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Copper pre-rinse for electrodepositable coating compositions comprising yttrium

A technology of electrodeposition and composition, applied in the direction of electrolytic coating, coating, electrophoretic plating, etc., can solve the problem of reducing the scale of the factory and the space of the workshop

Active Publication Date: 2015-12-09
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in automotive OEM plant planning, removing pre-processing equipment will mean that the plant size may be reduced or valuable plant space can be recovered

Method used

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  • Copper pre-rinse for electrodepositable coating compositions comprising yttrium
  • Copper pre-rinse for electrodepositable coating compositions comprising yttrium
  • Copper pre-rinse for electrodepositable coating compositions comprising yttrium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0067] Cationic Resin A: A cationic resin was prepared from a mixture of: 1039.8 grams of Crosslinker 1 (see description below), 55.0 grams of Macol 98B (bisphenol A-6 ethylene oxide polyol available from BASF Corporation), 69.6 grams of Diethylene glycol monobutyl ether methylal, 528.7 g EPON828 (epoxy resin available from Resolution Performance Products), 203.9 g bisphenol A and 0.18 g Tetronic 150R1 (available from BASF Corporation) were charged with a stirrer, temperature measuring probe, N 2 Protect the 4-neck round bottom flask with a Dean-Stark trap. The mixture was heated to 75°C and 34.7 g of diethanolamine were added. After the addition of diethanolamine, the mixture exothermed to about 80°C and was held for 30 minutes. 80.3 g of aminopropyldiethanolamine were added, the temperature was adjusted to 132°C, and the mixture was then held at this temperature for 2 hours while about 30 g of solvent were collected in the Dean-Stark trap. 1680 g of this mixture was poured...

Embodiment B

[0074] Grind Resin: This example describes the preparation of a quaternary ammonium salt-containing pigment-grind resin. Example B-1 describes the preparation of an amine-acid salt quaternizer, and Example B-2 describes the preparation of a polymer containing epoxy groups, which is then used with the amine-acid salt of Example B-1 Quarterly.

[0075]B-1 prepares amine-salt quaternizing agent through the following steps:

[0076] #

Material

number of copies

1

Dimethylethanolamine

445

2

PAPI290 available from Dow Chemical Co.

660

3

Butyl carbitol formal available from BASF Corp.

22.1

4

88% lactic acid aqueous solution

512

5

Deionized water

2136.11

[0077] Charge material 1 into a suitably fitted 5 liter flask. Material 2 was then charged with gentle agitation for 1.5 hours and then rinsed with material 3. During this addition, the reaction mixture was allowed to exotherm to a...

Embodiment C

[0083] Pigment Paste: This example describes the preparation of a pigment paste suitable for use in the composition in the electrodeposition bath of the present invention.

[0084] Prepare a pigment paste from the following ingredients:

[0085]

[0086] 1 Prepared from a mixture of the following ingredients: 632 g of the grinding resin containing quaternary ammonium salt groups of Example C; 92 g of deionized water; 19 g of n-butoxypropanol; and 368 g of STANNBO (available from Sankyo Organic Chemicals Co., Ltd. butyltin catalyst). The above ingredients were added in the order shown under high shear agitation. After the ingredients were thoroughly mixed, the pigment paste was transferred to an upright sand mill and ground to a Hegman value of about 7.25.

[0087] The above ingredients were first dispersed with high speed cowles blades for 30 minutes and then milled in a Premier Mill with 1.0-1.6 mm Zircoa media for 1 hour, or until a Hegman value of about 7 was reached....

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Abstract

A method includes (a) contacting at least a portion of a substrate material with a solution comprising a source of copper, wherein the solution is essentially free of a source of a group IIIB metal and a source of a group IVB metal; and (b) after step (a), contacting at least a portion of the substrate with an electrodepositable coating composition comprising (i) a film-forming resin and (ii) a source of yttrium.

Description

technical field [0001] The present invention relates generally to pre-rinses for yttrium-containing electrodepositable coating compositions. Background technique [0002] Electrodeposition as a coating application method involves depositing an electrodepositable coating composition onto an electrically conductive substrate under the influence of an applied electrical potential. Electrodeposition is becoming more and more important in the coatings industry because compared with non-electrophoretic coating methods, electrodeposition has higher paint utilization, better corrosion resistance and less environmental pollution. [0003] During electrodeposition, the electrodepositable coating composition is deposited onto a substrate that has been pretreated with a pretreatment solution, such as a zinc phosphate solution, prior to the electrodeposition process. The pretreatment step can impart an additional degree of corrosion protection to the substrate material compared to an un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/00
CPCC09D5/4492C09D5/4457C09D5/4465C23C22/08C23C22/13C25D13/10C25D13/20Y10T428/12493C09D5/00
Inventor T·L·齐格勒M·麦克米伦
Owner PPG IND OHIO INC
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