Two Different Chlorination Processes of Copper Phthalocyanine and Their Effect on the Mold Shrinkage of Colored Plastics

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  • 銅フタロシアニンの二つの異なる塩素化過程とその着色プラスチック材の成形収縮に及ぼす効果
  • ドウ フタロシアニン ノ フタツ ノ コトナル エンソカ カテイ ト ソノ チャクショク プラスチックザイ ノ セイケイ シュウシュク ニ オヨボス コウカ

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Two chlorination processes of copper phthalocyanine (CuPc), homogeneous system based on eutectic blend composed of AlCl3 and NaCl (“AlCl3 process”) and heterogeneous system in trichlorobenzene (“TCB process”) are known. The product of the former process is quite effective in suppressing the mold shrinkage of colored polyethylene, while the latter exhibits no noticeable effect. The mechanism of the above different effect has been investigated from the standpoint of reaction products in both processes. The degree of chlorination as well as chlorinated positions is well defined in chlorinated CuPc prepared by AlCl3 process. On the other hand, the degree and the position of chlorination are broadly distributed in chlorinated products from TCB process. On the basis of the above results, both well-defined degree of chlorination and well-defined chlorinated position in CuPc products prepared by AlCl3 process are concluded to be the key factor to the suppression of nucleation effects in polyethylene, leading to the successful suppression of the mold shrinkage of colored plastics.

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