A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
400/1, 400/1301,
A61M 25/00 (2006.01) B29C 35/16 (2006.01) C08F 20/04 (2006.01)
Patent
CA 1278123
ABSTRACT The present invention provides a composition that softens at a predetermined temperature between about 20°C and about 62°C, comprising at least one block copolymer having at least two thermal transition temperatures. The composition is characterized by at least two thermal transition temperatures, one of which is a predetermined lower transition temperature between about 20°C to about 62°C and one of which is an upper transition temperature above about 62°C. The composition has the physical properties of a rigid, crystalline or glassy polymer below the predetermined transition temperature and the physical properties of a flexible, rubbery polymer at and above the predetermined transition temperature, but below the upper transition temperature. In a preferred embodi- ment, the composition of the present invention further comprises a plasticizer or polymer that has at least one thermal transition temperature and is thermodynamically compatible with at least one block of the block copoly- mer. For most biomedical applications, the composition of the present invention has a predetermined glass transition temperature at or near body temperature. The present invention also provides a method of making the composition, a method of making biomedical devices and materials and articles with shape-memory properties from the composition, and biomedical devices and materials and articles with shape-memory properties made from the composition.
499965
Riffle Judy S.
Ward Robert S.
Smart & Biggar
Thoratec Laboratories Corporation
LandOfFree
Compositions that soften at predeterminded temperatures and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compositions that soften at predeterminded temperatures and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositions that soften at predeterminded temperatures and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1222823