Fine yellow composite iron oxide hydroxide pigment, and paint or resin composition using the same
US6139618A · kind A · utility
8Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fine yellow composite iron oxide hydroxide pigment of the present invention has an average major axial diameter of not less than 0.005 .mu.m and less than 0.1 .mu.m, which comprises: PA1 fine goethite particles as core particles, containing aluminum inside thereof in an amount of 0.05 to 50% by weight, calculated as Al, based on the weight of said core particles; and PA1 a composite oxide hydroxide of Fe and Al, coated on the surface of each core particle. Such fine yellow composite iron oxide hydroxide pigment are excellent in transparency and heat resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.