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. 28, 1976
Filed:
Dec. 22, 1975
Applicant:
Inventors:
Assignee:
Societa' Italiana Resine S.I.R. S.p.A., Milan, I;
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
2608 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ;
Abstract
Polyoxymethylene is prepared by feeding anhydrous formaldehyde into a reaction medium containing a liquid organic diluent non-solvent for the polyoxymethylene and non-reactive towards the other constituents of the reaction medium, and containing in a dispersed form a polymer A carrying a terminal ionic couple on its macromolecular chain, said polymer A being a polylactamic block of recurring units ##STR1## wherein PM is a linear polymethylene chain having from 3 to 13 carbon atoms, and being present in a proportion of from 0.001 to 0.1% by weight with respect to the polyoxymethylene.