| 摘要 |
PURPOSE: A method for controlling the growth of photosynthetic microorganisms on the surface of a plastic material and its composition are provided, with satisfying the excellent compatibility with a polymer, the stability and the good heat resistance. CONSTITUTION: A plastic material is processed by adding at least one compound selected from the group consisting of 2-methylthio-4-cyclopropylamino-6-(α,β -dimethylpropylamino)-s-triazine, 2-methylthio-4-cyclopropylamino-6-tert-butylamino-s-triazine, 2-methylthio-4-ethylamino-6-tert-butylamino-s-triazine and 2-methylthio-4-ethylamino-6-(α, β-dimethylpropylamino)-s-triazine, (a) during the processing of the plastic material, (b) during the polymerization or process of the plastic material when it is produced by a radical polymerization, or (c) during a cross-linking reaction when the plastic material is duroplasts produced from a phenol-formaldehyde resin, an epoxy resin or an aminoplastic resin.
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