Polyvinyl Alcohol Copolymer Base for Solvent-Free Solid Dispersion
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Solution Overview
Problem
Existing methods for producing solid dispersions of poorly soluble components often require organic solvents, which are environmentally harmful, and lack a desirable base that effectively improves the solvability and stability of these components during heat treatment.
Innovation Solution
A polyvinyl alcohol-based copolymer, specifically formed by copolymerizing polyvinyl alcohols with acrylic acid and methylmethacrylate monomers, is used as a base for solid dispersion, which is mixed with poorly soluble components and heated using methods like ultrasonic treatment to enhance solvability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the solvent method is used to produce solid dispersions, then the dissolvability of poorly soluble medicament is improved, but the environment is adversely affected due to organic solvent usage
Solution Approach 1:
The invention extracts and eliminates the organic solvent from the solid dispersion production process, replacing it with a water-based or solvent-free system. The poorly soluble medicament is dispersed directly in a water-soluble polymer base without requiring organic solvents, thus maintaining improved dissolvability while removing the harmful environmental factor associated with organic solvent usage.
Solution Approach 2:
The invention changes the fundamental parameter of the dispersion medium from organic solvent to water or water-soluble polymer. By altering the solvent type parameter, the process achieves both improved dissolvability of the medicament and elimination of environmental harm, as water and water-soluble polymers are environmentally benign compared to organic solvents.
2Object-affected harmful factors
If conventional bases for solid dispersion (PVP, HPMC, PVA) are used in dry methods, then the process avoids organic solvents, but the temperature during heat treatment and degree of improvement in dissolvability are insufficient
Solution Approach 1:
The invention uses a composite base material system consisting of a water-soluble polymer (such as PVA, HPMC, or PVP) combined with specific additives or modified structures. This composite approach enhances the base material's ability to improve dissolvability while maintaining compatibility with dry process methods and avoiding organic solvents. The composite structure provides both the necessary thermal stability and enhanced dissolvability properties.
3Ease of manufacture
If direct heating method is used to make medicament amorphous, then the process is simple, but the temperature control and stability during heat treatment are challenging
Solution Approach 1:
The invention introduces a water-soluble polymer base as an intermediary medium between the heating process and the medicament. This intermediary polymer matrix absorbs and distributes thermal energy uniformly, preventing localized overheating and decomposition. The polymer acts as a thermal buffer that maintains stable temperature conditions during heat treatment while still achieving the desired amorphous transformation of the medicament.
Solution Approach 2:
The invention changes the heating parameters by using controlled, gradual heating in the presence of a water-soluble polymer base rather than rapid direct heating. This parameter change in the heating rate and temperature profile, combined with the polymer's thermal properties, maintains composition stability during heat treatment while preserving process simplicity.
4Temperature
If ultrasonic irradiation is used to make medicament amorphous, then the medicament can be made amorphous without high temperature, but the energy consumption and process complexity increase
Solution Approach 1:
The water-soluble polymer base acts as an intermediary that facilitates amorphous transformation at lower temperatures. The polymer matrix enables energy-efficient ultrasonic processing by providing a medium in which ultrasonic waves can effectively generate the necessary mechanical energy for amorphization without requiring excessive energy input. The polymer absorbs and distributes ultrasonic energy uniformly, improving energy efficiency.
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 resulting solid dispersion exhibits improved solvability and bioavailability of poorly soluble components, with the polyvinyl alcohol-based copolymer effectively making a part or whole of the component amorphous, suitable for various applications including pharmaceuticals and agricultural chemicals.
Implementation Method 1
a solid dispersion having an excellent ability in dissolving poorly soluble components can be obtained by using a polyvinyl alcohol-based copolymer as a base for solid dispersion and mixing and heating it with a poorly soluble component
Implementation Method 2
heating with ultrasonic waves, heat transmission, etc.
Implementation Method 3
mixing and heating it with a poorly soluble component
Implementation Method 4
Solid dispersions are expected to improve the dissolvability of the poorly soluble medicament so as to enhance its bioavailability
Implementation Method 5
a solid dispersion having an excellent ability in dissolving poorly soluble components
Data Source
AI summary
The present invention provides a novel base material for a dry solid dispersion, a solid dispersion containing the base material, and a composition containing the dispersion; the solid dispersion of the present invention, which contains a poorly soluble component with improved dissolvability, can be obtained by mixing a polyvinyl alcohol-based copolymer, as a base material for the dry solid dispersion, with a poorly soluble component, and then heating it.