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Special Types of Inactive Diluents (I)

Special Types of Inactive Diluents (I)

Non-reactive diluents based on aliphatic hydrocarbons consist primarily of linear or cyclic hydrocarbons. Common aliphatic hydrocarbon solvents include No. 200 solvent gasoline, kerosene, and diesel oil. These solvents have relatively simple molecular structures, composed mainly of carbon and hydrogen atoms, and do not contain other elements or functional groups such as oxygen, nitrogen, or sulfur. Non-reactive aliphatic hydrocarbon diluents are widely used in fields such as coatings, paints, and adhesives. They are primarily employed to reduce the viscosity of materials and improve their flowability, thereby facilitating easier application and construction.

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2024

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On Non-reactive Diluents for Aromatic Halogenated Hydrocarbons

On Non-reactive Diluents for Aromatic Halogenated Hydrocarbons

Aromatic halogenated hydrocarbons as non-reactive diluents can be classified into several types depending on the specific halogen atom involved. These compounds are formed when hydrogen atoms on the benzene ring are substituted by halogen atoms. Aromatic halogenated hydrocarbons as non-reactive diluents can be further divided into various subtypes, such as chlorobenzene, bromobenzene, and fluorobenzene. Among these, chlorobenzene derivatives (including chlorobenzene, dichlorobenzene, and trichlorobenzene) are among the most commonly encountered. In the chemical industry, these compounds are frequently used as diluents. Due to their relatively stable chemical properties and their tendency not to readily participate in reactions, they are referred to as non-reactive diluents.

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2024

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Introduction to Non-reactive Diluents for Aromatic Halogenated Hydrocarbons

Introduction to Non-reactive Diluents for Aromatic Halogenated Hydrocarbons

Alicyclic halogenated hydrocarbons, as non-reactive diluents, are primarily based on the skeletal structure of alicyclic hydrocarbons, in which one or more hydrogen atoms are replaced by halogen atoms (fluorine, chlorine, bromine, or iodine), forming halogenated hydrocarbon compounds. This structural feature endows them with both the stability characteristic of alicyclic hydrocarbons and the unique properties of halogenated hydrocarbons. Depending on the number of halogen substitutions, these diluents can be classified into monohalogenated alicyclic hydrocarbons and polyhalogenated alicyclic hydrocarbons. Furthermore, based on the number of rings in the alicyclic hydrocarbon, they can also be categorized into monocyclic, polycyclic, and types with special structural features.

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2024

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08

Aliphatic halogenated hydrocarbons in inactive diluents

Aliphatic halogenated hydrocarbons in inactive diluents

Halogenated hydrocarbon non-reactive diluents are characterized by the substitution of hydrogen atoms in their molecules with halogen atoms (such as fluorine, chlorine, bromine, and iodine), which endows them with unique physicochemical properties. There are numerous types of halogenated hydrocarbon non-reactive diluents, and they can be classified into various categories depending on the type of halogen atom and the position of substitution. Among the commonly used chlorinated hydrocarbon non-reactive diluents are chloromethane, dichloromethane, trichloromethane, and carbon tetrachloride; brominated hydrocarbon non-reactive diluents include bromomethane and dibromomethane.

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2024

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Types and Properties of Inactive Diluents (Part 4)

Types and Properties of Inactive Diluents (Part 4)

This article primarily introduces ester-based inactive diluents, a class of inactive diluents within the category of non-reactive diluents. The core structure of these diluents is built around ester bonds—functional groups formed through a dehydration condensation reaction between carboxylic acids and alcohols. The main components of this group include a range of ester compounds, such as ethyl acetate, butyl acetate, and amyl acetate. A key characteristic of these compounds is that they do not carry any active functional groups capable of directly participating in chemical reactions. Moreover, thanks to their unique molecular structures, ester-based inactive diluents generally exhibit low viscosity and excellent solubility, enabling them to mix uniformly with a variety of materials, including resins and paints.

14

2024

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Types and Properties of Inactive Diluents (Part 3)

Types and Properties of Inactive Diluents (Part 3)

This article primarily introduces ether-based inactive diluents, which are organic solvents containing ether linkages—functional groups in which an oxygen atom is bonded to two hydrocarbon radicals. The main components of these ethers are various ether compounds, which typically exhibit low viscosity and excellent solubility, allowing them to mix well with resins, paints, and other materials. Since these diluents do not contain any active functional groups capable of participating in chemical reactions, their primary role during dilution is to achieve physical mixing and reduce viscosity. In addition, ether-based inactive diluents possess good volatility and stability; they can evaporate rapidly during the application process without compromising the performance of the cured product. There are many types of ether-based inactive diluents, with common examples including glycol ethers, propylene glycol ethers, and diethylene glycol ethers.

14

2024

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08

Types and Properties of Inactive Diluents (Part 2)

Types and Properties of Inactive Diluents (Part 2)

The application of inert diluents in epoxy resins plays a critical role. They are primarily used to reduce the viscosity of the curing system and significantly enhance the resin’s flowability. Importantly, while improving the workability of epoxy resins, inert diluents do not negatively affect the fundamental properties of the cured material. This means that after adding the diluent, the cured epoxy product can still maintain its original physical and chemical properties—such as strength, hardness, and resistance to chemical corrosion—thereby ensuring the quality and reliability of the final product.

13

2024

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08

Types and Properties of Inactive Diluents (Part 1)

Types and Properties of Inactive Diluents (Part 1)

Non-reactive diluents, also known as non-reactive diluents, inert diluents, or physical diluents, do not participate in chemical reactions during the curing process of resins or coatings. Their primary functions are to reduce the concentration of reactants, lower the viscosity of the system, improve reaction conditions, or enhance reaction efficiency, thereby making it easier to mix, apply, or process the resin or coating. These diluents typically exhibit characteristics such as inertness, stability, and chemical neutrality. During the curing process, non-reactive diluents either completely volatilize or, after curing, remain in the material as fillers without altering its chemical structure, nor affecting the reaction mechanism or the properties of the final product.

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2024

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