| 摘要 |
Disclosed is a method for preventing multiplication of algae which is characterized by coating the surfaces of solid materials with a silicone emulsion composition prepared by emulsion polymerization of: (1) 0.1 to 60% by weight of a reaction product prepared by reacting (A) 50 to 99.9% by weight of a polydiorganosilozane having more than one silanol group on the average in each molecule and having a viscosity of 5 to 10,000 cSt at 25 DEG C. with (B) 0.1 to 50% by weight of a product prepared by reacting (a) 1 mol of a compound represented by the formula: <IMAGE> wherein Q1 is a monovalent group selected from the group consisting of a hydrogen atom, -CH3, -CH2CH2NH2 and -CH2CH2NHCH2CH2NH2, R1 is a divalent hydrocarbon group having 1 to 4 carbon atoms, R2 and R3 are monovalent hydrocarbon groups each having 1 to 4 carbon atoms, and a is an integer of 0 or 1, with (b) 0.5 to 3.0 mol of a compound represented by the formula: <IMAGE> wherein Q2 is an epoxy group-containing group selected from a glycidoxy group and an epoxycyclohexyl group, R4 is a divalent hydrocarbon group having 2 to 4 carbon atoms, R5 and R6 are monovalent hydrocarbon groups each having 1 to 4 carbon atoms, and b is an integer of 0 or 1, and (2) 1 to 50% by weight of a compound represented by the formula: <IMAGE> wherein R7 and R8 are same or different substituted or unsubstituted hydrocarbon groups each having 1 to 50 carbon atoms, and n is an integer of 3 or more, in the presence of (3) 0.1 to 20% by weight of a quaternary ammonium salt surface active agent and (4) 20 to 90% by weight of water.
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