ACID REACTABLE INORGANIC MINERAL FILLERS HAVING IMPROVED COMPATIBILITY WITH POLYOLEFIN RESINS

摘要

Mineral fillers reactable with acids such as metal carbonates such as CaCO3 are rendered more compatible with polyolefin resins such as polyethylene by first reacting the fillet with a long chain carboxylic acid to form a surface film of the acid. The acid reacted filler is contacted with a vinyl ester of the acid which is then polymerized in the presence of a free racical catalyst such as benzoyl peroxide to encapsulate the acid reacted filler in a coating of the polymerized ester.