TH25813A - Aromatic production method Polycarbonate - Google Patents

Abstract

That was revealed is the method of producing aromatic Polycarbonate Which consists of bringing Enters the trans-esterification reaction in the polymerizer. With, at the very least, that material Can polymerize one It was selected from a mixture of fused monomers of aromatic dihydroxy and diaryl carbonate compounds and fused pre-polymers obtained from the mixtures as monomers. A polymer in which the liquid mass of the polymerized material is trans-esterified in poly Mercerizer has an exposed surface. And where the trans esterification reaction Of liquid mass Of polymerized material was performed under reaction conditions that satisfy the following formula (1) log (S / V) greater than or equal to 2 x 10-5 x - Mn. + 0.8 (1), where S represents the evaporation surface area (m 2), which is defined as the area (m 2) of the exposed surface of the liquid mass of the polymerized material, V instead. The volume (m 3) of the liquid mass of the polymerized material. In polymers and Mn represent the aromatic numerical mean molecular weight. Polycarbonate produced for comparison with already existing work methods. This method is commercially beneficial not only can be aromatic High quality polycarbonate with high heat resistance at the rate of High polymerization Without the occurrence of peeling colors Mixed up And product manufacturing That decomposes with only damaging heat But still does not have to use force to move A lot to stir And the production of polycarbonate can be easily expanded with ease.

Claims (5)

1. In a method for aromatic production Polycarbonate which contains conductivity Into the transesterification reaction In the polymerizer with at least one of the materials. That can be polymerized That were selected from the group that consisted of Fused monomer mixtures of aromatic, dihydroxy and diaryl carbonate compounds and fused pre-polymers obtained by a process consisting of a reaction agent. Aromatic dihydroxy and diaryl carbonate are assembled. Where the polymerized material is It exists as a liquid mass in a polymerizer and where the liquid mass of a material that can be polymerized. Trans-esther The fire in the polymer has a thick skin that opens. The modifications which carry out such trans-esterification of The liquid mass of such polymerized material. Is to act under the conditions of The reaction in such a way that it corresponds to the following formula (1) log (S / V) greater than or equal to 2 x 10-5 x Mn + 0.8 (1) where S represents the evaporation surface area (m 2), where Is defined as the area (m 2) of the exposed area (exposures) of the liquid mass of such polymerized material, V represents the volume (m 3) of the liquid mass of the polymeric material. The merization is obtained in the polymerizer and Mn represents the average molecular weight of aromatic numbers. Produced polycarbonate 2. Method according to claim 1, where the trans-esterification reaction of The liquid mass of the polymerized material. Was processed as a wet fall substance so that The liquid mass of the polymerized material. Will be made to fall along and come into contact with the surface of A solid object selected from a group consisting of the inner wall of the polymerizer and a guide that is defined in the polymerizer. 3. Clause 1 or 2 method where the volume V (m 3) of the liquid mass of the polymerized material is 5% or more with respect to the internal volume of the Such polymers 4. The only one claim 1 or 2 method in which the evaporated surface area S (m 2) of the liquid mass of the polymerized material is consistent with the formula ( 2) Here, S is greater than or equal to 0.03 O (2), where Q represents the rate (kg / hr) at which this rate can produce aromatic polycarbonate. 5. Method according to claim 4, where the rate Q (kg / hr), which can produce aromatic polycarbonate is 1 kg / hr or more.