Methods of use and processes for preparing alcoholic solutions of polyvinylpyridine polymers
Inventors
BOULOUSSA, Houssam • Bouloussa, Othman
Assignees
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Publication Number
US-11019819-B2
Publication Date
2021-06-01
Expiration Date
Abstract
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.
Core Innovation
The invention relates to a ready-to-use alcoholic solution of a partially quaternized polyvinylpyridine statistical copolymer. The solution remains stable during storage by preventing volume reticulation, and the polymer is specified as a polyvinylpyridine polymer of formula (I) or formula (II), wherein X is 12±2% to 45±2%. The alcoholic solution is configured for grafting onto activated surfaces.
A method is provided for controlling the growth of at least one of bacteria, fungi, and viruses by depositing and grafting the alcoholic solution comprising the polyvinylpyridine polymer onto an activated surface. Covalent grafting onto activated surfaces is described, including grafting using activated surface chemistries such as iodopropyltrimethoxysilane and chloromethylcatechol spacers. The grafted material is stated to impart biocidal activity together with biocompatibility.
The invention is also presented as a method of preventing digestion of a cellulosic compound by wood-boring insects by grafting the alcoholic solution comprising the polyvinylpyridine polymer on a surface comprising the cellulosic compound. The documented discussion includes proposed direct and indirect mechanisms for preventing digestion, including effects described in terms of interference with digestive enzymes such as cellulase and Cx-cellulase and C1-cellulase.
Claims Coverage
Two independent claims define methods centered on grafting an alcoholic solution containing a polyvinylpyridine polymer of formula (I) or formula (II) onto a surface, with X constrained to 12±2% to 45±2%. Each independent claim also assigns a specific intended outcome: controlling microbial/viral growth versus preventing digestion of cellulosic material by wood-boring insects.
Depositing and grafting an alcoholic solution on an activated surface for growth control
Depositing and grafting on an activated surface an alcoholic solution comprising a polyvinylpyridine polymer of formula (I) or formula (II), wherein X is 12±2% to 45±2%.
Grafting an alcoholic solution on a surface comprising a cellulosic compound to prevent digestion
Grafting an alcoholic solution comprising a polyvinylpyridine polymer of formula (I) or formula (II) on a surface comprising the cellulosic compound, wherein X is 12±2% to 45±2%.
Across both independent claims, the coverage centers on grafting an alcoholic solution containing the specified polyvinylpyridine polymer (formula (I) or formula (II)) onto a target surface, with X limited to 12±2% to 45±2%, to achieve either growth control of bacteria, fungi, and viruses or prevention of digestion of cellulosic compounds by wood-boring insects.
Stated Advantages
Stable during storage by preventing volume reticulation.
Imparts biocidal activity on grafted surfaces.
Provides biocompatibility of the grafted material.
Prevents digestion of a cellulosic compound by wood-boring insects.
Documented Applications
Preventing digestion of wood cellulose by wood-boring insects using grafted biocidal copolymer, including proposed direct and indirect mechanisms.
Controlling the growth of at least one of bacteria, fungi, and viruses by depositing and grafting the alcoholic polyvinylpyridine polymer on activated surfaces.
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