Preparation of alkylated N- or amino, ammonium or spirobicyclic ammonium group-containing, crosslinked polymers
申请人:——
公开号:US20040039086A1
公开(公告)日:2004-02-26
Process for the preparation of alkylated N- or amino, ammonium or spirobicyclic ammonium group-containing, crosslinked polymer gels, which is characterized in that
a) in the crosslinkage step an aqueous solution of a polymer obtained by polymerization of the corresponding monomer is adjusted to a pH of 7.5-14 at a temperature of 0 to 90° C., then the appropriate crosslinking agent is metered in and precrosslinkage is carried out with stirring and the precrosslinked polymer is transferred for complete curing to a curing container, whereupon
b) the cured crude gel is cut into a defined shape, then
c) washed with methanol batchwise in a static or stirred bed and directly following this
d) in methanol, the alkylation is carried out, after which the alkylated gel
e) is first washed batchwise by means of methanol/NaCl washes in a static or stirred bed or continuously, then
f) batchwise by means of NaCl washes and final water washes with deionized water in a static or stirred bed or continuously and also a process for the preparation of the alkylators used in sted d).
Neue Sulfobetaine von Ammoniocarbonsäureamiden und Verfahren zu ihrer Herstellung
申请人:Akademie der Wissenschaften der DDR
公开号:EP0205626A1
公开(公告)日:1986-12-30
Die Erfindung betrifft neue Sulfobetaine sowie Verfahren zur Herstellung dieser Sulfobetaine mit einer Carbonamidgruppe als zusätzlichem polaren Strukturelement.
Synthesebausteine für Sulfobetaine der allgemeinen Formel
(R, und R2: Wasserstoff oder Alkyl, R3 und R4: Alkyl- oder Hydroxyalkylreste, R,: Wasserstoff, Alkylaminocarbonylrest oder Alkylrest und n: 0 bis 3) sind Dialkylallylamine, Halogencarbonsäureester, Amine und Hydrogensulfite, die in teilweise variabler Reihenfolge der Verfahrensschritte zur Umsetzung gebracht werden. Isolierung der Zwischenstufen ist nicht erforderlich. Die Umsetzungen sind technologisch einfach durchführbar, die Ausbeuten sind sehr hoch.
Sulfobetaine von Ammoniocarbonsäureamiden sind als leitfähige Beschichtungs- und Antistatikmaterialien verwendbar. Langkettig substituierte Vertreter der Verbindungsklasse haben wertvolle Tensideigenschaften, die ihre Anwendung als Bestandteil von Wasch- und Reinigungsmitteln, als Flotationsmittel oder als Emulgatoren ermöglichen.
Additive for papermaking and process for papermaking
申请人:JAPAN PMC CORPORATION
公开号:EP0735186A2
公开(公告)日:1996-10-02
A novel additive for papermaking is disclosed. The additive comprises an aqueous solution of a copolymer obtained by reacting (a) an acrylamide, (b) a vinyl monomer which is copolymerizable with component (a) and has a cationic group, (c) at least one of vinyl monomers which are copolymerizable with component (a) and (b) and have 2, 3 or 4 carboxyl groups in a molecule thereof and/or a salt thereof, optionally (e) a nonionic monomer which is copolymerizable with components (a), (b) and (c) if desired, and (d) a cross-linking compound, in the presence of (f) at least one of ethylene glycol, diethylene glycol, diethanolamine and glycerin.
This novel additive for papermaking is able to achieve excellent freeness and yield in the process of papermaking and provides paper with increased strength.
Pigment ink composition capable of forming image having no significant bleeding or feathering
申请人:SEIKO EPSON CORPORATION
公开号:EP0761783A2
公开(公告)日:1997-03-12
An ink for ink jet recording is provided which can form a record having a high color density, free from the occurrence of bleeding or feathering even on recycled paper, and possessing water resistance. An ink composition comprising a pigment dispersible and/or soluble in water without the aid of any dispersant and a glycol ether selected from the group consisting of diethylene glycol mono-n-butyl ether, triethylene glycol mono-n-butyl ether, propylene glycol mono-n-butyl ether, and dipropylene glycol mono-n-butyl ether can realize a print having no significant bleeding or feathering. Further, a high-quality image having much less bleeding or feathering can be realized by an ink jet recording method wherein a reaction solution, containing a reactant, capable of breaking the state of dispersion and/or dissolution of a pigment in the ink composition is brought into contact with the ink composition.
An ink composition for ink jet recording is provided which can realize a good image even on plain paper, specifically an image having high print density and no significant feather or bleeding. A carbon black having on its surface a cationic group is utilized as a colorant. Further, use of this colorant in combination with a color ink containing an anionic material, for example, an anionic dye can realize a good color image free from color-to-color bleeding.