Coated particulate fillers comprises a phosphinic acid group-containing unsaturated organic polymer
US4496670A · kind A · utility
6Cited by
7References
21Claims
0Family size
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Key dates
| Filing date | Nov 15, 1983 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Nov 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Filler particles are coated with an adduct of an unsaturated polymer, e.g. polybutadiene, and phosphinic acid groups. The coated filler may be prepared by reacting an unsaturated organic polymer with a phosphorus trihalide and applying the product in the form of a solution or dispersion in an organic solvent to mineral, e.g. calcium carbonate, particles. If liquid, the product may alternatively be applied as such to the mineral particles. In either case, the product so applied is then hydrolyzed in situ in order to form the phosphinic acid groups. The coated filler particles are useful in the reinforcement of elastomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.