Biostable elastomeric polymers having quaternary carbons

Details Biostable elastomeric polymers having quaternary carbons Biostable elastomeric polymers having quaternary carbons

A - Human Necessities

61

L

A61L 27/00 (2006.01) A61L 27/16 (2006.01) B29C 41/08 (2006.01)

Patent

CA 2210034

An article of manufacture and method of making and implanting the article made of a polyolefin star or linear copolymer are disclosed in which the polyolefin copolymer is biostable and crack-resistant when implanted in vivo. The polyolefin copolymer is the reaction product of a rubbery component which when homopolymerized produces a polymer having a low level of hardness, and a hardening component which when homopolymerized produces a polymer having a high level of hardness. The polyolefin copolymer is elastomeric, has a hardness intermediate the low and high levels of hardness, and has a backbone in which the majority of polymer linkages along the copolymer chain are alternating quaternary and secondary carbon atoms.

On divulgue un article de fabrication et une méthode pour fabriquer et implanter un article fait d'un copolymère polyoléfinique en étoile ou linéaire dans lequel le copolymère polyoléfinique est biostable et résistant à la craquelure après implantation in vivo. Le copolymère polyoléfinique est le produit de réaction d'un constituant caoutchouteux qui, après homopolymérisation, donne un polymère ayant un faible degré de dureté, et un constituant de durcissement qui, après homopolymérisation, donne un polymère ayant un haut degré de dureté. Le copolymère polyoléfinique est élastomérique, a une dureté intermédiaire entre les degrés de dureté faible et élevé, et possède un squelette dans lequel la majorité des liaisons polymériques le long de la chaîne de copolymère font intervenir des atomes de carbone quaternaires et secondaires en alternance.

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