A kind of production technology of polym-phenylene isophthalamide polymer
A polym-phenylene isophthalamide, production process technology, applied in the production process field of poly-m-phenylene isophthalamide polymer, can solve the problem of increasing the complexity and processing difficulty of subsequent processes, increasing the colloid Difficulty of filtration, inaccurate control and other problems, to reduce the difficulty of colloid filtration and processing difficulties, easy control of efficiency and end point, and excellent neutralization quality
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Embodiment 1
[0023] A kind of production technique of polym-phenylene isophthalamide polymer, comprises the following steps,
[0024] In the diamine dissolving step, the m-phenylenediamine is added to the amide polar organic solvent at a temperature of 20-60° C., and the m-phenylenediamine is dissolved in the amide polar organic solvent; in a preferred embodiment, m-phenylene The diamine is selected from polymer grade m-phenylenediamine, and the amide polar organic solvent is selected from dimethylacetamide solution, and the dimethylacetamide solution made from 6 to 8 parts of weight of dry dimethylacetamide is mixed with 1 Parts by weight of polymeric grade m-phenylenediamine are added to the dimethylacetamide solution, and the temperature of the solution is controlled at 20-30°C;
[0025] In the normal temperature polymerization step, the temperature of the solution obtained in the diamine dissolving step is controlled at 20-40°C, and isophthaloyl chloride is added under the reaction con...
Embodiment 2
[0032] A kind of specific production technique of polym-phenylene isophthalamide polymer, comprises the following steps,
[0033] In the diamine dissolving step, m-phenylenediamine is selected from polymer grade m-phenylenediamine, amide polar organic solvent is selected from dimethylacetamide solution, and dimethylacetamide made from 7.8 parts by weight of dry dimethylacetamide Acetamide solution, adding 1 part by weight of polymer-grade m-phenylenediamine to the dimethylacetamide solution, and controlling the temperature of the solution at 20-30°C;
[0034] In the normal temperature polymerization step, continuously and slowly the polymerization grade isophthaloyl dichloride of 1.88 parts by weight;
[0035]In the rough control neutralization reaction step, corresponding to 1 part by weight of m-phenylenediamine in the diamine dissolution step, 0.65 parts by weight of alkaline earth metal oxide or hydroxide is added, and in a preferred embodiment, corresponding to diamine 1...
Embodiment 3
[0039] A kind of specific production technique of polym-phenylene isophthalamide polymer, comprises the following steps,
[0040] In a stirred and jacketed tank reactor, add 1 part by weight of polymer-grade m-phenylenediamine to 7.8 parts by weight of dry dimethylacetamide, control the temperature at 20-30 °C, and continuously Slowly add 1.88 parts by weight of polymeric isophthaloyl chloride for polymerization, and the hydrogen chloride generated is continuously neutralized with 0.65 parts by weight of calcium hydroxide dimethylacetamide solution, wherein calcium hydroxide and dimethyl The weight ratio of acetamide is 1:2, the temperature is controlled below 70°C, and then 0.07 parts by weight of diethylamine-dimethylacetamide solution is used for continuous neutralization reaction. The weight ratio of diethylamine and dimethylacetamide The ratio is 1:2, and the resulting colloidal polymer of polyisophthaloyl dichloride m-phenylenediamine has the concentration of the polymer...
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