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公开(公告)号：WO1994012702A1
公开(公告)日：1994-06-09
申请号：PCT/US1993011590
申请日：1993-11-30
Applicant: THE DOW CHEMICAL COMPANY
Inventor： THE DOW CHEMICAL COMPANY , ROSENBERG, Steven , QUARDERER, George, J., Jr. , SEN, Ashish , CHAU, Chieh-Chun , FALEY, Timothy, L. , SERRANO, Myrna , NAKAGAWA, Masaru , TERAMOTO, Yoshihiko
IPC: D01F06/74
CPC classification number: D01F6/74
Abstract: Polybenzazole polymer dopes are spun through a spinneret having more than 2 per cm of orifices in relatively close proximity. The dope filaments form and then pass through an air gap which has a temperature of at least 50 DEG C and at most 100 DEG C and a gas flow sufficient to uniformly reduce the temperature of the dope filaments. The filaments cool in the air gap and are then coagulated.
Abstract translation: 聚苯并恶唑聚合物掺合物通过喷丝板旋转，该喷丝头相对接近地具有大于2个/ cm 2的孔。 涂料长丝形成然后通过温度至少为50℃且至多为100℃的气隙，并且气流足以均匀地降低涂料丝的温度。 细丝在气隙中冷却，然后凝结。
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公开(公告)号：WO1993008156A1
公开(公告)日：1993-04-29
申请号：PCT/US1992007281
申请日：1992-08-27
Applicant: THE DOW CHEMICAL COMPANY
Inventor： THE DOW CHEMICAL COMPANY , ROSENBERG, Steven , KRAUSS, Richard, Carl , LIU, Ming-Biann , KLEISS, Luke, Randall
IPC: C07C215/80
CPC classification number: C07C323/34 , C07C215/80 , C08G73/22 , C08G75/32
Abstract: Salts that contain AA-PBZ monomer ions and BB-PBZ monomer ions is precipitated from an aqueous solution by contacting soluble salts of the monomers in an aqueous solution. The monomer salt is polymerized by ordinary techniques to form polybenzazole polymers without the need for devolatilization and with very accurate stoichiometric control.
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Patent Agency Ranking3.发明申请POLYBENZAZOLE FIBERS WITH ULTRA-HIGH PHYSICAL PROPERTIES AND METHOD FOR MAKING THEM 审中-公开具有超高物理性质的聚苯并噻唑纤维及其制备方法
公开(公告)号：WO1994012701A1
公开(公告)日：1994-06-09
申请号：PCT/US1993011589
申请日：1993-11-30
Applicant: THE DOW CHEMICAL COMPANY
Inventor： THE DOW CHEMICAL COMPANY , BUBECK, Robert, A. , CHAU, Chieh-Chun , NOLAN, Stephen, J. , ROSENBERG, Steven , NEWSHAM, Mark, D. , SERRANO, Myrna
IPC: D01F06/74
Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
Abstract translation: 给出了制造具有超高物理性能的PBZ纤维的方法。 通过本发明方法制备的聚苯并恶唑纤维的拉伸强度几乎比以前报道的值高两倍。
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4.发明公开PROCESS FOR MAKING CELLULOSE ETHERS HAVING REDUCED YELLOWING AND DISCOLORATION 有权用于生产纤维素醚具有降低VERGILBUNGSBLOCKER和染色
公开(公告)号：EP1194452A1
公开(公告)日：2002-04-10
申请号：EP00936349.0
申请日：2000-05-26
Applicant: THE DOW CHEMICAL COMPANY
Inventor： ROSENBERG, Steven , SPENCER, Michael, V. , SCHULZ, Gary, J.
Abstract: Disclosed is a process for making a low molecular weight cellulose ether. The process has the following steps: a) providing a high molecular weight cellulose ether of a viscosity of about 200 centipoise or more in a two percent aqueous solution at 20°C; b) contacting the high molecular weight cellulose ether with an amount of an acid sufficient to partially depolymerize it to a low molecular weight cellulose ether of a viscosity of about 100 cP or less at 20°C in a two percent aqueous solution; c) partially or substantially neutralizing the acid by contacting the low molecular weight cellulose ether with a basic compound; d) repeating steps a)-c) to produce two or more discrete product batches of low molecular weight cellulose ether and produce at least one discrete product batch which is partially neutralized; and e) blending the two or more discrete product batches to form a combined product batch of low molecular weight cellulose ether of a pH of 4 to 6.8. The process provides a cellulose ether with reduced yellowing and discoloration.
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5.发明公开POLYBENZAZOLE FIBERS WITH ULTRA-HIGH PHYSICAL PROPERTIES AND METHOD FOR MAKING THEM 失效随着对生产超高物理性质和吲哚的方法。
公开(公告)号：EP0672199A1
公开(公告)日：1995-09-20
申请号：EP94902466.0
申请日：1993-11-30
Applicant: THE DOW CHEMICAL COMPANY
Inventor： BUBECK, Robert, A. , CHAU, Chieh-Chun , NOLAN, Stephen, J. , ROSENBERG, Steven , NEWSHAM, Mark, D. , SERRANO, Myrna
Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
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公开(公告)号：EP0612311A1
公开(公告)日：1994-08-31
申请号：EP92919948.0
申请日：1992-08-27
Applicant: THE DOW CHEMICAL COMPANY
Inventor： ROSENBERG, Steven , KRAUSS, Richard, Carl , LIU, Ming-Biann , KLEISS, Luke, Randall
CPC classification number: C07C323/34 , C07C215/80 , C08G73/22 , C08G75/32
Abstract: On précipite des sels contenant des ions de monomères AA-PBZ et des ions de monomères BB-PBZ à partir d'une solution aqueuse, en mettant en contact les sels solubles des monomères dans une solution aqueuse. On polymérise les sels de monomères à l'aide de techniques classiques pour former des polymères de polybenzazole sans recourir à la dévolatilisation et avec une régulation stoichiométrique très précise.
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7.发明授权POLYBENZAZOLE FIBERS WITH ULTRA-HIGH PHYSICAL PROPERTIES AND METHOD FOR MAKING THEM 失效凭借超高高物理性能及其制造方法的聚吲哚
公开(公告)号：EP0672199B1
公开(公告)日：1997-07-09
申请号：EP94902466.5
申请日：1993-11-30
Applicant: THE DOW CHEMICAL COMPANY
Inventor： BUBECK, Robert, A. , CHAU, Chieh-Chun , NOLAN, Stephen, J. , ROSENBERG, Steven , NEWSHAM, Mark, D. , SERRANO, Myrna
IPC: D01F6/74
Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
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