Patent · US Active

Shape memory polymer with polyester and polyacrylate segments and process for its production and programming

US8124691B2 · kind B2 · utility

0Cited by

3References

12Claims

0Family size

Assignee

GKSS-Forschungszentrum Geesthacht GmbH · DE

Inventors

Steffen Kelch · Schlieren, CH
Andreas Lendlein · Berlin, DE
Ingo Bellin · Ludwigshafen am Rhein, DE

Key dates

Filing date	Oct 10, 2008
Grant date	Feb 28, 2012
Priority date	—
Expiry date	May 21, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2367/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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 (Ttrans,1, Ttrans,2) such that the polymer, depending on the temperature, as well as a permanent shape (PF), can also assume at least two temporary shapes (TF1, TF2). 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 CH3, and R1 is a saturated or unsaturated, cyclic or aliphatic, unsubstituted or substituted C1-C10 radical.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.