Manufacturing method for high molecular weight aromatic polycarbonate resin

Patent metadata

Field	Value
Publication number	US-2019092901-A1
Application number	US-201716088959-A
Country	US
Kind code	A1
Filing date	Mar 24, 2017
Priority date	Mar 30, 2016
Publication date	Mar 28, 2019
Grant date	—

Abstract

Provided is a high molecular weight aromatic polycarbonate resin manufacturing method that suppresses the occurrence of heterogeneous structures and can achieve a sufficiently high molecular weight. A high molecular weight aromatic polycarbonate resin manufacturing method including: a step in which a dialcohol compound expressed by general formula (1) and a catalyst are mixed to obtain a catalyst composition; a step in which the obtained catalyst composition is transferred to a prepolymer mixing tank via a transfer pipe, with a transfer period of 10 hours or less; a step in which the transferred catalyst composition and an aromatic polycarbonate prepolymer are mixed in the prepolymer mixing tank to obtain a prepolymer mixture; and a high molecular weight achievement step in which the obtained prepolymer mixture is heat-treated under reduced pressure conditions to obtain a high molecular weight aromatic polycarbonate resin.

First claim

1 . A manufacturing method for a high molecular weight aromatic polycarbonate resin, the method comprising:
a step of mixing a dialcohol compound represented by General Formula (1) below and a catalyst to produce a catalyst composition, a step of transferring the produced catalyst composition to a prepolymer mixing tank via a transfer tube, within a transfer period of 10 hours or less, a step of mixing the transferred catalyst composition and an aromatic polycarbonate prepolymer in the prepolymer mixing tank to obtain a prepolymer mixture, and a high molecular weight achievement step of heat-treating the obtained prepolymer mixture under reduced pressure conditions to obtain a high molecular weight aromatic polycarbonate resin;

wherein, R 1 to R 4 each independently represent a hydrogen atom, a halogen atom, or a linear or branched alkyl group having 1 to 5 carbons, and Q represents a single bond or a substituted or unsubstituted divalent group comprising at least one member selected from the group consisting of an aliphatic group, an aromatic group, an oxygen atom, a sulfur atom, a sulfone group, a sulfoxide group, a carbonyl group, a dialkylsilyl group and a diarylsilyl group.

2 . The manufacturing method according to claim 1 , wherein the step of producing the catalyst composition is performed in a catalyst composition preparation tank.

3 . The manufacturing method according to claim 1 , wherein the catalyst composition is transferred in a temperature range from a temperature that is 5° C. higher than a melting point of the dialcohol compound to a temperature that is 250° C. higher than the melting point.

4 . The manufacturing method according to claim 1 , wherein the transfer tube has a surface in contact with the catalyst composition, and the surface has an iron content of 80 mass % or less.

5 . The manufacturing method according to claim 1 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

6 . The manufacturing method according to claim 2 , wherein the catalyst composition is transferred in a temperature range from a temperature that is 5° C. higher than a melting point of the dialcohol compound to a temperature that is 250° C. higher than the melting point.

7 . The manufacturing method according to claim 2 , wherein the transfer tube has a surface in contact with the catalyst composition, and the surface has an iron content of 80 mass % or less.

8 . The manufacturing method according to claim 2 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

9 . The manufacturing method according to claim 3 , wherein the transfer tube has a surface in contact with the catalyst composition, and the surface has an iron content of 80 mass % or less.

10 . The manufacturing method according to claim 3 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

11 . The manufacturing method according to claim 4 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

12 . The manufacturing method according to claim 6 , wherein the transfer tube has a surface in contact with the catalyst composition, and the surface has an iron content of 80 mass % or less.

13 . The manufacturing method according to claim 6 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

14 . The manufacturing method according to claim 7 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

15 . The manufacturing method according to claim 9 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

16 . The manufacturing method according to claim 12 , wherein the catalyst is at least one member selected from the group consisting of alkali metal salts and alkaline earth metal salts.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Isahaya Yoshinori
• Hirashima Atsushi
• Harada Hidefumi
• Ito Maki
• HAYAKAWA Jun-ya
• Isobe Takehiko
• Shinkai Yousuke
• Shimokawa Keisuke

Classifications

• C08G64/04

  Aromatic polycarbonates · CPC title

• C08G64/305 Primary

  and alcohols · CPC title

• C08G64/06

  not containing aliphatic unsaturation · CPC title

• C08G64/1608

  saturated · CPC title