Soy protein and carbohydrate containing binder compositions
Soy protein and carbohydrate containing binder compositions are described. The binder compositions may include a carbohydrate, a nitrogen-containing compound, and a soy protein. The binder compositions may also optionally include thickening agents such as modified celluloses and polysaccharides.
1. A soy-containing binder composition comprising:
a reaction product of a urea compound and a dialdehyde compound;
a soy protein, wherein the soy protein is chosen from the group consisting of soy flour, defatted soy flour, soy protein concentrate, soy protein isolate, and soy polymer;
a curing catalyst; and
dextrose that is provided independently of the soy protein, and
wherein a molar ratio of the reaction product of the urea compound and the dialdehyde compound to the dextrose is 1:2 to 1:50, and
wherein the soy-containing binder composition is formaldehyde-free.
2. The soy-containing binder composition of claim 1 , wherein the soy protein is soy flour.
3. The soy-containing binder composition of claim 1 , wherein the soy protein comprises 0.5 wt. % to 75 wt. % of the binder composition.
4. The soy-containing binder composition of claim 1 , wherein the soy protein comprises 20 wt. % to 50 wt. % of the binder composition.
5. The soy-containing binder composition of claim 1 , wherein the reaction product comprises 4,5-dihydroxyimidazolidin-2-one.
6. The soy-containing binder composition of claim 1 , wherein the binder composition further comprises a reaction product of an organic anhydride and an alkanol amine.
7. The soy-containing binder composition of claim 1 , wherein the binder composition further comprises a thickening agent.
8. The soy-containing binder composition of claim 7 , wherein the thickening agent comprises a modified cellulose.
9. The soy-containing binder composition of claim 8 , wherein the modified cellulose is chosen from carboxymethyl cellulose and hydroxyethyl cellulose.
10. The soy-containing binder composition of claim 7 , wherein the thickening agent comprises a polysaccharide.
11. The soy-containing binder composition of claim 10 , wherein the polysaccharide is chosen from xanthan gum, guar gum, and starch.
12. The soy-containing binder composition of claim 1 , wherein the urea compound has a formula:
wherein R 1 , R 2 , R 3 , and R 4 are independently chosen from a hydrogen moiety (H), an alkyl group, an aromatic group, an alcohol group, a ketone group, a carboxylic acid group, an alkoxy group.
13. The soy-containing binder composition of claim 1 , wherein the urea compound comprises urea and the dialdehyde compound comprises glyoxal.
14. The soy-containing binder composition of claim 1 , wherein a pH of the soy-containing binder composition ranges from 6 to 8.
15. The soy-containing binder composition of claim 1 , wherein the soy-containing binder composition has a solids concentration of 10 wt. % to 30 wt. %.
16. A blended soy-containing binder composition comprising:
dextrose,
a reaction product of a urea compound and an aldehyde-containing compound having the formula:
wherein R 7 , R 8 , R 9 , and R 10 are independently chosen from a hydrogen moiety (H), an alkyl group, an aromatic group, an alcohol group, a ketone group, a carboxylic acid group, an alkoxy group, and wherein at least one of R 7 , R 8 , R 9 , and R 10 is an alcohol group,
a soy protein added independently of the dextrose, and
a curing catalyst,
wherein the soy-containing binder composition is formaldehyde-free.
17. The blended soy-containing binder composition of claim 16 , wherein the soy protein is soy flour.
18. The blended soy-containing binder composition of claim 16 , wherein the soy protein comprises 0.5 wt. % to 75 wt. % of the binder composition.
19. The blended soy-containing binder composition of claim 16 , wherein the soy protein comprises 20 wt. % to 50 wt. % of the binder composition.
20. The blended soy-containing binder composition of claim 16 , wherein the curing catalyst comprises a Lewis acid.
21. The blended soy-containing binder composition of claim 16 , wherein the binder composition further comprises a thickening agent.
22. The blended soy-containing binder composition of claim 16 , wherein a pH of the blended soy-containing binder composition ranges from 6 to 8.
23. The blended soy-containing binder composition of claim 16 , wherein the blended soy-containing binder composition has a solids concentration of 10 wt. % to 30 wt. %.