An amorphous silica, especially precipitated silica, suitable for use in toothpastes, has a high abrasivity represented by a perspex abrasion value in the range from about 23 to about 35.
申请公布号
ZA8701440(B)
申请公布日期
1988.10.26
申请号
ZA19870001440
申请日期
1987.02.27
申请人
UNILEVER PLC.
发明人
DIRK ALDCROFT;JOHN ROBERT NEWTON;JAMES PHILIP QUINN;PETER WILLIAM STANIER
