Development and practical application of low viscous dual cure impression material

为弥补市面上化学固化硅印模材料的不足，实验制备了光固化和化学双固化印模材料。对加成型硅橡胶印模材料加入CQ或QTX，以及改变碱、催化剂的配比，进行了固相和交联聚合程度的测试。尽管增加辐照时间或添加甲基丙烯酸甲酯、HEMA.2，但这些材料的聚合反应都被延迟，没有任何改善的迹象。2 .在丙烯酸硅乳液DK-7500中加入光引发剂、六氯铂酸氢（IV）和二磺酸二丁基锡，不发生聚合反应。用60秒辐照法观察了PGHDDT（聚丙烯乙二醇、六亚甲基二异氰酸酯、二丁基稀锡、2-HEMA）的聚合反应，但这些实验产物的弹性性能不够。用丙烯酸硅乳液DK-7500代替聚偏滴滴涕中的聚丙烯乙二醇。本实验产物未发生聚合反应。PGIEDT（聚丙烯乙二醇，异氰酸酯甲基丙烯酸乙酯，二丁基稀锡）加入不同比例的CQ和MED，或另一种光引发剂QTX。这些实验产物的聚合反应程度不够。制备了聚丙烯乙二醇2000、二苯基甲烷二异氰酸酯、咪唑甲酯等不同配比的聚氨酯压印材料，并进行了测试。聚合反应程度和弹性不够。光固化材料虽已成功制成，但其弹性仍显不足。我们计划在不久的将来开发具有弹性的双固化硅压印材料，并对其工作和凝固时间、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.