| 摘要 |
PURPOSE:To obtain the subject foam free from the generation of corrosive gases in combustion and excellent in flame retardance, softness and foamed appearance by blowing the composition composed of a polyolefin resin, red phosphorus, a thermally expandable graphite and a blowing agent at specific ratios. CONSTITUTION:(A) 100 pts.wt. of a polyolefin resin is compounded with (B) 1-30 pts.wt. of a red phosphorus of preferably <=20mu in particle diameter, (C) 1-30 pts.wt. of a thermally expandable graphite having a dilatation of >=100cc/g at 1000 deg.C and particle diameter of 80-120 mesh and (D) 1-30 pts.wt. of a blowing agent (preferably a decomposable blowing agent, e.g. azodicarbonamide). The objective foamy is obtained by blowing the obtained composition. Further, the component C is obtained e.g. by electrolytic oxidation of scaly graphite in sulfuric acid. |
