C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 3/22 (2006.01) C09K 11/02 (2006.01) C09K 11/64 (2006.01) C09K 11/77 (2006.01) F21K 2/00 (2006.01)
Patent
CA 2165379
Disclosed are a phosphorescent synthetic resin material capable of absorbing and accumulating light therein in the light and phosphorescing in the dark, a method for the production of the material, and a formed article or molded article made of the phosphorescent synthetic resin material. The phosphorescent synthetic resin material having a phosphorescent pigment, SrAl2O4, uniformly dispersed in the synthetic resin is obtained by mixing the synthetic resin with the phosphorescent pigment and an activator and kneading the resultant mixture at a temperature 10 to 20 °C higher than the melting point of the synthetic resin. In a preferred embodiment, the resultant compound is extruded at a temperature to 20°C higher than the melting point of the synthetic resin under an extrusion pressure in the range of 50 to 130 kg/cm2 and the extruded strands are chopped to produce pellets. By injection molding or extrusion molding the produced pellets into a desired shape, the formed article of synthetic resin possessing outstanding phosphorescent properties is obtained.
Ishihara Kiyomitsu
Koma Toru
Yamaguchi Yoshiharu
Yonetani Takayuki
Gowling Lafleur Henderson Llp
Ykk Corporation
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