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:
Jan. 11, 2000
Filed:
Sep. 12, 1997
Henri Wautier, Braine-le-Comte, BE;
Martine Kaszacs, Braine l'Alleud, BE;
Solvay (Societe Anonyme), Brussels, BE;
Abstract
Poly-.epsilon.-caprolactones produced by continuous melt polymerization of .epsilon.-caprolactone with the use of aluminium alkoxides are stabilized for storage by incorporation of an effective quantity of silicon derivative such as, for example, a silicon oxide, an inorganic silicate or a silicon alkoxide, preference being given to silicon alkoxides. This process has the effect of greatly limiting the gradual reduction in the inherent viscosity of the poly-.epsilon.-caprolactones in the course of time. In accordance with a preferred embodiment the incorporation of the silicon derivative is preceded by the incorporation of an effective quantity of water, and this further improves the storage stability of the poly-.epsilon.-caprolactones produced with the use of aluminium alkoxides.