Compositions and methods for refractory coatings with ester carriers
US11712736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2020 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Dec 18, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5436
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This technology relates to refractory coatings used in metal casting by the foundry industry. Refractory coatings are often used to coat foundry cores and molds for the purpose of improving the quality of castings formed in connection with the cores or molds, particularly at the surface of the casting. Whereas traditional coatings comprise water based solvents that require excessive drying times or HAPs that emit hazardous VOCs, preferred embodiments of the present invention comprise refractory coatings having VOC-exempt ester based solvents, such as a dimethyl carbonate (DMC). Other preferred embodiments of the present invention comprise methods for reduction of VOC content in a foundry article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.