Amorphous Solid Composition for Stable Poorly Soluble Materials
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Solution Overview
Problem
There is a need for a new solid composition containing an amorphous poorly water-soluble material and a method for producing the same, as well as a method for easily determining the proportion of crystalline and amorphous materials in such compositions.
Innovation Solution
A solid composition comprising amorphous poorly water-soluble materials, hydroxypropylmethyl cellulose (HPMC), and polysaccharides of 5 or more sugars, with an XRD analysis value of 4.0% or less, and a method for producing this composition through heating and kneading, along with steps like cooling, crushing, and drying, and a method to calculate the proportion of crystalline and amorphous materials using XRD analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional amorphization methods (organic solvent method, melting method) are used, then water solubility of poorly water-soluble material is improved, but manufacturing complexity and process difficulty increase
Solution Approach 1:
The invention changes the physical state parameters of the poorly water-soluble material from crystalline to amorphous form, and adjusts the molecular mobility parameters by selecting polysaccharides with appropriate glass transition temperatures. This allows achieving improved water solubility through controlled parameter changes during the heating and kneading process, without requiring complex organic solvent systems or multiple processing steps.
Solution Approach 2:
The invention creates a composite material system consisting of amorphous poorly water-soluble material dispersed in a polysaccharide matrix. The polysaccharide component (with Tg of 50-150°C) forms a molecular cage that stabilizes the amorphous state, while the poorly water-soluble material provides the active ingredient. This composite approach achieves both improved solubility and simplified manufacturing compared to conventional methods.
2Reliability
If amorphous material is used to improve solubility, then absorbability in body is improved, but long-term stability and storage reliability deteriorate
Solution Approach 1:
The polysaccharide acts as an intermediary substance that mediates between the amorphous poorly water-soluble material and the storage environment. It forms a protective matrix around the amorphous material, restricting molecular mobility and preventing crystallization during storage, while allowing the material to maintain its amorphous state and high absorbability properties.
Solution Approach 2:
The invention utilizes parameter changes in the glass transition temperature of the polysaccharide matrix to control molecular mobility. By selecting polysaccharides with appropriate Tg ranges (50-150°C), the system maintains a rigid matrix structure at storage temperatures that prevents crystallization, while allowing amorphous state preservation that ensures high absorbability when administered.
3Measurement precision
If precise determination of crystalline and amorphous proportions is required, then quality evaluation accuracy is improved, but measurement complexity and time increase
Solution Approach 1:
The invention replaces complex mechanical or chemical analysis methods with X-ray diffraction (XRD) technology for determining crystalline and amorphous proportions. XRD provides rapid, non-destructive measurement that can quickly distinguish between crystalline and amorphous phases based on their characteristic diffraction patterns, significantly reducing measurement time while maintaining high precision.
Solution Approach 2:
The invention uses XRD to create a diffraction pattern 'copy' or fingerprint of the material's structural state. By analyzing the characteristic peaks and halos in the XRD pattern, one can rapidly determine the proportions of crystalline and amorphous material without time-consuming physical or chemical tests, achieving both speed and accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable amorphous poorly water-soluble material with long-term stability and allows for the accurate determination of the proportion of crystalline and amorphous materials, enhancing the quality evaluation of the composition.
Implementation Method 1
an XRD analysis value of the solid composition is 4.0% or less: provided that the XRD analysis value is a numerical value calculated according to the formula: {(S2)/((S1)+(S2))}×100(%) when an area of a halo peak in the range of 2θ=5 to 60° is represented by (S1) and an area of a sharp peak derived from a poorly water-soluble material in a crystalline state (1b) in a portion exceeding the halo peak is represented by (S2) in a chart obtained when the solid composition is analyzed by a powder X-ray diffractometer
Implementation Method 2
a method for producing the solid composition, including a step of heating and kneading a crystalline poorly water-soluble material (1b), HPMC (2), and a polysaccharide of 5 or more sugars (3) other than HPMC
Data Source
AI summary
The present invention provides a solid composition containing an amorphous poorly water-soluble material, and a method for producing the same. The solid composition of the present invention is a solid composition containing an amorphous poorly water-soluble material (1a), hydroxypropylmethyl cellulose (2), and one or more types of water-soluble polysaccharides (3) other than hydroxypropylmethyl cellulose, and is characterized in that an XRD analysis value of the solid composition is 4.0% or less.