| 摘要 |
PURPOSE: A UV shielding polyamide resin composition is provided to extremely restrain thread cutting, to semi-permanently impart UV-shielding performance without damages of UV shielding performance after cleaning. CONSTITUTION: A UV shielding polyamide resin composition comprises 0.01-5 parts by weight of polyethylene based ionomer, 0.01-5 parts by weight of inorganic particle, and acid salt of alkali metal. The average particle diameter is 10-900 nm. The refractivity is 1.8 or more. The refractivity difference of inorganic particle and polyamide resin is 0.3-1.7. The polyethylene based ionomer is carboxyl acid containing polyethylene based copolymer. 10-80 weight% of carboxylic acid is neutralized to metal ions. The carboxyl acid containing polyethylene based copolymer is methacrylic acid or acrylic acid containing polyethylene based copolymer. The inorganic particle is one or more selected from a group consisting of titanium dioxide, zinc oxide, ceria, zirconia, chromium trioxide, cupric oxide, iron trioxide and nickel oxide.
|
