Diquaternary ammonium cellulosic fabrics with wrinkle resistant properties
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsDorothy M. Perrier, Ruth R. Benerito
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Abstract
Diethylaminoethyl (DEAE)-Cotton, prepared so that the tertiary amine nitrogens have unshared electrons and are thus in the Lewis-base form, is reacted with an alcoholic solution of an alpha-omega dihaloalkane to quaternize amino groups. The fabric produced by this process is crosslinked between tertiary amine nitrogen groups in cellulose and every alkylene group introduced is connected to two quaternary ammonium ions. The products of this process have strong base anion exchange properties and fabrics of high nitrogen content are imparted both wet and dry crease resistance.
Claims11
A process for producing diquaternary ammonium partial cellulose fibrous ethers, the process comprising reacting tertiary DEAE-cotton ether having a nitrogen content of about from 3.5% to 4.0% and in which the tertiary amine nitrogens have unshared electrons and are thus in the Lewis base form with an alpha-omega dihaloalkane of chain length C.sub.5 to C.sub.10 in organic solvent solution to yield a cotton derivative having substantially for every alkylene group added two amino groups of the original DEAE-cotton changed to diquaternary crosslinks.
A process for producing a fibrous diquaternary ammonium cellulose fabric with ion exchange properties, insoluble in water, and having wrinkle resistant properties in both wet and dry states, the process comprising:
- a. reacting tertiary DEAE-cotton ether fabric of about 4% nitrogen content, and in which the tertiary amine nitrogens have unshared electrons and are in the Lewis base form, with a 20% alcoholic solution containing a quantity of alpha-omega dihaloalkane, wherein the moles of alpha-omega dihaloalkane to available tertiary DEAE sites are in excess, and the alpha-omega dihaloalkane is selected from the group consisting of diiodoalkanes, dibromoalkanes, and dichloroalkanes having a chain length of from C.sub.5 to C.sub.10, to yield a cotton derivative having substantially for every alkylene group added two amino groups of the original DEAE-cotton changed to diquaternary crosslinks and
- b. washing the fibrous quaternary product thus produced, with absolute methanol or ethanol at room temperature to remove all unreacted substances.
Dependencies are inferred from the claim text.