公开(公告)号：US06858701B2

公开(公告)日：2005-02-22

申请号：US10297082

申请日：2001-05-31

申请人： Hiroshi Sakurai ,  Toyoaki Ishiwata ,  Takanori Miyoshi ,  Shunichi Matsumura

发明人： Hiroshi Sakurai ,  Toyoaki Ishiwata ,  Takanori Miyoshi ,  Shunichi Matsumura

IPC分类号： C08G63/64 ,  C08G63/00

CPC分类号： C08G63/64

摘要： A wholly aromatic polyester carbonate having a good color and excellent heat resistant stability. This polymer had an extremely low alkali metal content of 10 ppm or less. This polymer is advantageously produced by reacting an aromatic dicarboxylic acid, aromatic diol and diaryl carbonate in a specific molar ratio in the presence of a pyridine-based compound as a catalyst.

摘要翻译： 具有良好的颜色和优异的耐热稳定性的全芳族聚酯碳酸酯。 该聚合物的碱金属含量极低，为10ppm以下。 通过在作为催化剂的吡啶类化合物存在下，通过使芳族二羧酸，芳族二醇和碳酸二芳基酯以特定的摩尔比进行反应来制备该聚合物。

公开(公告)号：US06696541B1

公开(公告)日：2004-02-24

申请号：US10088590

申请日：2002-03-21

申请人： Tomonori Sakurai ,  Nobuaki Kido ,  Shunichi Matsumura ,  Toyoaki Ishiwata ,  Kazuteru Kohno ,  Hirotaka Suzuki ,  Hironori Haga ,  Toru Hikosaka

发明人： Tomonori Sakurai ,  Nobuaki Kido ,  Shunichi Matsumura ,  Toyoaki Ishiwata ,  Kazuteru Kohno ,  Hirotaka Suzuki ,  Hironori Haga ,  Toru Hikosaka

IPC分类号： C08G6400

CPC分类号： C08G64/20 ,  C08G64/40

摘要： A method for crystallizing a low molecular weight aromatic polycarbonate effectively and a method for preparing a polycarbonate resin having a desired intrinsic viscosity by using the polycarbonate crystallized with the above method of crystallization. A low molecular weight aromatic polycarbonate (preferably, the one produced by melt polycondensation) is crystallized by bringing it into contact with an aromatic monohydroxy compound or a mixture of said compound and water. Or, a low molecular weight aromatic polycarbonate is melt mixed with at least one or more kinds of compounds selected from the group consisting of aromatic monohydroxy compounds, carbonic acid diester compounds and aromatic dihydroxy compounds to crystallize the low molecular weight aromatic polycarbonate. The crystallized product is heated at a temperature lower than its melting point under reduced pressure or in an inert gas flow to convert it into a high polymerized state. Thus, a polycarbonate resin having a desired intrinsic viscosity is prepared.

摘要翻译： 一种低分子量芳族聚碳酸酯的有效结晶方法以及通过使用通过上述结晶方法结晶的聚碳酸酯制备具有所需特性粘度的聚碳酸酯树脂的方法。低分子量芳族聚碳酸酯（优选通过熔体 缩聚）通过使其与芳族单羟基化合物或所述化合物和水的混合物接触而结晶。 或者，将低分子量芳族聚碳酸酯与至少一种选自芳族单羟基化合物，碳酸二酯化合物和芳族二羟基化合物的化合物熔融混合，以使低分子量芳族聚碳酸酯结晶。 将结晶产物在低于其熔点的温度下在减压或惰性气体流中加热以将其转化为高聚合状态。 因此，制备具有所需特性粘度的聚碳酸酯树脂。

公开(公告)号：US06596839B2

公开(公告)日：2003-07-22

申请号：US10169671

申请日：2002-07-08

申请人： Takanori Miyoshi ,  Hiroshi Sakurai ,  Toyoaki Ishiwata ,  Shunichi Matsumura

发明人： Takanori Miyoshi ,  Hiroshi Sakurai ,  Toyoaki Ishiwata ,  Shunichi Matsumura

IPC分类号： C08G6300

CPC分类号： C08G63/64 ,  C08G63/82 ,  C08G63/83 ,  C08G63/85 ,  C08G63/87

摘要： A process for producing a wholly aromatic polyester which is excellent in heat resistance, mechanical properties and yet color and has a high degree of polymerization by melt polymerizing a dicarboxylic acid and a diol directly on an industrial scale at a low cost in a short period of time without esterifying the dicarboxylic acid or diol in advance. To produce the wholly aromatic polyester by reacting and molding an aromatic dicarboxylic acid such as terephthalic acid, an aromatic diol such as 2,2-bis(4-hydroxyphenyl)propane and a diaryl carbonate by heating, a combination of a specific pyridine compound and an alkali metal (bi)carbonate, a combination of a specific pyridine compound and an organic tin compound or a specific titanium compound is existent as a catalyst. Thereby, the wholly aromatic polyester having the above properties is obtained.

摘要翻译： 一种全芳香族聚酯的制造方法，其具有优异的耐热性，机械性能和颜色，并且通过在短时间内以低成本在工业规模上直接熔融聚合二羧酸和二醇具有高聚合度 预先不二羧酸或二醇酯化。 为了通过加热芳族二羧酸如对苯二甲酸，2,2-双（4-羟基苯基）丙烷等芳香族二醇和碳酸二芳基酯反应而成型，可以将特定的吡啶化合物和 存在碱金属（bi）碳酸盐，特定吡啶化合物和有机锡化合物或特定钛化合物的组合作为催化剂。 由此，得到具有上述特性的全芳香族聚酯。