Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece
Patent
1997-03-06
1998-07-07
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
264203, 26421114, D01F 1102, D06M 15564
Patent
active
057763941
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a novel process for producing solvent-spun cellulose fibers having a reduced tendency to fibrillate by treating the fibers with certain reactive compounds.
2. Discussion of the Background
GB-A-2 043 525 discloses the production of cellulose fibers by spinning a solution of cellulose in a suitable solvent, for example an N-oxide of a tertiary amine, such as N-methylmorpholine N-oxide. In such a spinning process, the cellulose solution is extruded through a suitable die and the resulting fiber precursor is washed in water and thereafter dried. Such fibers are referred to as solvent-spun fibers.
Such solvent-spun cellulose fibers have many application advantages, but tend to fibrillate, i.e. to break up into very fine fibrils, which can lead to problems with the textile processing of cellulose fibers.
WO-A-92/07124 recommends solving this problem by treating the cellulose fibers with an aqueous solution or dispersion of a polymer having a multiplicity of cationically ionizable groups, for example a polyvinylimidazoline.
Furthermore, EP-A-538 977 teaches the use of compounds having from 2 to 6 functional groups capable of reacting with cellulose, for example products based on dichlorotriazine, for this purpose.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel process for producing solvent-spun cellulose fibers having a reduced tendency to fibrillate on the basis of different chemical defibrillating reagents.
We have found that this object of producing solvent-spun cellulose fibers having a reduced tendency to fibrillate is advantageously achieved by a process which comprises treating the fibers with one or more compounds from the group of the alkoxy-ethyleneureas,
In a preferred embodiment, compounds (A) comprise N-methylol ethers of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.10 -alkyl with or without interruption by unadjacent oxygen atoms, with or without hydroxyl and/or C.sub.1 -C.sub.4 -alkoxy substitution and with or without interruption by unadjacent oxygen atoms and/or C.sub.1 -C.sub.4 -alkyl-bearing nitrogen atoms, and with or without interruption by unadjacent oxygen atoms, or the group (--NR.sup.2 --CH.sub.2 OR.sup.1), R.sup.3 =(--NR.sup.2 --CH.sub.2 OR.sup.1), moreover, two such rings may be fused together via the carbon atoms on the R.sup.2 radicals a-disposed to the amide nitrogens to form a bicyclic system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The N-methylol ethers I are readily obtainable by conventional reaction, usually in aqueous solution, of the corresponding N-methylol compounds of the general formula II ##STR2## with alcohols of the general formula III interruption by unadjacent oxygen atoms, such as --CH.sub.2 CH.sub.2 OCH.sub.3, --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.3 or --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 OCH.sub.3. Further examples of R.sup.1 are n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, n-hexyl, 2-ethylhexyl and 2-methoxyethyl; of particular interest are the C.sub.1 -C.sub.3 -alkyl groups ethyl, n-propyl, isopropyl and especially methyl.
The radical R.sup.2 is hydrogen, CH.sub.2 OR.sup.1 or, in particular, a C.sub.1 -C.sub.8 -alkyl radical with or without hydroxyl and/or C.sub.1 -C.sub.4 -alkoxy substitution and with or without interruption by unadjacent oxygen atoms and/or C.sub.1 -C.sub.4 -alkyl-bearing nitrogen atoms.
The radical R.sup.3 is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.10 -alkoxy with or without interruption by unadjacent oxygen atoms or, in particular, the group (--NR.sup.2 --CH.sub.2 OR.sup.1).
The process of this invention is particularly effective with those N-methylol ethers I where R.sup.2 and R.sup.3 form a five- or six-membered ring. If R.sup.3 =(--NR.sup.2 --CH.sub.2 OR.sup.1), moreover, two such rings may be fused together via the carbon atoms on the R.sup.2 radicals .alpha.-disposed to the amide nitrogens to form a bicyclic system.
Examples of N-methylol ethers I which can be u
REFERENCES:
Abstract of Japan 6-146,168 (Published May 27, 1994).
Badura Wolfram
Schrott Wolfgang
BASF - Aktiengesellschaft
Tentoni Leo B.
LandOfFree
Process for manufacturing cellulose fibres does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for manufacturing cellulose fibres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing cellulose fibres will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1202142