The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 1990
Filed:
Jan. 27, 1988
Applicant:
Inventor:
Guido Dessauer, Tutzing, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ; C09D / ;
U.S. Cl.
CPC ...
106499 ; 106486 ; 106487 ; 428403 ;
Abstract
The invention relates to a process for the production of an agent suitable for the paper and board industry and improving the printability of paper and board, wherein an aqueous colloidal system is prepared from at least one pigment and at least one water-soluble or water-swellable hydrogel containing anionic groups, said system is subjected to coacervation by means of a quarternary organic ammonium salt and, if appropriate, the product obtained in the coacervation is concentrated by sedimentation, centrifuging and/or filter-pressing, to the agent produced and to the use thereof in the paper and board industry.