| 摘要 |
<p>PURPOSE:To provide a polyproplene resin coated steel pipe generating no deterioration of a polypropylene resin coating layer and improved in durability. CONSTITUTION:A coating layer is formed from a polypropylene resin compsn. prepared by compounding 0.05-3 pts.wt. of 3,9-bis{20[3-(3-t-butyl-4-hydroxy-5- methylphenyl)propionyloxy]-1,1-dimethylethyl}-2,4,8,10-tetraoxaspiro[5 ,5]undecane and 0.05-3 pts.wt. of dialkyl-3,3'-thiodipropionate with 100 pts.wt. of a polypropylene resin.</p> |
