Furan Resin coated aggregate
US4478269A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Feb 16, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5755
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and composition for forming a dry free-flowing particulate solid is disclosed which utilizes a novel binder system for bonding particles of carbon, sand and/or other solid aggregate materials. The solid, non-sticky binder system comprises furfural, a phenolic novolak resin, and a liquid amine having free hydrogens on the amine nitrogen which is capable of reacting with furfural. This system is capable of adhering to such particles while retaining the free-flowing characteristics of the particles. The method involves mixing the aggregate with the furfural-phenolic novolak resin until tacky, and adding methylene chloride to the tacky mix while continuing to mix. The mix is cooled by the rapid evaporation of the methylene chloride and quickly forms the free-flowing characteristics of a powder or granulated material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.