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. 06, 2015
Filed:
Apr. 22, 2011
Karl Kratz, Berlin, DE;
Andreas Lendlein, Berlin, DE;
Ulrike Voigt, Hamburg, DE;
Wolfgang Wagermaier, Potsdam, DE;
Karl Kratz, Berlin, DE;
Andreas Lendlein, Berlin, DE;
Ulrike Voigt, Hamburg, DE;
Wolfgang Wagermaier, Potsdam, DE;
Abstract
The invention relates to a method for programming a shape memory polymer, which comprises at least one switching segment having at least one thermal phase transition and covalent and/or non-covalent cross-linking points such that the shape memory polymer after the programming thereof is in a position to transition from a programmed temporary shape into the permanent shape thereof, following a temperature increase to a temperature that at least corresponds to a switching temperature (T, T). According to the invention, the method comprises (a) predetermining a programming temperature (t) as a function of a desired switching temperature (T, T), (b) heating the shape memory polymer to the predetermined programming temperature (t), and transferring the polymer into a shape that corresponds to the temporary shape by applying a forced molding state, and (c) cooling the polymer to a temperature below the desired switching temperature (T, T) while maintaining the forced molding state.