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:
Jul. 01, 2003
Filed:
Mar. 30, 2000
Horst Mühlfeld, Grasellenbach, DE;
Silke Wagener, Landau, DE;
Firma Carl Freudenberg, Weinheim, DE;
Abstract
A polyurethane molding mass that can be processed thermoplastically, that is free of by-products capable of migration, and demonstrates a high level of light-fastness. A polyurethane molding mass that can be processed thermoplastically, that is free of cyclic oligourethanes capable of migration, and demonstrates a high level of light-fastness, can be obtained, according to the invention, by reaction of one or more aliphatic polyols with a molecular weight of 450 to 4000 g/mol and an OH number of 20 to 235, selected from the group of polyadipates, polycaprolactones, polycarbonates, polytetrahydrofurane, and corresponding copolymers or mixtures of them, with 1,6-hexamethylene diisocyanate and a chain lengthening agent selected from the group of 1,5-pentane diol, 1,6-hexane diol, and 1,4-cyclohexane diol, with an equivalence ratio of the 1,6-hexamethylene diisocyanate to the polyol of 1.5:1 to 14.0:1, where the NCO characteristic number, formed from the quotient of the equivalence ratios of isocyanate groups to the sum of the hydroxyl groups of polyol and chain lengthening agent, multiplied by 100, lies in the range of 96 to 105.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile