Tri-Pentearythritol(Micronized)
| HS Code | 171210 |
| Chemical Name | Tri - Pentaerythritol (Micronized) |
| Appearance | Typically a fine powder due to micronization |
| Molecular Formula | C15H34O10 (approximate for Tri - Pentaerythritol) |
| Molecular Weight | Approximately 386.43 g/mol (approximate for Tri - Pentaerythritol) |
| Melting Point | Relatively high, can vary based on purity and micronization, around 230 - 260°C |
| Solubility | Poorly soluble in water, soluble in some polar organic solvents |
| Density | Typically around 1.3 - 1.4 g/cm³ |
| Particle Size | Micron - sized, usually in the range of 1 - 100 μm due to micronization |
| Thermal Stability | Good thermal stability up to a certain temperature, decomposes at higher temperatures |
| Hygroscopicity | May have some hygroscopicity, can absorb moisture from the air |
As an accredited Tri-Pentearythritol(Micronized) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | To package Tri-Pentearythritol (Micronized), industrial grade uses plastic woven bags with inner film and double seams; pharmaceutical grade uses aluminum foil bags with vacuum packaging, and the outer box is cushioned, all marked with "micronized powder". |
| Storage | Store Tri-Pentearythritol (Micronized) in a dry warehouse, place on wooden pallets, ventilate away from the wall, and stack no more than four layers to prevent moisture absorption and caking. |
| Shipping | Transport Tri-Pentearythritol (Micronized) in a boxcar, cover with oilcloth to avoid rain, load and unload lightly, and replace the bag if it is broken. |
Competitive Tri-Pentearythritol(Micronized) prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
In ancient times, sugar derivatives were mostly used in maltose and candied fruits. In modern times, chemical industry has been developed, and polyols are needed as raw materials. Craftsmen extracted polyols from sucrose fermentation broth, and later developed chemical synthesis methods. At first, erythritol was coarse crystals. After the ultra-fine grinding process was improved, Tri-Pentearythritol (Micronized) was born to meet the needs and is now widely used in coatings and resin manufacturing.
Product Overview
Tri-Pentearythritol (Micronized) is a white ultrafine powder, odorless, slightly sweet, easily soluble in water, insoluble in organic solvents, with a polyhydroxy structure, high reactivity, can be used as a crosslinking agent, flame retardant additive, and is mostly used in powder coatings, polyurethane resins, and pharmaceutical intermediates. The micronized form makes it more evenly dispersed and more fully reacted.
Physical & Chemical Properties
Tri-Pentearythritol (Micronized) has a density of 1.3g/cm³, a melting point of 240-250℃, a particle size of 1-5μm, is easily decomposed by heat, has stable chemical properties at room temperature, is non-flammable, is hygroscopic, feels slippery, and its solubility in water increases with increasing temperature.
Technical Specifications & Labeling
Tri-Pentearythritol (Micronized) is a product with a purity of ≥98%, a moisture content of ≤0.3%, a hydroxyl value of ≥450mgKOH/g, and a particle size of D50≤3μm. The full name of Tri-Pentearythritol (Micronized) must be written on the label, and a purity test report and a particle size distribution table are attached.
Preparation Method
Tri-Pentearythritol (Micronized) is prepared by using acetaldehyde and formaldehyde as raw materials, and condensing them under alkaline conditions. The crude product is obtained by neutralization, crystallization, and centrifugal separation, and then purified by dissolution and recrystallization. Finally, ultrafine grinding is performed to obtain Tri-Pentearythritol (Micronized). The reaction temperature and grinding parameters are controlled to ensure the quality.
Chemical Reactions & Modifications
Tri-Pentearythritol (Micronized) contains multiple hydroxyl groups, can react with acids to undergo esterification, and react with isocyanates to form polyurethane. It can be compounded with flame retardants at high temperatures to enhance the stability of the expanded carbon layer. It does not react with metals or plastics at room temperature and is stable in storage.
Synonyms & Product Names
Tri-Pentearythritol (Micronized) is also known as "Tripentaerythritol (Micronized)", but in trade and technical documents, the full name Tri-Pentearythritol (Micronized) must be written to clarify its micronized characteristics and chemical structure.
Safety & Operational Standards
When operating Tri-Pentearythritol (Micronized), you must wear a dust mask and gloves, work in a ventilated area to avoid inhalation of dust, wash your hands after work, and prohibit open flames and strong oxidants in the storage area. Waste materials must be handled in accordance with regulations.
Application Area
Tri-Pentearythritol (Micronized) is mostly used as a crosslinking agent in powder coatings to improve the hardness and weather resistance of coatings; as a chain extender in polyurethane foam to enhance mechanical properties; it is also used as a carbon source in flame retardant systems to promote the formation of expanded carbon layers. It is widely used in coatings, plastics, and medicine.
Research & Development
Craftsmen are researching the surface modification technology of Tri-Pentearythritol (Micronized) to improve its dispersibility in organic solvents. At the same time, they are exploring the combination with nanomaterials to develop high-performance composite materials and expand its application in aerospace coatings and high-end adhesives.
Toxicity Research
Tri-Pentearythritol (Micronized) has low toxicity, with an oral LD50 of ＞10000mg/kg in rats. It is non-teratogenic and non-carcinogenic, non-irritating to the skin. Long-term exposure to dust may cause mild respiratory discomfort. It is safe and harmless under standardized operation.
Future Prospects
As the demand for high-performance raw materials in the coatings and resin industries grows, the demand for Tri-Pentearythritol (Micronized) will increase by 8% annually. Its production process will develop towards green and continuous production, and may play an important role in the fields of environmentally friendly coatings and bio-based materials, becoming a multifunctional fine chemical raw material.
Where to Buy Tri-Pentearythritol(Micronized) in China?
As a trusted Tri-Pentearythritol(Micronized) manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Tri-Pentearythritol(Micronized) supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
What is the key to the ultrafine process when preparing Tri-Pentearythritol (Micronized)?
This product is made from industrial-grade tripentaerythritol as raw material. It is first purified by melt crystallization (melting point 240℃, heat preservation for 2 hours) to remove single-season and double-season impurities to obtain crystals with a purity of 99.5%. Then it is ultrafinely treated by a jet mill, with a nitrogen pressure of 0.8MPa, a classification wheel speed of 3500 rpm, and a feed rate of 30kg/h. It is ground into powder like jade, so that the particle size D50=3μm, D90＜8μm, and Tri-Pentearythritol (Micronized) is obtained. During the crushing, the jacket is passed with cooling water, and the temperature is controlled at ＜60℃ to prevent heat agglomeration. The loose density of the powder is 0.35g/cm³, and the specific surface area is 15m²/g, which is 8 times larger than that of ordinary products. Its hydroxyl content is 38%±0.5%, and its moisture content is less than 0.1%. The particle size distribution span is less than 1.2 as detected by a laser particle size analyzer. It is a high-quality carbon source for intumescent flame retardant systems. This process is like a fine jade carving, which requires no error to obtain a product with uniform particles and good dispersion. When combined with ammonium polyphosphate, it can be decomposed synchronously to form a dense carbon layer.
What is the synergistic effect of Tri-Pentearythritol (Micronized) in intumescent flame retardant systems?
This product is compounded with Ammonium Polyphosphate (APP-3) in a ratio of 1:3, and the total addition amount is 30% for polypropylene. The flame retardancy reaches UL94 V-0 level (1.6mm), and the oxygen index increases from 18% to 32%, which is 5 percentage points higher than that of non-micronized tripentaerythritol. When burning, its hydroxyl group reacts quickly with the phosphoric acid group of APP to generate polyphosphate, catalyzing the carbonization of the substrate and forming an expanded carbon layer within 30 seconds. The thickness is 25 times that of the original product, and the thermal conductivity is 0.025W/(m・K). In ethylene-vinyl acetate copolymer (EVA), it is compounded with melamine (2:1:1), and the carbon layer structure is tougher. It does not fall off after being scour by flame for 10 minutes, and the flame retardant time is extended by 40% compared with single APP. Its ultra-fine particles can be evenly embedded in the gaps between resin molecules, and there are no holes in the carbon layer during combustion. Therefore, in flame-retardant products such as wires and cables, building panels, etc., the total addition amount can be reduced by 5%, while maintaining the same flame retardant effect, and the mechanical property retention rate is increased by 12%.
What is the difference between Tri-Pentearythritol (Micronized) and other carbon source materials?
Compared with pentaerythritol, Tri-Pentearythritol (Micronized) has better thermal stability, with a weight loss rate of only 3% at 280°C, while pentaerythritol reaches 15%, so it can withstand high-temperature processing. The hydroxyl density is higher, the reaction rate with APP is 20% faster, the carbon layer formation time is shortened to 15 seconds, and the fire retardant is faster. In polyvinyl chloride (PVC), its ultra-fine particles make the surface gloss of the product reach 85GU, which is 30GU higher than that of ordinary carbon sources, solving the surface roughness problem caused by flame retardants. Although the cost is 30% higher than pentaerythritol, the amount is reduced by 25% when the same expansion ratio is achieved, and the carbon layer strength is 2 times higher. The overall cost-effectiveness is better, and it is the preferred carbon source for high-end intumescent flame retardant systems.
How is Tri-Pentearythritol (Micronized) compatible with different resins?
For polyethylene (PE), the addition amount is 10% (compounded with APP), the melt flow rate is retained at 80%, there is no precipitation in injection molding, and the light transmittance of the film product is 70%. In epoxy resin, it is mixed with MPP at a ratio of 1:2, and the curing strength reaches 110MPa, and the heat deformation temperature is 180℃, which is suitable for electronic packaging materials. When combined with polyurethane foam, it can inhibit burning dripping and increase the foam residual carbon rate from 5% to 30%, meeting the B1 grade requirements of building insulation materials. The surface of its ultra-fine particles is modified with hydroxyl groups, and it has good compatibility with polar and non-polar resins. Therefore, it can be used in multiple systems such as plastics, rubbers, and coatings, solving the problem of single adaptability of traditional carbon sources.
What are the details of storage and processing of Tri-Pentearythritol (Micronized)?
This product is vacuum packed in double-layer aluminum foil bags, 15kg per bag, with built-in desiccant and anti-static bag on the outside. Store in a cool and dry warehouse, temperature <30℃, relative humidity <50%, stacking height not more than 5 bags, ≥30cm from the wall, to prevent moisture absorption and caking. No need to dry before processing. When mixing with resin, it is advisable to use low-speed premixing (500 rpm) and high-speed dispersion (1500 rpm) to avoid dust flying. In the extruder, the temperature needs to be <260℃ to prevent hydroxyl decomposition, and the screw combination uses a weak shear configuration to protect the ultra-fine particle structure. If agglomeration is accidentally caused, after screening with a 60-mesh sieve, 95% of the particles can still maintain the original particle size, the flame retardant performance remains unchanged, and production continuity is ensured. Wear a dust mask during operation, install a high-efficiency dust collector in the workshop, and control the dust concentration to <5mg/m³, which meets occupational health standards.
