Granular colorant and method for preparing the same
US5240966A · kind A · utility
20Cited by
2References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 19, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Sep 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0097
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A granular colorant for coloring thermoplastic resins such as polypropylene, composed of dye/pigment-containing porous thermoplastic resin grains, which is characterized that a dye/pigment composition containing a dispersing agent and/or a carrier resin having a lower softening point than the porous thermoplastic resin grains and dye/pigment is filled in and/or adhered on the pores and/or surfaces of the porous thermoplastic resin grains, is disclosed. The granular colorant is hardly deteriorated by heat and has excellent handlability, meterability, dispersibility and dilutability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.