Patent US4568707A successfully refreshed from Google Patents.
US4568707A
Expired / Lapsed
US
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Silicone pastes formulated with a structural viscosity for impression materials
Assignee: Kulzer GmbH
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Filing: 1985-03-12
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Granted: 1986-02-04
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Expires: 2005-03-12
Abstract
Abstract In a polysiloxane-based composition which crosslink by addition, comprising (a) an organosiloxane with two or more vinyl groups in the molecule, (b) and organo-hydridopolysiloxane, as a crosslinking agent, (c) a catalyst for accelerating the addition reaction, (d) a hydrophobic filler and (e) optionally a dyestuff pigment, the improvement which comprises (f) hydrogenated castor oil as a structuring agent. The composition is highly viscous and will not run but can readily be stirred.
Inventors
- 👤 Reiner Voigt
- 👤 Peter Schwabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:38
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; A; A61; A61K; A61K6/00; A61K6/90; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/04; C08K5/10; C08L91/00; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
In a polysiloxane-based composition which crosslink by addition, comprising (a) an organosiloxane with two or more vinyl groups in the molecule, (b) and organo-hydridopolysiloxane, as a crosslinking agent, (c) a catalyst for accelerating the addition reaction, (d) a hydrophobic filler and (e) optionally a dyestuff pigment, the improvement which comprises (f) hydrogenated castor oil as a structuring agent.
Claim 2
Dependent Claim
58 words
In a polysiloxane-based composition which crosslink by addition, comprising (a) an organosiloxane with two or more vinyl groups in the molecule, (b) and organo-hydridopolysiloxane, as a crosslinking agent, (c) a catalyst for accelerating the addition reaction, (d) a hydrophobic filler and (e) optionally a dyestuff pigment, the improvement which comprises (f) hydrogenated castor oil as a structuring agent.
Claim 3
Dependent Claim
17 words
A composition according to claim 1, containing about 0.1 to 3% by weight of hydrogentated castor oil.
Claim 4
Dependent Claim
17 words
A composition according to claim 1, containing about 0.2 to 1.8% by weight of hydrogentated castor oil.
Claim 5
Dependent Claim
20 words
A composition according to claim 1, wherein the hydrogenated castor oil has a melting range from 80° to 95° C.
Claim 6
Dependent Claim
20 words
A composition according to claim 1, wherein the hydrogenated castor oil has a melting range from 82° to 90° C.
Claim 7
Dependent Claim
30 words
In the making of an impression wherein a composition is placed about a shaped mass and allowed to harden the improvement which comprises employing a composition according to claim 1.
Claim 8
Dependent Claim
18 words
In the making of a dental impression, the improvement which comprises employing a composition according to claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |