| 摘要 |
PROBLEM TO BE SOLVED: To provide a material free from deterioration over a long term, regardless of being embedded in vivo. SOLUTION: This material is a formed zaon-biodegradation product made of a crack resistant embeddedable protaise, implant or the like, formed out of polyolefine copolymer. Furthermore, the polyolefine copolymer is formed so that a majority of polymer bonds along a copolymer chain have principal chains as alternate quaternary and secondary carbon atoms. Also, the polyolefine copolymer is the reaction product of the first rubber component containing quaternary carbon for producing polymer of low hardness when polymerized alone, as well as the second curing component for producing polymer of high hardness. In addition, the polyolefine copolymer as the first and the second reaction products has an elastomer function. At the same time, the polyolefine copolymer has an intermediate hardness between high and low levels, and becomes crack resistant when embedded in vivo. |
