Method of manufacturing fire retardant polystyrene insulating board
US4596682A · kind A · utility
5Cited by
10References
4Claims
0Family size
Inventor
Key dates
| Filing date | May 11, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | May 11, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/07
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Fire retardant polystyrene insulating material is manufactured from expandable polystyrene beads in admixture with a phenol-formaldehyde or melamine-formaldehyde resin in resole form, the resin containing a blowing agent and a surfactant. The insulating material is formed from the bead-resin mix by applying dielectric heating to foam the resin, expand the beads, and cure the foamed resin to a closed cell structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.