Guangyuan Ruifeng New Materials - What are the types of PVC crosslinking agents?

Category: Crosslinking agent

Release Time: 2020-05-25

Summary: PVC crosslinking agents have different names in different industries. For example, in the rubber industry, they are commonly called "vulcanizing agents"; in the plastics industry, they are called "curing agents", "maturing agents", "hardening agents"; and in the adhesive or coating industry, they are called "curing agents", "hardening agents", etc.

PVC crosslinking agents have different names in different industries. For example, in the rubber industry, they are usually called "vulcanizing agents"; in the plastics industry, they are called "curing agents", "maturing agents", or "hardening agents"; and in the adhesive or coating industry, they are called "curing agents" or "hardening agents", etc. Although the names are different, the chemical properties and mechanisms they reflect are the same. They can transform linear or slightly branched macromolecules into three-dimensional network structures, thereby improving strength, heat resistance, wear resistance, and solvent resistance, and can be used in foamed or non-foamed products. (PVC crosslinking agent)

Common PVC crosslinking agents are organic peroxides:

① Dicumyl peroxide (DCP): The most commonly used, density 1.08 g/cm³, melting point 42℃, decomposition temperature 120~125℃, refractive index 1.54. The half-life at 117℃ is 10 hours. It is often used with zinc oxide to improve strength and aging resistance. (PVC crosslinking agent)

② Benzoyl peroxide (BPO): White powder, melting point 103~106℃, very unstable, insoluble in water, slightly soluble in organic solvents. (PVC crosslinking agent)

③ Di-tert-butyl peroxide (DTBP): Slightly yellow transparent liquid, density 0.8 g/cm³, boiling point 110℃, flash point 183℃, refractive index 1.4. The half-life at 126℃ is 10 hours. (PVC crosslinking agent)

④ Diisopropylbenzene hydroperoxide (DBHP): Light yellow liquid, easily decomposes when heated or in contact with acids and bases. (PVC crosslinking agent)

⑤ Diethylenetriamine (DTA): Also known as diethylenetriamine, colorless liquid, boiling point 207℃, density 0.954 g/cm³, refractive index 1.5. Flash point 94℃, commonly used in epoxy resins, generally added 5%~10%. (PVC crosslinking agent)

⑥ 2,5-Dimethyl-2,5-di-tert-butylperoxyhexane (bis-25): There are two types of this product, one is a 90% purity light yellow liquid with a density of 0.85 g/cm³; the other is a 50% purity white powder with a decomposition temperature of 179℃ (half-life 1 minute) and 118℃ (half-life 10 hours). Bis-25 is a high-temperature crosslinking agent, often used in ethylene-vinyl acetate copolymers, polyethylene, chlorinated polyethylene, etc., which can improve the strength and hardness of products. 2-Ethyl-4-methylimidazole, 2-phenylimidazole, 2-isopropylimidazole, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, triethylenetetramine, dimethylaminopropylamine, diethylaminopropylamine, etc. are also crosslinking agents, mostly used in thermosetting plastics as curing agents. (PVC crosslinking agent)

Guoyuan Ruifeng New Materials Co., Ltd. is a professional manufacturer of PVC crosslinking agents. We have mature production processes and can definitely meet your needs.

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