公开(公告)号：US20240165577A1

公开(公告)日：2024-05-23

申请号：US18283943

申请日：2022-02-28

Applicant: ASAHI KASEI KABUSHIKI KAISHA

Inventor： Yusuke SHIGA ,  Nobutsugu NAMBA

IPC: B01J19/24 ,  B01J19/00 ,  B08B9/00 ,  C08G64/20

CPC classification number: B01J19/249 ,  B01J19/0006 ,  B01J19/2495 ,  B08B9/00 ,  C08G64/205 ,  B01J2219/00162 ,  B01J2219/1943 ,  B01J2219/2467 ,  B01J2219/247 ,  B01J2219/2485 ,  B01J2219/2492

Abstract: A method for assembling a polycarbonate manufacturing apparatus comprising a plurality of apparatus elements, the method comprising:



protecting an opening of each apparatus element, wherein the apparatus element is prepared as follows: at least a portion of a metal surface that comes into contact with an internal fluid of the apparatus element is polished with an abrasive corresponding to buff #400, and the polished metal surface is washed until becoming a state where no dirt is attached to a nonwoven fabric in a test of contact between the metal surface and the nonwoven fabric; and
connecting the opening of the apparatus element to the opening of another apparatus element within a dust cover.

公开(公告)号：US20240191021A1

公开(公告)日：2024-06-13

申请号：US18283364

申请日：2022-02-18

Applicant: ASAHI KASEI KABUSHIKI KAISHA

Inventor： Yusuke SHIGA ,  Nobutsugu NAMBA

IPC: C08G63/195 ,  B01D3/00 ,  B01D3/14 ,  B01J19/24 ,  C08G63/185

CPC classification number: C08G63/195 ,  B01D3/009 ,  B01D3/14 ,  B01J19/24 ,  C08G63/185 ,  B01J2204/002 ,  B01J2219/00065 ,  B01J2219/00128

Abstract: Provided is an aromatic branched polycarbonate having a predetermined repeat unit in a main chain and a branched chain, and having one or more kinds of predetermined branched structures in the main chain and the branched chain, wherein ratio of a total amount of substance of the branched structures to an amount of substance of the predetermined repeat unit is in a predetermined numeric range; and containing one or more kinds of predetermined oligomers, wherein a total mass of the oligomers is in a predetermined numeric range, and a ratio of an amount of substance of oligomers having a specific structure to a total amount of substance of the oligomers is in a predetermined numeric range.