发明名称 |
Process for preparing a treated paper coating pigment |
摘要 |
There is disclosed a paper coating composition comprising, in aqueous suspension, an adhesive and a treated paper coating pigment prepared by the following process: (i) suspending a paper coating pigment in water to form a suspension containing at least 5% by weight of the pigment, the pH being adjusted, if necessary, to lie below 7.5; (ii) mixing with the suspension formed in step (i) a water-soluble organic compound having a plurality of primary and/or secondary amine groups and a number average molecular weight not greater than 1000; and (iii) at least partially dewatering the mixed suspension resulting from step (ii) to form a dewatered suspension of a treated paper coating pigment containing not more than about 30% by weight water; characterized in that the water soluble organic compound is added in step (ii) in an amount sufficient to decrease the 5 poise viscosity concentration of an aqueous suspension of the treated pigment relative to that obtained with the untreated pigment. The paper coating composition is particularly suited to the preparation of a coated paper which is to be printed on by a gravure technique.
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申请公布号 |
US5322879(A) |
申请公布日期 |
1994.06.21 |
申请号 |
US19920988727 |
申请日期 |
1992.12.10 |
申请人 |
ECC INTERNATIONAL LIMITED |
发明人 |
GANE, PATRICK A. C.;GOLLEY, CHRISTOPHER R. L. |
分类号 |
D21H19/38;C09C1/42;D21H19/40;D21H19/44;D21H19/58;(IPC1-7):C08K3/34 |
主分类号 |
D21H19/38 |
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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