发明名称 |
KALZINIERTER KAOLIN-TON ALS PIGMENTFÜLLSTOFF FÜR PAPIER. |
摘要 |
A low-abrasion calcined kaolin opacifying pigment composed of particles in the size range of about 70 to 84% by weight finer than 2 microns and having a color defined by Hunter Trisitimulus values of "L" within the range of 92 to 94, "a" within the range of < +>1.0 to < +>2.2 and "b" within the range of < +>6.4 to < +>7.5. The pigment is produced by novel wet processing including high solids degritting of a high iron, high titania content Tertiary kaolin without conventional fractionation, bleaching and dewatering to isolate a fine particle size fraction, followed by spray drying, pulverization, calcination and repulverization. |
申请公布号 |
AT130348(T) |
申请公布日期 |
1995.12.15 |
申请号 |
AT19910301214T |
申请日期 |
1991.02.14 |
申请人 |
ENGELHARD CORPORATION |
发明人 |
BERUBE, RICHARD R.;BABIEC, JOHN S.;JAMESON, M. PHILLIP;NEGELE, ANDREW R.;WILLIS, MITCHELL J. |
分类号 |
B28C1/08;C01B33/26;C09C1/42;D21H11/00;D21H11/08;D21H17/67;D21H17/68;D21H21/50;D21H21/52;(IPC1-7):C09C1/42 |
主分类号 |
B28C1/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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