Trimethylolpropane (TMP)

Description

1. Product Overview
Trimethylolpropane (TMP) is a high-purity, trifunctional polyol widely recognized as a critical building block in the synthesis of high-performance alkyd resins, polyurethanes, synthetic lubricants, and radiation-curable coatings. Its primary industrial use lies in enhancing the durability, chemical resistance, and thermal stability of industrial coatings and adhesives. The key value proposition is its ability to significantly improve crosslinking density in polymer systems, directly translating to superior hardness and weather resistance. Strategically, TMP is indispensable for manufacturers transitioning toward high-solids, low-VOC (volatile organic compound) formulations, aligning with global regulatory trends.

2. Key Specifications & Technical Characteristics

• Chemical composition: 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol (C₆H₁₄O₃)

• Purity grade: ≥ 99.0% (Industrial Grade); ≥ 99.5% (High-Purity Grade for specialty applications)

• Physical characteristics:

  • White, crystalline solid (flake or granular form)

  • Hydroxyl value: 37.5 – 39.5% (as OH)

  • Melting point: 58 – 61°C

  • Density (at 20°C): ~1.084 g/cm³

  • Moisture content: ≤ 0.1%

• Packaging options: 25 kg multi-layer paper bags, 500 kg super sacks, and bulk flexitanks for liquid melt (120°C delivery)

• Shelf life: 24 months when stored in a cool, dry, well-ventilated area away from oxidizing agents

3. Core Industrial Applications

• Primary industries: Paints & coatings, adhesives, elastomers, synthetic lubricants, and UV-curable resins.

• Specific use cases:

  • Industrial coatings: Used in polyester resins for coil, can, and automotive topcoats – provides exceptional gloss retention and overbake resistance.

  • Polyurethane dispersions (PUDs): Acts as a chain extender/crosslinker, yielding flexible yet tough films for wood and leather finishes.

  • Synthetic lubricants: Forms TMP triesters (e.g., with oleic or stearic acid) for high-temperature, oxidation-stable hydraulic fluids.

  • Radiation-curable coatings: Enables fast cure speeds and low shrinkage in electronics and printing inks.

• Performance advantage over alternatives: Compared to neopentyl glycol (NPG) or pentaerythritol (PE), TMP offers superior balance between flexibility and crosslink density, reducing brittleness while maintaining chemical resistance.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified production with real-time SPC (statistical process control) ensuring ≤ 0.2% batch-to-batch purity variation.

• Supply reliability: Dual-sourced manufacturing (Asia-Pacific and Europe) with 30,000 MT annual capacity and 2,500 MT safety stock held in Rotterdam and Houston.

• Logistics capability: Available as solid flakes (ambient container) or molten liquid (ISO tank with heating coils) – door-to-door tracking with temperature monitoring.

• Price competitiveness: Long-term contracts with formaldehyde and acetaldehyde suppliers lock in raw material cost stability, offering fixed pricing for 6–12 month volumes.

• Sustainability: TMP from bio-based acetaldehyde pathway available upon request (ISCC Plus certified); zero hazardous waste process water recycling.

• Technical support: Free regulatory documentation (TDS, MSDS, REACH/EPA compliance), formulation advisory, and HPLC batch analysis upon delivery.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 20 MT (solid flakes, one full 20′ FCL)

• BULK loading capacity:

  • 20 MT per 20′ dry container (flake, 25 kg bags on pallets)

  • 24 MT per 20′ ISO tank container (molten liquid, heating jacket required)

• Lead time: 14 days ex-warehouse (regional hub) / 30–35 days FOB origin port