Bio-based binder systems

• US 10,030,177 B2
• Filed: 10/07/2016
• Issued: 07/24/2018
• Est. Priority Date: 05/27/2011
• Status: Active Grant

• Current Assignee: Cargill, Inc. (Agricultural Services Division)
• Original Assignee: Cargill, Inc. (Agricultural Services Division)
• Inventors: Lochel, Jr., Frank P., Tolfa, John Carl
• Primary Examiner(s): Mayes, Melvin C.
• Assistant Examiner(s): NGUYEN, COLETTE B
• Application Number:
  US15/288,334
• Publication Number:
  US 20170022398A1
• Time in Patent Office: 655 Days
• Field of Search: None
• CPC Class Codes: C03C 25/321 Starch; Starch derivatives
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/092 Polycarboxylic acids
• CPC Class Codes: C08K 5/103 with polyalcohols
• CPC Class Codes: C08K 9/04 Ingredients treated with organic substances treated with macromolecular compounds C08K9/08
• CPC Class Codes: C08L 3/02 Starch; Degradation products thereof, e.g. dextrin
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: C09J 103/02 Starch; Degradation products thereof, e.g. dextrin
• CPC Class Codes: C09J 103/04 Starch derivatives
• CPC Class Codes: C09J 105/06 Pectin; Derivatives thereof
• CPC Class Codes: C09J 191/00 Adhesives based on oils, fats or waxes; Adhesives based on derivatives thereof
• CPC Class Codes: D04H 1/64 the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
• CPC Class Codes: D04H 3/004 Glass yarns or filaments
• CPC Class Codes: D04H 3/12 with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
• CPC Class Codes: E04B 1/7662 comprising fiber blankets or batts

Abstract

An environmentally friendly, bio-based binder system that is useful for the formation of fiberglass insulation, the system includes: A) an aqueous curable binder composition, which includes a carbohydrate and a crosslinking agent; and B) a dedust composition, which includes a blown, stripped plant-based oil and optionally at least one emulsifying agent. The bio-based binder system is typically heated to form a cured binder system.

Claims

1. A bio-based binder system useful for the formation of fiberglass insulation, the system comprising:

A) an aqueous curable binder composition comprising;

(i) at least one carbohydrate;

(ii) at least one crosslinking agent; and

B) a dedust composition comprising a blend of;

(i) a blown, stripped plant-based oil having a viscosity of at least 200 cSt at 40°

C., a flash point of at least 293°

C., and having an acid value less than 5.0 mg KOH/gram; and

(ii) from about 0.5 percent by weight to about 11 percent by weight, relative to the amount of the blown, stripped plant-based oil, of a refined, bleached, and deodorized plant based oil having greater than 0.0 percent by weight and less than 2 percent by weight 18;

3 fatty acid content,

wherein the bio-based binder system comprises at least one emulsifying component and wherein the bio-based binder system comprises 10 parts per million sulfur or less based on the weight of components A) and B), excluding water.

2. The binder system of claim 1, wherein the at least one emulsifying component comprises a first emulsifying component contained in dedust composition B), and wherein the dedust composition has less than 100 part per million sulfur, based on the weight of component B), excluding water.

3. The binder system of claim 2, wherein the dedust composition B) further comprises an aqueous fraction and an organic fraction.

4. The binder system of claim 3, wherein dedust composition B) comprises an oil in water emulsion and wherein the first emulsifying component is mixed into the blown, stripped plant-based oil of (i) before the emulsion is formed.

5. The binder system of claim 4, wherein a second emulsifying component is mixed into an aqueous solution before the oil in water emulsion is formed.

6. The binder system of claim 5, wherein the second emulsifying component is selected from the group consisting of carbohydrates, maltodextrin, carboxymethyl cellulose, polyols, and mixtures thereof.

7. The binder system of claim 1, wherein the at least one emulsifying component is selected from the group consisting of non-ionic emulsifiers, ionic emulsifiers, and mixtures thereof.

8. The binder system of claim 1, wherein the binder system comprises 5 part per million sulfur or less based on the weight of components A) and B), excluding water.

9. The binder system of claim 1, wherein the blown, stripped plant-based oil has a viscosity of at least 250 cSt at 40°

C.

10. The binder system of claim 1, wherein the blown, stripped plant-based oil has an acid value less than 4.0 mg KOH/gram.

11. The binder system of claim 1, wherein the blown, stripped plant-based oil comprises a blown, stripped, bodied plant-based oil.

12. The binder system of claim 1, wherein the blown, stripped plant-based oil has a hydroxyl number from about 1 mg KOH/gram to about 50 mg KOH/gram.

13. The binder system of claim 1, wherein the blown, stripped plant based oil has less than 50 ppm sulfur.

14. The binder system of claim 1, wherein said crosslinking agent is selected from the group consisting of polycarboxylic acids, salts of polycarboxylic acid, anhydrides, monomeric carboxylic acid with anhydride, polycarboxylic acid with anhydride, citric acid, salts of citric acid, adipic acid, salts of adipic acid, polyacrylic acid, salts of polyacrylic acid, polyacrylic acid based resins and combinations thereof.

15. The binder system of claim 1, wherein the weight ratio of binder composition A) to dedust composition B) is from about 100:

1 to 100;

34.

16. A cured binder system resulting from heating the binder system of claim 15 at a temperature and for a sufficient period of time sufficient to react the carbohydrate (i) with the crosslinking agent (ii) of the binder composition A.

17. The cured binder system of claim 16, wherein the cured binder system exhibits a relatively low odor profile.

18. The cured binder system of claim 17, wherein the cured binder system exhibits a lower odor profile than a comparable cured binder system resulting from curing a binder system having greater than 30 ppm sulfur based on the weight of the cured binder system.

19. The cured binder system of claim 16, wherein the cured binder system is used for the formation of a fiberglass insulation product and the fiberglass insulation product exhibits a lower odor profile than a comparable insulation product, which results from curing a fibrous insulation mat containing a binder system having greater than 15 ppm sulfur.