PA 410 which is obtained by the method and this method in order to manufacture PA 4X

摘要

1,4 diamino butane and being method in order to manufacture the polyamide PA 4X which includes the monomer unit of the aliphatic direct di-carboxylic acid X which at least possesses 8 carbon atoms, step below: 1) until step and 2 where it produces at the temperature to which this salt melts the aqueous solution which includes the salt of 1,4 diamino butane and aliphatic direct di-carboxylic acid,) the solution of this salt, the temperature which exceeds the crystallization temperature of the salt, by the pressure of maximum 7barA, moisture content ratio 0 - 30 weight % it becomes the gross of the solution as a standard step and 3 where it concentrates) being the step which makes the polymer form from the solution which is obtained with step 2, simultaneously with that, step and 4 where by pressure under 18barA the polymer is maintained in melted state) the polymer which is obtained with step 3 is decompressedBeing step, simultaneously with that, the method of including with the step which in order furthermore to make the polymer polymerize maintains the polymer in melted state. Regarding desirable execution form, aliphatic direct di-carboxylic acid is 1,10 Deccan two acids. The quantity of viscosity (VN) patent it claims also the polyamide 410 which at least is 100ml/gram.