Paper sizing composition with salt of calcium (II) and organic acid, products made thereby, method of using, and method of making
A paper sizing composition is provided, which comprises a water-soluble salt of Ca(II) and at least one organic acid; and starch. Methods of making and using the composition, and methods of making and using the recording sheets which include the composition, are disclosed.
1. A paper, sizing composition, comprising:
a water-soluble salt of Ca(II) and at least one organic acid; and
starch,
wherein the salt is not calcium acetate calcium formate or calcium stearate.
2. The composition of claim 1 , wherein said salt is present in an amount ranging from 0.1 to 50% by weight of the sizing composition.
3. The composition of claim 1 , wherein the salt has a water solubility of greater than 0.002 grams salt/100 cc of water, at 25° C.
4. The composition of claim 1 , wherein the organic acid has the formula RCOOH, wherein R is a hydrocarbon having 2-16 or 18-30 carbon atoms.
5. The composition of claim 1 , wherein the organic acid is zwitterionic or amphoteric.
6. The composition of claim 1 , wherein the salt is a salt having two identical organic acids.
7. The composition of claim 1 , wherein the salt is a complex salt having two or more different organic acids.
8. The composition of claim 1 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, calcium EDTA, calcium DTPA, or a mixture thereof.
9. The composition of claim 1 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, or a mixture thereof.
10. The composition of claim 1 , wherein the starch is present in an amount ranging from 0.1 to 75% by weight of the sizing composition.
11. The composition of claim 1 , which further comprises an optical brightening agent.
12. A method for making the composition of claim 1 , comprising contacting
a water-soluble salt of Ca(II) and at least one organic acid; and
starch;
to produce the composition of claim 1 .
13. A recording sheet, comprising:
a paper substrate, comprising:
a plurality of cellulosic fibers; and
a paper sizing composition, comprising:
a water-soluble salt of Ca(II) and at least one organic acid; and
starch;
wherein the salt is not calcium acetate calcium formate or calcium stearate.
14. The recording sheet of claim 13 , wherein the water soluble Ca(II) salt of the organic acid is present in an amount ranging, from about 2 to about 100 lbs Ca(II) salt/ton of paper.
15. The recording sheet of claim 13 , wherein the water soluble Ca(II) salt is present in an amount ranging from about 0.02 g/m 2 to about 4 g/m 2 .
16. The recording sheet of claim 13 , wherein the starch is present in an amount ranging from about 5 to about 300 lbs/ton.
17. The recording sheet of claim 13 , wherein the dry pickup of the sizing composition ranges from 0.25 to 8 gsm.
18. The recording sheet of claim 13 , wherein the sizing composition is an internal sizing.
19. The recording sheet of claim 13 , wherein the sizing composition is an external sizing.
20. The recording sheet of claim 13 , wherein the sizing composition is an internal and an external sizing.
21. The recording sheet of claim 13 , comprising a printed image thereon.
22. A method for making a recording sheet, comprising:
contacting:
a paper substrate comprising a plurality of cellulosic fibers; and
a composition, comprising:
a water-soluble salt of Ca(II) and at least one organic acid; and
starch;
to produce a recording sheet;
wherein the salt is not calcium acetate calcium formate or calcium stearate.
23. A method, comprising forming an image with a printing apparatus on a surface of a recording sheet, said recording sheet comprising:
a paper substrate comprising:
a plurality of cellulosic fibers; and
a composition, comprising:
a water-soluble salt of Ca(II) and at least one organic acid; and
starch;
wherein the salt is not calcium acetate calcium formate or calcium stearate.
24. The recording sheet of claim 13 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, calcium EDTA, calcium DTPA, or a mixture thereof.
25. The recording sheet of claim 13 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, or a mixture thereof.
26. The method of claim 22 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, calcium EDTA, calcium DTPA, or a mixture, thereof.
27. The method of claim 22 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, or a mixture thereof.
28. The method of claim 23 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, calcium EDTA, calcium DTPA, or a mixture thereof.
29. The method of claim 23 , wherein the salt is calcium propionate, calcium lactate, calcium tartrate, calcium gluconate, calcium citrate, calcium lactate gluconate, calcium 2-ethylbutanoate, or a mixture thereof.
30. The composition of claim 1 , wherein said salt is present in an amount ranging from 0.1 to 45% by weight of the sizing composition.
31. The composition of claim 1 , wherein the organic acid has more than one carboxylic acid group.
32. The composition of claim 4 , wherein one or more of the carbons in the hydrocarbon R group is substituted with one or more N, S, O, or P.
33. The composition of claim 4 , wherein the hydrocarbon R group is a saturated, monounsaturated, or polyunsaturated C2-C5 alkyl, C1-C5 hydroxyalkyl, or phenyl group.