Adhesive
AssigneeNew Zealand Forest Research Institute Limited
InventorWarren James Grigsby
Life of this patent
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Abstract
An aqueous adhesive composition and a process for preparing such compositions are disclosed. The composition comprises macromolecular complex comprising (A) a first component comprising (i) a framework element and (ii) a polyphenol, and (B) second component comprising a polypeptide, oligopeptide, amino acid, or polyamine. The framework element comprises (a) a polypeptide, oligopeptide, amino acid, or polyamine, (b) a polysaccharide, oligosaccharide, or monosaccharide, or a saccharide conjugate, or (c) a lignin, a lignan or a lignin conjugate. The polyphenol comprises a tannin, a tannic acid, a flavonoid, or a poly-resorcinol. An adhesive precursor composition comprising the first component is also disclosed.
Claims29
An aqueous adhesive composition comprising a macromolecular complex, the complex comprising:
- (A) a first component comprising:
- (i) a framework element selected from
- (a) a polypeptide, oligopeptide, amino acid, polyamine, or any combination of any two or more thereof,
- (b) a polysaccharide, oligosaccharide, monosaccharide, or any combination of any two or more thereof, or a saccharide conjugate comprising a polysaccharide, oligosaccharide, monosaccharide, or any combination of any two or more thereof and a first linker molecule, or
- (c) a lignin, a lignan or a lignin conjugate comprising a lignin and a second linker molecule;
- and
- (ii) a polyphenol comprising a tannin, a tannic acid, a flavonoid, a poly-resorcinol or any combination of any two or more thereof;
- and
- (B) a second component comprising a polypeptide, oligopeptide, amino acid, polyamine or any combination of any two or more thereof;
- wherein the ratio of framework element to polyphenol is from about 20:1 to about 1:1 by dry weight;
- and
- wherein the ratio of polyphenol to second component is from about 1:1 to about 1:8 by dry weight.
A process for producing an aqueous adhesive composition comprising a macromolecular complex, the process comprising:
- (1) providing an aqueous composition comprising a first component, the first component comprising:
- (i) a framework element selected from
- (a) a polypeptide, oligopeptide, amino acid, polyamine, or any combination of any two or more thereof,
- (b) a polysaccharide, oligosaccharide, monosaccharide, or any combination of any two or more thereof, or a saccharide conjugate comprising a polysaccharide, oligosaccharide, monosaccharide, or any combination of any two or more thereof and a first linker molecule, or
- (c) a lignin, a lignan or a lignin conjugate comprising a lignin and a second linker molecule;
- and
- (ii) a polyphenol comprising a tannin, a tannic acid, a flavonoid, a poly-resorcinol or any combination of any two or more thereof;
- and
- (2) admixing a second component comprising a polypeptide, oligopeptide, amino acid, polyamine, or any combination of any two or more thereof to form a macromolecular complex;
- wherein the ratio of framework element to polyphenol is from about 20:1 to about 1:1 by dry weight;
- and
- wherein the ratio of polyphenol to second component is from about 1:1 to about 1:8 by dry weight.
Dependencies are inferred from the claim text.