Trimethylolpropane CAS NO.77-99-6
Product Introduction
Trimethylolpropane (TMP CAS NO.77-99-6 ) – High-purity polyol for high-performance coatings and alkyd resins.
Excellent hydroxyl functionality, low acid value, and outstanding thermal stability. Improves hardness, weather resistance, and color retention. Stable supply from China. COA available. Ideal for synthetic lubricants, PU coatings, and radiation-curing monomers.
Trimethylolpropane (CAS NO.77-99-6)Product Overview
Product Description
Trimethylolpropane (TMP, 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol, CAS 77–99–6) is a non-toxic, trifunctional primary polyol with three reactive hydroxyl groups. It appears as a white crystalline solid at room temperature (melting point ≈ 58–61 °C) and is widely used as a building block in the synthesis of alkyd resins, polyurethane (PU) dispersions, high-solid coatings, synthetic lubricants (trimethylolpropane esters), and radiation-curable monomers. Its trifunctional structure provides excellent crosslinking density, leading to final products with superior hardness, chemical resistance, and weatherability.
Product attributes
|
Product Name |
Trimethylolpropane |
|
Also Known As |
TMP / 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol |
|
CAS No. |
77-99-6 |
|
Molecular Formula |
C₆H₁₄O₃ |
|
Molecular Weight |
134.17 g/mol |
|
Purity |
≥99% / ≥98.5% |
|
Water Content |
≤0.05% (premium) |
|
Acid Value (as HCOOH) |
≤0.002% |
|
Melting Point |
56-60°C |
|
Flash Point |
~172°C |
|
Appearance |
White crystalline flakes |
|
White crystalline flakes |
Alkyd resin, Polyurethane, Unsaturated polyester, Synthetic lubricant, Plasticizer, PVC heat stabilizer |
|
Packing |
25kg/bag, 500kg/1000kg jumbo bag |
Advantages – Why choose our TMP
Higher functionality than(diols):
Three primary OH groups provide efficient branching and crosslinking at lower loading.
Better weatherability than pentaerythritol in alkyds:
TMP-based alkyd resins show improved gloss retention and flexibility without sacrificing hardness.
Low volatility and good thermal stability:
Suitable for high-temperature curing systems (e.g., coil coatings, powder coatings).
Custom physical form:
Available as flake or powder for easy handling and weighing.
Benefits – What the customer gains
For coating manufacturers (industrial, automotive, wood):
TMP improves hardness, stain resistance, and outdoor durability of polyester and PU coatings → longer product life and reduced repainting frequency.
01
For alkyd resin producers
TMP delivers high molecular weight resins with lower viscosity, allowing high-solids formulations that comply with VOC regulations → easier application and regulatory compliance.
02
For synthetic lubricant formulators (ISO VG 46, 68 etc.):
TMP esters offer high viscosity index (VI > 140) and low pour point → better energy efficiency and extended oil drain intervals.
03
For UV-curable monomer makers:
TMP triacrylate (TMPTA) provides fast cure response and excellent adhesion to plastics/metals → higher throughput and stronger bond strength.
04
Evidence
- COA (Certificate of Analysis) provided with each batch, including GC chromatogram and hydroxyl value test report.
- 24-month stability study under dry, cool storage (below 35 °C) shows purity loss < 0.2 % and no significant acid value drift.
- Customer case: A Turkish coating producer replaced pentaerythritol with our TMP in their coil coating formulation and improved reverse impact resistance from 40 to 60 in-lb without losing pencil hardness (2H).
- Logistics proof: We export an average of 500 tons of TMP monthly to clients in Europe, Southeast Asia, and the Middle East, with < 0.3 % quality-related complaints over 24 months.
Application Examples
Alkyd Resin:
Improves hardness, gloss, and weather resistance
01
Polyurethane:
Crosslinking agent for PU foams, elastomers, and coatings
02
Synthetic Lubricants:
Base stock for high-performance industrial lubricants
03
Unsaturated Polyester Resin:
Enhances mechanical properties
04
Plasticizers & PVC Stabilizers:
Intermediate for high-performance additives
05
Call to Action
Looking for a reliable Trimethylolpropane (TMP, CAS 77-99-6) supplier for pharmaceutical, industrial, or specialty chemical applications? Contact Shandong Xima Supply Chain Management Co., Ltd. today to receive customized specifications, competitive pricing,free COA sample, and dependable global supply solutions.
FAQ
Q1: What is the purity of your TMP?
A1: Our Trimethylolpropane is over 99% pure, verified through rigorous laboratory testing.
Q2: Can TMP be used in polyurethane foam production?
A2: Yes, its tri-functional structure makes it ideal for polyurethane foams, elastomers, and coatings.
Q3: How is TMP packaged and stored?
A3: Available in drums and bulk containers; store in a cool, dry place, away from direct sunlight and moisture.
Q4: Is TMP suitable for high-performance resin production?
A4: Absolutely. Its high reactivity and hydroxyl content ensure superior crosslinking and mechanical properties in resins.
Q5: What is the MOQ for a trial order?
A: 5 tons (one pallet of 20 kg × 250 bags) for flake form. Smaller quantities (1 ton) may be possible for sample evaluation; shipping cost will be higher. Contact us to discuss.
Q6: What export documents do you provide for TMP?
A: Commercial invoice, packing list, Bill of Lading, COA, Material Safety Data Sheet (MSDS), and if requested, Certificate of Origin (C/O) or GHS compliant labels.
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