Coating by using coupling agent phase wet sex

Coating by using coupling agent phase wet sex,Multiple primary amine and epoxy crosslinking, therefore can be used as a stage of wet sex agent. The dissociation ketone was evaporate. Request ketone with good volatile. Coating thickness should not be more than 200 PM. Otherwise. Ketimine dissociation is difficult, the inner crosslinking incomplete. Coating of the inner ketone less volatile. Affected by outer resin crosslinking content package, crosslinking performance.

After replaced by alkyl amine is ammonia hydrogen atoms of organic compounds. Ammonia in one, two, or three hydrogen atoms are replaced by alkyl compounds generated, respectively called first amine, primary amine, second amine (secondary amine) and the amine (tertiary amine). Their general formula is: RNH2 - primary amine, R2NH - secondary amine, R3N - tertiary amine. Amines are widely exist in nature, have very important physiological functions. As a result, most of the drugs contain amine functional group - amino. Many proteins, nucleic acids, hormones, antibiotics and alkaloid, contain amino, is amine complex derivatives.

Primary amine and nitrite generation diazo reaction process (hereinafter referred to as diazonium salt). Nitrite is usually with sodium nitrite and inorganic acid in situ generated in the reaction liquid. Diazotization expressed by the following general formula:

Type in the Ar aryl; X said acid radical.

Diazonium salt soluble in water, commonly in the water can ionization, the formula can be written as:

NH, NH is a compound of nitrogen and hydrogen, ammonia formula for NH, molecular structure of triangular in cone, the nitrogen atom has a pair of lone pair electrons. Ammonia is a colorless, smelly gas, soluble in water. Ammonia can exist alone.

After replaced by alkyl amine is ammonia hydrogen atoms of organic compounds. Ammonia in one, two, or three hydrogen atoms are replaced by alkyl compounds generated, respectively called first amine, primary amine, second amine (secondary amine) and the amine (tertiary amine).

Their general formula is: RNH2 - primary amine, R2NH - secondary amine, R3N - tertiary amine. Amines are widely exist in nature, have very important physiological functions.

As a result, most of the drugs contain amine functional group - amino. Many proteins, nucleic acids, hormones, antibiotics and alkaloid, contain amino, is amine complex derivatives.




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


Industrial methylamine with methanol and ammonia on the flux at high temperature is not equipped with activated alumina catalyst converter for synthesis of regularly, but the methylation reaction does not stop at a stage of methylamine, so get a mixture of methylamine, dimethylamine and trimethylamine.

Control the proportion of methanol and ammonia, ammonia, and add water and circulating trimethylamine is helpful to generate a methylamine and dimethylamine, when the amount of ammonia is 2.5 times that of methanol reaction temperature is 425 ℃, reaction pressure is 2.45 MPa, can obtain a 10-12% methylamine, dimethylamine 8-9%, trimethylamine 11-13% mixed amine.

Because under ordinary conditions of trimethylamine with ammonia and other form azeotrope methylamine, so the reaction products by adopting the combination of pressure rectification and extractive distillation separation method. To produce 1 t mixed methylamine calculation, need to consume 1500 kg, 500 kg of liquid ammonia methanol. According to literatures, the change ratio of methanol and ammonia is one of the effective methods to get hope products, methanol and ammonia in the proportion of 1:1. 5 is to generate the best condition of trimethylamine, and the proportion of methanol and ammonia as 1:4 when is to generate a methylamine in the best condition.

Primary amine and nitrite generation diazo reaction process (hereinafter referred to as diazonium salt).

Nitrite is usually with sodium nitrite and inorganic acid in situ generated in the reaction liquid.

Diazonium salt soluble in water, commonly can ionization in the water, its structural formula can be written as: NH3 and NH4 +
Ammonia is a compound of nitrogen and hydrogen, formula for NH3, molecular structure of triangle cone, electronic, including nitrogen atom has a pair of lone pair electrons. Ammonia is a colorless, smelly gas, soluble in water. Ammonia can exist alone.

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