Crosslinking agent DCP coatings

Crosslinking agent DCP coatings,Diisopropyl benzene, white diamond crystal. Melting point 41 ~ 42 ℃. Relative density (20 ℃ / 4 ℃) 1.082. Sublimation temperature 100 ℃ (26.7 Pa). Decomposition temperature of 120 ~ 125 ℃ (rapid decomposition). The refractive index of 1.5360. Flash point 133 ℃, flash point 218 ℃. At room temperature stability, see light gradually turn to microyellow.

Insoluble in water, soluble in ethanol, ether, acetic acid, benzene and petroleum ether. The product was given to mice by an oral LD of 50, 500 to 4000mg/kg. The skin is weak and stimulating. Active oxygen content is 5.92% (100% purity), 5.62% (95% purity). Dissolved in benzene half-life: 171 ℃ : 1 min. 117 ℃ : 10 h; 101 ℃ : 100 h. It's a powerful oxidizer.

Diisopropyl peroxide Cumin peroxide; Cumin tea; Curing agent DCP; Double (1-methyl-1-phenyl ethyl) peroxide.

It is mainly used as vulcanization agent of natural rubber, synthetic rubber, the initiator of polymerization reaction, and it can also be used as polyethylene resin crosslinking agent. Crosslinked polyethylene used for cable insulation materials, not only has excellent insulation and processability, and can improve its heat resistance, 100 polyethylene DCP2.4 sulfurizing agent.

The sulfide DCP can make the vinyl chloride copolymer (EVA) foam forming a fine, uniform foam, while improving the heat resistance and weatherability of the products. In addition, it is used as the curing crosslinking agent for unsaturated polyester.

Laboratory making. In the 500mL 3 reaction flask, add 121.6 g isopropyl hydroxide, 108.8 g-phenyl isopropyl, and 36g without water oxalic acid. 40 ℃ water bath, mixing reaction 8 h, after cooling, leach oxalic acid. Add 200mL of benzene to the filtrate.

To separate benzene layer, respectively with 4 mol/L NaOH solution and water after washing, vacuum distillation, the liquid temperature 95 ℃, 15 x 133.3 Pa before distillation, then the pressure drop in the (1 ~ 2) x 133.3 Pa, distillation under the same temperature, the crude products of 196 g. In methanol recrystallization a melting point of 40 ~ 41 ℃ dicumyl peroxide.

Production principle and process. With a reducing agent sodium sulfite isopropyl benzene peroxide hydrogen reduction of phenyl methanol, dimethyl which under the perchloric acid catalyst and hydrogen peroxide isopropyl benzene condensation, dicumyl peroxide after disposal.

Ingredients ratio (kg/t)

Isopropyl benzene peroxide (32% ~ 35%), 1500 fluid base (30%) 70

Sodium sulphate (96%) 980 perchloric acid (72%) 2




Chinese name: Diethyl toluene diamine(DETDA)

Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.

Density 1.022

Viscosity (20 ℃) ??mPa·ss290±10

Pour Point ℃-9

Boiling point of310°C

Flash Point°C161.1°C


The main equipment

Reduction reaction pot condensation reaction pot condensing the vacuum drying box

The production process

Will 78 isopropyl benzene hydrogen peroxide (32% or higher) and 98 sodium sulfite into aqueous solution into the reduction pot, heterogeneous reduction in 62 ~ 65 ℃, get two methyl phenyl methanol. Get two methyl phenyl methanol in 0.2 servings of perchlorate with 72 hydrogen peroxide in the presence of isopropyl benzene condensation under 42 to 45 ℃, the reaction dicumyl peroxide condensed liquid. After washing to neutral with 10% sodium hydroxide solution, points to the water, the vacuum distillation concentration, soluble in anhydrous ethanol in again below 0 ℃ cold crystallization, filtration, drying in vacuum dicumyl peroxide products. The filtrate recycles ethanol.

The raw material isopropyl benzene peroxide is a strong oxidant. The product is a primary organic oxide, which is caused by light or heat.

The iron drum package of the lined polyethylene plastic bag is marked with dangerous goods. Is stored in a cool, dry, avoid light, temperature not to exceed 30 ℃. Stay away from heat sources.

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