Preparation and application of 1,4-di-tert-butylperoxycumylbenzene_Kain Industrial Additive

Background and overview^[1]

1,4-Di-tert-butylperoxycumylbenzene is a high-grade cross-linking agent, mainly composed of a mixture of 1,3- and 1,4-isomers. This product is a white powder with a molecular weight of 338.49, theoretical active oxygen 9.45%, activation energy 36.1kcal/mol, and a half-life of 10 hours at 120°C.

Preparation^[1]

A production method of 1,4-di-tert-butylperoxycumylbenzene, including the following steps: adding reactant A: 1kg low-concentration tert-butyl hydroperoxide into the reaction kettle, and then separately Add 2g sodium carbonate and 150g sodium sulfate and stir to purify reactant A. After about 15 minutes, let it stand, separate the layers, and drain the bottom water phase. The concentration of purified reactant A is between 68%, and then add reactant B. : 0.5kg of diisopropyl alcohol, then add 90g of strong oxidizing catalyst C and 500g of sulfuric acid with a concentration of 65% for reaction. The reaction time is about 1.0h, under normal pressure, and the temperature is controlled between 50°C. After the reaction is completed Add 500g of deionized water, keep the water temperature between 25°C, stir for about 15 minutes, let it stand, and drain the lower water phase of the reactor after layering. The upper oil phase is the crude di(tert-butylperoxyisopropyl)benzene product. , the content is about 80%; after washing the crude product with 20% sodium hydroxide solution and 60°C hot water, a refined product is obtained, with the content reaching more than 92%.

Apply^[2-3]

CN201610781476.2 discloses an air compressor conveyor belt made of the following raw materials: EPDM rubber, polyisoprene rubber, modified chlorinated rubber, butadiene rubber, carbon fiber, 1,3-linked Phenylguanidine, zinc dimethyldithiocarbamate, N-(1,3-dimethylbutyl)-N’-phenyl-1,4-phenylenediamine, 1,4-bis-tert-butyl Cumene peroxide, 1,1′-(tetrathiodicarbothio)bipiperidine, bispentamethylenethiuram tetrasulfide, alkylphenol disulfide, zinc stearate, carbon black, Sodium silicate, sodium dodecyl diphenyl ether disulfonate, lanthanum oxide, cerium oxide. The conveyor belt of the invention has excellent heat resistance, antistatic performance and flame retardant performance. By adding a small amount of lanthanum oxide and cerium oxide, the tensile strength, belt back hardness and tooth shear strength of the conveyor belt are enhanced. By adding modified chlorinated rubber, combined with lanthanum oxide and cerium oxide, the corrosion resistance of the conveyor belt is greatly improved.

CN201510938395.4 discloses a montmorillonite-modified EPDM rubber pipe. Its raw materials include: EPDM rubber, butadiene rubber, silicone rubber, styrene-butadiene rubber, epoxy resin, liquid nitrile rubber, 1,2-polybutadiene, stearic acid, zinc oxide, 1,4-di-tert-butylperoxycumylbenzene, bis(diisopropyl)phosphoryl sulfide disulfide, sulfur, modified monoxide Free soil, magnesium hydroxide, magnesium methacrylate, carbon nanotubes, attapulgite, polyacrylonitrile fiber, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, polyphosphoric acid Ammonium, tricresyl phosphate, castor oil, silane coupling agent, 2-mercaptobenzothiazole, sodium dimethyldithiocarbamate, antioxidant. The montmorillonite modified EPDM rubber pipe proposed by the invention has high strength, good oil resistance, heat resistance and aging resistance, excellent flame retardant performance and long service life.

References

[1]CN201710945997.1 A production method of di(tert-butylperoxyisopropyl)benzene

[2]CN201610781476.2 An air compressor conveyor belt

[3]CN201510938395.4 A kind of montmorillonite modified EPDM rubber pipe