| 1950 April | Nippon ZEON Co., Ltd. founded to manufacture and sell plastics with starting capital of 5 million yen. Head Office set up within Nippon Light Metal Co., Ltd. (7-3 Ginza Nishi, Chuo-ku, Tokyo). | |
| 1951 January | Technical assistance contract for the manufacture of polyvinyl chloride resins (PVC) concluded with BF Goodrich Chemicals Co. of the U.S.A. | |
| 1952 April | PVC production begins at Kanbara Plant (Shizuoka Prefecture). | |
| 1953 September | Technological Research Laboratory opens. | |
| 1956 November | PVC production begins at Takaoka Plant (Toyama Prefecture). | |
| 1959 July | Production of Japan's
first synthetic rubbers begins at Kawasaki Plant
(Kanagawa Prefecture). Central Research Laboratory opens. |
|
| 1961 September | Listed on the Tokyo Stock Exchange. Listed on the Osaka and Nagoya Stock Exchanges in October. | |
| 1965 June | Head Office moves to present location in Marunouchi, Chiyoda-ku, Tokyo. | |
| 1965 August | Butadiene and SBR production using the GPB Process (Nippon ZEON’s proprietary technology for extracting butadiene) begins at Tokuyama Plant (Yamaguchi Prefecture). | |
| 1967 March | Kanbara Plant closed. | |
| 1969 September | PVC production begins at Mizushima Plant (Okayama Prefecture). | |
| 1970 September | All stock of Nippon ZEON held by BF Goodrich Chemical Co. of the U.S.A. transferred to Japanese interest. | |
| 1971 November | English company name changed from "Geon" to "ZEON." | |
| 1971 November | GPI (ZEON's proprietary technology for extracting Isoprene) facility completed in Mizushima Plant and production of IR begin at the plant. | |
| 1973 August | Nippon ZEON of America, Inc. founded. | |
| 1973 August | C5 hydrocarbon resin production begins at Mizushima Plant. | |
| 1978 February | Production of NBR begins at Tokuyama Plant. | |
| 1980 April | Synthetic aromatic chemicals production begins at Mizushima Plant. | |
| 1982 July | Electronic materials business launched. | |
| 1984 April | Production of Zetpol hydrogenated NBR begins at Takaoka Plant. | |
| 1985 November | Entire company awarded Deming Prize for TQC. | |
| 1985 December | Production of Quintac thermoplastic elastomer SIS begins at Mizushima Plant. | |
| 1986 March | Production of polymerized toner begins at Kawasaki Plant. | |
| 1986 August | Solution-polymerized SBR production begins at Tokuyama Plant. | |
| 1989 March | Nitrile rubber operations of BP Chemical Ltd. in U.K. purchased. | |
| 1989 September | RIM products business launched. | |
| 1989 October | Specialty rubber business of BF Goodrich Chemicals Co. of the U.S.A. purchased. | |
| 1990 February | Company becomes first enterprise in the world to receive approval to manufacture ventricular-assist devices. | |
| 1990 October | A comprehensive medical equipment plant completed within the Takaoka Plant. | |
| 1990 November | ZEONEX (a cyclo-olefin polymer) plant completed within the Mizushima Plant. | |
| 1994 July | Environmental materials business launched in its entirety. | |
| 1994 October | Takaoka and Tokuyama Plants acquire ISO 9002 certification. Kawasaki and Mizushima Plants acquire it in 1995. | |
| 1994 October | Combined septic tank production facility completed at Mizushima Plant. | |
| 1995 July | Vinyl chloride business via transfer to Shin Dai-ichi Vinyl Corporation spun-off. | |
| 1998 June | Construction of C5 hydrocarbon resin plant of ZEON Chemicals (Thailand) Co., Ltd. completed. | |
| 1998 September | Sales of ZEONOR, COP, begin. | |
| 1998 November | Takaoka Plant acquires ISO 14001 certification. Tokuyama, Mizushima, and Kawasaki Plants acquire it in 1999. | |
| 1998 December | Production facility for ZEOROLA completed at Takaoka Plant. | |
| 1998 December | The U.S. DSM Copolymer's NBR business purchased. | |
| 1999 September | Special rubber business from the Goodyear Tire & Rubber Company of the U.S.A. purchased. | |
| 2000 March | Production of vinyl chloride resin at Mizushima Plant discontinued. Company withdraws from vinyl chloride business. | |
| 2000 July | Company logo changed and English company name changed to ZEON CORPORATION to mark the 50th anniversary. | |
| 2001 December | COP processing facility completed in Takaoka Plant. | |
| 2002 October | ZEONOR film, an LCD optical film, launched. | |
| 2003 August | RIMTEC Corporation, founded | |
| 2004 April | Construction of a polymerized color
toner plant begins. Construction of the facility for LCD diffusion plates made with cyclo-olefin polymer completed. |
|
| 2004 August | Construction of a new CMB factory completed in Guangzhou, China. | |
| 2004 October | A new low-dielectric constant inter-layer insulation film (Low-k) material was developed. | |
| 2004 November | COP production capacity improved to 15,000 tons. | |
| 2005 February | Construction of Precision Optics
Laboratory and ZeonorFilm® Complex No.5 at Takaoka Plant completed. ZEON CORPORATION to move Head Office. |
|
| 2005 October | ZEON CORPORATION constructs new manufacturing facility and launches sales of New Ether Solvent. | |
| 2006 May | ZEON CORPORATION announces completion of next-generation R&D building No.10. | |
| 2006 July | ZEON CORPORATION announces build a new plant in Himi City, Toyama Prefecture for ZeonorFilm® used in optical applications. | |
| 2007 August | ZEON receives from METI Minister's Prize of the second Monozukuri Nippon Grand Award for Optical Films. | |
| 2007 September | New facility for optical films constructed in Himi city, Toyama. | |
| 2008 June | ZEON CORPORATION completes construction of Intergrated Product Center(IPC) at Mizushima Plant. | |
| 2009 January | ZEON CORPORATION absorps Optes Inc,. | |
| 2010 December | ZEON Chemicals Singapore Pte. Ltd.founded. | |
| 2011 February | ZEON KOREA CO.,LTD.founded. |
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