| 摘要 |
What is disclosed is a pearl polymer product, a method of making the same, and the use thereof as a carrier for biologically active materials, said product being composed of hollow pearl particles having a diameter from 5 to 1000 microns and consisting of a cross-linked polymer which is a cross-linked homopolymer or copolymer comprising at least one member selected from the group consisting of acrylamide, methacrylamide, methylene-bis-acrylamide and methylene-bis-methacrylamide, said polymer containing at least 5 percent by weight of a monomer having at least two carbon-carbon double bonds which are activated by a neighboring phenyl group or carbonyl group, said polymer further being of a composition such that x+3y>/=40, where x is the percent by weight in the polymer of acrylamide and methacrylamide and y is the percent by weight in the polymer of methylene-bis-acrylamide and methylene-bis-methacrylamide. |
