Development and practical application of low viscous dual cure impression material

针对目前市场上化学固化硅印模材料的不足，实验研制了光固化和化学双固化印模材料.对加入CQ或QTX，改变基料与催化剂的配比，制备的加成型硅橡胶印模材料的永久变形和交联聚合度进行了测试。这些材料的聚合反应被延迟，并且尽管增加辐照时间或添加甲基丙烯酸甲酯、HEMA，其没有显示出改善的迹象。在硅丙乳液DK-7500中加入光引发剂、六水合六氯铂酸氢和二月桂酸二丁基锡均未发生聚合反应. PGHDDT（聚丙二醇、二异辛酸甘油酯、二月桂酸甘油酯、2-HEMA）在60秒的辐照下发生聚合反应，但这些实验产物的弹性性能并不一致.用硅丙乳液DK-7500代替聚丙二醇配制PGHDDT。本实验产物未发生聚合反应.试验了PGIEDT（聚丙二醇、甲基丙烯酸异辛酯、二月桂酸甘油酯）加入不同比例的CQ和MED或另一种光引发剂QTX的情况。这些实验产物的聚合反应度不一致.制备了聚丙二醇2000、二苯甲烷二异氰酸酯、甲基咪唑等不同配比的聚氨酯印模材料并进行了测试。聚合反应度和弹性不足，虽然成功地制成了光固化材料，但弹性仍然不足。我们计划在不久的将来研制出具有弹性的双固化硅印模材料，并对其工作时间、固化时间、弹性变形、永久变形和细节再现进行测试。

Light and chemical dual cured impression materials were experimentally made to cover the weak point of chemical cured silicon impression materials on the market.1. Set and the degree of cross-linking polymerization of the addition type silicon rubber impression materials adding CQ or QTX and changing the ratio of base and catalyst were tested. Polymerization reaction of these materials was delayed and it showed no sign of improvement in spite of increasing the irradiation time or adding metylmethacrylate, HEMA.2. Polymerization reaction did not occur in silicon acryl emulsion DK-7500 adding photo initiator, Hydrogen Hexachloroplatinate (IV) Hexahydrate and dibutyltin dilaulate.3. Polymerization of PGHDDT (polypropylene glycol, hexamethylene diisocianate, dibutyl tin dilaulate, 2-HEMA) was observed by the 60 seconds irradiation, but elastic properties of these experimental products were not sufficient.4. Silicon acryl emulsion DK-7500 was used instead of polypropylene glycol in PGHDDT. Polymerization reaction of this experimental product did not occur.5. PGIEDT (polypropylene glycol, isocianate ethylmethacrylate, dibutyl tin dilaulate) adding various ratio of CQ and MED, or another photoinitiator QTX was tested. The degree of polymerization reaction of these experimental products was not sufficient.6. Polyurethane impression materials of various ratio of polypropylene glycol 2000, Diphenylmethane diisocianate, methyl imidazole were made and tested. The degree of polymerization reaction and elasticity were not sufficient.Light cured materials were successfully made but the elasticity was still lacking. We have a plan to develop dual cure silicon impression materials possessing the elasticity, and test the working and setting time, elastic deformation, permanent deformation and detail reproduction in near future.