Title:
【発明の名称】水中に懸濁された顔料の処理方法ならびに製紙方法
Document Type and Number:
Japanese Patent JPH04507440
Kind Code:
A
Abstract:
PCT No. PCT/DE91/00376 Sec. 371 Date Jan. 6, 1992 Sec. 102(e) Date Jan. 6, 1992 PCT Filed May 8, 1991 PCT Pub. No. WO91/18148 PCT Pub. Date Nov. 28, 1991.Pigments for the papermaking industry, in particular kaolin, are treated with a high molecular polymerizate that is solvated by means of carboxylate groups and belongs to an ethylenically unsaturated, radically polymerizable carboxylic acid as the binder. By gradually adding an acidifying agent the binder is coacervated and totally precipitated on the pigment. It is important that the quantity of the acidifying agent is limited in such a manner that the pigment retains a negative surface charge and the coacervate still contains water. With the pigment treated thus printing papers with increased pigment content and/or increased breaking strength can be manufactured.
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Inventors:
Dessauer, Guido
Application Number:
JP50843391A
Publication Date:
December 24, 1992
Filing Date:
May 08, 1991
Export Citation:
Assignee:
Roehm GmbH
International Classes:
D21H17/67; D21H17/37; D21H17/68; D21H17/69; D21H23/10; (IPC1-7): D21H17/37
Attorney, Agent or Firm:
Toshio Yano (2 outside)