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Thermosetting coating composition for improved corrosion protection metal substrates

A technology of coating composition and metal substrate, applied in the direction of anti-corrosion coating, coating, polyurea/polyurethane coating, etc.

Active Publication Date: 2021-03-09
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on smooth substrates such as cold rolled steel, galvanized steel, iron phosphated steel, there is little difference between acrylic polyols and TMCD polyester polyols

Method used

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  • Thermosetting coating composition for improved corrosion protection metal substrates
  • Thermosetting coating composition for improved corrosion protection metal substrates
  • Thermosetting coating composition for improved corrosion protection metal substrates

Examples

Experimental program
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example

[0076] Testing of Coating Examples: Corrosion testing with "X" scratches in painted panels by ASTM B117 according to standard ASTM protocol. After the specified time, the panels were evaluated by immersing them in hot tap water for 30 minutes and scraping with a steel spatula to remove any loose coating. Scratched and cleaned painted test panels on figure 1 Indicated by 10, painted metal is indicated by cross-hatching. The initial "X" scratches on the painted test panels are indicated at 70 . Bare metal is indicated at 20, and painted metal-bare metal boundaries are indicated at 30. The width of the bare metal arm was obtained by averaging the three widths on the corroded plate ( figure 1 40, 50 and 60 in ). The evaluators selected the three most consistent arms on the scratch-treated board for measurement.

[0077] Three measurements for each corroded plate were recorded and averaged. For each corrosion time, the plates were run in duplicate, so the data recorded are th...

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PUM

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Abstract

Disclosed is a composition for improving the corrosion resistance of metals coated with 2K coatings. The composition comprises a polyol resin having a sulfonyl isocyanate grafted onto the resin. The polyol resins are polyester polyols and acrylic polyols. The grafted resins significantly improve metal corrosion resistance on smooth metal substrates when the grafted resins are incorporated into 2Kcoating systems.

Description

technical field [0001] The present invention relates generally to the field of organic chemistry. In particular, it relates to the use of grafted resins in coating compositions to improve the corrosion resistance of metal substrates. In particular, it involves the grafting of sulfonyl isocyanates onto active sites on polyester resins, polyacrylic resins, or other polyol resins, and the use of the grafted resins in 2K coating compositions to provide metal Improved corrosion resistance of the substrate. Background technique [0002] In many coating applications, primers are used to provide corrosion protection to metal substrates and one or more coats are applied over the primer to provide good weatherability and appearance. Numerous attempts have been made to develop single layers for metal coatings for use in protective care coatings and original equipment manufacturing (OEM) coatings. Often, these coatings do not perform as well as the market would like them to. The pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/24C08G18/42C08G18/46C08G18/62C08G18/71C08G18/79C08L75/00C09D175/04C09D175/06
CPCC08G18/711C08G18/715C08G18/792C08G18/246C08G18/423C08G18/4676C09D175/04C09D175/06C08G18/6225C08L75/00C08G18/42C08G18/622C08G2150/90C09D5/08
Inventor 小杰弗里·理查德·韦伯斯特乔斯夫·康奈尔·蒂莉
Owner EASTMAN CHEM CO