PolyDADMAC

Structural formula
General
Surname	PolyDADMAC
other names	Polydiallyldimethylammonium chloride PDADMAC Polyquaternium 6
CAS number	26062-79-3
Monomer	Diallyldimethylammonium chloride (CAS number: 28301-34-0)
Molecular formula of the repeating unit	C 8 H 16 NCl
Molar mass of the repeating unit	161.67 g mol −1
Brief description	yellowish
properties
solubility	very soluble in water
safety instructions
GHS labeling of hazardous substances solution no GHS pictograms H and P phrases H: 413 P: no P-phrases
Toxicological data	3250 mg · kg -1 ( LD 50 ,  guinea pigs ,  oral ) 1720 mg kg −1 ( LD 50 ,  mouse ,  oral ) 3000 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

PolyDADMAC is the abbreviation for polydiallyldimethylammonium chloride. This chemical compound is an organic polymer . It is mainly used in paper manufacture to fix contaminants in order to reversibly bind anionic contaminants to the also negatively charged cellulose fiber due to its cationic character .

History and structure

Polymers similar to PolyDADMAC were first produced and investigated in 1957, and it was noticeable that the resulting products were very soluble in water. This was in contrast to all other plastics known at the time , which were made from a polyunsaturated monomer such as 1,3-butadiene . These polymers, such as synthetic rubber, tend to form three-dimensional, cross-linked structures, which are the cause of their insolubility in water. The polyDADMAC monomer diallyldimethylammonium chloride, however, initially forms an intramolecular intermediate which contains a pyrrolidine five-membered ring and only then polymerizes. This structure was proven in 2002 by NMR spectroscopic studies.

use

PolyDADMAC is often used in the paper industry as a fixative and trash catcher. Along with aluminum sulfate, PEI (polyethyleneimine) and dicyandiamide-formaldehyde, it is one of the cationic fixing agents and is mostly used in bulk (in paper manufacture).

safety instructions

In toxicological studies in 1988 on guinea pigs , mice and rats , PolyDADMAC caused increased drowsiness, muscle twitching, reduced growth and impaired lung function in all animals. The substance was found to be moderately toxic when administered orally. The oral LD ₅₀ values ​​found were 1720 mg kg ⁻¹ (mouse), 3000 mg kg ⁻¹ (rat) and 3250 mg kg ⁻¹ (guinea pig).

Individual evidence

1. ↑ ^{a b} safety data sheet at accepta ( memento of the original dated February 2, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
2. ↑ ^{a b} Data sheet Poly (diallyldimethylammonium chloride) solution from Sigma-Aldrich , accessed on May 29, 2011 ( PDF ).
3. ↑ ^{a b c} Entry on PolyDADMAC in the ChemIDplus database of the United States National Library of Medicine (NLM) .
4. ↑ ^{a b c d} HYSAAV. Vol. 53 (3), p. 66, 1988.
5. ^ GB Butler, RJ Angelo: J. Am. Chem. Soc. , 79, 3128 (1957).
6. ↑ W. John, CA Buckley, EP Jacobs, RD Sanderson: Synthesis and Use of PolyDADMAC for Water Purification ( Memento of the original from September 19, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , 2002.