DADMAC

Allyl polymers are made by free-radical polymerization of diaHyl compounds, most frequently diallyl dimethyl ammonium chloride (DADMAC) [7398-69-8] forming a chain containing a five-membered ring (28) poly(DADMAC) [26062-79-3]. 

Until 1990 the EPA maintained a Hst of chemicals suitable for potable water treatment ia the United States. Siace then the entire question of certification and standards has been turned over to a group of organi2ations headed by the National Sanitation Eoundation, which has issued voluntary standards. As of January 1992, standards had been issued for most of the principal inorganic products, but only for two polymers, poly(DADMAC) and Epi-DMA (epichl orohydrin dimethyl amine) polymers (78). Certifications for commercial products meeting specified standards are issued by the National Sanitation Eoundation, Underwriter Laboratories, and Risk Eocus/Versar (79). 

Polyamine/DADMAC (polydiallyldimethylammonium chloride) Cationic coagulant. Also generally supplied as solution liquids in ranges from 40 to 70% active strength. Low MW, from 0.25 to 0.75M. Useful for reclaiming oily waste waters typically use at 150 to 300 ppm. 

Alum plus DADMAC or EPIDMA, and PAC plus DADMAC or EPIDMA Various combinations are now available with polymer strengths of from 2.5 to 25%, providing convenience, and often approved by the U.S. Environmental Protection Agency (EPA) for use at up to 60 to 75 ppm product. 

Polyamine/DADMAC polymers Polyamine/EPIDMA polymers Polyamines... 

Copolymers from the monomers AMPS, diallyldimethylammonium chloride (DADMAC), N-vinyl-N-methylacetamide (VIMA), acrylamides, and acrylates are particularly useful for fluid loss additives [824]. The molecular weights of the copolymers range from 200,000 to 1,000,000 Dalton. The copolymers are used in suspensions of solids in aqueous systems, including saline, as water binders. In these systems, the water release to a formation is substantially reduced by the addition of one or more of these copolymers. 

Both poly(DMA-co-EPl) and poly(DADMAC) have been widely used in the field in acidizing, hydraulic fracturing, sand control, and other well treatments (12). 

Table IV. Effectiveness of poly(DADMAC) as a Swelling Clay Stabilizer When Used in Cement Slurries...

Fluid Injected Flow Rate After poly(DADMAC) Treatment... 

Results indicated that poly(DADMAC) will reduce damage caused by contact of low salinity fluid lost from the cement slurry with swelling clays present in the formation. An increase in poly (DADMAC) molecular weight from 600,000 to 2.6 X 10 daltons resulted in a decreased polymer effectiveness. The test columns were of relatively high permeability so the thickness of the adsorbed polymer layer, predicted to be greater for the higher molecular weight polymer, would have little effect on the observed flow rates. 

Polymers BA Butylacrylate, CHP 3-chloro-2-hydroxypropyl, DADMAC Diallyldimethylammonium chloride, DMAEA Dimethylaminoethylacrylate,DMAEM Dimethylaminoethylmethacrylate, EM Epichlorohydrin Modified, EIMAOETMAC Hydroxymethacryloxyethyltrimethylammoniumc chloride, MAOEDMAC Methacryloxyethyldimethylammonium chloride, MAOETMAC Methacryloxyethyltrimethylammonium chloride, MDMAEM Methyldimethylaminoethylacrylate, M2VP l-methyl-2-vinylpyridinium bromide,M4VP l-methyl-4-vinylpyridinium bromide,NIPAM N-isopropylacrylamide,PEI Polyethyleneimine, Q Quaternary, VBTMAC Vinylbenzyltrimethylammonium chlroide,VP Vinylpyridinium. 

CMC carboxymethylcellulose DADMAC polydiallyldimethylammoinum chloride C concentration of polymer (wt%) SOL soluble complex ... 

DADMAC Dialkyl- K - STPs-influents 375-4300 pg L 1 conditions. Poorly anaero-... 

Fig. 6 General structures of the most important surfactants and metabolites alkylphenol polyethoxylate (APE) alkylphenol (AP) alkyl ether (AE) alkylphenol ethoxy carboxylate (APEC) linear alkylbenzenesulfonates (LAS) alkyltrimethylammonium compounds (ATMAC) dialkyldimethylammonium compounds (DADMAC) alkyldimethylbenzylammonium compounds (ADMBAC) esterquat (EQ) diesterquats (DEQ). X is usually a chlorine or bromine atom. DDAC (didecyldimethylammonium chloride) and BDD12AC (benzyldimethyldode-cylammonium) are the two target analytes with a reported immunochemical technique developed for their analysis [153,154]...

Polycyclopentene, 16 112 PolyDADMAC, 20 472. See also Polydiallyldimethylammonium chloride (DADMAC)... 

Polydextrose, 4 702, 724t 12 43 Polydiallylammonium cationics, 20 472 Polydiallyldimethylammonium chloride (DADMAC), in paper manufacture, 18 117... 

Wilczak A, Assadi-Rad A, Lai FTH, Hoover LL, Smith JF, Berger R, Rodigari F, Beland JW, Lazzelle LJ, Kincannon EG, Baker H, Heaney CT (2003) Formation of NDMA in chloraminated water coagulated with DADMAC cationic polymer. J Am Water Works Assoc 95(9) 94-106... 

The importance of intramolecular cyclization was emphasized when Butler and coworkers found that the radical polymerization of N, N, N, /V-diallyldimethylammonium chloride (DADMAC) gave soluble, uncrosslinked polymers with little or no unsaturation (Eq. 6-101) [Butler and Angelo, 1957 Butler and Ingley, 1951 Wandrey et al., 1999]. There is a very low tendency for radical IV to propagate intermolecularly and undergo crosslinking. The predominant reaction is intramolecular cyclization, and the product is a linear product with cyclic structures in the backbone. The reaction is referred to as alternating intra/intermolecular polymerization or cyclopolymerization. 

Polymers of N, N, N, A-diallyldimethylammonium chloride (DADMAC) (and its copolymers with acrylamide) are allyl resins in terms of the monomers used but are very different in properties since they are not crosslinked. Cyclopolymerization is the mode of reaction (Sec. 6-6b) and the polymers are water-soluble. Applications include potable and wastewater treatment (flocculation aid) and paper and textile industries (antistatic coating, reinforcement, color removal). 

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