Coating oil having improved electrocoat compatibility

• US 5,001,013 A
• Filed: 08/15/1989
• Issued: 03/19/1991
• Est. Priority Date: 08/15/1989
• Status: Expired due to Fees

• Current Assignee: Cincinnati Vulcan Company (Coolant Control, Inc.)
• Original Assignee: Cincinnati Vulcan Company (Coolant Control, Inc.)
• Inventors: Brewer, George E. F., Sturwold, Robert J.
• Primary Examiner(s): Herbert, Jr., Thomas J.
• Application Number:
  US07/394,379
• Time in Patent Office: 581 Days
• Field of Search: 428/457, 428/467, 428/469, 428/470, 428/471, 252/51.1 R, 252/51.5 R, 252/52, 252/49.5, 106/14.41, 106/14.28, 106/14.29, 106/14.13
• US Class Current: 428/467
• CPC Class Codes: C10M 101/02 Petroleum fractions
• CPC Class Codes: C10M 129/26 Carboxylic acids; Salts thereof
• CPC Class Codes: C10M 129/70 of monocarboxylic acids
• CPC Class Codes: C10M 129/72 of polycarboxylic acids
• CPC Class Codes: C10M 135/10 Sulfonic acids or derivatives thereof
• CPC Class Codes: C10M 141/08 at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2203/1045 used as base material
• CPC Class Codes: C10M 2203/1065 used as base material
• CPC Class Codes: C10M 2203/1085 used as base material
• CPC Class Codes: C10M 2207/10 Carboxylix acids; Neutral salts thereof
• CPC Class Codes: C10M 2207/125 having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
• CPC Class Codes: C10M 2207/129 having hydrocarbon chains of thirty or more carbon atoms
• CPC Class Codes: C10M 2207/281 of (cyclo)aliphatic monocarboxylic acids
• CPC Class Codes: C10M 2207/282 of (cyclo)aliphatic oolycarboxylic acids
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: C10M 2207/284 of aromatic monocarboxylic acids
• CPC Class Codes: C10M 2207/285 of aromatic polycarboxylic acids
• CPC Class Codes: C10M 2207/286 : of polymerised unsaturated acids
• CPC Class Codes: C10M 2207/34 : Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
• CPC Class Codes: C10M 2219/044 : Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10N 2010/02 : Groups 1 or 11
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2030/12 : Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• CPC Class Codes: C10N 2040/24 : without essential removal of material , e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
• CPC Class Codes: C10N 2040/241 : Manufacturing joint-less pipes
• CPC Class Codes: C10N 2040/242 : Hot working
• CPC Class Codes: C10N 2040/243 : Cold working
• CPC Class Codes: C10N 2040/244 : of specific metals
• CPC Class Codes: C10N 2040/245 : Soft metals, e.g. aluminum
• CPC Class Codes: C10N 2040/246 : Iron or steel
• CPC Class Codes: C10N 2040/247 : Stainless steel
• CPC Class Codes: Y10T 428/31714 : Next to natural gum, natural oil, rosin, lac or wax

Abstract

Coating oil compositions are provided which contain an oil-soluble metal petroleum sulfonate, an oxidate ester, an organic acid ester, and a hydrocarbon oil. The coating oils are highly effective for preventing rust and corrosion of both ferrous and non-ferrous metals but are particularly advantageous for application to metal sheet which is subsequently to be electrocoated. Coating oils formulated in accordance with the present invention exhibit improved electrocoat compatibility.

Claims

1. A coating oil composition having improved electrocoat compatibility comprising (a) 2 to 10 weight percent oil-soluble Group IA alkali metal or Group IIA alkaline earth metal petroleum sulfonate;

(b) 2 to 10 weight percent of a partially neutralized oxygenated hydrocarbon;

(c) 0.5 to 6 weight percent of an organic acid ester selected from esters of mono-nuclear aromatic acids having from 1 to 3 carboxyl groups and esterified with a mono-functional aliphatic alcohol having from 1 to 20 carbon atoms and esters of short-chain aliphatic dicarboxylic acids having from 4 to 10 carbon atoms and esterified with a mono-functional aliphatic alcohol having from 1 to 12 carbon atoms; and

(d) 80 to 95.5 weight percent inert, substantially sulfur-free hydrocarbon oil having 100°

F. viscosity of 50 to 500 SUS.

2. The coating oil composition according to claim 1 wherein (a) is a petroleum sulfonate of the formula (C_n H_2n-10 SO₃)_x Me where Me is lithium, sodium potassium, calcium or barium, n is an integer greater than 20, and x is 1 or 2 and equal to the valence of Me, and (b) is a calcium or barium soap.

3. The coating oil composition according to claim 2 wherein (d) is a naphthenic or paraffinic oil having a viscosity of 75 to 350 SUS.

4. The coating oil according to claim 3 comprising 2.5 to 6 weight percent (a);

2.5 to 6 weight percent (b);

1 to 5 weight percent (c); and

85 to 92 weight percent (d).

5. The coating oil according to claim 4 wherein (a) is the barium salt of dinonylnaphthalene sulfonic acid or the neutralized salt of barium dinonylnaphthalene sulfonic acid.

6. The coating oil according to claim 5 wherein (b) contains from 0.8 to 48.8 weight percent calcium or barium and has an acid number from 0.1 to 60.

7. The coating oil according to claim 6 wherein (d) is a 101 SUS naphthenic oil.

8. The coating oil according to claims 1, 2, 3, 4, 5, 6 or 7 wherein (c) is an ester derived from a mono-nuclear aromatic acid selected from benzoic acid, p-phthalic acid and trimellitic acid and an aliphatic alcohol having 2 to 13 carbon atoms or an ester derived from an aliphatic dicarboxylic acid having from 6 to 9 carbon atoms and an aliphatic alcohol having from 6 to 10 carbon atoms.

9. The coating oil according to claim 8 wherein (c) is a C_2-13 alkyl o-phthalate and is present from 1 to 4 weight percent.

10. The coating oil according to claim 9 wherein (c) is di-isodecyl o-phthalate.

11. The coating oil according to claim 8 wherein (c) is a C_6-10 alkyl adipate and is present from 2 to 5 weight percent.

19. A metal workpiece resistant to rust and corrosion having applied to its surface the coating oil composition of claim 1.

12. A coating oil composition having improved electrocoat compatibility comprising (a) 6 to 10 weight percent metal sulfonate/oxidate ester blend wherein the metal is sodium calcium, barium or mixtures thereof and the weight ratio of sulfonate to oxidate ranges from 2:

1 to 1;

2;

(b) 1 to 4 weight percent C_2-13 alkyl ester of o-phthalic acid; and

(c) 86 to 93 weight percent 75-350 SUS naphthenic or paraffinic oil.

13. The coating oil according to claim 12 wherein (a) is a sodium sulfonate/calcium oxidate ester blend.

14. The coating oil according to claim 13 wherein (b) is di-isodecyl o-phthalate.

15. A coating oil composition having improved electrocoat compatibility comprising (a) 6 to 10 weight percent metal sulfonate/oxidate ester b lend wherein the metal is sodium, calcium, barium or mixtures thereof and the weight ratio of sulfonate to oxidate ranges from 2:

1 to 1;

2;

(b) 2 to 5 weight percent C_6-10 alkyl ester of adipic acid; and

(c) 86 to 93 weight percent 75-350 SUS naphthenic or paraffinic oil.

16. The coating oil according to claim 15 wherein (a) is a sodium sulfonate/calcium oxidate ester blend.

17. The coating oil according to claim 16 wherein (b) is di-octyl adipate.

18. The coating oil according to claim 16 wherein (b) is di-(mixed C_7-9) adipate.