Acrylamide resins

Beaded acrylamide resins (28) are generally produced by w/o inverse-suspension polymerization. This involves the dispersion of an aqueous solution of the monomer and an initiator (e.g., ammonium peroxodisulfates) with a droplet stabilizer such as carboxymethylcellulose or cellulose acetate butyrate in an immiscible liquid (the oil phase), such as 1,2-dichloroethane, toluene, or a liquid paraffin. A polymerization catalyst, usually tetramethylethylenediamine, may also be added to the monomer mixture. The polymerization of beaded acrylamide resin is carried out at relatively low temperatures (20-50°C), and the polymerization is complete within a relatively short period (1-5 hr). The polymerization of most acrylamides proceeds at a substantially faster rate than that of styrene in o/w suspension polymerization. The problem with droplet coagulation during the synthesis of beaded polyacrylamide by w/o suspension polymerization is usually less critical than that with a styrene-based resin. 

M. C. P. Leblanc, J. A. Durrieu, J. P. Binon, G. G. L. Provin, and J. J. Fery. Process for treating an aqueous solution of acrylamide resin in order to enable it to gel slowly even at high temperature (procede de traitement d une solution aqueuse de resine acrylamide pour en permettre une gelification lente meme a temperature elevee). Patent EP 267835, 1988. 

TABLE 6.1. Preparation of Di-/ -PEPTOIDS 9 FROM ACRYLAMIDE RESIN 3 AND AMINES 8... 

Matejka, Z. Zitkova, Z. The sorption of heavy-metal cations from EDTA complexes on acrylamide resins having oligo(ethyleneamine) moieties. React. Funct. Polym. 1997, 35, 81-88. 

For the third set of films, the 0.5, 1.0, and 1.5 mole acrylamide resins at 70% in TPGOA were formulated with 3% Darocur 1173. These formulations also included 2% CG21-746 UV deblockable PTSA from Ciba Geigy. Films were prepared as above and evaluated using isothermal OHA. Figure 13 shows that as the level of acrylamide functionality is increased from 0.5 to 1.5 moles the initial crosslink density is increased, with the largest increase between 0.5 and 1.0 moles of acrylamide. Thermal cure occurs with all resins, with the fastest Increase in modulus seen with the 0.5 mole AH which has the most remaining alkoxy functionality. 

TEGO Dispers 715 W [Tego http //www.additiweb.com] Tego GmbH http //www.tego.de]] Tephaprint RV t[Cog n is/Texti Ies http //www. cognis. com] Sodium polyacrylate-acrylamide resin Definition Produced by polymerization and subsequent hydrolysis of acrylonitrile in a sodium silicate-sodium hydroxide aq. sol n. 

Sodium polyacrylate-acrylamide resin scale control agent, organic beet sugar/cane sugar processing... 

Sodium polyacrylate-acrylamide resin scale control agent, soil removal Acrylic acid/sulfonic acid/sodium styrene sulfonate terpolymer sodium salt scale control agent, water treatment Acrylic acid/sulfonic acid/sodium styrene sulfonate terpolymer sodium salt scale inhibitor... 

Thermomorphie polymerie ligands based on poly (lV-isopropyl)acrylamide resin were tested in the reaction in aqueous organic solvent, as well as neat water (Scheme 68). ... 

Preparation and use of a cross-linked polydimethyl acrylamide resin for peptide synthesis... 

Synocryl 836S (Cray Valley Ltd) is a methylolated acrylamide resin, 60 %nvc in a 50 50 mix of n-butanol and xylol. It has limited solubility in alcohols and white spirit... 

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