US Patent No: 4,182,821

Number of patents in Portfolio can not be more than 2000

Method for producing a lead containing monomer composition and a radiation shielding polymer

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Abstract

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A method for producing a lead containing monomer composition comprising reacting a mixture comprising (1) at least one monomer selected from the group consisting of alkyl methacrylate having 1-4 carbon atoms in an alkyl group, hydroxyalkyl acrylate, hydroxyalkyl methacrylate and styrene, (2) acrylic or methacrylic acid, (3) an organic acid having the general formula: R.sub.1 COOH, wherein R.sub.1 is hydrocarbon residue having 5-20 carbon atoms and optionally (4) an organic acid having the general formula: R.sub.2 COOH, wherein R.sub.2 is hydrocarbon residue having 2-4 carbon atoms with lead monoxide. The composition is polymerized to obtain a radiation shielding polymer.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KYOWA GAS CHEMICAL INDUSTRY CO., LTD.TOKYO11

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nagai, Haruo Nukata-gun, JP 13 131
Nunokawa, Kunikazu Kurokawa, JP 1 6
Uehara, Hiroshi Saitama, JP 147 831

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Patent Info (Count) # Cites Year
 
BAR-RAY PRODUCTS, INC. (1)
5,856,415 Optically transparent metal-containing polymers 12 1997
 
LANXESS DEUTSCHLAND GMBH (1)
7,384,576 Lead-free mixture as a radiation protection additive 0 2003
 
MITSUBISHI RAYON CO., LTD. (1)
4,292,419 Process for producing radiation-shielding plastic materials 5 1980
 
Picker International, Inc. (1)
6,108,403 X-ray equalization filter 4 1998
 
SHRIRAM INSTITUTE FOR INDUSTRIAL RESEARCH (1)
8,173,754 Process for the synthesis and preparation of polymeric materials for use in optical applications such as plastic lenses 0 2007
 
Other [Check patent profile for assignment information] (1)
5,140,710 Bilayer X-ray eye shield 22 1990