Amine mixed coating crosslinking agent

Amine mixed coating crosslinking agent,For some amine system of crosslinking agent on the physical method to change lives, toughening state aims to change or adjust the crosslinking reaction rate. For example, several kinds of eutectic amine according to certain proportion miscibility, form a eutectic, facilitate crosslinking operation.

If ZzL crosslinking agent is a mixture of several kinds of aromatic amine as follows: its appearance is amber transparent liquid. Aromatic amine mixed liquid fat amine and solid. Liquid mixture formation, such as crosslinking agent of 708 was contained imidazoles promoter m-phenylene dimethylamine and 4, 4 - a mixture of two amino phenyl methane.

Solid aromatic amine liquid, but also adopt the method of preparation of supercooled liquid. Such as m-phenylene diamine heating melting, heating up to 115-120 ℃. Insulation 5 min, and then the natural cooling for a quick m-phenylene diamine supercooled liquid, facilitate crosslinking operation.

Another. As a physical method to change lives, such as mixed with liquid rubber, aromatic resin used, in order to achieve improved resin crosslinking toughening one performance (such as the purpose of toughness, temperature tolerance); Like many amine NN - dimethyl aromatic amine, the DMP - 10. DMP - 30 and triethanolamine as anhydride, or other types of crosslinking agent promoter to speed up the crosslinking reaction or increase the degree of crosslinking.

Fatty amine, refers to the length of carbon chain within the scope of the C8 C22 - the major types of organic amine compound, it is the same as general amine, primary amine, secondary amine and tertiary amine and polyamine four categories, and the primary, secondary, tertiary amine depends on the number of hydrogen atoms are replaced by alkyl of ammonia.

Aliphatic amine is ammonia organic derivatives, C8-10 short chain fatty amine has certain solubility in water, long chain aliphatic amine generally insoluble in water, room temperature is liquid or solid, is alkaline, as an organic alkali of the skin and mucous membranes with a stimulus and corrode action.

Is mainly composed of fatty alcohol and dimethylamine reaction single alkyl dimethyl tertiary amine, fatty alcohol and a methylamine reaction with alkyl methyl tertiary amines, fatty alcohols generated three alkyl tertiary amine and ammonia reaction.

First fatty acid and ammonia reaction to generate nitrile, fat fat fat hydrogenation generate nitrile primary amine or secondary amine, primary amine or secondary amine im hydrogenation of methyl tertiary amine, primary amine by nitrile ethylation after hydrogenation can generate diamine, further by cyanide diamine ethylation, hydrogenation can generate three amine, three amine further by nitrile ethylation, hydrogenation can generate tetramine.

Aromatic amine refers to have a sexual substituent aromatic amine - - NH2, NH - or nitrogen groups connected to an aromatic hydrocarbon, aromatic hydrocarbon structure usually contains one or more of the benzene ring. Aniline is the most simple example these compounds. Aromatic amine molecules high reactivity. Aromatic amine is commonly high boiling point of the low melting point of solid or liquid, has a special smell, bigger toxicity.




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


Structure in aromatic amine aniline, n are the lone electron to occupy on the SP2 hybrid orbitals, and benzene PI electron orbital overlap, the formation of nitrogen and benzene ring, conjugated PI molecular orbitals. The structure of aniline as shown.

Aromatic amine for high boiling point of the low melting point of solid or liquid, has a special smell, toxicity is very big, such as aniline can breathe, eat, or absorbed through the skin and cause poisoning, eating 0.25 mL severe poisoning. Beta - naphthylamine and benzidine is caused by malignant tumor.

Aromatic amine with amine alkali, alkaline is generally weak, can occur with the acid salt reaction, besides aromatic amine with some properties.

M-phenylene diamine production methods mainly manufactured dinitrobenzene between reduction method.
Benzene by the mixed acid nitration into rooms, neighborhood, on a mixture of dinitrobenzene, then through dinitrobenzene between sodium sulfite and liquid alkali refining, and then use iron powder reduction or hydrogenation reduction phenylenediamine was prepared.

1) iron powder reduction method: first of all in reaction kettle with stirrer, add iron powder and hydrochloric acid and heat activation. Add dinitrobenzene between reduction reaction, the temperature control in 98-102 ℃; End of reaction, and soda ash to PH value of 9, vacuum suction filter, the filtrate with hot water washing, the vacuum evaporation under the condition of 65 ℃ and 0.03 MPa. Pioneer water after steaming, distillation vacuum 0.09 0.05 MPa, when temperature is 170-180 ℃, get the product.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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