CA2213894C - Corrosion inhibiting composition - Google Patents

Corrosion inhibiting composition Download PDF

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Publication number
CA2213894C
CA2213894C CA002213894A CA2213894A CA2213894C CA 2213894 C CA2213894 C CA 2213894C CA 002213894 A CA002213894 A CA 002213894A CA 2213894 A CA2213894 A CA 2213894A CA 2213894 C CA2213894 C CA 2213894C
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Prior art keywords
grams
corrosion inhibiting
composition
inhibiting composition
wax
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002213894A
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French (fr)
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CA2213894A1 (en
Inventor
Matthew William Longo
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Daubert Chemical Co Inc
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Daubert Chemical Co Inc
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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K15/00Anti-oxidant compositions; Compositions inhibiting chemical change
    • C09K15/04Anti-oxidant compositions; Compositions inhibiting chemical change containing organic compounds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K15/00Anti-oxidant compositions; Compositions inhibiting chemical change
    • C09K15/02Anti-oxidant compositions; Compositions inhibiting chemical change containing inorganic compounds

Abstract

A corrosion inhibiting composition, comprising 20% - 65%
(wt.) of a wax; 10.0% - 31.0% (wt.) of an oil; and 4.0% - 16.0% (wt.) of a active calcium sulfonate. The wax of the corrosion inhibiting composition is preferably a microcrystalline wax, and may be at least partially obtained from petrolatum. Up to 6.0% polypropylene may also be used, either alone or in combination with up to 6.0% polyethylene. The corrosion inhibiting composition may also include SEBS rubber, in an amount of 2.0% to 6.0%.

Description

(26525) CORROSION INHIBITING COMPOSITION
DESCRIPTION
Technical Field The invention relates to an improved corrosion inhibiting coating, and more particularly to a hot melt, corrosion inhibiting coating with superior adhesion, coating uniformity and high temperature handleability and stability for use in coating chassis components and other heavy metal parts of automobiles and other vehicles.
Background Of The Invention Corrosion inhibiting compositions for use with heavy metal parts of automobiles and other vehicles are known in the art . An example of such a composition s described in United States Patent No. 5,455,075, which is assigned to the assignee of the present invention. This composition is comprised of a number of components, particularly a plasticizer, a thixotropic overbased alkaline earth metal organic sulfonate complex with an alkaline earth metal carbonate, a Newtonian alkaline earth metal organic sulfonate, an antioxidant, a thermoplastic elastomer, a microcrystalline wax, and a polyethylene.
This composition was generally useful for its intended purpose. However, certain improvements in this composition were deemed to be desirable.
Summary of the Invention The present invention provides a corrosion inhibiting composition, comprising: (a) 200 - 650 of a microcrystalline wax and petrolatum; (b) :LO.Oo - 3l.Oo of a paraffinic oil; (c) 4.Oo - l6.Oo of an acti.vc= calcium sulfonate complexed with calcium carbonate; and (d) 2.Oo - 6.Oo of styrene-ethylene-butyrene-styrene (SEBS) :rubber.
A preferred embodiment of the invention is such a corrosion inhibitiTlg com,oosition which further contains up to 6.0% polypropylene,, either alone or in combination with up to 6.Oo polyethylene.
The presE~nt invention is superior in its low temperature adhesion. Particularly, tests have shown that the present composition remains adhered to the components that it coats at low temperatures, under stress, even with generally heavy coating thicknesses.

Detailed Description Of '.the Preferred Embodiment Some oil must. be used in the present composition.
The oil may be obtained by the addition of a conventional oil to the composition. Alternatively, the oil for this invention may be obtained from a dispersion which includes oil, but which is being primarily added to the composition for other of its ingredients. For example, in the below described embodiments, oil may be provided inst~sad by the SACI* RP-230 HF, which is used primarily as a source of the thixotropic calcium sulfonate.
This invention uses thixotropic calcium sulfonates because of its wel:1-known rust inhibiting capabilities. Its thixotropic characteristics are the key to uniformity of coating the present composition onto car frames and the like.
Unlike Newtonian mater=ials, thixotropic materials do not have a tendency to flow towards and collect at the bottom of a part.
Prior compositions controlled application viscosity through a blend of thixotropic and Newtonian sulfonates.
However, it has now been. discovered that other Newtonian materials such as oil wi.l_1 also control application viscosity.
The amount of sulfonate used depends upon the extent of corrosion protection de~;ired.
An antioxidant: may be used to increase pot life.
However, if the corrosion inhibiting composition is used rapidly by the enc. user, no antioxidant is necessary.
A thermoplastic elastomer enhances the firmness of the coating and its heat. resistance. A combination of a thermoplastic. ela=>tomer,, polypropylene, and polyethylene is believed to give t:he highest heat resistance.
* Trade-mark The wax used in this invention is of the highest melting type, as a relatively inexpensive way of enhancing heat resistance. In this embodiment, petrolatum has been added as a flexible wax to improve adhesion. Though sold under the 5 tradename "petrolatum", t=his material could also be considered to be a microcrystalline wax by those skilled in the art.
Polyethylene and polypropylene are used to increase heat resistance, arid the present invention uses the highest melting point polyE:thylene believed to be available to the general market. A:~ heat resistance increases, application temperature also increases.
A long chain alcohol imparts some water resistance to the formulation.
Carbon b7_ack is added as a pigment. Although a clear composition is as E:ffect:ive as a pigmented composition, the clear composition is susceptible to lowered performance upon exposure to UV ray:> .
The presE:nt formulations are blended to a specific viscosity range, so as to provide a particular film build. In a preferred embodiment, 'this invention is designed to provide a viscosity of 100-400 centipoise at. application temperatures.
At this viscosity, the typical film thickness ranges from 3-7 mils.
"Active calcium sulfonate complexed with calcium carbonate" means the actual amount of calcium sulfonate/calcium carbonate complex in a calcium sulfonate solution or dispersion. For a<~ampl.e, if the corrosion-inhibiting composition contains 1C)% by weight of a calcium sulfonate/calcium <;arbon.ate complex-containing dispersion, and that dispersion is 40o active (i.e., it contains 40o calcium 5a sulfonate/calcium c:arbon<~te complex) then, for the purposes of the claims, the amount of active c:alcium sulfonate complexed with calcium carbonate in the composition is 4.Oo active calcium sulfonate.
In another aspect of the invention, the wax of the corrosion inhibiting composition is a microcrystalline wax.
In yet another aspect of the invention, the wax of the corrosion inhibiting composition is at least partially obtained from petrolatum.
A still j=urthe:r aspect of the invention is a corrosion inhibitiTlg composition including up to 6.Oo polypropylene, either alone or in combination with up to 6.Oo polyethylene.
Yet another aspect of the invention is a corrosion inhibiting composition that includes SEBS rubber, particularly in an amount of 2.0% to 6.0%.

Various s~~urces provide the components that are used in the composition of the invention. The "oil", as that term is used in this specification and claims, is at least partial:Ly provided by a paraffinic oil sold as Citgo~' 340 Neutral, available from Citgo Petroleum Company, P.O. Box 3758, Tulsa, Oklahoma 74102. This 1~~ product is a solvent refined heavy paraffinic distillate.

The product has a C.'ommodity Code of 27-030, and a CAS
No.

of 64741-88-4.

Kraton* G-1652 thermoplastic rubber is the "SEHS

rubber" of the present specification and claims. This 15 thermoplastic rubber is a styrene-ethylene-butylene-styrene block copolymer. It is available from the Shell Chemical Company, 2001 Kirby Drive, Houston, Texas 77019.

The "active calcium sulfonate", as that term is used in the present. specification and claims, is provided by 20 Witco Corporation, 520 Madison Avenue, New York, New York 10022, in a product known as SACI RP-230 HF. The product is a colloidal dispersion in mineral oil of a .thixotropic overbased ca~Lcium organic sulfonate complexed with calcium carbonate. The composition comprises 75% (wt.) 25 2000 SUS napthenic oil, 12.5% (wt.) calcium carbonate, and 12.5% (wt). calcium sulfonate. Its viscosity ranges from 40,000 to 60,000 centipoise (cps) at 25 degrees C., and it has a typ:LCal viscosity of 50,000 cps at that temperature. For the purposes of this invention, this 30- product is 12.5% active calcium sulfonate.

Polyethy:Lene is provided by Petrolite Specialty Polymers Grou;a, 691.0 East 14th Street, Tulsa, Oklahoma 74112. The polyethylene is sold under the name Polywax*

3000 Polyethylene, and is a normal paraffin having an 35 average molecular weight of approximately 3000. This ethene homopolymer has a CAS Number of 9002-88-4.

EPAL*20+ alcohol is a blend of linear and branched alcohols. In parti~~ular, it is a fatty alcohol/paraffin mixture, with a CAS No. of 68911-61-5. It is sold by * Tr ode-mark Ethyl Corporation, Industrial Chemicals Division, Ethyl Tower, 451 Florida Boulevard, Baton Rouge,, Louisiana 70801.
A carbon brick fo:r the composition is provided by Cabot Corporation, Spe~~ial Blacks Division, 950 Winter St., P.O. Box 9073, Waltham, Massachusetts 02254. It is sold under the name "Monarch~120."
Polypropylene is provided by the Eastman Chemical Company, Texas Ea:~tman I7ivision, P.O. Box 7444, Longview, Texas . 75607-7444 . Th_i.s polypropylene is sold under the trademark Epolene: N-15 wax. Its Product Identification No. is PLS N-15.
Another wax is sold under the name Citgo~HI-618 wax by the Citgo Petroleum Corporation, P.O. Box 3758, Tulsa, Oklahoma 74102. This coax is a paraffin wax, and is the "microcrystalline: wax", as that term is used in both the specification and the claims. It has a commodity code 52-004, and a CA~> No. of 64742-61-6.
A highly overbase:d calcium sulfonate is provided under the trademark "Hybase LE C-400" by Surpass Chemicals Limited, Sonneborn Division of Witco Corporation, Suite 100, 250 Consumer Road, Willowdale, Ontario M2J 4V6.
Crude petro7_atum :is manufactured by Exxon Chemical as Exxon 3655, and is distributed as Paxwax~ 6681 by National Wax Company, 3850 Touhy Avenue, PO Box 549, Skokie, Illinois 60067.
Finally, an antioxidant and thermal stabilizer is used, and it is sold under the trademark "IRGANOX 1010".
30- This product has a CAS No. of 6683-19-8, and it is sold by Ciba-Geigy Corporation, Additives Division, Seven Skyline Drive, Hawtharne, New York 10532. ' Examples of products in accordance with the claimed invention are tlZe following. A composition that is described as being suitable for high temperature applications is one which will not drip off of parts at test temperatures of up to 280 degrees Fahrenheit.
A composition that is described as being suitable for low temperature applications is one which will not drip off * Trade-mark of parts at teat temperatures of up to 212 degrees Fahrenheit. A composition that is described as being suitable for standard <~pplications is one which will not r drip off of parts at test temperatures of up to 240 degrees Fahrenheit.
Example 1 This Examplf~ is a most preferred embodiment of the invention, especially f-_or high temperature applications.
Because of they high polypropylene content, this composition has superior heat resistance. In this Example, the followings ingredients are blended at room temperature into a mixer, with the mixer running during the addition of the ingredients, and in the following order: 30.9 grams of Citgo*340 Neutral oil; 4.8 grams of Kraton~G-1652 rubber; 18 grams of SAC K RP-230-HF; 4.1 grams of Polywax~C-3000; 4.8 grams of EPAL*20+; 2.5 grams of Monarch* 120 ca.~rbon b_Lack, as a pigment; and 3 . 9 grams of EPOLENE N-15 polypropylene. After the addition of the polypropylene, the blend is heated to 300 degrees F.
After the blend attains'. 300 degrees F., it is retained at that temperature for 30 minutes.
After 30 minutes, and with the blender continuing to run, the following ingredients are added, in the following order: 20.E3 grams Citgo~HI-618 wax, as the microcrystalline wax; 7Ø0 grams Paxwax*6681 petrolatum.
When all of these ingredients have been added, the temperature of the blend is raised to 320 degrees F.
After the temper~rture :reaches 320 degrees F~, the blend is mixed for an additional 30 minutes.
Example 2 ' This Example i~~ another embodiment for low temperature applications. Because it is not intended for high temperature applications, it is unnecessary to use polypropylene.
In this Ex~~mple, the following ingredients are blended at room temperature into a mixer, with the mixer running during the addition of the ingredients, and in * Trade-mark the following order: 23.775 grams of Citgo 340 Neutral oil; 4.1 grams of Kraton G-1652 rubber; 16 grams of SACI
RP-230-HF; 2.2 grams of Polywax C-3000 polyethylene; 4.0 grams of EPAL 20+; and 2.5 grams of Monarch 120 carbon black, as a pigment. After the addition of the pigment, the blend is heated to 300 degrees F. After the blend attains 300 degrees F., it is retained at that temperature for 30 minutes.
After 30 minutes, and with the blender continuing to run, the following ingredients are added, in the following order: 26.35 grams Citgo HI-618 wax, as the microcrystalline wax; 19.0 grams Paxwax 6681 petrolatum, which is also a source of wax; and 2.0 grams Witco Hybase C-400 (40% active), as the Newtonian calcium sulfonate.
When all of these ingredients have been added, the temperature of the blend is raised to 320 degrees F.
After the temperature reaches 320 degrees F., the blend is mixed for an additional 30 minutes.
Example 3 This Example is another embodiment, but for standard conditions, i.e., neither high nor low temperature conditions.
In this Example, the following ingredients are blended at room temperature into a mixer, with the mixer running during the addition of the ingredients, and in the following order: 24.5 grams of Citgo 340 Neutral oil; 4.8 grams of Kraton G-1652 rubber; 22 grams of SACI
RP-230-HF; 4.0 grams of Polywax C-3000 polyethylene; 4.8 grams of EPAL 20+; and 2.6 grams of Monarch 120 carbon black, as a pigment. After the addition of the pigment, the blend is heated to 300 degrees F. After the blend attains 300 degrees F., it is retained at that temperature for 30 minutes.
After 30 minutes, and with the blender continuing to run, the following ingredients are added, in the following order: 24.5 grams Citgo HI-618 wax, as the microcrystalline wax; 10.0 grams Paxwax 6681 petrolatum, which is also a source of wax; and 2.0 grams Witco Hybase C-400 (40% active), as the Newtonian calcium sulfonate.
When all of these ingredients have been added, the temperature of the blend is raised to 320 degrees F.
5 After the temperature reaches 320 degrees F., the blend is mixed for an additional 30 minutes.
Example 4 Another highly preferred embodiment in accordance 10 with the invention has so-called high temperature flow grade characteristics. This embodiment is made as follows.
In this Example, the following ingredients are blended at room temperature into a mixer, with the mixer running during the addition of the ingredients, and in the following order: 30.0 grams of Citgo 340 Neutral oil; 4.8 grams of Kraton G-1652 rubber; 18.0 grams of SACI RP-230-HF; 4.1 grams of Polywax C-3000 polyethylene;
4.8 grams of EPAL 20+; 2.5 grams of Monarch 120 carbon black, as a pigment; and 3.7 grams of EPOLENE N-15 polypropylene. After the addition of the polypropylene, the blend is heated to 300 degrees F. After the blend attains 300 degrees F., it is retained at that temperature for 30 minutes.
After 30 minutes, and with the blender continuing to run, the following ingredients are added, in the following order: 19.7 grams Citgo HI-618 wax, as the microcrystalline wax; 10.0 grams Paxwax 6681 petrolatum, which is also a source of wax; 2.0 grams Witco Hybase C-400 (40 o active) , as the Newtonian calcium sulfonate; and 0.2 grams Irganox 1010, as an antioxidant.
When all of these ingredients have been added, the temperature of the blend is raised to 320 degrees F.
After the temperature reaches 320 degrees F., the blend is mixed for an additional 30 minutes.
Example 5 Another embodiment in accordance with the invention is made as follows. This embodiment is highly similar to the embodiment of Example 4. However, the Citgo 340 Neutral oil is eliminated, and replaced by an equal amount of additional Citgo HI-618 wax.
In this Example, the following ingredients are blended at room temperature into a mixer, with the mixer running during the addition of the ingredients, and in the following order: 0.0 grams of Citgo 340 Neutral oil (oil is provided instead by the SACI RP-230 HF); 4.8 grams of Kraton G-1652 rubber; 18.0 grams of SACI RP-230 HF; 4.1 grams of Polywax C-3000 polyethylene; 4.8 grams of EPAL 20+; 2.5 grams of Monarch 120 carbon black, as a pigment; and 3.9 grams of EPOLENE N-15 polypropylene.
After the addition of the polypropylene, the blend is heated to 300 degrees F. After the blend attains 300 degrees F., it is retained at that temperatu-re for 30 minutes.
After 30 minutes, and with the blender continuing to run, the following ingredients are added, in the following order: 49.7 grams Citgo HI-618 wax, as the microcrystalline wax; 10.0 grams Paxwax 6681 petrolatum, which is also a source of wax; 2.0 grams Witco Hybase C-400 (40% active) , as the Newtonian calcium sulfonate; and 0.2 grams Irganox 1010, as an antioxidant.
When all of these ingredients have been added, the temperature of the blend is raised to 320 degrees F.
After the temperature reaches 320 degrees F., the blend is mixed for an additional 30 minutes.
The present compositions are superior in their ability to remain adhered at low temperatures.
Particularly, tests have shown that the present composition remains adhered to the components that it coats at low temperatures, under stress, even with generally heavy coating thicknesses. .

Claims (6)

1. A corrosion inhibiting composition, comprising:
(a) 20% - 65% of a microcrystalline wax and petrolatum;
(b) 10.0% - 31.0% of a paraffinic oil;
(c) 4.0% - 16.0% of an active calcium sulfonate complexed with calcium carbonate; and (d) 2.0% - 6.0% of styrene-ethylene-butyrene-styrene (SEBS) rubber.
2. The corrosion inhibiting composition of Claim 1, further comprising up to 6.0% polypropylene.
3. The corrosion inhibiting composition of Claim 1 or 2, further comprising up to 6.0% polyethylene.
4. The corrosion inhibiting composition of any one of Claims 1 to 3, which is adapted to be used for a heavy metal part of an automobile and has a viscosity of 100-400 centipoise at its application temperature.
5. The corrosion inhibiting composition of any one of Claims 1 to 4, which further comprises a long chain alcohol in an amount sufficient to impart water resistance to the composition.
6. The corrosion inhibiting composition of any one of Claims 1 to 5, which further comprises carbon black as a pigment.
CA002213894A 1997-08-22 1997-08-25 Corrosion inhibiting composition Expired - Fee Related CA2213894C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/916,348 US5888281A (en) 1997-08-22 1997-08-22 Corrosion inhibiting composition
US08/916,348 1997-08-22

Publications (2)

Publication Number Publication Date
CA2213894A1 CA2213894A1 (en) 1999-02-22
CA2213894C true CA2213894C (en) 2001-02-20

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JP4456440B2 (en) * 2004-08-31 2010-04-28 本田技研工業株式会社 Rust prevention composition
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US8334244B2 (en) 2005-01-18 2012-12-18 Bestline International Research, Inc. Universal synthetic water displacement multi-purpose penetrating lubricant, method and product-by-process
JP2006231327A (en) * 2005-02-23 2006-09-07 Inventio Ag Method for temporary protection of blank surfaces against corrosion, and component with temporary corrosion protection
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US20080099729A1 (en) * 2006-10-27 2008-05-01 Mcconnell Robin Corrosion inhibiting mixture
US7485177B1 (en) * 2007-07-20 2009-02-03 Sks Industries Volatile corrosion inhibiting mixture with tracing agent
JP2011508003A (en) 2007-12-19 2011-03-10 ベストライン・インターナショナル・リサーチ,インコーポレーテッド General synthetic lubricants, methods, and product-by-process to replace sulfur lubrication lost when using low-sulfur diesel fuel
US20150247103A1 (en) 2015-01-29 2015-09-03 Bestline International Research, Inc. Motor Oil Blend and Method for Reducing Wear on Steel and Eliminating ZDDP in Motor Oils by Modifying the Plastic Response of Steel
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US5888281A (en) 1999-03-30
CA2213894A1 (en) 1999-02-22

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