Biological biocide additives for polymers
OwnerJorma Antero Virtaneninventor
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Abstract
This invention pertains to a method of modifying biocides obtained from biological sources, namely polyphenols. The modified biocide may have protective groups to reduce or prevent the oxidation of these phenols. The protective groups may also control the rate of hydrolyzation with regards to biocide efficacy. This invention also includes a method wherein the modified biocide may be incorporated and stabilized into a substrate like plastic.
Claims27
A method of modifying a polyphenol for use as a biocide in a substrate, comprising the steps of:
- selecting at least one protective group;
- incorporating said protective group onto said polyphenol;
- and
- forming a modified polyphenol.
A method of modifying a phenol for use as a biocide, comprising the steps of:
- selecting at least one protective group;
- incorporating said protective group onto said phenol;
- forming a modified phenol;
- and
- polymerizing said modified phenol to form a modified polyphenol.
A method of modifying a polyphenol for use as a biocide in a plastic, comprising the steps of:
- selecting at least one protective group comprising at least one protective group of acyl, alkyl, silyl, phophoryl, phosphonyl, phosphoryl, sulfate, sulfite, arseno and sulfonyl groups;
- incorporating said at least one protective group onto said polyphenol comprised of at least one polyphenol of gallic acid, tannic acid, tannins, sequerins, lignin, and modifications of lignin;
- and
- forming a modified polyphenol,
- wherein said protective group and said modified polyphenol are selectively chosen to control the rate of oxidation of said polyphenol and to control the rate of hydrolysis of said protective group.
A composition for modifying a polyphenol for use as a biocide in a substrate comprising:
- a polyphenol comprising at least one polyphenol of gallic acid, tannic acid, tannins, sequerins, lignin, and modifications of said lignin;
- and
- a protective group comprising at least one protective group of acyl, alkyl, silyl, phophoryl, phosphonyl, phosphoryl, sulfate, sulfite, arseno and sulfonyl groups,
- wherein said polyphenol is modified by said protective group and forms a modified polyphenol.
Dependencies are inferred from the claim text.