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. 03, 2012
Filed:
Nov. 10, 2010
Ilse Casteren Van, Waalwijk, NL;
Marc Roelands, Waalwijk, NL;
Gerardus Cornelis Overbeek, Waalwijk, NL;
Ronald Tennebroek, Waalwijk, NL;
Ilse Casteren Van, Waalwijk, NL;
Marc Roelands, Waalwijk, NL;
Gerardus Cornelis Overbeek, Waalwijk, NL;
Ronald Tennebroek, Waalwijk, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
An aqueous composition with a sediment content ≦5%, comprising a polyurethane dispersion wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt % of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of (a) ≦5 wt % of 1-methyl-2-pyrrolidinone by weight of the polyurethane, (b) 5 to 100 wt % of 1-ethyl-2-pyrrolidinone by weight of polyurethane and (c) water.