All natural, starch-based, water resistant corrugating adhesive
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsCraig H. Leake, Michael T. Foran, Roger Jeffcoat, Michael T. Philbin, John E. Fannon
Life of this patent
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Abstract
An all natural, starch-based, alkaline corrugating adhesive free of formaldehyde and other crosslinking and water resistance additives and having good water resistant properties comprising an aqueous dispersion of a gelatinized carrier starch and a raw ungelatinized starch wherein the carrier starch has a total amylose content of greater than 60% by weight and the gelatinized starch amylose content is at least about 15% by weight of the total starch content in the adhesive.
Claims33
A water resistant starch alkaline corrugating adhesive composition free of formaldehyde and other crosslinking and water resistance additives and comprising an aqueous dispersion of a gelatinized carrier starch and a raw ungelatinized starch wherein the carrier starch is a high amylose starch having greater than 60% by weight of total amylose content and the gelatinized starch amylose content is at least about 15% by weight of the total starch content in the adhesive.
A water resistant starch alkaline corrugating adhesive composition free of formaldehyde and other crosslinking and water resistance additives comprising an ungelatinized starch which contains high amylose starch having greater than 60% by weight of total amylose content and present in sufficient amount to provide at least 15% by weight of amylose content based on the total starch content in the adhesive.
A water resistant starch alkaline curing corrugating adhesive comprising:
- a. from about 10 to 50% by weight, based on the weight of the composition of starch including the ungelatinized raw and gelatinized carrier portions of the starch,
- b. from about 0.3 to 5% by weight, based on the weight of the starch, of an alkali, and
- c. from about 40 to 90% by weight, based on the weight of the composition of water,
- wherein the gelatinized carrier starch is a high amylose starch having greater than 60% by weight of total amylose content and the gelatinized starch amylose content is at least about 15% by weight of the total starch content in the adhesive.
A water resistant starch alkaline curing corrugating adhesive comprising:
- a. from about 10 to 50% by weight, based on the weight of the composition of ungelatinized starch,
- b. from about 0.3 to 5% by weight, based on the weight of the starch, of an alkali, and
- c. from about 40 to 90% by weight, based on the weight of the composition of water,
- wherein the ungelatinized starch is high amylose starch having greater than 60% by weight of total amylose and is present in sufficient amount to provide at least 15% by weight of amylose content based on the total weight of starch.
Dependencies are inferred from the claim text.