Method of making hydrophilic non-sweating polymeri

专利名称：Method of making hydrophilic non-sweating

polymerizable dental impression material

发明人：Robert V. Hare申请号：US09818270申请日：20010327公开号：US06552104B1公开日：20030422

摘要：Improved very high viscosity (putty) two component polymerizable

polyorganosiloxane composition for use in making non-sweating, low liquid mass lossdental impressions, having improved tear strength, handling and wettability. Improvedtear strength results from inclusion of a quadri-functional polysiloxane having a vinylcontent of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficientamounts of a retarder composition that delays onset of the vinyl polymerization.Handling is improved by the addition of a very high viscosity linear vinyl terminatedpolydimethylsiloxane which reduces tackiness and improves the shelf stability.

Wettability is improved by including a surfactant resulting in a surface contact angle withwater at three minutes of less than 50°. The surfactant chosen has an HUB of 8-11, suchthat the wetting contact angle is achieved within less than two minutes and remainswetting throughout the working time of the impression taking, substantially improvingthe impression making process.

申请人：DENTSPLY RESEARCH & DEVELOPMENT CORP.

代理人：Dale R. Lovercheck,James B. Bieber

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