Coating with organic peroxide crosslinking agent

Coating with organic peroxide crosslinking agent,The hydrogen in the hydrogen peroxide is alkyl and acyl groups, such as aromatic organic replacement and form containing - O - O - oxygen functional groups of organic compounds. Feature is heated above a certain temperature after can produce oxygen free radicals, decomposition is not stable, easy to decompose.

Chemical production of organic peroxide owner if used as a polymerization initiator, catalyst of synthetic resin. In the field of polymer material, it can be used as a radical polymerization initiator, grafting reaction initiator, crosslinking agent of rubber and plastic, curing agent of unsaturated polyester and spinning grade polypropylene preparation of molecular weight and molecular weight distribution of the regulator.

Environmental pollution in the air under the effect of light through the free radical reaction can produce acyl peroxide, nitric acid ester compounds is one of the seed of photochemical oxidants. To the skin, eyes, mucous membrane has a strong irritating, is an important pollutants in the atmosphere. Such substances belong to the inflammable and explosive dangerous goods, in use should pay attention to safety. General with active oxygen content, activation energy, half-life and decomposition temperature of four indicators as the basic basis to choose.

The vast majority of organic peroxide as colorless to pale yellow liquid, or a white powder state to the solid crystalline state. Most generally has a weak acid, insoluble in water, soluble in dimethyl phthalate and organic solvents, such as inflammable and explosive compound is a kind of unstable.

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. Benzoyl peroxide BPO, for example, usually as a radical polymerization initiator and unsaturated polyester curing agent; Two ethylene-propylene benzene peroxide DCP can be used as crosslinking agent and initiator of melt grafting. General with active oxygen content, activation energy, half-life and decomposition temperature of four indicators as the basic basis to choose.

Benzoic acid peroxide is the earliest and the commonly used organic peroxide, for the grain of a crystalline solid, thermal stability at ambient temperature. To improve security, benzoic acid peroxide can add 22% or 22% (weight) of water became wet products, to reduce the flammability and shock sensitivity. In addition, there are concentration was 25% ~ 50% of benzoic acid peroxide paste formula.

Benzoic acid peroxide in wide temperature range can be used for curing polyester. It can be tertiary amine activation, at room temperature and in 250 ~ 300 ° F temperature range for sulfide fill polyester composites. In the suspension polymerization of styrene, benzoic acid peroxide can serve as a good initiator.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).


Methyl ethyl ketone peroxid (MEKP) is widely used for curing of unsaturated polyester resin, the most common forms of goods made by ketone react with hydrogen peroxide, containing a mixture of peroxides and hydrogen peroxide. Because pure ketone peroxide is sensitive to vibration and friction, the goods only sold in the form of dilution, usually in the plasticizer of reactive oxygen species in the solution is highest do not exceed 9%.

The widest range of ester peroxide activity is one of the largest peroxide sales. Such as new heptanoic acid peroxide, 1, 1 - dimethyl - 3 - hydroxyl butyl ester, new decanoic acid peroxide. Isopropyl benzene ester, new decanoic acid peroxide tert-amyl ester or new pentanoic acid peroxide tertiary butyl ester peroxide is one of the most reactive compounds, mainly used for ethylene and vinyl chloride polymerization initiator. All these ester peroxide to storage at low temperature.

Ester peroxide like a bitter tert-amyl ester and octylic acid tert-butyl ester slightly lower reactivity, can be mild cold storage, a large number of used for ethylene polymerization and unsaturated polyester molding curing initiator.

Overly benzoic acid tert-amyl ester and benzoic acid tert-butyl ester such ester peroxide lowest reactivity, therefore the best thermal stability, can be stored at ambient temperature, curing initiator for flake material model.

When choosing ester peroxide, should notice the isopropyl phenyl ester peroxide reaction activity, in the rest of the order: uncle octyl ester peroxide, tertiary amyl ester peroxide, tert-butyl ester peroxide.

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