The present invention provides an aromatic polycarbonate resin composition having a high molecular weight and less amount of a heterologous structure, retaining good qualities, and excellent in thermal stability, and an improved preparation process thereof.
PRODUCTION METHOD FOR AROMATIC POLYCARBONATE RESIN HAVING INCREASED MOLECULAR WEIGHT
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP2921514A1
公开(公告)日:2015-09-23
The present invention is to provide a process for preparing a highly polymerized aromatic polycarbonate resin, which comprises the steps of a highly polymerizing step for reacting an aromatic polycarbonate prepolymer and an aliphatic diol compound in the presence of a transesterification catalyst to obtain a highly polymerized aromatic polycarbonate resin, a cyclic carbonate removal step for removing at least part of the cyclic carbonate by-produced in the above highly polymerizing step out of the reaction system, and a recycle step of hydrolyzing the cyclic carbonate removed in the cyclic carbonate removal step to obtain an aliphatic diol compound and using the obtained aliphatic diol compound as at least a part of the aliphatic diol compound to be used in the highly polymerizing step.
METHOD FOR PRODUCING HIGH-MOLECULAR-WEIGHT AROMATIC POLYCARBONATE RESIN
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3070112A1
公开(公告)日:2016-09-21
The present invention is to provide a process for producing a high molecular-weight aromatic polycarbonate resin, the process includes mixing a dialcohol compound represented by the following Formula (1) with a first catalyst to obtain a catalyst composition; mixing the obtained catalyst composition with an aromatic polycarbonate prepolymer to obtain a prepolymer mixture; and obtaining a high molecular-weight aromatic polycarbonate by subjecting the obtained prepolymer mixture to heating treatment under reduced pressure condition. In the Formula (1), R1 to R4 each independently represent a hydrogen atom, an alkyl group and the like. Q represents a divalent group or a single bond.
POLYCARBONATE, POLYURETHANE, ELASTOMER, METHOD FOR PRODUCING POLYCARBONATE, AND METHOD FOR PRODUCING POLYURETHANE
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3165552A1
公开(公告)日:2017-05-10
Provided is a polycarbonates that can be used as starting materials for polyurethanes having excellent weather resistance and heat aging resistance. Provided is polyurethanes and elastomers obtained by using the polycarbonates, as well as processes for manufacturing the polycarbonates and processes for manufacturing the polyurethanes. The polycarbonate contains one or more types of repeating unit represented by formula [I] below, which contains 90% or more of terminal hydroxyl groups; wherein R1, R2, R3 and R4 each independently represent an aliphatic hydrocarbon group containing 1 to 6 carbon atoms.
AROMATIC POLYCARBONATE RESIN COMPOSITION AND AROMATIC POLYCARBONATE RESIN MANUFACTURING METHOD
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3438202A1
公开(公告)日:2019-02-06
Provided is an aromatic polycarbonate resin composition with high fluidity, particularly during low shear, and a good color. An aromatic polycarbonate resin composition including: an aromatic polycarbonate resin that has a structural unit expressed by general formula (1); a aliphatic cyclic carbonate that is expressed by general formula (2) and is included at a ratio of 10ppm-10,000ppm; an aromatic cyclic carbonate that is expressed by general formula (3); and at least one compound selected from the group consisting of compounds expressed by general formulas (4)-(6), wherein the total content of the aromatic cyclic carbonate and the compound(s) expressed by general formula(s) (4)-(6) is 0.1mass%-2.0mass% by bisphenol A-converted value.