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US 12,570,538 B2Granted
Alumina modified with a short chain carboxylic acid for use as a coating and a method for producing the same
OwnerMaria Roberta Rabaioli, Umesh Chaudhary +2inventors
InventorsMaria Roberta Rabaioli, Umesh Chaudhary, Luke Andrew Tatum, Bharat Kumar
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Abstract
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.
Claims9
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 %.
4 more elements
Dependencies are inferred from the claim text.