| 摘要 |
<p>PROBLEM TO BE SOLVED: To clear the moldability, whitening and heat resisting temperature required as a burying cable protective pipe. SOLUTION: This cable protective pipe is formed by mixing a polyvinyl chloride having a polymerization degree of 800-2000 with a heat resisting ABS resin consisting of 10-90 wt.% of a graft polymer (b-1) obtained by polymerizing 50-90 wt.% of an aromatic vinyl monomer, 10-50 wt.% of a vinyl cyanide monomer, and 0-40 wt.% of another polymer copolymerizable with them under 10-80 wt.% of a conjugate diene rubber and a copolymer (b-2) obtained by emulsion- polymerizing 50-80 wt.% ofα-methyl styrene, 20-50 wt.% of a vinyl cyanide monomer and 0-30 wt.% of another monomer copolymerizable with them with an ash component of less than 0.2 wt.% in a proper weight ratio, and adding 0.05-10 pts.wt. of methyl tin reverse ester chloride to 100 pts.wt. of the total of the both to mold a thermoplastic resin composition.</p> |
