Underwater bonding with a biobased adhesive
AssigneePurdue Research Foundation
InventorsJonathan J. WILKER, Gudrun SCHMIDT, Logan Joseph MILES
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Abstract
Underwater adhesive compositions comprising a zein and a tannic acid, alone or further in combination with FeCl3, an inorganic filler, a natural polymer, or any combination thereof; and a method of making them.
Claims21
An underwater adhesive composition comprising (i) a zein, and (ii) a tannic acid, wherein the composition comprises about 30-80 wt % of tannic acid.
An underwater adhesive composition comprising (i) a zein, (ii) a tannic acid, and (iii) an inorganic filler, a natural polymer, or both inorganic filler and a natural polymer.
11-14. (canceled)
20-27. (canceled)
A method of preparing an underwater adhesive composition comprising a zein and a tannic acid, which method comprises:
- a. mixing a zein stock solution with a tannic acid, in the presence of alcohol to obtain a highly viscous formulation;
- b. adjusting the pH to about 8-11;
- and
- c. mixing the highly viscous formulation with an inorganic filler, a natural polymer, or a combination thereof in the presence of alcohol to obtain a coacervate or a paste or a putty-like adhesive composition.
Dependencies are inferred from the claim text.