The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1987
Filed:
Dec. 26, 1985
Kuniyuki Tokunaga, Tokuyama, JP;
Tsutomu Hashimoto, Kawasaki, JP;
Toyo Soda Manufacturing Co., Ltd., Shin Nanyo, JP;
Abstract
A packing material for liquid chromatography comprising monovinyl aromatic monomer and divinyl or polyvinyl aromatic monomer is disclosed, wherein, in gel permeation chromatography, exclusion limit molecular weight is not less than 1.times.10.sup.3 in terms of standard polystyrene, average particle diameter lies within a rage of 0.5 to 50 .mu.m and the constitution rate of divinyl or polyvinyl aromatic monomer in copolymer particles is not less than 60% by weight, and a method for the preparation thereof is claimed, wherein suspension polymerization is carried out in a mixed aqueous solution containing organic colvent which dissolves whole monomer containing not less than 60% by weight of divinyl or polyvinyl aromatic monomer in whole monomer by amounts of 50 to 300% by weight of the solvent to both monomers and does not dissolve the copolymer of these monomers and radical polymerization initiator.