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:
Jun. 06, 1978
Filed:
Oct. 20, 1975
Ceskoslovanska akademie ved, Prague, CS;
Abstract
Three-dimensional polymeric material in the form of spherical particles of diameter .ltoreq.3 mm and containing up to 40% of free aldehyde groups which exhibits a measurable specific surface area is prepared by copolymerization of an aldehyde monomer R.sub.1 CH.dbd.C(CH.dbd.O)R.sub.2, where R.sub.1 is H, C.sub.1-5 alkyl, aryl or furyl and R.sub.2 is H, C.sub.1-5 alkyl, halogen, CN, phenyl or furyl, with a crosslinking agent in the aqueous dispersion phase. The dispersion contains 1 - 25% of a component reducing the monomer solubility in water, which is either an inorganic salt of alkali metal or alkaline earth metal or a water-soluble alcohol. The crosslinking agent used as comonomer is divinylbenzene, diester CH.sub.2 .dbd.C(R.sub.1)COOR.sub.2 OCOC(R.sub.1).dbd.CH.sub.2 (R.sub.1 .dbd. H, C.sub.1-10 alkyl or halogen; R.sub.2 .dbd. C.sub.1-10 alkylene or hydroxyalkylene), or diamide CH.sub.2 .dbd.C(R.sub.1)CONHR.sub.2 NHCOC(R.sub.1).dbd.CH.sub.2 (R.sub.1 .dbd. H, C.sub.1-10 alkyl or halogen; R.sub.2 .dbd. C.sub.1-10 alkylene or phenylene). The material may be used in continuous column processes, e.g. in catalysis of organic syntheses, separation of amines, and immobilization of compounds which contain primary amino groups.