Affinity Chromatography Filler Copolymer Alkali Resistance
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Solution Overview
Problem
Current fillers for affinity chromatography face challenges such as low dynamic binding capacity, poor alkali resistance, and storage stability, particularly with agarose particles experiencing increased column pressure and inconsistent quality, and copolymer particles having low hydrophilicity and ligand activity.
Innovation Solution
A filler composed of porous particles formed from a copolymer of specific vinyl monomers, including a methacryloyl group-containing vinyl monomer with a hydroxyl group, an epoxy group-containing vinyl monomer, and other vinyl monomers, which provides high dynamic binding capacity and alkali resistance by incorporating a ring-opened epoxy group and a ligand like an alkali-resistant immunoglobulin binding protein.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If agarose particles are used as the solid phase carrier, then high hydrophilicity and high ligand activity are achieved, but column pressure increases and product quality consistency deteriorates
Solution Approach 1:
The invention changes the material parameters of the solid phase carrier from natural agarose to synthetic copolymer particles with controlled composition (styrene-divinylbenzene 70-95 mass%, hydroxyl group-containing crosslinkable vinyl monomer 5-30 mass%). This parameter change maintains hydrophilicity through the crosslinkable monomer while improving mechanical strength to reduce column pressure increases.
2Reliability
If agarose particles are used as the solid phase carrier, then high hydrophilicity and high ligand activity are achieved, but product quality consistency deteriorates
Solution Approach 1:
The invention replaces natural agarose with a synthetic copolymer that copies the essential functional property (hydrophilicity) through controlled composition of hydroxyl group-containing monomers. This synthetic copying approach eliminates variability inherent in natural product extraction, achieving consistent product quality across batches.
3Stability of the object's composition
If porous particles consisting of copolymer of styrene-divinylbenzene are used, then excellent alkali resistance is achieved, but hydrophilicity and ligand activity decrease
Solution Approach 1:
The invention creates a composite particle system combining styrene-divinylbenzene (providing alkali resistance) with hydroxyl group-containing crosslinkable vinyl monomer (providing hydrophilicity). The composite structure integrates the advantages of both materials: the synthetic polymer matrix ensures chemical stability while the hydroxyl-functionalized components provide water affinity and ligand binding capability.
4Adaptability or versatility
If porous particles consisting of polymer of hydroxyl group-containing crosslinkable vinyl monomer are used, then gel filtration or reverse phase chromatography is enabled, but high dynamic binding capacity and storage stability cannot be balanced
Solution Approach 1:
The invention applies local quality differentiation within the particle structure: the styrene-divinylbenzene matrix provides the structural framework for alkali resistance and mechanical stability, while the hydroxyl group-containing crosslinkable vinyl monomer creates localized hydrophilic regions that enable ligand binding and appropriate chromatographic behavior. This spatial differentiation of properties allows simultaneous achievement of storage stability and functional performance.
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 filler exhibits enhanced dynamic binding capacity, alkali resistance, and storage stability, enabling efficient and cost-effective purification of immunoglobulins with reduced ligand activity loss even after repeated use.
Implementation Method 1
porous particles consisting of a copolymer of a vinyl monomer such as styrene-divinylbenzene generally have excellent alkali resistance, but due to their low hydrophilicity, the porous particles impart low ligand activity
Implementation Method 2
0.5 parts to 30 parts by mass of (M-2) an epoxy group-containing vinyl monomer
Data Source
AI summary
Provided is a filler for affinity chromatography having a high dynamic binding capacity for proteins and having excellent alkali resistance and storage stability. The filler for affinity chromatography of the present invention comprises a porous particle consisting of a copolymer of 40 parts to 99.5 parts by mass of (M-1) a methacryloyl group-containing vinyl monomer that contains a hydroxyl group and does not contain an epoxy group, 0.5 parts to 30 parts by mass of (M-2) an epoxy group-containing vinyl monomer, 0 parts to 59.5 parts by mass of (M-3) a methacryloyl group-containing vinyl monomer which is other than the monomers (M-1) and (M-2), and 0 parts to 25 parts by mass of (M-4) a vinyl monomer other than the monomers (M-1), (M-2) and (M-3) (with the proviso that the total amount of the contents of (M-1), (M-2), (M-3) and (M-4) is 100 parts by mass); ring-opened epoxy group obtainable by ring-opening of epoxy group that is contained in the copolymer; and ligand that is bound to the porous particle.