National Starch and Chemical Investment Holding Corporation

National Starch and Chemical Corporation

Craig H Leake

Michael T Foran

Michael Timothy Philbin

James L Eden

Paul A Altieri

James J Kasica

Peter T Trzasko

Jeffrey G Atkinson

Norman L Lacourse

Martin M Tessler

Carmine P Iovine

Robert L Billmers

John J Tsai

Roger Jeffcoat

Eric A Meier

Robert H Williams

David M Del Giudice

Michael A Silano

John E Fannon

A water resistant, starch-based, alkaline corrugating adhesive is provided having improved tack or runnability and comprises using a chemically treated or modified high amylose starch having at least 40% by weight amylose content as the raw starch component.

Water resistant high amylose corrugating adhesive with improved

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.

All natural, starch-based, water resistant corrugating adhesive

Corrugating adhesive compositions comprising soluble high amylose starch as the carrier starch may be prepared as a one-piece, dry mixture that can be dispersed in water at 25.degree. to 55.degree. C. and applied to paperboard without further preparation steps. The corrugating adhesives may be prepared without alkali, and used at any pH.

Corrugating adhesive containing soluble high amylose starch

A water resistant, starch-based alkaline corrugating adhesive which includes a polysaccharide graft copolymer containing a reactive aminoethyl halide group.

Water resistant alkaline corrugating adhesive composition and paperboard

This invention presents starch-based alkaline corrugating adhesives having improved green bond strength due to the use of undried starch as the raw starch component in the adhesive. Such adhesives can be used in corrugation processes at much higher corrugator running speeds than the conventionally employed adhesives.

Process of using starch based corrugating adhesives

Starch based corrugating adhesives

Alkaline-curing, starch-based corrugating adhesives employing ungelatinized tapioca starch and a carrier comprising high amylose starch, wherein the total solids of the adhesive is from 30 to 45% solids by weight, are disclosed. Said adhesives provide improved tack and corrugator running speeds.

High solids corrugating adhesive

Polysaccharide aldehydes having the formula ##STR1## or Sacch--O--CH.sub.2 --Ar--CHO (II) such as starch, cellulose, and gum aldehydes, are useful as paper additives for imparting strength and as the granular or gelatinized portion of a corrugating adhesive. Those having formula I are prepared by a nonoxidative method which involves reacting the polysaccharide base, in the presence of alkali, with a derivatizing acetal reagent having the general structure ##STR2## and then hydrolyzing the acetal by adjusting the pH to less than 7, preferably 2-4. In the formula Ar is an aryl group, optionally containing an ether linkage, or an alkaryl group and A and A' are lower alkyls or together form at least a 5-membered cyclic acetal. The polysaccharide aldehydes are crosslinked by the addition of selected polyfunctional crosslinkers such as an aliphatic primary polyamine or polyketone.

Polysaccharide derivatives containing aldehyde groups on an aromatic

A starch-based alkaline curing adhesive is disclosed. The adhesive, when employed in the preparation of corrugated paperboard provides the paperboard with superior water resistant bonds. The adhesive contains from about 6 to 35%, based on total weight of the adhesive, solids basis, of a latex polymer of a halohydrin quaternary ammonium monomer.

Water-resistant alkaline adhesive composition

A corrugating adhesive composition which exhibits superior tack performance is obtained by replacing, on a solids basis, from 5 to 100%, by weight, of the gelatinized starch carrier of a typical known starch-corrugating adhesive with a polymer containing at least 10%, by weight, of carboxyl groups derived from a polymerizable ethylenically unsaturated mono- or polycarboxylic acid or a mixture of these polymers.

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Edison, NJ, United States of America

Craig H Leake