Alcoholic Polyvinylpyridine Solution for Reticulation-Stable Biocidal Grafting
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Solution Overview
Problem
Existing biocidal polymers face challenges in maintaining biocidal and biocompatibility properties during prolonged storage, often leading to rapid reticulation in volume, which limits their practical application.
Innovation Solution
A ready-to-use alcoholic solution of a partially quaternized polyvinylpyridine polymer is prepared by reacting polyvinylpyridine with specific monomers in an alcoholic solvent for a controlled reaction period, achieving a specific N+N ratio, which stabilizes the solution and prevents reticulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If biocidal polymers are prepared in solution form for prolonged storage, then biocidal and biocompatibility properties are maintained, but reticulation in volume occurs rapidly
Solution Approach 1:
The patent applies parameter changes by carefully controlling the quaternization degree of polyvinylpyridine (maintaining unquaternized pyridine rings) and using specific monomer ratios (5% monomer A) to achieve a stable alcoholic solution that prevents rapid reticulation while maintaining biocidal activity and biocompatibility during prolonged storage
Solution Approach 2:
The patent creates a composite polymer structure by copolymerizing polyvinylpyridine with two different monomers (monomer A and monomer B) in specific proportions, resulting in a statistical copolymer that combines biocidal properties with enhanced storage stability and controlled reticulation behavior
2Ease of manufacture
If biocidal polymers are made ready-to-use with prolonged storage capability, then practical application is improved, but spontaneous volume reticulation increases
Solution Approach 1:
The patent optimizes chemical parameters including the quaternization degree of PVP, the ratio of monomer A (5%), and the selection of alcoholic solvent to create a ready-to-use solution that maintains composition stability and prevents spontaneous reticulation during storage while preserving biocidal and biocompatibility properties
3Reliability
If polyvinylpyridine is quaternized to achieve biocidal activity, then biocidal properties are enhanced, but solution stability decreases and reticulation occurs
Solution Approach 1:
The patent achieves the optimal balance by controlling the quaternization degree of polyvinylpyridine to maintain sufficient unquaternized pyridine rings, which prevents excessive cross-linking and reticulation while preserving biocidal activity through the quaternized portions, and further stabilizes the solution by incorporating 5% monomer A
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 maintains biocidal and biocompatible properties over a prolonged storage period, effectively preventing reticulation and ensuring stability, suitable for various surfaces including medical and industrial applications.
Implementation Method 1
reacting polyvinylpyridine (PVP), monomer A and monomer B in an alcoholic solution for a reaction period to prepare a statistical copolymer
Data Source
AI summary
Provided is a process for preparing an alcoholic solution of a polyvinylpyridine polymer having biocidal and biocompatibility properties. The alcoholic solution is ready-to-graft in order to confer biocidal properties to various surfaces and to prevent biofilm formation on such surfaces. Also provided are methods of using the alcoholic solution, such as for controlling the growth of bacteria, fungi and/or viruses, and/or for preventing digestion of wood cellulose by wood-boring insects.