Di-Pentaerythritol 85-95% min. (Micronized)
| HS Code | 765755 |
| Chemical Name | Di - Pentaerythritol |
| Purity | 85 - 95% min. |
| Physical State | Micronized (powder - like, fine particles) |
| Molecular Formula | C10H22O7 |
| Molar Mass | 254.28 g/mol |
| Appearance | White powder |
| Odor | Odorless |
| Solubility | Slightly soluble in water |
| Melting Point | Approx. 225 - 230 °C |
| Density | Approx. 1.35 g/cm³ |
| Flash Point | Approx. 274 °C |
As an accredited Di-Pentaerythritol 85-95% min. (Micronized) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Encapsulation of Di-Pentaerythritol 85-95% min. (Micronized) , industrial grade is packed in plastic woven bags, with inner film inside, tied with ropes to prevent moisture intrusion; high-end grade is tightly sealed in aluminum foil bags, air is removed, wrapped in foam plastic, and placed in a solid cardboard box, with the words "Micronized, handle with care" clearly marked on the outside of the box. |
| Storage | Storing Di-Pentaerythritol 85-95% min. (Micronized) requires a dry, cool, and ventilated warehouse. Use wooden pallets to raise it off the ground and away from the wall. The stacking should not be too high, and the limit is three layers. In this way, air can flow freely, which can prevent it from absorbing moisture and agglomerating, and also ensure that its quality is long-term stable and not disturbed by the surrounding environment. |
| Shipping | When transporting Di-Pentaerythritol 85 - 95% min. (Micronized), a boxcar should be used, and the canopy should be covered with thick tarpaulin to protect it from wind and rain and prevent it from getting wet. During loading and unloading, workers should handle it with care and not drop or press it. If the packaging is damaged, it should be replaced immediately, and the scattered powder should be properly collected to avoid polluting the environment and ensure the quantity of the product is intact. |
Competitive Di-Pentaerythritol 85-95% min. (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.
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Historical Development
In ancient times, chemical industry was not popular, and most of the materials used were natural materials. However, in order to make the materials durable and fireproof, craftsmen often thought of ways to improve them. Since the art of organic synthesis gradually became popular, polyol compounds began to enter the public's field of vision. Pentaerythritol first appeared, and with its unique structure, it has emerged in many fields. After repeated research, chemists found that two molecules of pentaerythritol can be connected by a specific process to obtain Di-Pentaerythritol. At first, its purity was not high, and the preparation method was complicated and costly, so it was only tried in a few high-end experiments.With the advancement of science and technology, the preparation process is constantly innovating, the reaction conditions can be precisely controlled, and the separation and purification techniques are becoming more sophisticated, so that high-purity Di-Pentaerythritol can be obtained. In order to make it more evenly dispersed in various material systems, micronization technology came into being, and Di-Pentaerythritol 85-95% min. (Micronized) was born. Today, it is an indispensable raw material in industrial fields such as coatings, plastics, and rubber.
Product Overview
Di-Pentaerythritol 85-95% min. (Micronized) is in the form of white ultrafine powder, which is fine and uniform, and has no odor. It has the characteristics of polyols, contains multiple hydroxyl functional groups, and has high chemical activity. Although it is in the form of micronized powder, it can be evenly dispersed in many organic solvents and can also be mixed with some inorganic materials. The purity of this product is between 85% and 95%, which can meet the needs of most industrial scenarios. It can be used as a cross-linking agent, flame retardant raw material, plasticizer, etc. It is widely used in the manufacture of high-performance coatings, engineering plastics, and rubber products to improve the mechanical properties, thermal stability, and fire retardancy of the materials.
Physical & Chemical Properties
Its physical properties are unique, with a moderate density of about [X] g/cm³, which is easy to mix and formulate with other materials. The particle size is extremely fine, mostly between [X] μm, and it feels like slippery powder, which allows it to contact the surrounding materials more fully during the dispersion process. The melting point is relatively high, reaching [specific melting point value] ℃. At normal processing temperatures, it can maintain solid stability and is not easy to melt and deform. It is slightly soluble in water, but easily soluble in organic solvents such as alcohols, ethers, and esters, and exhibits good solubility and dispersibility in different solvents.In terms of chemical properties, the hydroxyl groups in its molecules are easily esterified with acids to form various ester compounds, which are widely used in the fields of plasticizers and lubricants. When exposed to high temperatures, decomposition reactions will occur. The decomposition products can form a dense carbon layer on the surface of the material, isolating oxygen and heat, and exerting a flame retardant effect. Under normal temperature and humidity conditions, the chemical properties are stable, and it is not easy to react chemically with common substances. It can be stored for a long time without changing its performance.
Technical Specifications & Labeling
Di - Pentaerythritol 85 - 95% min. (Micronized) has strict technical standards. The purity must reach 85% - 95%, which is the basis of performance. Insufficient purity will reduce activity and affect the use effect; the hydroxyl value must meet a specific range to ensure its chemical reaction activity; the moisture content is extremely low, ≤ [X]%, and excessive moisture will interfere with chemical reactions and may also cause product agglomeration; the particle size distribution is uniform, and the D50 value is around [X]μm, ensuring the consistency of its dispersion in the material.The product label is very important, and the full name Di - Pentaerythritol 85 - 95% min. (Micronized) must be written to be eye-catching. Various technical indicators are listed in detail, such as purity range, hydroxyl value, moisture content, particle size data, etc., for users to verify. It also marks the applicable material types, recommended addition ratios, storage conditions, shelf life and other information to facilitate manufacturers to use and store correctly.
Preparation Method
To prepare Di - Pentaerythritol 85 - 95% min. (Micronized), first take high-quality pentaerythritol as raw material and place it in a reactor. Add an appropriate amount of catalyst and adjust the reaction temperature, pressure and time. Introduce the reaction reagent in a specific ratio to promote the condensation reaction of two molecules of pentaerythritol to generate Di - Pentaerythritol crude product. During the reaction process, it is necessary to accurately monitor various parameters and make fine adjustments in time according to actual conditions to ensure the smooth progress of the reaction.
After the reaction is completed, it is cooled and filtered to remove unreacted raw materials and impurities. The resulting product is then purified by recrystallization to improve purity. Finally, the ultrafine grinding technology is used to grind it to the required particle size, sieve and grade it to obtain Di-Pentaerythritol 85-95% min. (Micronized). The whole process is rigorous and each link is closely linked to ensure the stability of product quality.
After the reaction is completed, it is cooled and filtered to remove unreacted raw materials and impurities. The resulting product is then purified by recrystallization to improve purity. Finally, the ultrafine grinding technology is used to grind it to the required particle size, sieve and grade it to obtain Di-Pentaerythritol 85-95% min. (Micronized). The whole process is rigorous and each link is closely linked to ensure the stability of product quality.
Chemical Reactions & Modifications
Di-Pentaerythritol 85-95% min. (Micronized) has high chemical activity and can participate in a variety of reactions. It reacts with fatty acids to generate ester compounds, which are used to synthesize high-grade lubricants and plasticizers to improve product performance. In the flame retardant system, the substances produced by thermal decomposition can promote the formation of carbon layer and enhance the flame retardant effect of the material. In order to further optimize the performance, it is often modified. For example, it is treated with surfactants to change its surface properties and improve its dispersibility in the material; or it is compounded with other functional compounds to work synergistically and expand the scope of application.
Synonyms & Product Names
Di-Pentaerythritol 85-95% min. (Micronized) is also known as "Dipentaerythritol (85-95%, Micronized)". However, in trade transactions and technical documents, in order to ensure the accuracy of information and avoid confusion, it is often referred to by its full name Di-Pentaerythritol 85-95% min. (Micronized) to clarify its purity specifications and micronized characteristics.
Safety & Operational Standards
When operating Di-Pentaerythritol 85-95% min. (Micronized), workers should prepare protective equipment. Wear dust masks to prevent micronized powder from being inhaled into the lungs and damaging the respiratory system; wear protective gloves to avoid direct skin contact with it to prevent allergies or other discomfort. It is advisable to operate in a well-ventilated place to allow air circulation and dispel possible odors and dust. After work, be sure to wash your hands, change clothes, and remove the chemicals on your body.When storing this agent, the warehouse must be away from fire and heat sources. It is forbidden to mix it with oxidants, strong acids, strong alkalis and other substances, because they may cause chemical reactions and endanger safety. The packaging must be intact. If it is damaged, it must be replaced in time to prevent the product from getting damp and deteriorating. When transporting, handle it with care to prevent the packaging from breaking and causing the product to scatter.
Application Area
In the coating industry, Di-Pentaerythritol 85-95% min. (Micronized) can be used as a cross-linking agent to react with resin molecules to form a three-dimensional network structure, improve the hardness, wear resistance and weather resistance of the coating, and is widely used in high-end coatings such as automotive paints and industrial anti-corrosion paints. In the field of plastics, it can be used as a flame retardant raw material, and cooperate with other flame retardant ingredients to give plastics excellent fire retardant properties. It is used to manufacture electrical housings, wire and cable insulation layers, etc. In rubber products, adding this product can improve rubber processing performance, enhance vulcanization effects, and improve rubber product strength and heat resistance. It is used in the manufacture of tires, seals and other products.
Research & Development
At present, researchers are continuously deepening their research on Di-Pentaerythritol 85-95% min. (Micronized). On the one hand, they are exploring its application in new material systems, such as in degradable plastics and high-performance composite materials, to explore its new functions and potential; on the other hand, they are optimizing the preparation process, seeking greener, more efficient and low-cost methods, reducing energy consumption, reducing pollution and improving product competitiveness. They are also working hard to develop new modification technologies to make it more compatible with other materials and more excellent in performance to meet the ever-evolving industrial needs.
Toxicity Research
After rigorous toxicity testing, Di-Pentaerythritol 85-95% min. (Micronized) has low toxicity. In oral tests on experimental animals, the LD50 value is much higher than the safety standard and is in the low toxicity category. It has no obvious irritation to the skin and eyes, and long-term contact has no teratogenic or carcinogenic risks. However, during the production operation, protection is still required to avoid large amounts of inhalation of dust to prevent slight irritation to the respiratory tract. Under normal use and storage conditions, it is safe and harmless to the environment and human body.
Future Prospects
Looking to the future, as industrial technology continues to advance, the demand for high-performance materials is growing, and Di-Pentaerythritol 85-95% min. (Micronized) has broad prospects. It is expected to play an important role in emerging fields such as new energy vehicle battery materials and 5G communication equipment heat dissipation materials. As environmental protection requirements become stricter, green preparation processes will become the mainstream, and product purity and performance will continue to improve, further expanding market space, occupying a more important position in the field of chemical materials, and injecting new impetus into industrial development.
Where to Buy Di-Pentaerythritol 85-95% min. (Micronized) in China?
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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 Di-Pentaerythritol 85-95% min. (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 are the details of the purity range control during the preparation of TDi-Pentaerythritol 85-95% min. (Micronized)?
This product is made from the crude product of the condensation reaction of formaldehyde and acetaldehyde as the base material, and is crystallized and purified in steps: first, the crude product is dissolved in 75℃ hot water (solid-liquid ratio 1:5), filtered to remove the residue, and the filtrate is cooled to 35℃ to precipitate 95% grade crystals; the mother liquor is heated to 60℃, and then cooled to 25℃ to obtain 90% grade; the remaining mother liquor is concentrated and cooled to 15℃ to obtain 85% grade. Each grade of crystals is separately pulverized by air flow, with a nitrogen pressure of 0.75MPa and a classifying wheel speed of 3200 rpm to make a D50=4μm powder, namely TDi-Pentaerythritol 85-95% min. (Micronized). The hydroxyl content of 95% grade is 39%±0.4%, and the ash content is less than 0.08%; the hydroxyl content of 85% grade is 36%±0.6%, and the ash content is less than 0.15%. When crushing, the jacket is passed with cooling water, and the temperature is controlled at less than 55℃ to prevent particle agglomeration. The loose density of the powder is 0.38g/cm³ and the specific surface area is 12m²/g. This process is like sieving grains, separating them according to the purity gradient, so that each level of products can be adapted to different flame retardant scenarios, taking into account both performance and cost.
What is the synergistic effect of TDi-Pentaerythritol 85-95% min. (Micronized) in flame retardant cable materials?
The 95% grade product is compounded with ammonium polyphosphate (APP) at a ratio of 1:4, and the total addition amount is 35% for EVA cable material (VA content 28%). After mixing in a twin-screw extruder (temperature 160-180℃), the cable sheath expands within 30 seconds when burning. The thickness of the carbon layer reaches 18 times the original diameter, the carbon layer density is 0.2g/cm³, and the thermal conductivity is 0.03W/(m・K). The vertical burning test reaches UL94 V-0 level (3.2mm), and the oxygen index increases from 20% to 33%, which is 3 percentage points higher than the 85% grade. The 90% grade is used for low-smoke halogen-free cable material, compounded with magnesium hydroxide at a ratio of 2:5, with an addition amount of 40%, and a smoke density rating (SDR) of 42, which is much lower than the 70 of pure EVA, and the tensile strength is retained by 82% (12MPa). The 85% grade is suitable for ordinary cables, with an addition amount of 45%. The cost is 12% lower than that of the 95% grade, and the flame retardant time is 60 minutes, meeting the basic flame retardant requirements. Its ultra-fine particles (4μm) can fill the gaps in the cable materials and increase the surface smoothness of the sheath by 15%. Therefore, it can be selected according to performance requirements in cable flame retardancy to balance the effect and economy.
What are the characteristics of the synergistic mechanism of TDi-Pentaerythritol 85-95% min. (Micronized) and phosphorus flame retardants?
When this substance is matched with Melamine Polyphosphate (MPP), the hydroxyl group and the phosphate group in the molecule undergo esterification reaction at 280℃ to generate a polyphosphate intermediate, and the catalytic substrate carbonization rate is 30% faster than that of single use. The 95% grade and MPP are compounded in a ratio of 1:2 for PA66. The carbon layer formation time during combustion is 18 seconds, which is 5 seconds shorter than the 85% grade. This is because the high-purity product has a high hydroxyl density and stronger reaction activity. In the PP system, it can promote the combination of carbon layer and phosphorus oxide to form a dense protective layer in synergy with phosphate flame retardant, and increase the residual weight of carbon layer from 25% to 40%. Its ultrafine particles (4μm) can be evenly dispersed among flame retardants, increasing the reaction contact area, increasing the synergistic efficiency by 20%, solving the problem of flame retardant fluctuation caused by uneven dispersion in traditional compounding, so it can stably play a synergistic role in multiple systems.
What is the difference between the application of TDi-Pentaerythritol 85-95% min. (Micronized) in coatings and adhesives?
When used in solvent-based fire retardant coatings, the 95% grade is compounded with expanded graphite at a ratio of 3:1, with an addition amount of 55%. The coated steel plate (dry film 1mm) can withstand 1000℃ flame burning for 75 minutes, the back temperature is less than 145℃, and the adhesion is level 1. The 90% grade is used for water-based coatings and is compatible with ammonium polyphosphate. The dispersion stability is up to 5 months, the coating water resistance (immersion for 6 days) is wrinkle-free, and the cost is 8% lower than the 95% grade. In polyurethane adhesives, the 85% grade is added at a 15% amount, reacting with isocyanate to form a flame-retardant cross-linked structure, so that the bonding strength is retained by 85% (2.5MPa), and the oxygen index is increased from 21% to 28%. Its ultra-fine particles can fill the micropores of coatings and adhesives, and increase the density of dry films by 18%. Therefore, it can be selected according to the purity in different dosage forms, which can not only ensure flame retardant performance, but also adapt to product characteristics.
What is the processing adaptability of different purity levels of TDi-Pentaerythritol 85-95% min. (Micronized)?
The 95% grade is suitable for precision injection molding parts, such as electronic connectors. It needs to be mixed with APP in a precise ratio (1:3.5), with a twin-screw speed of 280 rpm, a temperature control of 200-220℃, and high-temperature decomposition prevention. The product size accuracy reaches ±0.02mm. The 90% grade is used for extruded sheets, with an addition amount of 38% and a screw speed of 220 rpm. Due to its slightly lower purity, it can withstand slightly higher shear and is not prone to melt fracture. The 85% grade is used for molded products, such as distribution box shells, with an addition amount of 42%, a processing temperature of 180℃, and a pressure of 15MPa. Due to its low cost, it is suitable for large-scale production. During storage, the 95% grade needs to be controlled to be less than 45%, and the 85% grade can be relaxed to less than 65%. Each grade needs to be stored in a partition to avoid mixing. In terms of processing equipment, 316 stainless steel is used for high-purity grades, and carbon steel can be used for low-purity grades. The equipment is selected according to product requirements to ensure stable performance.
