公开(公告)号：US3372156A

公开(公告)日：1968-03-05

申请号：US39263164

申请日：1964-08-27

Applicant: KALLE AG

Inventor： FRANZ SCHWARZER ,  HANS MACHOLDT

IPC: C08B11/20 ,  C08F8/28 ,  C08L1/28 ,  C08L3/00 ,  C08L29/04

CPC classification number: C08L1/28 ,  C08B11/08 ,  C08B11/20 ,  C08L3/00 ,  C08L29/04 ,  C08L2666/02

Abstract: The solubility in water of a water-soluble or unlimitedly water-swellable macromolecular carbohydrate or derivative thereof, especially of a cellulose ether, or of a polyvinyl alcohol or derivative thereof, is improved by treatment at elevated temperature with a dialdehyde polysaccharide in a proportion of 0.1-5% by weight, especially 0.3-5% by weight. Specified materials include cellulose ethers and esters, especially methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and mixed ethers of cellulose, starch ethers and esters, modified starches, vegetable gums, e.g. gum tragacanth and their derivatives, alginates, polyvinyl alcohol and its derivatives, especially partially etherified or esterified polyvinyl alcohols, e.g. polyvinyl acetate. Specified dialdehyde polysaccharides include dialdehyde starch, and the dialdehyde forms of cellulose, dextran and galactomannan. In general, the process is performed in a neutral medium and the mixture of the dialdehyde polysaccharide and macromolecular substance is heated to 60-130 DEG C., especially 90-110 DEG C., suitably by drying the mixture in air at these temperatures. The dialdehyde polysaccaride may be mixed with the macromolecular compound in the dry state and the mixture moistened with solvent and/or water, or an aqueous solution of the dialdehyde polysaccharide may be employed which is dropped or sprayed on the macromolecular compound. Various techniques are described, including the treatment of cellulose ethers while the latter are being converted from fibrous to particulate form. Examples are given.

Abstract translation: 水溶性或无限水溶性大分子碳水化合物或其衍生物，特别是纤维素醚，或聚乙烯醇或其衍生物的溶解度通过在升高的温度下处理而得到改善。 其中二醛多糖的比例为0.1〜5重量％。 前置 二醛是二醛淀粉，但是二醛形式的纤维素和葡聚糖也是非常合适的。 加热是首选。 在90-110℃进行 二醛多糖比现有技术的交联剂（例如乙二醛）更容易处理。

公开(公告)号：US3278092A

公开(公告)日：1966-10-11

申请号：US41634264

申请日：1964-12-07

Applicant: KALLE AG

Inventor： HANS KLETSCHKE ,  HELLMUT SCHNEGGENBURGER ,  HANS MACHOLDT

IPC: B65G53/46 ,  B67D1/14 ,  C23C8/40 ,  F16K5/04 ,  G05D7/01

CPC classification number: B67D1/1405 ,  B65G53/4633 ,  C23C8/40 ,  F16K5/0464 ,  G05D7/018