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:
Dec. 09, 1980
Filed:
Dec. 19, 1978
Lubomir Lochman, Prague, CS;
Jiri Trekoval, Prague, CS;
Ceskoslovenska akademie ved, Prague, CS;
Abstract
The invention pertains to a method for preparation of polymers, grafted polymers, and copolymers from olefins substituted by polar groups (ester, nitrile, or aryl) or from dienes, wherein the polymerization is initiated by the system formed by mixing of an organic amide of alkaline metal with an alkaline metal alkoxide. The organic amide is derived from primary or secondary amines or polyamines, or from tertiary polyamines containing at least one primary or secondary amino group. These amines contain N-C or N-Si bonds, 1-4000 C atoms and 1-1000 N atoms in a molecula, or have the molecular weight below 100,000. The alkoxides are derived from C.sub.3 -C.sub.16 alcohols. The polymerizations are carried out at -80.degree. to +80.degree. C. (advantageously at +20.degree. C.), at the monomer/organic amide molar ratio 5-1500, at the molar ratio alkoxide/amide 0.5-10, and in hydrocarbon or ether solvents. The advantage of organic amides of alkaline metals is the easy and economical preparation and suitable physical and chemical properties (solubility, higher resistance to contamination), while the alkoxide component exhibits the superadditive effect on the polymerization rate and yield and affects the microstructure of polymer. The method is also suitable for preparation of block copolymers by successive addition of various monomers, block copolymers with polyamine blocks, and grafted polyamine polymers.