Surface treated aramid fibers and a process for making them
AssigneeE. I. Du Pont de Nemours and Company
InventorSerge Rebouillat
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Abstract
The invention relates to highly processable, hydrophobic aramid fibers of high modulus, improved surface frictional properties, scourability, low abrasion depositing, low fibrillation obtainable by surface reaction of an aromatic polyamide fiber with a surface reactant comprising a ketene dimer [R.sup.1 R.sup.2 C.sub.2 O][R.sup.1 R.sup.2 C.sub.2 O] (I). The invention further relates to a process for the production and the use of said fibers.
Claims10
An aramid fiber having a surface coated by a reaction product of the aramid and a surface reactant wherein the reaction product was formed at the surface of a never-dried aramid fiber, wherein the surface reactant was applied to the aramid fiber while the aramid was swollen with 15 to 200 percent water, the reaction product was formed, and the coated aramid fiber was dried, and wherein the surface reactant comprises a ketene dimer of the general formula
- [R.sup.1 R.sup.2 C.sub.2 O].multidot.[R.sup.1' R.sup.2' C.sub.2 O](I)
- wherein each of the groups R.sup.1 and R.sup.1', which may be same or different, represents an alkyl, cycloalkyl, aryl, alkenyl, aralkyl, aralkenyl, or alkaryl, having from 4 to 32 carbon atoms;
- and each of the groups R.sup.2 and R.sup.2', which may be same or different, represents a hydrogen atom or an alkyl or alkenyl group having from 1 to 6 carbon atoms.
Dependencies are inferred from the claim text.