| 摘要 |
PURPOSE:To provide an injection needle which shows a good puncture performance immediately after coating by hardening the coating by gamma-ray irradiation after coating with a coating agent which contains amino group containing polyorganosiloxane shown by a specific formula and polydiorganosiloxane with a specific degree of polymerization. CONSTITUTION:An injection needle is coated by a coating agent consisting of 10-80wt.% of amino group containing polyorganosiloxane expressed by the formula and containing an amino group in a molecule and 20-90wt.% of polydiorganosiloxane containing a triorganosilyl group at the end of the molecular chain and treated on the surface by a hardening method including gamma-ray irradiation. In the formula, R<1> is a group selected from a group consisting of -OH, -OR<3> (R<3> is a monovalent hydrocarbon group of carbon number 1-4) and a monovalent hydrocarbon group, and R<2> is a monovalent hydrocarbon, A is a group selected from a group consisting of a monovalent hydrocarbon and groups containing an amino group, and m is an integer of 1-10000 and n is an integer of 0-10000. |
