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Bisphenol Epoxy Diluent: Glycidyl Ether of Diols (I)

Bisphenol Epoxy Diluent: Glycidyl Ether of Diols (I)

A bifunctional epoxy diluent is a low-molecular-weight compound containing two epoxy groups in its molecule. These epoxy groups can directly participate in the curing reaction of epoxy resins, becoming an integral part of the cured network structure. In addition to diluting epoxy resins and reducing system viscosity, bifunctional epoxy diluents can also take part in the curing process through chemical reactions, thereby enhancing the performance of the cured product. The key characteristic of bifunctional epoxy diluents lies in the presence of two epoxy groups within their molecular structure, enabling them to react with multiple epoxy resin molecules during curing and form a denser crosslinked network. Among bifunctional epoxy diluents, diglycidyl ethers of diols are among the most common types. They are produced by reacting diol molecules with epichlorohydrin. Typical examples include: 1,4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and 1,6-hexanediol diglycidyl ether.

07

2024

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09

New Pentaerythritol Diacrylate as an Active Diluent

New Pentaerythritol Diacrylate as an Active Diluent

In fields such as radiation-curable coatings, inks, adhesives, and photosensitive resin plates, reactive diluents play a crucial role. They not only help reduce the viscosity of the formulation and improve application performance but also participate in the polymerization reaction, becoming an integral part of the cured material. Neopentyl glycol diacrylate (NPGDA), a bifunctional reactive diluent, demonstrates outstanding performance in these applications. NPGDA, short for neopentyl glycol diacrylate, features two acrylate functional groups, enabling it to react simultaneously with two molecular chain segments during the polymerization process and thus form a crosslinked structure. This bifunctional characteristic is the key foundation underlying NPGDA’s effectiveness as a reactive diluent.

06

2024

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09

Polyethylene glycol diacrylate reactive diluent

Polyethylene glycol diacrylate reactive diluent

Polyethylene glycol diacrylate (abbreviated as PEGDA) is a bifunctional acrylate reactive diluent. It is composed of ethylene glycol units linked to acrylate groups via ester bonds, forming either linear or branched polymer structures. Each molecule of PEGDA contains two acrylate groups, both of which are reactive functional groups capable of participating in chemical reactions. Due to the presence of two reactive acrylate groups, PEGDA can undergo crosslinking reactions simultaneously with multiple molecules during the curing process, thereby forming a stable network structure.

06

2024

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09

Bifunctional Acrylate Reactive Diluent (II)

Bifunctional Acrylate Reactive Diluent (II)

Dipropylene glycol diacrylate (DPGDA) and tripropylene glycol diacrylate (TPGDA) are bifunctional acrylate-based reactive diluents that exhibit excellent diluting properties. They can effectively reduce the viscosity of the formulation and improve application performance. Moreover, the crosslinked network structure formed after curing endows the cured film with a high degree of crosslinking density, thereby enhancing its mechanical properties and chemical resistance.

05

2024

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09

Bifunctional Acrylate Reactive Diluent (I)

Bifunctional Acrylate Reactive Diluent (I)

Bifunctional acrylate-based reactive diluents are a commonly used class of compounds in UV-curable systems. Their molecules contain two acrylate groups that can participate in the UV curing reaction. During the UV curing process, these diluents not only serve to dilute the formulation and adjust its viscosity but also undergo photoinitiated polymerization via their double bonds, forming a crosslinked structure that significantly enhances the physical and mechanical properties as well as the resistance of the cured film. Due to the presence of two reactive functional groups, their curing speed is faster than that of monofunctional diluents, thereby greatly improving production efficiency.

05

2024

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09

Vinyl-based reactive diluent

Vinyl-based reactive diluent

The core characteristic of vinyl-based reactive diluents is the presence of vinyl functional groups, which can participate in a variety of chemical reactions, such as free-radical polymerization, cationic polymerization, or anionic polymerization. This enables them to crosslink with other resins or monomers during the curing process, forming a robust cured film. Moreover, due to their electron-rich nature, these vinyl groups readily form stable carbocations, making them highly susceptible to cationic polymerization—a process characterized by fast polymerization rates and high conversion yields. In addition to their functions of diluting and adjusting viscosity, vinyl-based reactive diluents can also act as reactive monomers, incorporating themselves into the curing process and becoming an integral part of the cured film. For this reason, vinyl-based reactive diluents are also referred to as functional monomers or crosslinking monomers.

03

2024

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09

A Brief Discussion on Acrylate- and Methacrylate-Based Active Diluents

A Brief Discussion on Acrylate- and Methacrylate-Based Active Diluents

Acrylate-based reactive diluents are compounds containing acrylate functional groups that can participate in photocuring reactions, thereby becoming an integral part of the cured product. Methyl methacrylate-based reactive diluents are a subclass of acrylate-based reactive diluents; their molecular structure includes a methyl methacrylate functional group—a acrylate group with a methyl substituent. Like acrylate-based reactive diluents, they also possess the ability to participate in photocuring reactions and play an important role in photocurable materials. Methyl methacrylate-based reactive diluents and acrylate-based reactive diluents share a close relationship in terms of chemical structure and application fields, yet they also exhibit several distinct differences. In methyl methacrylate-based compounds, the functional group is the methyl methacrylate group (an acrylate group bearing a methyl substituent); whereas in acrylate-based compounds, the functional group is simply the acrylate group (without a methyl substituent). The primary difference between methyl methacrylate-based reactive diluents and acrylate-based reactive diluents lies in the presence of the methyl group. The introduction of the methyl group can influence the compound's physical properties, chemical behavior, and application performance.

03

2024

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09

Vinyl ether-based monofunctional reactive diluents

Vinyl ether-based monofunctional reactive diluents

The basic structure of monofunctional vinyl ether-based reactive diluents includes one or more vinyl (C=C double bond) ether groups, which are attached either at one end or in the middle of a hydrocarbon chain. This structural feature enables them to react with other components in the resin system via free-radical polymerization or cationic polymerization during the curing process, thereby forming a stable crosslinked network.

02

2024

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09

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