低収縮ＳＭＣ用スカミングのない添加ポリマーの試作

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タイトル別名
  • Trial of Mold Scummingless Additive Polymer for Low Profil SMC
  • テイ シュウシュク SMCヨウ スカミング ノ ナイ テンカ ポリマー ノ シ

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説明

A study was carried out to prove a varidity of the new principle to prevent the growth of scumming on the surface of the low profile SMC moldings. Styrene-divinylbenzene (ST-DVB) polymers were prepared by suspension polymerization and used as additive polymer for low profile SMC. These SMC were molded and evaluated with special emphasis on the mold scumming, shrinkage and surface waveness. As the results, it was confirmed that the optimum content of DVB was 0.2% by weight for ST, the low profile moldings were obtained without scumming whenever loosely cross linked additive polymer containing 0.2% DVB [I] were used for the unsaturated polyesters [II] including vinylesters and to get around producing minute surface wave of moldings, the desirable particle size was under 50 μm. The physical anchloring principle would be able to applied to the SMC containing various types of [I] and any kind of [II] to obtain scammingless moldings.

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