公开(公告)号：US3660527A

公开(公告)日：1972-05-02

申请号：US3660527D

申请日：1970-06-15

Applicant: TORAY INDUSTRIES

Inventor： SAKAI HIROSHI ,  IZUMI ZENZI ,  KITAGAWA HIDEJI ,  HOSHINA MASAKUNI ,  HAMADA SATOSI

IPC: C08F20/44 ,  C08F3/76 ,  C08F15/22

CPC classification number: C08F20/44 ,  C08F2/36

Abstract: A METHOD WHEREIN, CARRYING OUT THE SOLUTION POLYMERIZATION OF EITHER ACRYLONITRILE SINGLY OR A MIXTURE CONSISTING OF AT LEAST 70 MOL PERCENT THEREOF AND AT LEAST ONE POLYMERIZABLE VINYL COMPOUND, IN A POLYMERIZATION SOLVENT CONSISTING PREDOMINANTLY OF A DIALKYL SULFOXIDE, USING A POLYMERIZATION INITIATOR OF THE AZO COMPOUND TYPE, THE POLYMERIZATION IS EFFECTED IN THE PRESENCE, AS A DISCOLORATION INHIBITOR, OF AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF THE INORGANIC ACID SALTS AND ORGANIC ACID SALTS OF BETA-HYDROXYETHYLHYDRAZINE AND BETACYANOETHYLHYDRAZINE. THESE DISCOLORATION INHIBITORS NOT ONLY DEMONSTRATE A SATISFACTORY DISCOLORATION PREVENTIVE EFFECT BUT ALSO BRING ABOUT AN IMPROVEMENT IN THE POLYMERIZATION SPEED AND DEGREE OF POLYMERIZATION OF THE RESULTING POLYMER.

公开(公告)号：CA943298A

公开(公告)日：1974-03-05

申请号：CA120551

申请日：1971-08-13

Applicant: TORAY INDUSTRIES

Inventor： KITAGAWA HIDEJI ,  MUKOYAMA EIJI ,  SUZUKI ZENNOSUKE ,  KATO TADASHI ,  HOSAKA SHUNTARO ,  SAKAI HIROSHI ,  YAMANAKA YOSHIO ,  IZUMI ZENJI ,  HAMADA SATOSI ,  ITO ISAO

IPC: C08F2/22 ,  C08F220/44

公开(公告)号：DE2814665C2

公开(公告)日：1994-05-05

申请号：DE2814665

申请日：1978-04-05

Applicant: TORAY INDUSTRIES

Inventor： HIRAMATSU TORU ,  KOSEKI TERUO ,  HAMADA SATOSI ,  SUMIDA ATSUSHI

IPC: D01F9/22

公开(公告)号：DE2814665A1

公开(公告)日：1978-10-12

申请号：DE2814665

申请日：1978-04-05

Applicant: TORAY INDUSTRIES

Inventor： HIRAMATSU TORU ,  KOSEKI TERUO ,  HAMADA SATOSI ,  SUMIDA ATSUSHI

IPC: D01F9/22 ,  D01F9/20