发明名称 |
MIDDEL TIL FORBEDRING AF PAATRYKBARHEDEN AF PAPIR OG KARTON, DETS FREMSTILLING OG ANVENDELSE |
摘要 |
Pigment-based agent (I) for increasing the printability of paper or cardboard is produced by: (a) making an aq. colloidal system (II) from pigment(s) (III) and water-soluble or swellable hydrogel(s) (IV) contg. anionic gps.; (b) coacervation of (II) with a quat. organic ammonium salt (V); and (c) concn. by sedimentation, centrifuging and/or press filtration. The claims also cover (I). Pref. (III) is kaolin. Pref. (IV) is produced from a hydrated cation-exchangeable smectic laminar silicate with an ion exchange capacity of 50-120 milliequiv./100 g, pref. Na bentonite; or a natural or synthetic organic polymer. (V) has 8-22 C alkyl gp(s). and pref. is stearyldimethylbenzylammonium chloride or distearyldimethylammonium chloride. (II) has a total solids content of 2-15, pref. 3-5 wt.%; and the (III):(IV) ratio is such that 5-40, pref. 10-20% of the (III) particles are coated by coacervation. Coacervation is carried out in the presence of a fat- or oil-soluble optical whitener. |
申请公布号 |
DK65888(A) |
申请公布日期 |
1988.08.11 |
申请号 |
DK19880000658 |
申请日期 |
1988.02.09 |
申请人 |
INSTITUT FUER PAPIER-, ZELLSTOFF- UND FASERTECHNIK DER TECH |
发明人 |
DESSAUER, GUIDO |
分类号 |
B41M5/52;D21H17/07;D21H17/63;D21H17/68;D21H17/69;D21H19/36;D21H21/50;(IPC1-7):D21H1/22;C09C3/00;D21H3/78;C09C1/40 |
主分类号 |
B41M5/52 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|