Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1999-02-23
2000-12-12
Boykin, Terressa M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528176, 528193, 528196, 528271, C08G 6302
Patent
active
061600849
ABSTRACT:
Biodegradable shape memory polymer compositions, articles of manufacture thereof, and methods of preparation and use thereof are described. In one embodiment the compositions include at least one hard segment and at least one soft segment. The T.sub.trans of the hard segment is preferably between -30 and 270.degree. C. At least one of the hard or soft segments can contain a crosslinkable group, and the segments can be linked by formation of an interpenetrating network or a semi-interpenetrating network, or by physical interactions of the segments. Objects can be formed into a given shape at a temperature above the T.sub.trans of the hard segment, and cooled to a temperature below the T.sub.trans of the soft segment. If the object is subsequently formed into a second shape, the object can return to its original shape by heating the object above the T.sub.trans of the soft segment and below the T.sub.trans of the hard segment.
REFERENCES:
patent: 4575373 (1986-03-01), Johnson
patent: 4596728 (1986-06-01), Yang et al.
patent: 4804733 (1989-02-01), Bataille
patent: 4816094 (1989-03-01), Pomplun et al.
patent: 5049591 (1991-09-01), Hayashi et al.
patent: 5108755 (1992-04-01), Daniels
patent: 5128197 (1992-07-01), Kobayashi et al.
patent: 5139832 (1992-08-01), Hayashi et al.
patent: 5145935 (1992-09-01), Hayashi
patent: 5189110 (1993-02-01), Ikematu et al.
patent: 5418261 (1995-05-01), Helsemans et al.
patent: 5506300 (1996-04-01), Ward et al.
patent: 5591786 (1997-01-01), Oxman et al.
patent: 5635545 (1997-06-01), Oxman et al.
patent: 5665822 (1997-09-01), Bitler et al.
patent: 5665831 (1997-09-01), Neuenschwander et al.
patent: 5765682 (1998-06-01), Bley et al.
patent: 5776162 (1998-07-01), Kleshinski
patent: 5800516 (1998-09-01), Fine et al.
Cederstrom & Van Humbeeck, "Relationship between shape memory material properties and applications," Journal de Physique IV 5:C2-335-41 (1995).
Dagani, "Intelligent Gels," Chemistry & Engineering News 75:29-37 (1997).
Echigo, et al., "Development of a new transvenous patent ductus arteriosus occlusion technique using a shape memory polymer," ASAIO Trans. 36(3):M195-8 (1990).
Gordon, "Applications of Shape Memory Polyurethanes," Proceedings of the First International Conference on Shape Memory and Superelastic Technologies, SMST International Committee, pp. 115-19 (1994).
Hayashi, et al., "Properties and applications of polyurethane-series shape memory polymer," ANTEC 1998-2001 (1994).
He, et al., "Higher order structure and thermo-responsive properties of polymeric gel with crystalline side chains," Polymer Journa l28:452-7 (1996).
Ito, et al, "Variation of free volume size and contenct of shape memory polymer-polyurethane-upon temperature studied by positron annihilation lifetime techniques and infared spectroscopy," J. Radioanalytical and Nuc. Chem. 211:53-60 (1996).
Kagami, et al., "Shape memory behaviors of crosslinked copolymers containing strearyl acrylate," Macromol, Rapid Commun. 17:539-543 (1996).
Kim, et al., "Polyurethanes having shape memory effect," Polymer 37(26):5781-93 (1996).
Li, et al., "Crystallinity and morphology of segmented polyurethanes with diferent soft-segment length," J. Applied Polymer 62:631-38 (1996).
Linge & Dahm, "Praktische aspekte der verwendung von superelastischen drahtbogen in der edgewisetechnik," Forschr. Kieferorthop 55:324-329 (1994).
Nakasima, et al., "Potential application of shape memory plastic as elastic material in clinical orthodontics," Eur. J. of Ortho. 13:179-186 (1991).
Sakurai, et al., "Crystal trsnformation of styrene-butadiene block coplymer," Polymer35:4288-9 (1992).
Takahashi, et al. "Structure and properties of shape-memory polyurethane block copolymers," J. Applied Polymer Science 60:1061-69 (1996).
Tobushi, et al., "Mechanical properties of shape memory polymer of polyurethane series," JSME International Journal Series I 35:296-302 (1992).
Tobushi, et al., "Theromomechanical properties in a thin film of shape memory polymer of polyurethane series," SPIE 2716:46-57 (1996).
White & Ward, "Softenable, shape-memory thermoplastic for use in biomedical devices," Mat. Res. Soc. Symp. Proc. 110:635-640 (1989).
Grablowitz Hans
Langer Robert S.
Lendlein Andreas
Schmidt Annette
Boykin Terressa M.
Massachusetts Institute of Technology
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