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2-component initiator system (amine free) with storage stability and especially suitable for acidic systems

An initiator and system technology, applied in dental preparations, dental prostheses, compression mold cups, etc., can solve problems such as discoloration

Active Publication Date: 2008-02-27
HERAEUS KULZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the initiator system is clearly reactive in acidic environments as documented, the amines contained can also generally cause discoloration of these products

Method used

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  • 2-component initiator system (amine free) with storage stability and especially suitable for acidic systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0637] Test description / example:

[0638] Two components denoted below as matrix component and catalyst component (B or C) were prepared according to a common preparation method. To do this, the monomers are first mixed in to form a homogeneous mixture. The initiator ingredients are then added and dissolved by stirring vigorously using a magnetic stirrer.

[0639] The specific properties of the 2-component initiator system of the present invention were tested in more detail in the compositions below. The reference system is the combination of component B1 with C1 and C2.

[0640] Matrix composition

[0641] B1Bis-GMA 20.580

[0642]

[0643] TEGDMA 8.820

[0644] DBPO0.600

[0645] B2 Bis-GMA 20.790

[0646] TEGDMA 8.910

[0647]CHP 0.300

[0648] B9 Bis-GMA 20.37

[0649] TEGDMA 8.73

[0650] CHP 0.900

[0651] B10 Bis-GMA 19.347

[0652] TEGDMA 8.291

[0653] Acrylic 1.455

[0654] CHP 0.907

...

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Abstract

A two-component initiator system having accelerators for curing polymerizable materials comprising the following components: (a) a hydroperoxide compound containing one or more hydroperoxide groups that are bound to a tertiary carbon; (b) a thiourea derivative; and (c) as accelerator, a copper compound which is soluble in the preparation is preferably free of amine and is particularly suited for polymerizable dental compositions.

Description

technical field [0001] The present invention relates to a novel two-component initiator system containing accelerators for curing polymerizable materials. Background technique [0002] Two-component initiator systems for curing polymerizable materials are known: [0003] 1. Benzoyl peroxide / tertiary aryl amine: Dibenzoyl peroxide has the highest thermal stability among amine-initiated peroxides. However, continued heating of the formulation results in rapid spontaneous curing. The disadvantage of their use in dentistry is the slow oxidation of the amines, which can lead to a yellow-brown discoloration that is aesthetically pleasing. In an acidic environment, such as is required for bonding, the amines are immediately protonated and thus deactivated in an acid-base reaction. Under these conditions the use of 2 component systems may not be used. [0004] 2. Barbituric acid derivatives: In dental applications, it is desirable to use barbituric acid initiator systems, since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/087C08F4/06A61K6/884A61K6/891
CPCA61K6/0032A61K6/0017A61K6/0023C08F4/40A61K6/083A61K6/09A61K6/50A61K6/20A61K6/893A61K6/30A61K6/887C08L33/00C08L75/16
Inventor A·乌特奥德特H·亨嫩
Owner HERAEUS KULZER
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