Method of forming fire retardant insulating material from plastic foam scrap and the resultant product
US4714715A · kind A · utility
3Cited by
12References
14Claims
0Family size
Inventor
Key dates
| Filing date | Mar 7, 1986 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Mar 7, 2006 |
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 scrap 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 scrap-resin mix by applying dielectric heating to foam the resin, and cure the foamed resin to a closed cell structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.