公开(公告)号：US6071475A

公开(公告)日：2000-06-06

申请号：US068905

申请日：1998-05-21

Applicant: Helmut Schmidt ,  Reiner Kasemann ,  Stefan Sepeur ,  Helmut Duddeck

Inventor： Helmut Schmidt ,  Reiner Kasemann ,  Stefan Sepeur ,  Helmut Duddeck

IPC: D21H25/18

CPC classification number: D21H25/18

Abstract: A process is disclosed for preserving paper involving the following steps:(a) a plurality of paper layers in contact with one another at least in regions is simultaneously brought into contact with a preservative fluid containing polycondensates based on one or more hydrolytic polycondensation-capable compounds of elements M of main groups III-V and sub-groups II-IV of the Periodic Table; in said polycondensates, at least one organic group (G) with at least two carbon atoms and for each carbon atom at least one atom selected from hydrogen or fluorine and without polar substituents is bound, either directly via one of the carbon atoms or via a connecting group A, to at least 0.1% of the central atoms M; and(b) the paper thus treated with the preservative fluid is dried and/or hardened.

Abstract translation: PCT No.PCT / EP96 / 05176 Sec。 371日期1998年5月21日 102（e）日期1998年5月21日PCT 1996年11月22日PCT公布。 出版物WO97 / 19224 日期1997年5月29日公开了一种用于保存纸的方法，涉及以下步骤：（a）至少在区域中彼此接触的多个纸层同时与含有缩聚物的防腐液接触，所述防缩液基于一种或多种水解 主要III-V族和元素周期表Ⅱ-Ⅳ族元素M的缩聚能力化合物; 在所述缩聚物中，至少一个具有至少两个碳原子的有机基团（G）和对于每个碳原子，至少一个选自氢或氟并且没有极性取代基的原子直接通过碳原子之一或经由 将A族连接至至少0.1％的中心原子M; 和（b）用防腐剂流体处理的纸被干燥和/或硬化。