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:
May. 19, 1992
Filed:
Mar. 09, 1990
Robert F Harris, Midland, MI (US);
Michael D Joseph, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A polyahl comprising a backbone having at least one acyclic moiety selected from the group consisting of urea, biuret, thiourea, dithiobiuret, amide, and thioamide; and at least two polyalkyleneoxy moieties; and at least one terminal hydroxyalkyl carbamate group is disclosed. These polyahls may be prepared by contacting a modified polyamide compound containing in its backbone at least one acyclic moiety selected from the group consisting of urea, biuret, thiourea, dithiobiuret, amide, and thioamide wherein the amino groups are sufficiently spaced apart from each other that they do not undergo reaction with a single alkylene carbonate moiety to form a cyclic urea moiety, with a cyclic alkylene carbonate, in amounts thereof and under conditions effective to form the polyahl. Prepolymers and polymers prepared from such polyahls are also disclosed.