US Patent No: 5,462,995

Number of patents in Portfolio can not be more than 2000

Hydrogenated products of thermoplastic norbornene polymers, their production, substrates for optical elements obtained by molding them, optical elements and lenses

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Abstract

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The present invention provides the hydrogenated product of a thermoplastic norbornene polymer excellent in characteristics as optical materials by reducing the residual amounts of the transition metal atoms originating from the polymerization catalyst used at the polymerization to 1 ppm or less of the hydrogenated product. Reduction of the residual amounts to below the desired level is attained by treating the reaction solution with the adsorbent during or after production of the hydrogenated product from the thermoplastic norbornene polymer. The hydrogenated product of the thermoplastic norbornene polymer thus obtained in which the residual amounts of the transition metal atoms are 1 ppm or less, has a wide utilization field, including a material for optical articles having excellent utilization characteristics such as substrates for optical elements, lenses and the like.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIPPON ZEON CO., LTD.TOKYO158

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hosaka, Tohru Kanagawa, JP 7 133
Kohara, Teiji Kawasaki, JP 46 475
Koushima, Yuji Yokohama, JP 3 48
Mizuno, Hideharu Kawasaki, JP 2 84
Natsuume, Tadao Yokosuka, JP 44 497

Cited Art Landscape

Patent Info (Count) # Cites Year
 
JSR CORPORATION (2)
* 5,053,471 Transparent resin material 14 1990
* 5,202,388 Process for producing hydrogenation product of ring-opening polymer 6 1991
 
Nippon Zeon Co., Ltd. (2)
* 5,276,098 Thermoplastic saturated norbornene group polymer composition 6 1992
* 5,334,424 Thermoplastic norbornene resin formed articles and sustrates for liquid crystal display 23 1992
 
MITSUI CHEMICALS, INC. (1)
* 5,290,877 Information recording medium and adhesive composition therefor 7 1992
 
Montedipe (1)
* 5,240,998 Thermoplastic compositions based on a vinyl aromatic co-polymer and a polyamide resin 2 1990
 
SUMITOMO BAKELITE CO., LTD. (1)
* 5,115,041 Substrate for optical recording media and molding composition therefor 8 1989
 
TDK CORPORATION (1)
* 5,244,706 Optical recording disk 10 1992
 
Other [Check patent profile for assignment information] (1)
* 4,876,525 Emergency warning brake system 11 1988
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY (13)
8,535,514 High viscosity metallocene catalyst PAO novel base stock lubricant blends 0 2007
8,394,746 Low sulfur and low metal additive formulations for high performance industrial oils 0 2009
8,476,205 Chromium HVI-PAO bi-modal lubricant compositions 2 2009
8,247,358 HVI-PAO bi-modal lubricant compositions 3 2009
8,716,201 Alkylated naphtylene base stock lubricant formulations 0 2010
8,501,675 High viscosity novel base stock lubricant viscosity blends 0 2010
8,299,007 Base stock lubricant blends 5 2010
8,759,267 Method for improving the fuel efficiency of engine oil compositions for large low and medium speed engines by reducing the traction coefficient 0 2011
8,748,362 Method for improving the fuel efficiency of engine oil compositions for large low and medium speed gas engines by reducing the traction coefficient 0 2011
8,728,999 Method for improving the fuel efficiency of engine oil compositions for large low and medium speed engines by reducing the traction coefficient 0 2011
8,642,523 Method for improving the fuel efficiency of engine oil compositions for large low and medium speed engines by reducing the traction coefficient 0 2011
8,598,103 Method for improving the fuel efficiency of engine oil compositions for large low, medium and high speed engines by reducing the traction coefficient 0 2011
8,834,705 Gear oil compositions 0 2012
 
GEORGIA TECH RESEARCH CORPORATION (8)
7,132,736 Devices having compliant wafer-level packages with pillars and methods of fabrication 1 2002
7,135,777 Devices having compliant wafer-level input/output interconnections and packages using pillars and methods of fabrication thereof 40 2003
7,099,525 Dual-mode/function optical and electrical interconnects, methods of fabrication thereof, and methods of use thereof 5 2003
7,283,695 Optical interconnects in microelectronics based on azimuthally asymmetric long-period fiber grating couplers 5 2005
7,266,267 Microfluidic, optical, and electrical input output interconnects, methods of fabrication thereof, and methods of use thereof 3 2005
7,518,737 Displacement-measuring optical device with orifice 5 2006
7,440,117 Highly-sensitive displacement-measuring optical device 7 2006
7,468,558 Devices having compliant wafer-level input/output interconnections and packages using pillars and methods of fabrication thereof 1 2006
 
EXXONMOBIL CHEMICAL PATENTS INC. (7)
8,748,361 Polyalpha-olefin compositions and processes to produce the same 0 2006
8,207,390 Process to produce low viscosity poly-alpha-olefins 2 2006
7,989,670 Process to produce high viscosity fluids 1 2007
8,071,835 Process to produce polyolefins using metallocene catalysts 0 2007
8,513,478 Process to produce polyalphaolefins 0 2007
8,865,959 Process for synthetic lubricant production 0 2009
8,530,712 Process for producing novel synthetic basestocks 0 2010
 
NETBIO, INC. (2)
8,425,861 Methods for rapid multiplexed amplification of target nucleic acids 0 2008
8,018,593 Integrated nucleic acid analysis 14 2008
 
Nippon Zeon Co., Ltd. (2)
6,277,923 Cycloolefin-based polymer and process for producing the same 0 1997
6,310,160 Norbornene polymer and process for preparing the same 9 1999
 
TEIJIN LIMITED (2)
* 6,232,407 Process for producing hydrogenated .alpha.-olefin-dicyclopentadiene copolymer, method for molding the same and optical material 6 1999
6,476,153 Process for producing hydrogenated .alpha.-olefin-dicyclopentadiene copolymer, method for molding the same and optical material 1 2001
 
DAIKYO SEIKO, LTD. (1)
8,563,107 Container for medical products 0 2010
 
MITSUI CHEMICALS, INC. (1)
* 6,197,894 Preparation of hydrogenated product of cyclic olefin ring-opening metathesis polymer 21 1998
* Cited By Examiner