Curable acrylate polymer compositions featuring improved flexural characteristics

a technology of acrylate polymer and composition, which is applied in the field of modified, acrylate polymer compositions featuring reduced, can solve the problems of difficult replacement with other types of monomers, often failing or less than satisfactory in applications requiring flexibility, and thin areas of such objects

Inactive Publication Date: 2006-02-16
SCI PHARMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] In accordance with one embodiment, there is provided a method of performing a dental procedure, comprising obtaining a curable composition comprising 10-90% by weight of one or more acrylic monomers and 1-60% by weight of an olefinic component compr

Problems solved by technology

While acrylic resins, due to a variety of available monomers, usually make it possible to compound a blend which, upon cure, will result in a polymer meeting the requirements of tissue biocompatibility, wear resistance, translucency, mechanical strength or hardness, they frequently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] A heat curable composition consisted of:

% (by weight)Diurethane dimethacrylate73.58Polybutene9.68BHT0.05Benzoyl peroxide1.06Silica15.63

[0031] The components were mixed and the material composition was cured in the oven at 100° C. for 1 hour. The properties of cured material are: Barcol hardness: 25-30; Flexural strength: 71 Mpa. The product was judged suitable for intended use, such as for a temporary crown and bridge material.

example 2

[0032] A light curable composition consisted of:

% (by weight)Diurethane dimethacrylate73.75Polybutene8.38Camphoroquinone0.26Methacroyl ethyl diethylamine0.75Silica16.86

[0033] The material was mixed and then cured for 20 seconds using an Optilux® dental curing device (light curing). The product was judged suitable for intended use.

example 3

[0034] A chemically curable composition consisted of a 1:1 (v / v) mixture of Parts A and B:

% (by weight)Part ADiurethane dimethacrylate78.96N,N bis(2-hydroxyethyl)-p-toluidine0.39Silica20.65Part BDiurethane dimethacrylate73.58Polybutene9.68BHT0.05Benzoyl peroxide1.06Silica15.63

[0035] The material was soft cured in 110 seconds and hard cured in 150 seconds at 23° C. (soft cure is defined as a stage at which the material becomes solid but exhibits flexibility). The properties of cured material are: Barcol hardness: 42-45; Flexural strength: 61 Mpa. The product was judged suitable for use.

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Abstract

The invention describes acrylic and methacrylic acid ester-based polymeric materials containing as flexibilizing and brittleness reducing agents 1-60% of C4-C8 polyalkylene or polyalkyldiene compounds, preferably having a molecular weight of 300-2100, and the use of such materials in dentistry and medicine.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to modified, acrylate polymer compositions featuring reduced brittleness, such polymers being particularly suitable as dental / medical cements and restorative materials and for manufacturing dental prosthetics. [0003] 2. Description of the Related Art [0004] Polymeric materials based on the esters of methacrylic acid have found widespread industrial and medical applications. Their role is particularly prominent in dentistry where they have become a base for modern restorative materials, cements, varnishes, cavity liners and sealers. In medicine perhaps the most important uses of acrylic resins include contact lenses and cements used for hip restorations. [0005] Many of these applications require the material to meet a combination of requirements with respect to their chemical, optical and mechanical properties and, frequently, biological compatibility. While acrylic resins, due to a variety of ...

Claims

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Application Information

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IPC IPC(8): A61K6/08A61K6/083A61K6/884A61K6/893
CPCA61K6/0017A61L24/046A61K6/083A61K6/09A61K6/0023A61C19/003C08L33/04C08L23/18C08L75/16A61K6/20A61K6/30A61K6/887A61K6/893A61K6/00C08F20/10C08F20/12C08F22/14C08L9/00C08L23/02C08L23/26C08L33/10C08L35/02
Inventor ORLOWSKI, JAN A.BUTLER, DAVID V.CHIN, ALICE
Owner SCI PHARMA INC
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