Powder lubricant based on fatty acids and fatty acid glycerides and use thereof

Patent metadata

Field	Value
Publication number	US-2018251699-A1
Application number	US-201815970267-A
Country	US
Kind code	A1
Filing date	May 3, 2018
Priority date	Nov 4, 2015
Publication date	Sep 6, 2018
Grant date	—

Abstract

A dry lubricant composition in powder form is provided based on a mixture of alkali metal salts of fatty acids and fatty acid glycerides which is useful in the production of aluminium cans in a deep drawing process, wherein the formed aluminium cans are immediately further processed to yield thin inorganic and/or organic protective coatings. The invention also encompasses the use of the lubricating powder for cold forming of aluminium as well as a process for the deep drawing of aluminium cans.

First claim

What is claimed is:

1 . A lubricating powder comprising:
a) more than 60 wt.-% of at least one alkali metal salt of a fatty acid, b) at least one fatty acid mono-, di- or triglyceride,
wherein the lubricating powder has a weight ratio of compounds according to component a) to compounds according to component b) that is not greater than 30.

2 . The lubricating powder according to claim 1 , wherein the weight ratio of compounds according to component a) to compounds according to component b) is at least 6.

3 . The lubricating powder according to claim 1 , wherein the at least one alkali metal salt of a fatty acid is selected from alkali metal salts of C10-C22 fatty acids.

4 . The lubricating powder according to claim 3 , wherein the at least one alkali metal salt of a fatty acid is selected from alkali metal salts of fatty acids having not more than one unsaturated carbon-carbon bond.

5 . The lubricating powder according to claim 4 , wherein the at least one alkali metal salt of a fatty acid is selected from stearates.

6 . The lubricating powder according to claim 1 , wherein compounds according to component a) are present in an amount of at least 70 wt.-%, but less than 95 wt.-% based on the total composition of the lubricating powder.

7 . The lubricating powder according to claim 1 , wherein compounds according to component a) are present in an amount of at least 75 wt.-%, but less than 90 wt.-% based on the total composition of the lubricating powder.

8 . The lubricating powder according to claim 1 , wherein component b) is selected from diglycerides, triglycerides and combinations thereof.

9 . The lubricating powder according to claim 1 , wherein component b) is selected from mono-, di-, tri-glycerides and combinations thereof which are based on C10-C22 fatty acids, while the glycerides have an iodine value of 50 to 130.

10 . The lubricating powder according to claim 9 , wherein component b) is selected from mono-, di-, tri-glycerides and combinations thereof which are based on C14-C20 fatty acids, while the glycerides have an iodine value of 70 to 95.

11 . The lubricating powder according to claim 1 , wherein component b) comprises triglycerides based on alkoxylated fatty acids having a degree of alkoxylation of at least 20, but not more than 50.

12 . The lubricating powder according to claim 11 , wherein component b) further comprises triglycerides based on non-alkoxylated fatty acids with an iodine value of 80 to 100 g I 2 /100 g.

13 . The lubricating powder according to claim 12 , wherein overall proportion of alkoxylated triglycerides amounts to at least 20 wt.-% based on the total amount of compounds according to component b).

14 . The lubricating powder according to claim 1 , wherein compounds according to component b) are present in an amount of at least 2 wt.-%, but not more than 20 wt.-%, based on the total composition of the lubricating powder.

15 . The lubricating powder according to claim 1 , further comprising component c) at least one alkali metal lignosulfonate present in an amount of at least 0.1 wt.-%, but less than 5 wt.-% based on the total composition of the lubricating powder.

16 . The lubricating powder according to claim 15 , wherein component a) comprises alkali metal salts of saturated C10-C22 fatty acids;
component a) being present in an amount of at least 70 wt.-%, but less than 90 wt.-% based on the total composition of the lubricating powder; and component b) comprises:
1) triglycerides based on alkoxylated fatty acids having a degree of alkoxylation of at least 20, but not more than 50; and
2) triglycerides based on non-alkoxylated fatty acids based on C14-C20 fatty acids;
component b) being present in an amount of at least 4 wt.-%, but not more than 20 wt.-% based on the total composition of the powder.

17 . The lubricating powder according to claim 15 , further comprising component d) at least one extreme pressure additive present in an amount of 1 to 8 wt.-% based on the total composition of the lubricating powder.

18 . The lubricating powder according to claim 16 , further comprising component e) at least one organic solvent present in an amount of at least 1 wt.-%, but less than 10 wt.-%, based on the total composition of the lubricating powder.

19 . Use of a lubricating powder according to claim 1 for cold forming of aluminum parts.

20 . A process for producing aluminum cans comprising steps of:
a) placing a multitude of aluminum flats and a lubricating powder according to claim 1 in one container; b) vibrating or tumbling the container to thereby coat the aluminum flats with a lubricating film of the lubricating powder; c) deep-drawing the aluminum flats into cans through punching; and optionally d) cleaning and degreasing of the aluminum cans.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Odink Gerrit Jan
• Chinchole Amol

Classifications

• C10M2209/1045

  used as base material · CPC title

• C10N2010/02

  Groups 1 or 11 · CPC title

• C10M2223/047

  Thioderivatives not containing metallic elements · CPC title

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title

• C10N2060/10

  by sulfur or a compound containing sulfur · CPC title