US12570538USUSPTO Grant XML

Alumina modified with a short chain carboxylic acid for use as a coating and a method for producing the same

The invention provides for a method of producing a modified alumina for use in a coating composition, the method being characterised by hydrothermally treating an alumina suspension under specific conditions before and/or after adding an organic modifier. The invention further provides for a modified alumina made according to the method of the invention and to uses of the modified alumina in coating applications including anti-corrosive compositions and adhesive coatings.

Patent

Brief

Patent brief

Problem

How can corrosion in underground pipelines and conduits be prevented?

Novelty

The invention further provides for a modified alumina made according to the method of the invention and to uses of the m...

Uses

Underground pipe, Metal conduit, Industrial line

Assignee

Unknown assignee

Published

Mar 10, 2026

Inventors

Maria Roberta Rabaioli, Umesh Chaudhary, Luke Andrew Tatum, Bharat Kumar

Domain

Infrastructure / energy

Plain-English summary

Problem

How can corrosion in underground pipelines and conduits be prevented?

Solution

Key novelty

The invention further provides for a modified alumina made according to the method of the invention and to uses of the modified alumina in coating applications including anti-corrosive compositions and adhesive coatings.

Applications

Underground pipeMetal conduitIndustrial line

Relevant search intents

coating

Claims preview

1 . A modified alumina comprising: a boehmite modified with a carboxylic acid having a carbon chain length of less than 10 and at least 6, the modified alumina having: i) a crystallite size on the (120) plane ranging from 2 nm to 200 nm; ii) an aspect ratio on the (120)/(020) plane of between 1 and 2; iii) an aspect ratio on the (200)/(020) plane of between 1.0 and 6.0; iv) an aspect ratio on the (002)/(020) plane of between 3.0 and 6.0; and v) a carbon content in the range of 3 to 10 mass %. 2 . A coating composition including the modified alumina of claim 1 and a dispersant. 3 . A method of producing the modified alumina of claim 1 , the method comprising the steps of: i) providing an alumina suspension comprising alumina and water, the alumina suspension optionally being hydrothermally treated at a temperature of between 20 C. and 90 C. for a period of between 0.5 and 5 hours to form a hydrothermally treated alumina suspension; ii) adding an organic modifier to the alumina suspension or the hydrothermally treated alumina suspension to form a modified alumina suspension; iii) hydrothermally treating the modified alumina suspension at a temperature of between 20 C. and 85 C. for a period of between 0.5 and 5 hours to form a hydrothermally treated modified alumina suspension; and iv) drying the hydrothermally treated modified alumina suspension to form the modified alumina.

Linked approaches

Protective coatings

Barrier layers that isolate metal surfaces from corrosive environments.

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