Low VOC furan resins and method of reducing VOCs in furan resins
US5545825A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G16/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to furan resins having low levels of VOCs. The claimed furan resins are the reaction product of a source of ammonia and a first reaction product, said first reaction product being derived from the reaction between a source of reactable formaldehyde, a formaldehyde scavenger, and an acidic furan resin resulting from the polymerization reaction wherein at least one reagent is selected from the group consisting of the furan containing molecule having the general formula ##STR1## and its saturated analogs thereof having zero to one carbon-carbon double bonnets, wherein X and Y are independently comprised of organic molecular groups. The invention further pertains to a method of decreasing formaldehyde in undesirable volatile organic compounds in furan resins, consisting of the steps of providing an acidic aqueous compatible furan resin, providing a source of reactable formaldehyde, mixing a formaldehyde scavenger with the furan resin in the presence of the source of reactable formaldehyde to form a first mixture, heating the first mixture to a temperature of less than 100.degree. C. for a period of from one to ten hours, adding a source of ammonia to the f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.