首页>
外国专利>
PROCESS FOR THE PREPARATION OF LARGE SURFACE AREA FINELY DIVIDED PRECIPITATED CALCIUM CARBONATE AND FILLED POLYMERIC COMPOSITIONS OF MATTER CONTAINING SAID CALCIUM CARBONATE
PROCESS FOR THE PREPARATION OF LARGE SURFACE AREA FINELY DIVIDED PRECIPITATED CALCIUM CARBONATE AND FILLED POLYMERIC COMPOSITIONS OF MATTER CONTAINING SAID CALCIUM CARBONATE
展开▼
机译:制备大面积精细划分的碳酸钙沉淀和含碳酸钙物质的高分子组合物的制备方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
This invention concerns a process for the preparation of large surface area, finely divided precipitated calcium carbonate which comprises introducing carbon dioxide into an aqueous slurry of greater than about five weight percent calcium hydroxide containing an anionic organopolyphosphonate polyelectrolyte, starting the introduction at a temperature above about 7 DEG C and below about 18 DEG C, continuing the introduction until calcite precipitation is substantially complete and adding a quantity of polybasic acid to the slurry in an amount greater than about 0.3% by weight of the precipitated calcium carbonate. This invention also concerns said large surface area, finely divided precipitated calcium carbonate which has been coated with a fatty acid derivative and polymeric compositions which contain such coated calcium carbonate.
展开▼