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Title: Ultra low density biodegradable shape memory polymer foams with tunable physical properties

Compositions and/or structures of degradable shape memory polymers (SMPs) ranging in form from neat/unfoamed to ultra low density materials of down to 0.005 g/cc density. These materials show controllable degradation rate, actuation temperature and breadth of transitions along with high modulus and excellent shape memory behavior. A method of m ly low density foams (up to 0.005 g/cc) via use of combined chemical and physical aking extreme blowing agents, where the physical blowing agents may be a single compound or mixtures of two or more compounds, and other related methods, including of using multiple co-blowing agents of successively higher boiling points in order to achieve a large range of densities for a fixed net chemical composition. Methods of optimization of the physical properties of the foams such as porosity, cell size and distribution, cell openness etc. of these materials, to further expand their uses and improve their performance.
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Issue Date:
OSTI Identifier:
Lawrence Livermore National Security, LLC (Livermore, CA); The Texas A&M University System (College Station, TX) LLNL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2016 Sep 19
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Polyurethane coating formulations based on polyepoxide-caprolactone polyols and polyisocyanates
patent, November 1976

Articles with polyurethane resin having memory shape characteristics and method of utilizing same
patent, February 1991

Processes for producing organic solvent free urethane/acrylic polymer laminating adhesive for flexible packaging
patent, November 1996

Polyol composition having good flow and formic acid blown rigid polyurethane foams made thereby having good dimensional stability
patent, June 1998

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patent, November 1999

Polyol compositions useful for preparing dimensionally stable, low density water-blown rigid foams and the processes related thereto
patent-application, December 2003

Shape memory polymers
patent-application, February 2006

Composition For Preparing A Biodegradable Polyurethane- Based Foam And A Biodegradable Polyurethane Foam
patent-application, October 2009

Low density semi-rigid flame resistant foams
patent-application, December 2009

Shape Memory Polymers
patent-application, February 2011

Post Polymerization Cure Shape Memory Polymers
patent-application, November 2011

Method For Programming A Shape Memory Polymer While Defining The Switch Temperature By Selection Of The Programming Temperature
patent-application, January 2012

Molded foam body having anisotropic shape memory properties, method for manufacturing same and article comprising the molded foam body
patent-application, December 2012

Poly(ε-caprolactone)-based hyperbranched polyurethanes prepared via A2+B3 approach and its shape-memory behavior
journal, August 2009

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