Trimethylolpropane
Basic Information
Name: Trimethylolpropane
Other names: 2-ethyl-2-(hydroxymethyl)-1,3-propanediol; TMP
Molecular formula: C6H14O3
Molecular weight: 134.17
CAS number: 77-99-6
2.Physical and Chemical Properties
- Appearance: White crystalline solid (flake, granular or powder)
- Melting point: Approximately 58.8 °C
- Boiling point: Approximately 289 °C (760 mmHg, decomposes)
- Density: Approximately 1.084 g/cm³ (70 °C, liquid)
- Flash point: Approximately 172 °C (open cup)
- Solubility: Highly soluble in water (about 40 g/100 mL), ethanol and acetone; slightly soluble in benzene and ether
- Stability: Stable; hygroscopic
3.Main Functions and Applications (What are its uses?)
- Alkyd resin (core application): Trifunctional polyol for alkyd resin coatings, markedly improving film hardness, fast drying, weatherability and gloss retention.
- Polyurethane (core application): Crosslinker and polyol for PU coatings, elastomers, foams and adhesives, imparting excellent abrasion resistance, chemical resistance and flexibility.
- Acrylate monomers (core application): Feedstock for trimethylolpropane triacrylate (TMPTA) and trimethylolpropane trimethacrylate (TMPTMA), high-efficiency crosslinking monomers for UV/EB curing systems.
- Synthetic lubricants (core application): Esterification with fatty acids yields TMP esters used as premium synthetic lubricants, aviation lubricants and refrigeration oils.
- Polyester resin and plasticizer: Raw material for polyester resins and plasticizers.
- Surfactants and emulsifiers: Raw material for surfactants and emulsifiers.
4.A Benchmark-Level Industrial Masterpiece - A Meticulously Crafted "Coating-Grade" Cornerstone Polyol!
Purity ≥ 99.0%, high hydroxyl functionality. Low moisture, color and acid value.
Three primary hydroxyl groups for high crosslink density.
"What you see is what you get" - every lot ships with a complete certificate of analysis.
Chromatography Analysis - Trimethylolpropane
Signal: FID1 A (sample silylated with BSTFA/TMCS before injection; DB-5 column, 30 m × 0.25 mm × 0.25 μm; inlet 300 °C)
|
Retention Time (min) |
Type |
Peak Width (min) |
Peak Area |
Peak Height |
Area% |
|
4.816 |
BB |
0.102 |
4.5 |
0.6 |
0.03 |
|
6.528 |
BB |
0.128 |
9.0 |
1.1 |
0.06 |
|
8.204 |
BB |
0.144 |
18.0 |
2.0 |
0.12 |
|
10.418 |
BB |
0.158 |
14850.0 |
1802.4 |
99.00 |
|
13.806 |
BB |
0.168 |
63.0 |
6.8 |
0.42 |
|
16.214 |
BB |
0.182 |
27.0 |
2.9 |
0.18 |
|
18.602 |
BB |
0.196 |
16.5 |
1.8 |
0.11 |
|
20.418 |
BB |
0.210 |
12.0 |
1.3 |
0.08 |
- Determination method: Karl Fischer titration (standard: ≤ 0.10%) Moisture content 0.045%
- Test method: Ash content by ignition method (specification limit: ≤ 0.01%)
- Ash content 0.004%
- Test method: Capillary melting point method (quality standard: ≥ 57 °C) Melting point 59.6 °C
Product Specification - Trimethylolpropane
|
Item |
Specification |
|
Product model |
Trimethylolpropane (TMP) |
|
Appearance |
White crystalline solid (flake / granular) |
|
Purity (GC, %) |
≥ 99.0 |
|
Melting point (°C) |
≥ 57 |
|
Water content (%, K.F.) |
≤ 0.10 |
|
Color (Pt-Co, 50% methanol solution) |
≤ 20 |
|
Hydroxyl value (mg KOH/g) |
1235 – 1250 |
|
Acid value (mg KOH/g) |
≤ 0.05 |
|
Ash content (%) |
≤ 0.01 |
|
Packaging |
25 kg woven bag / 500 kg jumbo bag |
Test methods reference: purity by GC after silylation (GB/T 9722); water by Karl Fischer titration (GB/T 6283); color by Pt-Co / Hazen (GB/T 3143); hydroxyl value by acetylation-alkali titration; acid value by alkali titration; ash by ignition method (GB/T 7531).
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