Salts of DEAE-Cottons as Built-in Catalysts for the Cellulose-DMEU Reaction

Abstract

The use of a built-in tertiary amine salt as a catalyst for the reaction of cotton with substituted cyclic ureas has been investigated, with emphasis on the reaction of 1,3-bis(hydroxymethyl)-imidazolidinone-2 (called dimethylolethyleneurea or DMEU). Both organic and inorganic acid salts of diethylaminoethyl (DEAE) cotton have been found to be catalytically active. The effects of reaction temperature, concentration of reagent in the pad bath, and solvent media were studied. DEAE-cotton in the hydroxide form catalyzed the DMEU-cotton reaction only in 1,3-dichloro-2-propanol solvent. The very reactive DMEU could be used as finishing agent in a delayed-cure process with the hydrochloride of DEAE-cotton. A similar tertiary amine hydrochloride catalyst, introduced as an external catalyst in the pad bath, was found to be unsuitable for the delayed-cure process with DMEU.

Electron spectroscopy (ESCA) for analysis of cellulose anion exchangers

“…Diethylaminoethyl (DEAE) cottons have been prepared in aqueous (1)(2)(3)(4) and nonaqueous (5,6) media. These modified celluloses have been used as anion exchangers (7,8), and as substrates (9)(10)(11) for further chemical reactions that are catalyzed by the in situ amino groups. Reacting such weak base anion exchange celluloses with either methyl iodide or ethyl bromide produces quaternization and strong base anion exchange properties (7).…”

“…[8][9][10] 1973, Mention of a proprietary product does not necessarily imply endorsement by the USD A. The Southern Regional Research Center is a facility of the Southern Region, Agricultural Research Service, U.S. Department of Agriculture.…”