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

Abstract

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.

Inventors:

Singhal, Pooja; Wilson, Thomas S.; Cosgriff-Hernandez, Elizabeth; Maitland, Duncan J.

Issue Date:

Tue Dec 12 00:00:00 EST 2017

Research Org.:

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1413249

Patent Number(s):

9840577

Application Number:

15/269,516

Assignee:

Lawrence Livermore National Security, LLC (Livermore, CA); The Texas A&M University System (College Station, TX)

Patent Classifications (CPCs):

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

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A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS

A61B17/0057 - {Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
A61B2017/00592 - {Elastic or resilient implements}
A61B2017/00606 - {Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening}
A61B2017/00623 - {Introducing or retrieving devices therefor}

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

C08G18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
C08G18/14 - {Manufacture of cellular products}
C08G18/165 - {covered by C08G18/18 and C08G18/24}
C08G18/3271 - {Hydroxyamines}
C08G18/3278 - {containing at least three hydroxy groups}
C08G18/4277 - {Caprolactone and/or substituted caprolactone}
C08G18/6622 - {with compounds of group C08G18/3271}
C08G18/6655 - {with compounds of group C08G18/3271}
C08G18/73 - acyclic
C08G2230/00 - Compositions for preparing biodegradable polymers
C08G2280/00 - Compositions for creating shape memory
C08G63/00 - Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
C08G63/60 - derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
C08G63/6852 - {derived from hydroxy carboxylic acids}
C08G71/04 - Polyurethanes

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

C08J2375/06 - from polyesters
C08J9/00 - Working-up of macromolecular substances to porous or cellular articles or materials

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DOE Contract Number:  

AC52-07NA27344

Resource Type:

Patent

Resource Relation:

Patent File Date: 2016 Sep 19

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE