Rheology regulators such as ground natural calcium carbonates optionally treated with a fatty acid or salt and their use
US7300974B2 · kind B2 · utility
5Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Feb 20, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0239
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to the selection of a natural calcium carbonate crushed to a high degree of fineness, possibly treated with one or more fatty acids or one or more of their salts or mixtures thereof, and its use as a rheology regulator for polymeric compositions.The specific surface area is 14 to 30 m2/g measured according to the BET method to ISO 4652, and the oil absorption is greater than 16 measured according to ISO 787-V (Rub-out method).The conditions of mixing of the constituents and manufacture are improved, as well as the properties of the final product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.