| 摘要 |
PURPOSE:To obtain a termite-resistant vinyl chloride resin having water- resistance to prevent the flow-off of termite-proofing agent with water and suitable for wire-coating insulation material by compounding a hydrophobic silica to a termite-resistant composition produced by compounding a vinyl chloride resin with a termite-proofing agent. CONSTITUTION:The objective termite-resistant vinyl chloride resin is produced by compounding (A) 100 pts.wt. of a vinyl chloride resin with (B) 1-10 pts.wt. of fenitrothion as a termiteproofing agent, (C) 20-150 pts.wt. of a plasticizer, (D) 1-15 pts.wt. of a stabilizer, (E) 0-150 pts.wt. of a filler and (F) 1-10 pts.wt. of a hydrophobic silica produced by substituting a part or total of silanol groups on the surface of silica with methyl group. The component F is uniformly dispersed in the composition to impart the composition with water-repellency. Accordingly, the dissolution and extraction of the component B with water or hot water can be prevented to keep the termite-proofing property over a long period. The composition is suitable as a wire-coating insulation material. |
