Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Halogen or compound containing same
Patent
1996-06-06
1998-04-21
Wood, Elizabeth D.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Halogen or compound containing same
502203, 502202, 502217, 8120, 252 861, B01J 27138, B01J 2102, D06M 1300, D06M 900
Patent
active
057417539
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an essentially nitrate-free catalyst for the wash-and-wear finishing of textiles with formaldehyde-free crosslinkers.
Owing to the persistent controversy about the use of formaldehyde-containing auxiliaries in the textile industry, there is an increasing trend in the wash-and-wear finishing of textiles toward using formaldehyde-free crosslinkers, for example those of the formula I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 -C.sub.3 -alkyl, with the proviso that at least one of R.sup.1 and R.sup.2 is C.sub.1 -C.sub.3 -alkyl, and R.sup.3 and R.sup.4 are each hydrogen or C.sub.1 -C.sub.4 -alkyl.
However, under textile bulk-scale production conditions, the finished material is occasionally observed to give off an extremely unpleasant odor, which was not noticed in the market launch phase of these crosslinkers. This odor is apparently the result of a catalytic decomposition of the crosslinker at elevated (curing) temperatures. The decomposition products are highly volatile compounds which are responsible for the odor nuisance manifest in the finished material--especially already made-up and airtightly packaged merchandise.
EP-A 515 900 discloses a chloride-free catalyst for the wash-and-wear finishing of textiles with formaldehyde-free crosslinkers comprising magnesium and tetrafluoroborate ions in a molar weight ratio of from 1:0.1 to 1:4. This catalyst does in many cases bring about a significant reduction in the odor problem mentioned, but further improvement would be desirable. Furthermore, the finishing properties are still in need of further improvement.
It is an object of the present invention to provide a catalyst system giving more effective avoidance of the odor nuisance and having still better finishing properties.
We have found that this object is achieved by an essentially nitrate-free catalyst for the wash-and-wear finishing of textiles with formaldehyde-free crosslinkers, comprising magnesium, tetrafluoroborate, chloride and sulfate ions in the molar weight ratios of
In a preferred embodiment, the essentially nitrate-free catalyst used comprises magnesium, tetrafluoroborate, chloride and sulfate ions in the molar weight ratios of especially 1:0.45 to 1:0.8, especially 1:2.05 to 1:3, and especially 1:0.5 to 1:1.0.
The molar weight ratio is defined as the ratio of the respective products P.sub.i of the ion varieties i under consideration, P.sub.i being calculated by the equation ##EQU1##
If an ion variety i occurs in more than one of the salts used, the products P.sub.i of this ion variety are summed before the ratio is formed.
The catalyst of this invention is preferably used in the form of an aqueous solution comprising from 15 to 40% by weight, preferably from 20 to 35% by weight, of salt. The magnesium, tetrafluoroborate, chloride and sulfate ions may be introduced into such a solution in salt form, for example as magnesium sulfate, chloride, phosphate, acetate, glycolate, citrate or adipate, sodium chloride, potassium chloride, lithium chloride or zinc chloride or sodium tetrafluoroborate, lithium tetrafluoroborate, potassium tetrafluoroborate or zinc tetrafluoroborate. Particular preference is given to the use of magnesium sulfate, sodium chloride, lithium chloride and sodium tetrafluoroborate.
The absence of nitrate ions has a beneficial effect on the lightfastness of the finished textiles.
The catalyst of this invention is used in the wash-and-wear finishing of textiles, especially of cotton and cotton-polyester blend fabrics, in the manner which is customary for example for magnesium chloride; the amounts used range from about 30 to 50 parts by weight of a, for example, 20% strength by weight solution, based on 100 parts by weight of the crosslinker (45% strength by weight solution). The catalyst of this invention requires no departure from existing methods of wash-and-wear finishing.
The present invention also provides a process for the wash-and-wear finishing of textiles with formaldehyde-free crosslinkers, which comprises using the c
REFERENCES:
patent: 3807952 (1974-04-01), Lauchenauer
patent: 5246904 (1993-09-01), Hois et al.
Hois Pia
Simenc Toni
BASF - Aktiengesellschaft
Hailey Patricia L.
Wood Elizabeth D.
LandOfFree
Nitrate-free catalyst for the wash-and-wear finishing of textile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nitrate-free catalyst for the wash-and-wear finishing of textile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nitrate-free catalyst for the wash-and-wear finishing of textile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2057470