Global Patent Index - EP 0986362 A2

EP 0986362 A2 2000-03-22 - IMPROVED POLYVINYLSILOXANE IMPRESSION MATERIAL

Title (en)

IMPROVED POLYVINYLSILOXANE IMPRESSION MATERIAL

Title (de)

VERBESSERTES POLYVINYLSILOXAN-ABDRUCKMATERIAL

Title (fr)

MATERIAU A EMPREINTE AMELIORE AU POLYVINYLSILOXANE

Publication

EP 0986362 A2 (EN)

Application

EP 98924981 A

Priority

  • US 9810942 W
  • US 4790697 P

Abstract (en)

[origin: WO9853791A2] 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 DEG . 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.

IPC 1-7 (main, further and additional classification)

A61K 6/10

IPC 8 full level (invention and additional information)

A61K 6/10 (2006.01)

CPC (invention and additional information)

A61K 6/10 (2013.01)

Citation (search report)

See references of WO 9853791A3

Designated contracting state (EPC)

CH DE FR GB IT LI

EPO simple patent family

WO 9853791 A2 19981203; WO 9853791 A3 19990415; EP 0986362 A2 20000322; JP 2002515907 A 20020528

INPADOC legal status


2000-04-19 [18W] WITHDRAWN

- Date of withdrawal: 20000202

2000-03-22 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991126

2000-03-22 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): CH DE FR GB IT LI