Spin finished aramid fibers and use thereof
AssigneeHoechst Aktiengesellschaft
InventorsGerhard Stein, Richard Neuert
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Abstract
Novel aramid fibers with a spin finish having useful properties for the production of sheet materials are described in the present application. The aramid fibers contain at least three elements including an anionic antistat based on phosphoric, phosphonic, or phosphoric and phosphonic esters; a compound of the formula .sup.1 --COO--(CH.sub.2 --CH.sub.2 --O--).sub.x --R.sup.2 ; and a compound of the formula R.sup.2 --O--(R.sup.4 --O).sub.y --R.sup.5, wherein R.sup.1 is alkyl or alkenyl, x is an integer from 2 to 20 R.sup.2 is hydrogen or alkyl, R.sup.3 is alkyl or alkenyl, y is an integer from to 8, R.sup.4 is ethylene, propylene, or butylene, and R.sup.5 is alkyl.
Claims17
An aramid fiber having a spin finish comprising
- A) an anionic antistat based on phosphoric esters, phosphonic esters, or a mixture of phosphoric and phosphonic esters,
- B) a compound of the formula I
- R.sup.1 --COO--(CH.sub.2 --CH.sub.2 --O--).sub.x --R.sup.2 (I) and
- C) a compound of the formula II
- R.sup.3 --O--(R.sup.4 --O).sub.y --R.sup.5 (II),
- where
- R.sup.1 is C.sub.1 -C.sub.22 -alkyl or C.sub.2 -C.sub.22 -alkenyl,
- x is an integer from 2 to 20
- R.sup.2 is hydrogen or C.sub.1 -C.sub.22 -alkyl,
- R.sup.3 is C.sub.1 -C.sub.22 -alkyl or C.sub.2 -C.sub.22 -alkenyl,
- y is an integer from 1 to 8, and
- R.sup.4 is ethylene or, when y is 2, 3, or 4, some of the R.sup.4 radicals can also be propylene or butylene, and R.sup.5 is C.sub.1 -C.sub.22 -alkyl.
The aramid fiber of claim I where the amount of spin finish is from 0.5 to 4% by weight, based on the amount of fiber.
The aramid fiber of claim I where the anionic antistat is a salt of a mono- or dialkyl phosphate, a salt of a mono- or diaryl phosphate, a salt of an alkylphosphonic ester, a salt of an arylphosphonic ester or m mixture thereof.
The aramid fiber of claim I where R.sup.3 is C.sub.12 -C.sub.20 -alkyl.
Dependencies are inferred from the claim text.