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Recommended UV Monomers

Release time:

2025-06-25 17:19

BM3231

BM3231, trimethylolpropane triacrylate, commonly referred to as TMPTA, is a trifunctional UV monomer widely used in UV coatings, UV inks, and other applications, and is currently the most extensively used polyfunctional UV monomer.
It has the following characteristics:
1. Rapid curing: Due to its three acrylate double bonds, TMPTA cures quickly under UV irradiation.
2. High gloss: The cured film exhibits a high degree of gloss, making it suitable for applications requiring a high-gloss finish.
3. High hardness: The cured film exhibits high hardness, making it suitable for surface coatings that require enhanced hardness.
4. High crosslink density: TMPTA can form a highly crosslinked network structure, thereby enhancing scratch resistance and wear resistance.
Although TMPTA offers numerous excellent performance characteristics, its cured film tends to be relatively brittle, which may limit its application in certain applications requiring flexibility. However, due to its low cost, it can serve as a cost-effective option, particularly in cost-sensitive applications such as paper varnishes and wood coatings.
In practical applications, TMPTA is typically used in combination with other UV monomers to achieve specific performance and curing characteristics.

BM3380

BM3380, ethoxylated trimethylolpropane triacrylate, commonly referred to as 3EO-TMPTA, is a trifunctional UV-reactive monomer widely used in UV coatings, UV inks, 3D printing, and other applications.
Compared with TMPTA, it has the following characteristics:
1. It has a lower viscosity than TMPTA; the viscosity of TMPTA is approximately 70–110 cP, whereas that of 3EO-TMPTA is only 50–70 cP. The reduced viscosity enhances the material’s flow and processability, making it easier to handle and apply in UV coatings, UV inks, and other applications.
2. Greater flexibility than TMPTA: With the introduction of ethoxy groups, the molecular weight increases and the polymer chains become longer.
As the number of ethoxy groups increases, the flexibility of the cured film improves: this enhanced flexibility helps reduce material brittleness, thereby improving durability and impact resistance in practical applications. Skin irritation is reduced: this is crucial for enhancing product safety and applicability. Water solubility increases: this facilitates application in waterborne UV-curing systems, broadening the range of potential uses.
Effective December 1, 2023, the European Chemicals Agency has classified TMPTA as a Category 2 carcinogen. The search for alternatives to TMPTA has thus become urgent. Ethoxylated TMPTA has emerged as one of the promising substitutes.

BM3235

BM3235, pentaerythritol triacrylate, abbreviated as PET3A, is a trifunctional UV-curable monomer with the following characteristics:
I. Contains hydroxyl groups
The hydroxyl groups in the PET3A molecule help enhance substrate adhesion by forming hydrogen bonds with polar functional groups on the substrate surface, thereby improving adhesion.
II. Fast Curing
PET3A cures rapidly, making it well suited for high-speed production processes. The cured film exhibits high hardness but tends to be brittle, which may limit its use in applications requiring high flexibility.
3. Chemical Resistance: The cured film formed by PET3A exhibits excellent chemical resistance, effectively withstanding the attack of a wide range of chemicals, making it suitable for applications that require chemical resistance.
IV. Synthetic Reactivity
Its hydroxyl groups can react with isocyanate (NCO) groups, enabling PET3A to be used in the synthesis of high-functionality polyurethane acrylates.
V. Crystallinity
PET3A exhibits a certain degree of crystallinity at low temperatures, which may affect its transparency and physical properties. However, heating can render the material transparent and restore its optical characteristics.
Due to the difficulty of separation during its synthesis, PET3A is typically contaminated with PET4A in the final product.
Currently, PET3A is primarily used for the synthesis of polyurethane acrylates and is less frequently employed as a UV monomer in formulations.

BM3384

BM3384, propoxylated glycerol triacrylate, also known as 3PO-GTA or GPTA, is a trifunctional UV-curable monomer.
It has the following characteristics:
I. Fast curing speed
As a trifunctional monomer, 3PO-GTA can rapidly undergo free-radical polymerization to form a three-dimensional network structure, thereby achieving rapid curing.
II. Good Flexibility
The molecular structure of 3PO-GTA incorporates propoxy groups, which help enhance the flexibility of the cured film and reduce its brittleness.
III. Low Skin Irritancy
Compared with HDDA and TMPTA, 3PO-GTA exhibits lower skin irritation, making it more suitable for applications that require low irritancy.
IV. Excellent pigment wettability
The molecular structure of 3PO-GTA facilitates improved pigment dispersion and wetting, which is crucial for the production of high-quality UV coatings and UV inks, enhancing both color strength and uniformity.
Due to its excellent pigment wettability, 3PO-GTA is currently primarily used in UV inks.

BM6261, BM6263

BM6261 and BM6263 are dipentaerythritol hexaacrylates, abbreviated as DPHA. Depending on the degree of esterification, the two grades are referred to as DPHA-80 and DPHA-90, respectively.
DPHA is a hexfunctional UV monomer.
It has the following characteristics:
I. High Viscosity
DPHA has a viscosity of nearly 10,000 cP at room temperature, which is so high that it can no longer be used as an reactive diluent.
2. High Reactivity: Due to the presence of multiple acrylate groups, DPHA exhibits very high reactivity during UV curing, enabling it to rapidly participate in the polymerization reaction and achieve fast curing.
3. High Cross-Link Density: The multifunctional nature of DPHA results in a highly cross-linked cured polymer, which significantly enhances the material’s hardness, wear resistance, and chemical resistance.
4. High Hardness: The cured film formed by DPHA exhibits high hardness, making it suitable for applications requiring excellent wear resistance and scratch resistance.
V. Excellent Wear Resistance: The high crosslink density and high hardness of DPHA result in outstanding wear resistance, making it suitable for applications with stringent wear-resistance requirements.
Due to the aforementioned characteristics, DPHA is currently commonly used in formulations requiring high hardness and excellent wear resistance.

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Knowledge and Applications of UV Monomers