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Polyvinylsiloxane impression material

Номер патента: US5830951A. Автор: Jurgen Hans Fiedler. Владелец: DENTSPLY DETREY GMBH. Дата публикации: 03-11-1998.
Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50°. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality. A low viscosity impression material is provided and includes a base component and a catalyst component. Both components are siloxane-based materials.

Polyvinyl siloxane impression material

Номер патента: DE69733361T2. Автор: Hans Jurgen FIEDLER. Владелец: DENTSPLY INTERNATIONAL INC. Дата публикации: 17-11-2005.

Improved polyvinylsiloxane impression material

Номер патента: WO1998053791A2. Автор: Jurgen Hans Fiedler, Robert V. Hare. Владелец: DENTSPLY INTERNATIONAL INC.. Дата публикации: 03-12-1998.
Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50°. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality. A low viscosity impression material is improved and includes a base component and a catalyst component. Both components are siloxane-based materials.

Dental Impression Material

Номер патента: SE9902323D0. Автор: Jurgen Hans Fiedler. Владелец: Dentsply Int Inc. Дата публикации: 18-06-1999.

Improved polyvinylsiloxane impression material

Номер патента: EP0946128B1. Автор: Jurgen Hans Fiedler. Владелец: DENTSPLY INTERNATIONAL INC. Дата публикации: 25-05-2005.
Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50°. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality. A low viscosity impression material is provided and includes a base component and a catalyst component. Both components are siloxane-based materials.
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