# US 10,307,345 B2 · Hydrophilic impression material with improved storage stability

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- Number: US 10,307,345 B2
- Document ID: US10307345B2
- Status: Granted
- Kind: B2
- Application number: 15/341,325
- Filed: 2016-11-02
- Published: 2017-10-19
- Granted: 2019-06-04
- Earliest claimed: 2015-11-02
- Assignees: DENTSPLY SIRONA Inc.
- Applicants: Christos Angeletakis
- Inventors: Christos Angeletakis
- Web page: https://patentgrep.com/patent/US10307345B2

## CPC

- A61K 6/90: Compositions for taking dental impressions
- A61K 6/60: comprising organic or organo-metallic additives
- C08K 3/36: Silica
- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- C08L 83/04: Polysiloxanes
- C08L 83/12: containing polyether sequences
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Disclosed herein is a dental impression material that includes a two part addition curing silicone composition. The disclosed impression material contains a surfactant system composed of a fluorosurfactant and a fatty alcohol ethoxylate. The impression material disclosed herein exhibits improved storage stability than known systems using fluorosurfactants and silicone ether compounds.

## Claims

### Claim 1

An impression material comprising a catalyst part and a base part,
the catalyst part comprises a curable organopolysiloxane polymer, a catalyst, at least one filler and at least one surfactant,
the base part comprises a curable organopolysiloxane polymer, an organopolysiloxane compound capable of crosslinking said curable organopolysiloxane polymer, at least, one filler and a combination of surfactants;
wherein the at least one surfactant of the catalyst part includes a monofunctional alcohol alkoxylate type surfactant;
wherein the combination of surfactants of the base part includes any combination of a silicone ether, a fluoroaliphatic polyoxyethylene type surfactant, and a monofunctional alcohol alkoxylate type surfactant;
wherein the fluoroaliphatic polyoxyethylene type surfactant is a C6 perfluorinated aliphatic chain bonded to a polyoxyethylene fragment giving an overall molecular weight range of from 400 to 800; and
wherein the monofunctional alcohol alkoxylate type surfactant is
wherein the sum of m and n is 9 or 10.

### Claim 2 (depends on 1)

The impression material according to claim 1, wherein the at least one surfactant of the catalyst part and one of surfactant of the combination of surfactants of the base part are the same.

### Claim 3 (depends on 1)

The impression material according to claim 1, wherein the at least one surfactant of the catalyst part and the combination of surfactants of the base part are different.

### Claim 4 (depends on 1)

The impression material according to claim 1, wherein the fluoroaliphatic polyoxyethylene type surfactant is
wherein n is from 5 to 7.