Pigmentation of polymers
US4004940A · kind A · utility
9Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Jan 13, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is provided an improved polypropylene/pigment concentrate for use in preparing pigmented fibers. The improvement comprises at least 95 weight percent of the polypropylene particles have a maximum chord of less than 50 microns. Fibers prepared from concentrates containing 10-75% by weight of pigment have improved color, fewer pigment agglomerates and fewer broken filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.