| 摘要 |
A microencapsulated active agent, such as an insecticide, a hormone, or a fertilizer for application to vegetation and a method for its preparation is disclosed. An active agent is encapsulated in lignin, a naturally occurring polymer which is a structural component of the plant cell wall. Lignin serves not only as the capsulate material, but also as a sunscreen which protects the agent from ultraviolet radiation. There is also disclosed a process for the preparation of the microcapsules of the invention which does not use toxic materials requiring subsequent removal. |
