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Dry film lubricant

a technology of dry film and lubricant, which is applied in the direction of drilling pipes, natural mineral layered products, drilling casings, etc., can solve the problems of existing approaches to temporary lubricants with deficiencies, corrosion and/or blocking of parts, etc., and achieve good anti-blocking and anti-corrosion properties

Inactive Publication Date: 2006-01-05
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a product that can be easily removed with an alkaline cleaner and has good anti-blocking and anti-corrosion properties. The composition includes an acrylic copolymer or styrene / acrylic copolymer, water, wax emulsion or wax dispersion, and a particulate additive. Optionally, a rheological additive can be used. The composition may also include at least one of ammonium hydroxide or a defoaming compound.

Problems solved by technology

During storage, the substrates may be exposed to conditions that can cause corrosion and / or blocking of the parts.
Existing approaches to temporary lubricants have deficiencies.
Some compositions provide adequate corrosion protection but can cause blocking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0059] A dry film lubricant was prepared having the components listed in TABLE 1.

TABLE 1PercentageComponent(By Weight Of Composition)CARBOSET ® GA-2300 polymer16.7Talc (about 10 micron mean diameter)2.0Deionized Water18.3BYK ® 420 rheological additive0.5MICHEM ® EMULSION 62330 wax10.3CARBOSET ® 560 polymer51.8Ammonium hydroxide0.4

[0060] While not wishing to be bound to any theory of operation, the composition functions without the talc and the ammonium hydroxide, and so these components are optional. The pH of the composition should be 7 or greater.

example 2

[0061] The composition from TABLE 1 was characterized using conventional methods.

Liquid form

[0062] The viscosity of the composition as measured in a #2 Zahn Cup was 32-34 seconds. A free flowing liquid was observed after placing the composition in a sealed container at 100° F. for a predetermined time period, thus showing good storage stability.

Coated Panels

[0063] Cold rolled steel substrate panels were coated with the composition from TABLE 1 by using a drawdown bar. The coating weights, determined via the Weigh Strip Weigh method using methylethyl ketone (MEK), were 220-260 mg / sqft.

[0064] Water spotting was tested by placing a drop of water on the coated panel and observing for staining. No staining on coated panels was observed during the thirty minute water drop test.

[0065] 1T bend tests were performed using ASTM D4145. The test used a hand-operated die. The panels were then taped with Scotch tape at the location of the bend, the tape was removed and the bend radii were ...

example 3

[0070] The composition from TABLE 1 and the comparative dry film lubricant were each tested in a 24 hour stack test.

[0071] Cold rolled steel substrate panels were coated using either the composition from TABLE 1 or the comparative dry film lubricant. Like-coated panels were clipped face to face with paper clips and placed in a beaker over water, but not sitting in the water. The beaker was covered with plastic and taped shut, and then placed in an oven at 100° F. for 24 hours.

[0072] Panels coated with the composition from TABLE 1 showed no haziness, corrosion, or stickiness.

[0073] Panels coated with the comparative dry film lubricant were very hard to take apart and showed 80-90% haziness. It is not desired for the panels to show any corrosion or blocking as it will be hard to uncoil the coils after sitting in the hot and humid atmosphere.

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Abstract

The present invention relates to compositions and methods employing a first copolymer that is an acrylic copolymer or styrene / acrylic copolymer having a weight average molecular weight (Mw) of about 8,000 to about 14,000; a second copolymer that is an acrylic copolymer having a Mw of about 90,000 to about 130,000; a wax emulsion or dispersion, and a particulate additive. Optionally, the composition further comprises at least one of a rheological additive, ammonium hydroxide or a defoaming compound.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] The present application claims benefit to U.S. Provisional Application Ser. No. 60 / 585,058, filed Jul. 2, 2004, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION [0002] The invention relates generally to dry film lubricants, coatings, coated substrates, and methods related thereto. BACKGROUND OF THE INVENTION [0003] Metal plates or other like materials are often used to form parts, for various uses, including automotive, appliance, and general industrial uses, via stamping. Before stamping, the plates, or more broadly, substrates, are typically stored. During storage, the substrates may be exposed to conditions that can cause corrosion and / or blocking of the parts. Blocking is a surface phenomenon where two substrates adhere to each other, usually due to heat or pressure. [0004] To prevent corrosion and blocking, it is known by those of skill in the art to apply a coating to the substrate prior to stamping...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M107/28
CPCC08K3/34Y10T428/29C08L2205/02C09D5/008C10M105/38C10M2201/02C10M2203/10C10M2207/28C10M2207/401C10M2209/103C10N2220/02C10N2220/023C10N2230/06C10N2230/10C10N2240/102C10N2240/104C10N2240/105C10N2240/12C08L33/04C08L2666/04C10N2030/06C10N2030/10C10N2040/12C10N2040/26C10N2020/01C10N2020/011C10N2040/252C10N2040/255
Inventor SOHI, JASDEEP
Owner HENKEL KGAA
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