RED PHOSPHORUS-BASE FLAME RETARDANT FOR EPOXY RESINS, RED PHOSPHORUS-BASE FLAME RETARDANT COMPOSITIONS THEREFOR, PROCESSES FOR THE PRODUCTION OF BOTH, EPOXY RESIN COMPOSITIONS FOR SEALING FOR SEMICONDUCTOR DEVICES, SEALANTS AND SEMICONDUCTOR DEVICES
US6858300B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2001 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | May 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31511
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The red phosphorus base flame retardant for an epoxy resin is provided, which has red phosphorus particles coated with a thermosetting resin containing an anhydrous zinc compound. The coated red phosphorus has properties that a slurry having the coated red phosphorus dispersed in 10% by weight into water at 20° C. has an electric conductivity of 30 μs/cm or below, the slurry having been left standing at 80° C. for 20 hours has an electric conductivity of 150 μs/cm or below, and when 80 ml of water is added to 8 g of the coated red phosphorus and heated at 80° C. for 20 hours, a concentration of PO4 ions eluted is 10 ppm or below.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.