3Shibazaki, Hiroji, Edagawa, et al. Method for improving calcium carbonate [ P]. US,4219590. 1980 -08 -26.
4Passaretti ,June D. Acid - stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper [ P]. US,5043017. 1991 -08 -27.
6Wu Kuanting. Acid resistant calcium carbonate composition containing an aluminum salt, uses therefor and processes for its production [ P ]. US,5599388. 1997 - 02 - 04.
7Wu Kuanting. Surface modified calcium carbonate composition and uses therefor[ P]. CA ,2230054. 1997 - 03 - 06.
8Fortier Steven M, Rodriguez Jose M. Method for producing high solids aqueous acid resistant calcium carbonate suspensions and product therefor [ P ]. W0,9902608.1999 - 01 - 21.
9Sato Masahiro. Liquid crystal compound and liquid crystal composition [ P ]. JP,6072963, 1994 - 03 - 15.
10Okada Hitoshi, Matsuda Hitoshi, Wada Motohide, et al. Production of composite particle[ P]. JP, 11107189. 1999 - 04 - 20.