Resin compositions
US4722952A · kind A · utility
6Cited by
7References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | May 9, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Silica fume subject to a mechanical reduction in size by a milling process such as a fluid energy mill or jet mill is disclosed. The overall size reduction is at least 10%. The milled silica fume product should have not more than 0.5% by weight unable to pass through a 325 mesh screen. The milled silica fume can be used in thermoplastic resins, cementitious material and refactory material. The use of the milled silica fume with UPVC or PVC to make conduit with improved elastic modulus, improved impact resistance, decreased wall thickness and increased calcium carbonate content is specifically disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.