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聚胺脂是我国近年来出现的新材料,是由乙二醇、己二酸发生脂化反应生成乙二醇——己二酸聚脂,再加入MDI (丁二醇)而形成的高分子化合物。用这种材料制造密封圈,无
Polyurethane is a new material appeared in recent years in our country. It is made by the reaction of ethylene glycol and adipic acid to produce ethylene glycol-adipic acid polyester, then adding MDI (butylene glycol) Compound. Seals made of this material, none