Resinous composition capable of releasing a bioactive substance at a controlled rate
申请人:Nippon Paint Co., Ltd.
公开号:EP0220965A2
公开(公告)日:1987-05-06
A bioactive substance control-releasing resinous composition comprising a resin having main chain and side chains, at least one side chain bearing at the end portion thereof an organic acid moiety having a biological activity through a metal ester bonding. The resin is hydrolyzed in an ionic atmosphere at a controlled rate to generate a bioactive substance as well as metal ions and is useful in various field and especially as resinous vehicle of coating composition.
Disintegration type resin particles, its preparation and coating composition containing the same
申请人:Nippon Paint Co., Ltd.
公开号:EP0286243A1
公开(公告)日:1988-10-12
Disintegration type resin particles having an average grain diameter of 0.01 to 250u. and being composed of a crosslinked resin having at least one crosslinking structure carried metal ester bond of the formula:
R1 is a monovalent, bioactive organic acid residue; M stands for a polyvalent metal having a valence of 3 or more; m is an integer of 2 or more; n is an integer of 1 or more, providing that the sum of m and n is equal to the valence of said metal @, and a coating composition containing said resin particles are provided. The coating obtained is characterized in that it is gradually hydrolyzed in an ionic atmosphere as in sea water and dissolved out, liberating a bioactive organic acid as well as metal ions.