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公开(公告)号：US3804813A
公开(公告)日：1974-04-16
申请号：US22816472
申请日：1972-02-22
Applicant: ALRAC CORP , MITSUBISHI CHEM IND
Inventor： TAKAMIYA T , HISAMOTO K , OHMURA Y , KURATA M , KIMURA T
Abstract: A CONTINUOUS PROCESS FOR POLYMERIZING LACTAMS COMPRISES POLYMERIZING THE LACTAM IN SHEET FORM, BREAKING UP THE SHEET INTO PELLETS OR PARTICLES, AND COMPLETING THE PROLYMERIZATION OF THE LACTAM IN THE PARTICLES.
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2.发明授权Polypyrrolidone fiber for activating sensor means in a humidity responsive device 失效用于在湿度响应装置中激活传感器的聚硅氧烷纤维
公开(公告)号：US3763338A
公开(公告)日：1973-10-02
申请号：US3763338D
申请日：1972-01-06
Applicant: ALRAC CORP
Inventor： TOZER J
CPC classification number: G01N19/10
Abstract: A device responsive to changes in humidity is provided in which at least one strand of polypyrrolidone fiber is disposed between a stanchion and spring means, changes in the humidity being detected by means responsive to contraction and expansion of the polypyrrolidone strand.
Abstract translation: 提供了响应于湿度变化的装置，其中至少一股聚吡咯烷酮纤维链设置在支柱和弹簧装置之间，通过响应于聚吡咯烷酮链的收缩和膨胀的方式来检测湿度的变化。
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公开(公告)号：US3806427A
公开(公告)日：1974-04-23
申请号：US26332072
申请日：1972-06-15
Applicant: ALRAC CORP
Inventor： GERVASI J , UPADHYAYA J
IPC: C07D201/16 , B01D3/10
CPC classification number: C07D201/16
Abstract: 2-PYRROLIDONE CAN BE PURIFIED THROUGH DISTILLATION FROM A MIXTURE OF IMPURE 2-PYRROLIDONE AND A BORON OXIDE DERIVATIVE.
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4.发明授权Polymerization of 2-pyrrolidone using a catalyst formed by reaction between 2-pyrrolidone and aqueous koh 失效使用2-吡咯烷酮与水性KOH之间的反应形成的催化剂的2-吡咯烷酮的聚合
公开(公告)号：US3778402A
公开(公告)日：1973-12-11
申请号：US3778402D
申请日：1971-12-27
Applicant: ALRAC CORP , MITSUBISHI CHEM IND
Inventor： WATANABE K , YOSHIMURA T , KOHYAMA K , KIMURA T , OHMURA Y
CPC classification number: C08G69/24
Abstract: 2-PYRROLIDONE IS POLYMERIZED USING POTASSIUM PYRROLIODONATED HAVING BEEN PREPARED BY REACTION BETWEEN 2PYRROLIDONE AND AN AQUEOUS SOLUTION OF KOH.
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