| 摘要 |
PURPOSE:To obtain an agricultural covering material improved in heat insulation properties, transparency and slip properties by mixing a vinyl chloride resin with a specified hydrotalcite and Mg(OH)2 and molding the mixture. CONSTITUTION:100 pts.wt. vinyl chloride resin of a degree of polymerization of 600-2500 is mixed with 0.1-5 pts.wt. hydrotalcite of the formula (wherein 0<X<=0.5; 0.5<=a+b+c<1; a+b+c=1-X; a+b>c; 0<=b<1; 0<=c<0.5; M1 is Mg<2+>; M2 is Ca<2+> or Ba<2+>; M3 is Zn<2+>, Cd<2+> or Pb<2+>; A<n-> is an n-valent anion; and 0<=m<1) and having a mean particle diameter <=5mum, 0.1-5 pts.wt. Mg(OH)2 of a mean particle diameter <=5mum, desirably 0.5-3mum, and optionally a plasticizer, a stabilizer, an antifogging agent, a UV absorber, etc. |
