Starch-containing compositions for use in imparting oil or grease resistance to paper
Herein disclosed is a composition containing a thinned starch having from about 0.1 wt % to about 10 wt % substitution with a hydrophobic substituent wherein, after cooking at from about 15% solids to about 30% solids, the composition has a viscosity of about 1000 cps at 35° C. Also disclosed herein is a paper product containing a substrate containing paper or paperboard and having a first surface and a second surface and a coating applied at least to substantially the entire first surface of the substrate, wherein the coating contains a thinned starch having from about 0.1 wt % to about 10 wt % substitution with a hydrophobic substituent wherein, after cooking at from about 15% solids to about 30% solids, the coating has a viscosity of about 1000 cps at 35° C., wherein the paper product contains from about 5 lb starch to about 500 lb starch per ton of substrate.
1. A composition, comprising:
a non-crosslinked thinned starch having from about 0.1 wt % to about 10 wt % substitution with a hydrophobic substituent,
wherein, after cooking at from about 15% solids to about 30% solids, the composition has a viscosity of about 1000 cps at 35° C., and
wherein the composition contains no added protein, sugars, or low-molecular-weight polyols.
2. The composition of claim 1 , wherein the starch is waxy corn starch.
3. The composition of claim 1 , wherein the starch has from about 2 wt % to about 4 wt % substitution with a hydrophobic substituent.
4. The composition of claim 3 , wherein the hydrophobic substituent is an alkenylsuccinate.
5. The composition of claim 4 , wherein the alkenylsuccinate is octenylsuccinate.
6. The composition of claim 1 , wherein, after cooking at from about 18% solids to about 28% solids, the composition has a viscosity of about 1000 cps at 35° C.
7. The composition of claim 1 , further characterized in being an aqueous paste having from about 5 wt % to about 30 wt % dry solids and a viscosity from about 20 cps to about 300 cps at a temperature from about 50° C. to about 60° C.
8. The composition of claim 7 , wherein the aqueous paste has from about 8 wt % to about 15 wt % dry solids and a viscosity from about 50 cps to about 150 cps at a temperature from about 50° C. to about 60° C.
9. A paper product, comprising:
a substrate containing paper or paperboard and having a first surface and a second surface, and
a coating applied at least to substantially the entire first surface of the substrate, wherein the coating contains a non-crosslinked thinned starch having from about 0.1 wt % to about 10 wt % substitution with a hydrophobic substituent wherein, after cooking at from about 15% solids to about 30% solids, the coating has a viscosity of about 1000 cps at 35° C., wherein the coating contains no added protein, sugars, or low-molecular-weight polyols, and wherein the paper product contains from about 5 lb starch to about 500 lb starch per ton of substrate.
10. The paper product of claim 9 , wherein the starch is waxy corn starch.
11. The paper product of claim 9 , wherein the starch has from about 2 wt % to about 4 wt % substitution with a hydrophobic substituent.
12. The paper product of claim 11 , wherein the hydrophobic substituent is an alkenylsuccinate.
13. The paper product of claim 12 , wherein the alkenylsuccinate is octenylsuccinate.
14. The paper product of claim 9 , wherein, after cooking at from about 18% solids to about 28% solids, the composition has a viscosity of about 1000 cps at 35° C.
15. The paper product of claim 9 , wherein the substrate is paperboard.
16. The paper product of claim 9 , wherein the paper product is in the form of a package that contains an oily or greasy food and the coating stands between the oily or greasy food and the substrate.
17. The paper product of claim 16 , wherein the oily or greasy food is selected from the group consisting of pet food, microwaveable popcorn, pizza, fried potatoes, fried vegetables, pastries, chocolate bars, and foods containing an oil-based sauce.