl groups.
* Ensures high product quality with low color and purity.
* Offers excellent thermal stability for demanding applications.
* Features low volatility, promoting safer handling and reduced emissions.
* Boasts broad miscibility, aiding diverse formulation development.
* Contributes to environmental responsibility as a readily biodegradable compound.
* Acts as a versatile building block for high-performance resins and lubricants.
* Appearance: White Flakes
* Assay (TMP content): Min. 99.0%
* Melting Point: Min. 58 °C
* Water Content: Max. 0.2%
* Hydroxyl Content: Min. 42.0%
* Colour (APHA/Hazen): Max. 10
* Ash Content: Max. 0.01%
* Acid Value: Max. 0.05 mg KOH/g
* Flash Point (Pensky-Martens closed cup): Min. 165 °C
* Specific Gravity (at 20°C): 1.05-1.07 g/cm³
* **Polyurethane Production:** Functions as a trifunctional building block, chain extender, or crosslinking agent, enhancing hardness, abrasion, and chemical resistance in polyurethanes.
* **Alkyd Resins for Coatings:** Serves as a crucial component in producing alkyd resins, which improves the durability, flexibility, and gloss retention of paints and varnishes.
* **Polyester Resins:** Incorporated into unsaturated and saturated polyester resins to boost mechanical strength and weatherability for composites, coatings, and adhesives.
* **Radiation-Curable Coatings:** Utilized in acrylic esters for UV-curable coatings, inks, and adhesives, providing rapid cure, high hardness, and chemical resistance.
* **High-Performance Lubricants:** Acts as a raw material for synthesizing TMP esters, imparting excellent thermal stability and hydrolytic resistance to synthetic lubricants and functional fluids.
* **Adhesives and Sealants:** Enhances adhesion, flexibility, and overall performance in various adhesive and sealant formulations.
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