Phosporescent polycarbonate, concentrate and molded articles
US6692659B2 · kind B2 · utility
25Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2469/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Thermoplastic composition comprising a thermoplastic resin and a phosphorescent pigment with a aluminate matrix expressed by M—Al in which M is at least one metal element selected from calcium, strontium and barium and Al represents an aluminate group, wherein the pigment has been coated with a silicone oil.Objects formed by injection molding of the thermoplastic resin compositions. The compositions of the invention exhibit improved melt flow stability and suffer less from graying upon compounding them in an extruder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.