Soy protein based adhesive and particleboard

• US 7,081,159 B2
• Filed: 03/17/2005
• Issued: 07/25/2006
• Est. Priority Date: 03/19/2004
• Status: Expired due to Fees

• Current Assignee: University of Southern Mississippi
• Original Assignee: University of Southern Mississippi
• Inventors: Shera, Jeanne N., Sankovich, Boris G., Thompson, Robert B., Thames, Shelby F., Evans, James M., Mendon, Sharathkumar K.
• Primary Examiner(s): BRUNSMAN, DAVID M
• Application Number:
  US11/083,118
• Publication Number:
  US 20050234156A1
• Time in Patent Office: 495 Days
• Field of Search: 106/137.7, 106/137.71, 106/123.12, 106/149.1, 106/156.23, 106/157.1
• US Class Current: 106/137.7
• CPC Class Codes: B27N 3/002 characterised by the type of binder compositions of macromolecular compounds C08L
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/26 Natural polymers, natural resins or derivatives thereof according to C08L1/00 - C08L5/00, C08L89/00, C08L93/00, C08L97/00 or C08L99/00
• CPC Class Codes: C08L 89/00 Compositions of proteins; Compositions of derivatives thereof foodstuff preparations A23J3/00
• CPC Class Codes: C08L 91/06 Waxes
• CPC Class Codes: C08L 97/005 Lignin
• CPC Class Codes: C08L 97/02 Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N
• CPC Class Codes: C09J 189/00 Adhesives based on proteins; Adhesives based on derivatives thereof
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material

Abstract

An adhesive composition that can be used in particleboards and other composites is formed from an aqueous mixture of soy protein, zinc sulfate heptahydrate, calcium oxide, sodium benzoate, pine oil, wax emulsion and non-sulfonated kraft lignin. In a second embodiment the composition further includes an acid.

Claims

1. An adhesive formulation comprising of a mixture of:

water;

zinc sulfate heptahydrate;

calcium oxide;

sodium benzoate;

pine oil;

soy protein;

wax emulsion; and

non-sulfonated kraft lignin.

2. The adhesive formulation of claim 1 wherein the soy protein is soy protein isolate.

3. The adhesive formulation of claim 1 wherein the soy protein is defatted soy flour.

4. The adhesive formulation of claim 1 further comprising an acid.

5. The adhesive formulation of claim 4 wherein the acid is nitric acid.

6. The adhesive formulation of claim 5 comprising 45–

80% water;

0.15–

0.25% zinc sulfate heptahydrate;

0.7–

1.6% calcium oxide;

1.0–

1.4% sodium benzoate;

0.30–

0.80% pine oil;

14–

25% soy protein isolate;

3.0–

5.0% wax emulsion;

1.0–

2.0% non-sulfonated kraft lignin, and 2.0–

4.0% nitric acid.

7. The adhesive formulation of claim 6 comprising 76.45% water;

0.15% zinc sulfate heptahydrate;

0.98% calcium oxide;

0.98% sodium benzoate;

0.53% pine oil;

14.65% soy protein isolate;

3.02% wax emulsion;

1.03% non-sulfonated kraft lignin, and 2.20% nitric acid.

8. The adhesive formulation of claim 6 comprising 70.36% water;

0.19% zinc sulfate heptahydrate;

1.24% calcium oxide;

1.24% sodium benzoate;

0.67% pine oil;

18.44% soy protein isolate;

3.81% wax emulsion;

1.30% non-sulfonated kraft lignin, and 2.77% nitric acid.

9. The adhesive formulation of claim 5 comprising 64.43% water;

0.22% zinc sulfate heptahydrate;

1.48% calcium oxide;

1.48% sodium benzoate;

0.80% pine oil;

22.13% soy protein isolate;

4.57% wax emulsion;

1.56% non-sulfonated kraft lignin, and 3.32% nitric acid.

10. The adhesive formulation of claim 1 comprising 50–

85% water;

0.10–

0.25% zinc sulfate heptahydrate;

0.7–

1.6% calcium oxide;

1.0–

1.4% sodium benzoate;

0.30–

0.75% pine oil;

14–

25% soy protein;

3.0–

4.2% wax emulsion; and

1.0–

1.5% non-sulfonated kraft lignin.

11. The adhesive formulation of claim 10 comprising 78.17% water;

0.15% zinc sulfate heptahydrate;

1.01% calcium oxide;

1.01% sodium benzoate;

0.54% pine oil;

14.98% soy protein isolate;

3.09% wax emulsion; and

1.06% non-sulfonated kraft lignin.

12. The adhesive formulation of claim 10 comprising 70.45% water;

0.20% zinc sulfate heptahydrate;

1.36% calcium oxide;

1.36% sodium benzoate;

0.73% pine oil;

20.28% soy protein isolate;

4.19% wax emulsion; and

1.43% non-sulfonated kraft lignin.

13. The adhesive formulation of claim 10 comprising 76.66% water;

0.17% zinc sulfate heptahydrate;

1.08% calcium oxide;

1.08% sodium benzoate;

0.59% pine oil;

16.08% soy protein isolate;

3.21% wax emulsion; and

1.13% non-sulfonated kraft lignin.

14. An adhesive formulation comprising of an aqueous mixture of:

a source of soy protein;

a crosslinker;

a hydrolyzation agent;

a preservative;

a defoamer;

a wax emulsion; and

a source of lignin.

15. The adhesive formulation of claim 14 further comprising an acid.

16. The adhesive formulation of claim 15 wherein the acid is nitric acid.

17. A particleboard comprising of:

a source of lignocellulose; and

a binder comprising a mixture of water, zinc sulfate heptahydrate, calcium oxide, sodium benzoate, pine oil, soy protein, wax emulsion and non-sulfonated kraft lignin.

18. The particleboard of claim 17 wherein the soy protein is soy protein isolate.

19. The particleboard of claim 17 wherein the soy protein is defatted soy flour.

20. The particleboard of claim 17 wherein the source of lignocellulose is wood furnish.

21. The particleboard of claim 17 wherein the binder is comprised of:

50–

85% water;

0.15–

0.25% zinc sulfate heptahydrate;

0.7–

1.6% calcium oxide;

1.0–

1.4% sodium benzoate;

0.30–

0.75% pine oil;

14–

25% soy protein isolate;

3.0–

4.2% wax emulsion; and

1.0–

1.5% non-sulfonated kraft lignin.

22. The particleboard of claim 21 wherein the binder is comprised of:

78.17% water;

0.15% zinc sulfate heptahydrate;

1.01% calcium oxide;

1.01% sodium benzoate;

0.54% pine oil;

14.98% soy protein isolate;

3.09% wax emulsion; and

1.06% non-sulfonated kraft lignin.

23. The particleboard of claim 21 wherein the binder is comprised of:

70.45% water;

0.20% zinc sulfate heptahydrate;

1.36% calcium oxide;

1.36% sodium benzoate;

0.73% pine oil;

20.28% soy protein isolate;

4.19% wax emulsion; and

1.43% non-sulfonated kraft lignin.

24. The particleboard of claim 21 wherein the binder is comprised of:

76.66% water;

0.17% zinc sulfate heptahydrate;

1.08% calcium oxide;

1.08% sodium benzoate;

0.59% pine oil;

16.08% soy protein isolate;

3.21% wax emulsion; and

1.13% non-sulfonated kraft lignin.

25. The particleboard of claim 17 wherein the binder further comprises an acid.

26. The particleboard of claim 25 wherein the acid is nitric acid.

27. The particleboard of claim 26 wherein the source of lignocellulose is wood furnish.

28. The particleboard of claim 26 wherein the binder is comprised of:

45–

80% water;

0.15–

0.25% zinc sulfate heptahydrate;

0.7–

1.6% calcium oxide;

1.0–

1.4% sodium benzoate;

0.30–

0.80% pine oil;

14–

25% soy protein isolate;

3.0–

5.0% wax emulsion;

1.0–

2.0% non-sulfonated kraft lignin, and 2.0–

4.0% nitric acid.

29. The particleboard of claim 28 wherein the binder is comprised of:

76.45% water;

0.15% zinc sulfate heptahydrate;

0.98% calcium oxide;

0.98% sodium benzoate;

0.53% pine oil;

14.65% soy protein isolate;

3.02% wax emulsion;

1.03% non-sulfonated kraft lignin, and 2.20% nitric acid.

30. The particleboard of claim 28 wherein the binder is comprised of:

70.36% water;

0.19% zinc sulfate heptahydrate;

1.24% calcium oxide;

1.24% sodium benzoate;

0.67% pine oil;

18.44% soy protein isolate;

3.81% wax emulsion;

1.30% non-sulfonated kraft lignin, and 2.77% nitric acid.

31. The particleboard of claim 28 wherein the binder is comprised of:

64.43% water;

0.22% zinc sulfate heptahydrate;

1.48% calcium oxide;

1.48% sodium benzoate;

0.80% pine oil;

22.13% soy protein isolate;

4.57% wax emulsion;

1.56% non-sulfonated kraft lignin, and 3.32% nitric acid.