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:
Feb. 28, 2012
Filed:
Oct. 10, 2008
Steffen Kelch, Oberengstringen, CH;
Andreas Lendlein, Berlin, DE;
Ingo Bellin, Mannheim, DE;
GKSS Forschungszentrum Geesthacht GmbH, Geesthacht, DE;
Abstract
The invention relates to a shape memory polymer, to a process for its production and to a process for its programming. The inventive shape memory polymer has at least two switching segments with different transition temperatures (T, T) such that the polymer, depending on the temperature, as well as a permanent shape (PF), can also assume at least two temporary shapes (TF, TF). The first switching segment is based essentially on a polyester of the general formula (I) where n=1 . . . 6 or a copolyester of the general formula (I) with different n or a derivative thereof. The second switching segment is based essentially on a polyacrylate of the general formula (II) in which R is H or CH, and Ris a saturated or unsaturated, cyclic or aliphatic, unsubstituted or substituted C1-C10 radical.