Crosslinking agents are divided into external crosslinking agents and internal crosslinking agents

Crosslinking agents are divided into external crosslinking agents and internal crosslinking agents:

1. Diplomatic liaison agent

The so-called diplomatic crosslinking agent is added before use, and then undergoes crosslinking reaction at room temperature, heating or irradiation. Crosslinking agent manufacturers, in addition to crosslinking agents, are divided into the following categories:

⑴ Polyisocyanates (JQ-1 JQ-1E、JQ-2E、JQ-3E、JQ-4、JQ-5、JQ-6、PAPI、 Emulsifiable MDI, Tetraisocyanate)

⑵ Polyamines (propanediamine, MOCA)

⑶ Polyols (polyethylene glycol, polypropylene glycol, trimethylolpropane)

⑷ Glycyrrhetinic ether (polypropylene glycol diglycidyl ether)

⑸ Inorganic substances (zinc oxide, aluminum chloride, aluminum sulfate, sulfur, boric acid, borax, chromium nitrate)

Organic compounds (styrene, alpha methylstyrene, acrylonitrile, acrylic acid, methacrylic acid, glyoxal, aziridine)

Organic silicon (ethyl orthosilicate, methyl orthosilicate, trimethoxysilane)

Benzene sulfonic acids (p-toluenesulfonic acid, p-toluenesulfonyl chloride)

Acrylic esters (1,4-butanediol diacrylate, ethylene glycol dimethacrylate, TAC, butyl acrylate, etc.) HEA、HPA、HEMA、HPMA、MMA）

Organic peroxides (diisopropylbenzene peroxide, bis (2,4-dichlorobenzoyl peroxide))

11. Metal organic compounds (aluminum isopropoxide, zinc acetate, titanium acetylacetonate)

12. Aziridines

13. Multi functional polycarbodiimide crosslinking agent

③ Closed crosslinking agent

Isocyanate crosslinking agent

2. Internal crosslinking agent

The so-called internal crosslinking agent refers to a monomer that enters the human molecular structure chain during polymerization, or is added as a component to adhesives, which can be stored stably and can only undergo crosslinking reaction when heated to a certain temperature or radiation conditions. The commonly used internal crosslinking agents include vinyl monomers such as acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, methyl acrylic acid, hydroxyethyl methacrylate, hydroxypropyl methacrylate, divinylbenzene, N-hydroxymethylacrylamide, and diacetone acrylamide.