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Redox-curing type nonaqueous curable composition

a non-aqueous curable, redox-curing technology, applied in dental prosthetics, impression caps, surgery, etc., can solve the problem of insufficient adhesive strength, achieve the effect of high adhesive strength, improve the curing property of polymeric materials, and secure the time necessary

Inactive Publication Date: 2010-09-23
KURARAY NORITAKE DENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text discusses the problem of conventional redox-curing type aqueous curable compositions used in adhesive applications. These compositions have either a short work time or require a long curing time, and cannot provide sufficient adhesive strength against a wetting material. The inventors found that polymerization inhibition caused by oxygen occurs on the adhesion interface with a wetting material, and by selectively accelerating the redox reaction on this interface, the adhesive strength against a wetting material can be improved without reducing the work time. The invention provides a redox-curing type curable composition that can secure time for adhesion and exhibit high adhesive strength against a wetting material, particularly a biological hard tissue such as dentine.

Problems solved by technology

When the resin-based curable composition is adhered onto a wetting material, sufficient adhesive strength is not attained due to curing inhibition caused by oxygen present on the adhesion interface in many cases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0068]Agents A1-1 and A1-2 having compositions described below were prepared and combined, so as to produce a divided type nonaqueous curable composition (present composition) including these agents in a weight ratio of 1:1. In the composition obtained by mixing the agents A1-1 and A1-2, sodium sulfite was in a dispersed state. The divided type nonaqueous curable composition was subjected to a curing time test (P1) and a tensile bond strength test (Q1) described below, so as to obtain a curing time and tensile bond strength. The results are listed in Table 1 below. It is noted that the average particle diameter of a powdered water-soluble reducing compound (that is, a sodium sulfite powder in Embodiment 1) was measured by using ethanol as a dispersing medium with a laser diffraction particle size analyzer SALD-2100 (manufactured by Shimadzu Corporation) (which measurement method was similarly employed in other embodiments below).

Agent A1-1:Bis-GMA40 parts by weightHEMA20 parts by we...

embodiment 2

[0071]An agent A2-2 having a composition described below was prepared by replacing 3 parts by weight of a sodium sulfite powder of the agent A1-2 of Embodiment 1 with 2 parts by weight of a potassium sulfite powder, and the agent A2-2 was combined with the agent A1-1 of Embodiment 1, so as to produce a divided type nonaqueous curable composition (present composition) including these agents in a weight ratio of 1:1. In the composition obtained by mixing the agents A2-2 and A1-1, potassium sulfite was in a dispersed state. This divided type nonaqueous curable composition was subjected to the aforementioned curing time test (P1) and tensile bond strength test (Q1) so as to obtain a curing time and tensile bond strength. The results are listed in Table 1 below.

Agent A2-2:Bis-GMA40 parts by weightHEMA40 parts by weightTEGDMA20 parts by weightPotassium sulfite powder (with an average 2 parts by weightparticle diameter of 9.9 μm)

embodiment 3

[0075]Agents B1-1 and B1-2 having compositions described below were prepared and combined, so as to produce a divided type nonaqueous curable composition (present composition) including these agents in a weight ratio of 1:1. In the composition obtained by mixing the agents B1-1 and B1-2, sodium sulfite was in a dispersed state. This divided type nonaqueous curable composition was subjected to the aforementioned curing time test (P1) for obtaining a curing time and was also subjected to a tensile bond strength test (Q2) described below for obtaining tensile bond strength. The results are listed in Table 2 below.

Agent B1-1:Bis-GMA40 parts by weightHEMA30 parts by weightNPG30 parts by weightBPO 1 part by weight

Agent B1-2:Bis-GMA40 parts by weightHEMA30 parts by weightNPG30 parts by weightSodium sulfite powder (with an average particle 1 part by weightdiameter of 6.1 μm)

[Tensile Bond Strength Test (Q2)]

[0076]The labial surface of a lower anterior tooth of a bovine was polished with #80 ...

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Abstract

The present invention relates to processes of making a cured dental adhesive compositions, in contact with a wetting material surface, by contacting the wetting material surface having water present on the surface with a nonaqueous composition including at least one liquid radical polymeric monomer (a), an organic peroxide (b), and a water-soluble reducing compound (c) in the form of a solid, where the water-soluble reducing compound (c) is dispersed in the liquid radical polymeric monomer (a); and solvating the water-soluble reducing compound (c) present at an interface between the redox-curing nonaqueous curable composition and the wetting material with the water present on the wetting material surface.

Description

TECHNICAL FIELD[0001]The present invention relates to a redox-curing type nonaqueous curable composition, and more particularly, it relates to a redox-curing type nonaqueous curable composition whose curing reaction is accelerated through a contact with a wetting material including moisture (hereinafter simply referred to as a “wetting material”).BACKGROUND ART[0002]An adhesive material is used for healing / treating wetting materials like biological hard tissues such as teeth and bones. As an adhesive material used for a wetting material, a resin-based curable composition including a radical polymeric monomer, a polymerization initiator and so on is generally used.[0003]Means for improving the adhesive property of the resin-based curable composition against a wetting material and more particularly a biological hard tissue is conventionally roughly divided into the following two proposals: One of the proposals relates to a radical polymeric monomer including an acidic group for improv...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K6/00
CPCA61L24/04A61K6/0023C08F4/40A61K6/30
Inventor KAWASHIMA, MITSUNOBUTAKASE, AKI
Owner KURARAY NORITAKE DENTAL
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