Latex based adhesive composition containing ammonium zirconium carbonate for the enhancement of hot, green bond adhesive properties of paperboard and corrugated board

DETAILED DESCRIPTION What is claimed is: 1.
An aqueous adhesive consisting essentially of: (a) starch present in an amount of from about 20 to about 95 dry parts per hundred parts dry adhesive: and (b) an ammonium-based latex in an amount of from about 80 to about 5 dry parts per hundred parts dry adhesive: and (b) ammonium zirconium carbonate present in the aqueous adhesive in an amount of from about 0.
1 to about 10 parts (expressed as ZrO.
sub.
2) per 100 parts of latex solids.
2.
The adhesive of claim 1 wherein said latex is an isopropenyl-2-oxazoline-modified polymer latex.
3.
The adhesive of claim 1 wherein the ammonium-based latex is selected from the group consisting of styrene-butadiene polymer latex or carboxylated styrene-butadiene polymer latex.
4.
The adhesive of claim 1 wherein said latex is an isopropenyl-2-oxazoline-modified styrene-butadiene polymer latex.
5.
The adhesive of claim 4 wherein said isopropenyl-2-oxazoline is present in an amount of from about 0.
25 to about 10 parts by weight based on 100 parts polymer latex.
6.
The adhesive of claim 4 wherein said isopropenyl-2-oxazoline is present in an amount of from about 1 to about 2 parts by weight based on 100 parts polymer latex.
7.
The adhesive of claim 1 wherein the ammonium zirconium carbonate (expressed as ZrO.
sub.
2) is present in the aqueous adhesive in an amount of from about 0.
5 to about 5.
0 parts per 100 parts of latex solids.




Description:
EXAMPLE 1 Into a one-gallon, jacketed reactor equipped with lab pumps to deliver monomer and aqueous feeds are added 1088.
05 g of deionized water, 14.
77 g of a one-percent active aqueous pentasodium diethylene triamine pentacetate solution, 29.
53 g of itaconic acid and 26.
18 g of a 39.
7 percent solids seed latex containing polystyrene particles having a volume average particle size of about 270.
ANG.
.
The reactor is purged with nitrogen and heated to 90.
degree.
C.
Then, over a two hour and 40 minute period is added a monomer stream containing 590.
63 g of styrene and 5