Common organic peroxide coating crosslinking agent

Common organic peroxide coating crosslinking agent

DCP: namely dicumyl peroxide, the most commonly used, 1.08 g/cm3 density, melting point 42 ℃ and decomposition temperature of 120 ~ 125 ℃, the refractive index of 1.54, 117 ℃ has a half-life of 10 hours, often associated with zinc oxide and use, improve the strength and aging resistance.

BPO: benzoyl peroxide, white powder, melting point of 103 ~ 106 ℃, unstable, insoluble in water, slightly soluble in organic solvents.

DTBP: i.e. tertiary butyl peroxide, yellowish transparent liquid, density of 0.8 g/cm3, boiling point 110 ℃, flash point 183 ℃, the refractive index of 1.4, 126 ℃ has a half-life of 10 hours.

DBHP: hydrogen peroxide diisopropyl benzene, light yellow liquid, heat or contact with acid base easily decomposed.

And diethylene triamine (DTA), also called diethylenetriamine, colorless liquid, the boiling point 207 ℃, 0.954 g/cm3 density, refractive index of 1.5, flash point 94 ℃, commonly used in epoxy resin, the general content 5% ~ 10%.

Double 25:2, 5 - dimethyl - 2, 5 two tertiary butyl peroxide hexane, referred to as "double 25, there are two kinds of its products, a pale yellow liquid, purity 90% density of 0.85 g/cubic centimeters; Another 50% purity of white powder, decomposition temperature of 179 ℃ (half-life 1 minute), and 118 ℃ (has a half-life of 10 hours). Double 25 is a kind of high temperature crosslinking agent, which is used in ethylene acetate copolymer, polyethylene, chlorinated polyethylene, etc., which can improve the strength and hardness of the products.

2 - ethyl - 4 methyl imidazole, 2 - phenyl imidazole, 2 - isopropyl imidazole, four six hydrogen gas phthalic anhydride, phthalic anhydride, sanya ethyl amine, dimethylamino propylamine, diethylamine propylamine, etc are also crosslinking agent, the most used for thermosetting plastics, used as curing agent.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Raw material ：

TDA industrial, Sichuan production

Ethylene (Et) polymer grade, Shanghai production

TEA industrial imports

A reagent grade additives


Matters needing attention

When using crosslinking agent, should avoid to add acid packing, also be careful when adding antioxidants and other aromatic oil additives on crosslinking effects will have bad influence, it is important to note that.

Polyethylene (PE) cable, pipe and other products after crosslinking, product performance is greatly improved, such as mechanical properties, thermal properties and environmental stress cracking resistance (ES - CR has been greatly improved, is used to this kind of product varieties of crosslinking agent, besides using dicumyl peroxide also useful silane graft crosslinking.

The silica content of a vinyl triethyl oxide (A1522) is 13.5% ~ 14.5%, which is a crosslinking agent.

In this case, A151 is a crosslinking agent, DCP is a grafting agent, and dibutyltin dibutyltin is the catalyst for grafting. The production process adopts the two-step method or one-step method to get the crosslinking product. Crosslinked PE tube can be used to carry hot water, gas, chemical corrosive liquid etc.

Main varieties of organic peroxide hydrogen peroxide (ROOH), dialkyl peroxides (ROOR '), acyl peroxide (RCOOOOCR '), ester peroxide (RCOOOR '), carbonate peroxide (ROCOOOOCOR ') and ketone peroxide [R2C (OOH) 2], and so on, each with different application characteristics. For example, benzoyl peroxide BPO is commonly used as the initiator of free radical polymerization and the curing agent of unsaturated polyester. Diethylene glycobenzene DCP is used as a trigger for crosslinking and fusion grafting. The basic basis of the selection of active oxygen content, activation energy, half-life and decomposing temperature are four indexes.

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Diethyl toluene diamine(DETDA)  http://www.yaruichem.com