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Multi-component coatings that include polyurea coating layers

A polyurea coating technology, applied in the field of multi-component coatings including polyurea coatings, can solve problems such as high viscosity and poor adhesion

Active Publication Date: 2007-08-01
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, certain prior art polyurea coating systems are known to have deficiencies that inhibit their effectiveness in providing adequate protection or improving substrate performance
For example, known polyurea coating compositions may have relatively high viscosities which inhibit flow over substrates or other underlying coating compositions
Also, some polyurea coating compositions may have poor adhesion to previously applied coatings or to the substrate itself

Method used

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  • Multi-component coatings that include polyurea coating layers
  • Multi-component coatings that include polyurea coating layers
  • Multi-component coatings that include polyurea coating layers

Examples

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preparation example Construction

[0059] Amide functionality can be introduced into acrylic polymers by using suitable functional monomers in the preparation of the polymer, or by converting other functionalities into amide groups using techniques known to those skilled in the art. Likewise, other functional groups can be introduced as desired using (if available) suitable functionalizing monomers or necessary conversion reactions.

[0060] Acrylic polymers can be prepared by aqueous emulsion polymerization techniques and used directly in the preparation of aqueous coating compositions, or by organic solution polymerization techniques for solvent-borne compositions. When prepared via organic solution polymerization with groups capable of salt formation, such as acid or amine groups, the polymer can be dispersed in an aqueous medium after neutralization of these groups with base or acid. In general, any method known to those skilled in the art for preparing such polymers using recognized amounts of monomers may...

Embodiment

[0139] A polyurea composition was prepared from the formulation of Example 1 in Table 1 by mixing the Part A components to the Part B components in a 1:1 volume ratio in a high pressure impingement mixing apparatus manufactured by Gusmer Corporation.

[0140] The Part A ingredients were premixed and added to a storage chamber of the mixing device. Part B was prepared by mixing IPDI, terathane, butanediol, and neopentyl glycol to prepare a prepolymer under nitrogen atmosphere. A catalytic amount of dibutyltin dilaurate (DBTL) was added and the mixture was stirred for 15 minutes. The reaction mixture was heated first to 40°C and then to 100°C. The resulting prepolymer was cooled to 80° C., poured into 95% Desmodur N3400 and stirred for a further 15 minutes. Additional Desmodur N3400 was added to adjust isocyanate equivalent weight.

[0141] The calculated equivalent ratio of isocyanate to amine was 1.04.

[0142] Another polyurea composition was prepared from the formulation...

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Abstract

A polyurea composition, a multi-component composite coating and articles formed therefrom, and methods of forming the same are disclosed. The coating composition is formed from a reaction mixture comprising an isocyanate-functional component and an amine-functional component. The ratio of equivalents of isocyanate groups to equivalents of amine groups is greater than 1 while the volume mixing ratio of the isocyanate-functional component to the amine-functional component is capable of being applied to a substrate at 1:1.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Nos. 60 / 606,661; 60 / 606,670; 60 / 606,638; 60 / 606,672; technical field [0003] The present invention relates to multi-component coating compositions for application to substrates, especially for protection against corrosion, abrasion, impact damage, chemicals, ultraviolet light and / or other environmental conditions. Background technique [0004] The coating compositions are useful in a variety of industries, including the coating and / or painting of motor vehicles. In these industries, especially in the automotive industry, considerable effort has been expended to develop coating compositions with improved properties (protection and aesthetics). In the automotive industry, coatings are applied to various component substrates for protective and aesthetic purposes. Coatings are used to protect vehicle components from cosmetic damage (eg, dents, scratch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/72C08G18/12C08G18/79C08J7/043C08J7/046C09D7/45
CPCC08J7/047C08J2475/00C08G18/0885C09D175/02C08G18/4854C08G18/12C08G18/798C08G18/5024C08G18/725C08G18/3821Y10T428/31551C08J7/043C08J7/046C08J2475/02C08J7/0427C08J7/042C08G18/6685C09D175/00
Inventor S·V·巴兰西克D·M·大布雷茨J·迪马里奥T·R·霍克斯温德J·T·马茨J·莫拉莱斯H·L·森克福J·C·特林戴德
Owner PPG IND OHIO INC
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