公开(公告)号：US3629180A

公开(公告)日：1971-12-21

申请号：US3629180D

申请日：1969-01-23

Applicant: TORAY INDUSTRIES

Inventor： YODA NAOYA ,  KURIHARA MASARU ,  DOGOSHI NORIAKI ,  NAKANISHI RYOJI ,  YUMOTO HIROSUKE ,  ITOGA MASAAKI ,  MOCHIZUKI HIROSHI ,  YOSHII TOSHIYA ,  FUJITA SABURO

IPC: C08G73/10 ,  C08G51/50

CPC classification number: C08G73/1007

Abstract: A PROCESS FOR PRODUCING SHAPABLE POLYMERIC COMPOSITIONS HAVING IMPROVED MECHANICAL PROPERTIES IS DESCRIBED WHICH INVOLVES THE HEATING OF A POLYMER CONTAINING POLYAMIDE-ACID RECURRING UNITS IN AN ORGANIC POLYMERIZATION SOLVENT, WHICH SOLVENT ALSO CONTAINS AN AMOUNT OF A PHOSPHOROUS COMPOUND IN THE RANGE OF FROM ABOUT .01% BY WEIGHT TO ABOUT 30% BY WEIGHT UNTIL IMIDE RING CLOSURE IS EFFECTED.

公开(公告)号：DE1902875A1

公开(公告)日：1970-08-06

申请号：DE1902875

申请日：1969-01-22

Applicant: TORAY INDUSTRIES

Inventor： YODA NAOYO ,  KURIHARA MASARU ,  DOGOSHI NORIAKI ,  NAKANISHI RYOJI ,  KAMAKURA KANAGAWA ,  YUMOTO HIROSUKE ,  ITOGA MASAAKI ,  YOSHII TOSHIYA ,  FUJITA SABURO ,  MOCHIZUKI HIROSHI

IPC: C08G73/10 ,  C08G20/00

Abstract: 1,260,742. Polyimide films. TORAY INDUSTRIES Inc. 23 Jan., 1969 [23 Jan., 1968; 27 May, 1968; 28 May, 1968], No. 3906/69. Heading B5B. [Also in Division C3] A composition comprises (i) a polyimide precursor obtained by reacting a diamine with an aromatic dianhydride having a group cyclizable to form part of an oxazole, thiazole, oxazinone or imidazole ring and (ii) 0À01 to 30 wt. per cent of phosphoric, phosphorous or hypophosphorous acid or an ester thereof in (iii) an organic solvent. The preparation and cyclization of precursors (i) is described and claimed in Specification 1,237,004. Extensive lists of all three ingredients are given. The compositions may be converted to shaped articles prior to or simultaneously with heating to effect cyclization; the presence of (ii) is stated to lower the temperature required, e.g. by 50‹ C. In examples compositions having N-methyl-2- pyrrolidone or dimethyl acetamide as solvent were cast on to glass or steel plates or a chromium-plated drum, spread with a doctor blade, dried in air at 120-128‹ C. and peeled from the casting surface. Films of Examples (1) and (2) were further heat treated in vacuo at 330‹ C. or in air at 370‹ C.

公开(公告)号：JPS58644B2

公开(公告)日：1983-01-07

申请号：JP8324774

申请日：1974-07-22

Applicant: TORAY INDUSTRIES

Inventor： DOGOSHI NORIAKI ,  FUJIMOTO HIDEKI ,  ITOGA MASAAKI

IPC: H01B7/02 ,  H01B3/30 ,  H01B13/16