Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrodepositable coating compositions and methods for their production

A composition and electrodeposition technology, used in electrophoretic coatings, coatings, thin material processing, etc., can solve the problems of large gelation danger, high molecular weight resin stickiness, manufacturing difficulties, etc.

Inactive Publication Date: 2008-04-02
PPG IND OHIO INC
View PDF42 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacture of such compositions may present difficulties
For example, high molecular weight resins tend to be extremely viscous which can make the dispersion process difficult
Furthermore, when preparing electrodepositable coating compositions comprising high molecular weight film-forming resins, there is often a considerable risk of gelation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrodepositable coating compositions and methods for their production
  • Electrodepositable coating compositions and methods for their production
  • Electrodepositable coating compositions and methods for their production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

Deionized water

4098.13

1 Light stabilizers available from Ciba Geigy Corporation.

2 2,2'-Azobis(2-methylbutyronitrile) available from Du Pont Specialty Chemicals.

3 N-butoxypropanol solvent available from Dow Chemical Co.

4 Propylene glycol monomethyl ether solvent available from Dow Chemical Co.

5 50% tert-butylperoxyacetate in pine spirit available from Arkema Inc.

6 Diketimine formed from diethylenetriamine and methylisobutylketone (72.69% solids content in methylisobutylketone).

7 Blocked isocyanate curing agent at 79.5% solids in methyl isobutyl ketone. By combining 10 equivalents of isophorone diisocyanate with 1 equivalent of trimethylolpropane, 3 equivalents of bisphenol A ethylene oxide polyol (prepared at a bisphenol A:ethylene oxide molar ratio of 1:6) and 6 equivalents Prepared by reaction of primary hydroxyl groups from 1,2-butanediol.

[0117] Component A was heated to reflux in a 3 liter flask equipped with stirrer, thermoc...

Embodiment B1-B3

[0119] The dispersion prepared in Example A was divided into three equal portions. For Example B1, the solvent was removed from part 1 by distillation under reduced pressure. For Example B2, Part 2 was stirred at room temperature while 1% TMXDI (on a solids basis) was added over 1 hour as a 50 wt% solution in methyl isobutyl ketone. The solvent was then removed by distillation under reduced pressure. For Example B3, Part 3 was stirred at room temperature while 2% TMXDI (on a solids basis) was added over 1 hour as a 50 wt% solution in methyl isobutyl ketone. The solvent was then removed by distillation under reduced pressure.

Embodiment B4

[0120] For Example B4, 700 grams of the dispersion prepared in Example A were mixed with 627 grams of the resin prepared in Example H of US Patent Application Publication 2003 / 0054193 Al. For Example B5, the mixture of Example B4 was stirred at room temperature while adding a mixture of 2.26 g TMXDI and 2.26 methyl isobutyl ketone within 1 hour. The solvent was then removed by distillation under reduced pressure.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

Methods are disclosed for producing aqueous dispersions comprising a resinous phase dispersed in a dispersing medium, wherein the resinous phase includes an active hydrogen-containing film-forming resin Also disclosed are electrodepositable coating compositions that include such dispersions, electroconductive substrates at least partially coated with such compositions, and methods for at least partially coating electroconductive substrates with such compositions.

Description

field of invention [0001] The present invention relates to electrodepositable coating compositions comprising a high molecular weight resinous phase, such as compositions resistant to photodegradation, and processes for the preparation of aqueous dispersions which may be included in such compositions. The invention also relates to conductive substrates at least partially coated with such compositions, photodegradation-resistant multilayer coatings comprising primer layers formed from such compositions, and conductive substrates at least partially coated with such compositions. material method. Background of the invention [0002] Electrodepositable coating compositions are commonly used to provide coatings that protect metallic substrates, such as those used in the automotive industry, from corrosion. Electrodeposition methods generally provide higher paint application, superior corrosion resistance, low environmental pollution, and / or highly automated methods relative to n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/44
CPCC09D5/4473Y10T428/31551Y10T428/31504C09D5/44
Inventor D·R·芬恩
Owner PPG IND OHIO INC