Lubricant compositions containing beta-glucans

Patent metadata

Field	Value
Publication number	US-10000720-B2
Application number	US-201515312855-A
Country	US
Kind code	B2
Filing date	May 19, 2015
Priority date	May 22, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

The presently claimed invention relates to a lubricant composition comprising at least one beta-glucan, optionally in form of one of its derivatives, at least one base oil, at least one additive component, and optionally water; the use of said lubricant compositions for reducing wear in metal-on-metal contact and the use of at least one beta-glucan for reducing the friction coefficient of a lubricant composition.

First claim

The invention claimed is:

1. A lubricant composition comprising
a) ≥0.01 to ≤10% by weight of at least one beta-glucan, optionally in form of one of its derivatives, and wherein the at least one beta-glucan is schizophyllan, scleroglucan, or zymosan,
b) ≥70 to ≤99.99% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III mineral oils, Group IV oils and Group V oils,
c) ≥0.0 to ≤30% by weight of at least one additive component, and
d) ≥0.1 to ≤30% by weight water,
whereby the sum of the weight percentages of the components a), b), c) and d) does not exceed 100% by weight and
whereby the derivative of the at least one beta-glucan contains a chemical moiety selected from the group consisting of sulfate, amine, acetate, phosphate, phosphonate and carboxymethyl.

2. The lubricant composition according to claim 1 , whereby the lubricant composition comprises ≥0.01 to ≤1.0% by weight of at least one beta-glucan, optionally in form of one of its derivatives.

3. The lubricant composition according to claim 1 , whereby the lubricant composition comprises ≥80 to ≤99.9% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III mineral oils, Group IV oils and Group V oils.

4. The lubricant composition according to claim 1 , whereby the lubricant composition comprises ≥0.01 to ≤30% by weight of at least one additive component.

5. A lubricant composition comprising
a) ≥0.01 to ≤10% by weight of at least one beta-glucan, optionally in form of one of its derivatives, and wherein the at least one beta-glucan is schizophyllan, scleroglucan, or zymosan,
b) ≥70 to ≤99.99% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III
c) ≥0.0 to ≤30% by weight of at least one additive component, and
d) ≥0.1 to ≤50% by weight water,

whereby the sum of the weight percentages of the components a), b), c) and d) does not exceed 100% by weight and
wherein the at least one additive component is present and is selected from the group consisting of antioxidants, dispersants, foam inhibitors, demulsifiers, seal swelling agents, friction reducers, anti-wear agents, detergents, corrosion inhibitors, extreme pressure agents, metal deactivators, rust inhibitors and pour point depressants.

6. The lubricant composition according to claim 5 , whereby the derivative of the at least one beta-glucan contains a chemical moiety selected from the group consisting of sulfate, amine, acetate, phosphate, phosphonate and carboxymethyl.

7. A lubricant composition comprising
a) ≥0.01 to ≤10% by weight of at least one beta-glucan, optionally in form of one of its derivatives, and wherein the at least one beta-glucan is schizophyllan, scleroglucan, or zymosan,
b) ≥70 to ≤99.99% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III mineral oils, Group IV oils and Group V oils,
c) ≥0.0 to ≤30% by weight of at least one additive component, and
d) ≥0.1 to ≤50% by weight water,

whereby the sum of the weight percentages of the components a), b), c) and d) does not exceed 100% by weight and
whereby the lubricant composition has a viscosity at 40° C. in the range of 2 to 3200 mm 2 /s as determined in accordance with DIN 51562.

8. A method for reducing wear between rubbing surfaces of at least one first material and at least one second material, whereby the first and the second material are independently selected from the group consisting of metals, ceramics, fiber-reinforced composites, plastics and wood,
comprising at least the step of applying the lubricant according to claim 1 onto the at least one first material.

9. The method according to claim 8 , whereby the at least one first material and the at least one second material consist of metal.

10. The lubricant composition according to claim 5 , whereby the lubricant composition comprises ≥0.01 to ≤1.0% by weight of at least one beta-glucan, optionally in form of one of its derivatives.

11. The lubricant composition according to claim 5 , whereby the lubricant composition comprises ≥80 to ≤99.9% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III mineral oils, Group IV oils and Group V oils.

12. The lubricant composition according to claim 5 , whereby the lubricant composition comprises ≥0.01 to ≤30% by weight of at least one additive component.

13. The lubricant composition according to claim 7 , whereby the lubricant composition comprises ≥0.01 to ≤1.0% by weight of at least one beta-glucan, optionally in form of one of its derivatives.

14. The lubricant composition according to claim 7 , whereby the lubricant composition comprises ≥80 to ≤99.9% by weight of at least one base oil selected from the group consisting of Group I mineral oils, Group II mineral oils, Group III mineral oils, Group IV oils and Group V oils.

15. The lubricant composition according to claim 7 , whereby the lubricant composition comprises ≥0.01 to ≤30% by weight of at least one additive component.

16. The lubricant composition according to claim 1 , whereby the beta-glucan is schizophyllan.

17. The lubricant composition according to claim 7 , whereby the beta-glucan is schizophyllan.

18. The lubricant composition according to claim 1 , whereby the beta-glucan is scleroglucan.

19. The lubricant composition according to claim 1 , whereby the beta-glucan is zymosan.

Assignees

• Basf Se
• Wintershall Holding GmbH

Inventors

• Kripp Reiner
• Seibert Andrea
• Fries Dirk
• Feβenbecker Achim
• Ruehle Thomas

Classifications

• C10M2209/12

  Polysaccharides, e.g. cellulose, biopolymers · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10M2209/1033

  used as base material · CPC title

• C10M2207/2835

  used as base material · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title