LNC
Technical Presentation
COMPARISION OF MODQUEST-FSN & DEKOL-FBSN Modquest- FSN & other similar products such as DEKOL-FBSN (BASF), Hoquest – 1097(Colour chem.), Sokalan- CP- 5( BASF), Acusol-479N (Rohm & Haas) are all acrylic co-polymers of varying molecular weight designed for applications in textile wet processing & water treatment. Modquest-FSN / Dekol-FBSN/Sokalan-CP-5 are products of similar chemistry & has an approximate molecular weight of 70,000. These are non-surface active in nature & hence are non foaming, making them suitable for application on new generation high turbulance equipments such as jets, soft flow machines, continuous process systems amongst others. The Modquest- FSN exhibits following properties. CHELATION/SEQUESTRATION DISPERSING/DEAGGLOMERATING PROTECTIVE COLLOID WATER SOFTENING
CHELATION/SEQUESTRATION Modquest-FSN is a solution co-polymer in which polymerization of co-monomers is so carried out to achieve right sequestration value suitable for chelating hardness causing ions already present in water (Ca, Mg, Fe) & also hardness released from cellulosic fibres during its wet processing As in all textile operations of washing, scouring ,bleaching & dyeing the quality of water used is of great importance. WASHING :The salt of Ca , Mg & Fe present in most water are very objectionable. When soap is added to such water no lather is at first produced, a turbid solution is formed and curds of sticky insoluble soaps eventually produced.The sticky insoluble calcium and magnesium soaps, which are precipitated may deposit irregularly on the goods and uneven dyeing is sure to follow. The effect of iron in water, used in dyeing mordant colours on wool is to sadden or dull shade. The finishing of cotton and rayons is often affected by the calcium and magnesium salts in water particularly where emulsions or softeners are used. Both naturally will prevent the precipitation of soaps, oils, finishes, sizes and dyes with the hardness forming salts in water. It will also condition the water against attachment on pipe lines and thus decrease the amount of iron taken up in solution.
SCOURING : The removal of waxes, oils and fats, sizes and others from textile is important in their manufacture. In kier boiling, 3-5% of caustic soda is usually used
2 with the assistants such as soaps. The addition of MODQUEST-FSN to the caustic soda solution will prevent precipitation of silicate, metallic soaps, pectins etc. It will inhibit catalystic oxidation of cotton & rayon. It improves whiteness & inhibits yellowing in storage, in white cotton processing.
BLEACHING : It can be used as bleach stable additive into silicate containing and silicate free bleaching baths providing bleached goods of high whiteness and quality.
Comparative Chelating Value at various pH /Room temp Sr. Product Chelating value at various pH /. No. 10 11 12 13 Modquest1 86 78 77 76 FSN
2
Dekol-FBSN
86
77
76
74
Table.No.1
COMPARATIVE CHELATING VALUE OF MODQUEST-FSN AGAINST DEKOL-FBSN AT VARIOUS pH & CONSTANT TEMP 88 86 Chelation value
84 82
MFSN
80
DFBSN
78 76 74 72 70 68 10
11
12 pH
Fig.No. 1
13
3
Comparative Chelating Value at various pH / temp.(95ºC) Sr. No.
Product
1
ModquestFSN
2
Dekol-FBSN
Chelating value at various pH / temp. 10/95º 11/95º 12/95º 13/95º C C C C 79 78 76.5 76.0 79
77
75.5
74.5
Table 2
COMPARATIVE CHELATING VALUE OF MODQUEST-FSN AGAINST DEKOL-FBSN AT VARIOUS pH & 95ºC TEMP 80
Chelation value
79 78 MFSN
77
DFBSN 76 75 74 73 72 10
11
12
13
pH
Fig. 2 REMARK: MODQUEST-FSN exhibits better chelation value at various pH & temperature in comparision to DEKOL-FBSN Dyeing : The manipulated chelation value of Modquest-FSN have no tendency to sequester/demetalize metal ions present in reactive/vat/sulfur & other anionic dyes preventing any tone changes. M-FSN is a product with an equilibrated chelation value so that it will not extract metals from dyestuffs & does not cause un-levelness on fabrics.
4
DISPERSING/DEAGGLOMERATING Dispersing of the sequestered ions from the fibres & hardness of water SCOURING & DISPERSING ABILITY : Modquest-FSN exerts an outstanding dispersing effect on the impurities in raw cotton (e.g. waxes & pectinates) and on the precipitates caused by hard water. Modquest-FSN helps to disperse salts released from fibers and shows good iron (Fe) & Calcium (Ca) binding properties. Regarding compatibility of Modquest-FSN / Dekol-FBSN & Calcium Chloride. Sr. No. 1
2
Product ModquestFSN / DekolFBSN Calcium chloride solution(10 %) Remarks
I
II 90
III
IV
MODQUEST-FSN / DEKOL-FBSN (10% ) 75 85 90
10
25
15
10
White thick layer dissolves immediately under stirring
White lumped dissolves over night without stirring
White layer dissolves within 1520 mins. without stirring
White layer dissolves within 5 mins. without stirring
Table 3
Sr. No.
1 2 3
ModquestFSN/DekolFBSN
Volume
1000 ppm Calcium chloride required for precipitation
100 gpl 10 gpl 2 gpl
100 ml 100 ml 100 ml
1500 ml 150 ml 30 ml Table 4
Remark: Above precipitation is visually observed. No gelatinous mass or lumps are observed. Modquest-FSN exerts an outstanding dispersing effect on the impurities in raw cotton (e.g. waxes & pectinates) and on the precipitates caused by hard water. Dispersing efficiency of Modquest-FSN and Dekol-FBSN studied on Titanium Dioxide pigment.
5 Sr. No.
% of Titanium Dioxide
Dispersing efficiency
1
% of ModquestFSN / DekolFBSN NIL
1
2
0.1
1
3 4 5 6
0.1 0.1 0.1 0.1
3 5 7 10
UNSTABLE-SEPERATION WITHIN 510 MINS STABLE FOR 8 HRS, SECOND DAY SHOWS 5 % SEPERATION ON TOP “ “ “ “
Table 5 CONCLUSION : Both Modquest-FSN & Dekol-FBSN exhibits similar dispersing efficiencies with Titanium Dioxide i.e. inorganic pigment ( Stability observed for more than 8 hrs)
•
Without product Titanium Dioxide dispersion is very weak. Gives immediate sedimentation
BLEACHING : Reduced damage to bleaching machine and improved operation rate.
Adherence of Scale to L-Box (pre-heater guide roll)
Scale Formation
No scale formation with Modquest-FSN Fig 3
6
Adherence of scale to Horizontal washer (touch bar)
Scale Formation
No scale formation with Modquest-FSN
Fig. 4 • • •
Reduced damage to bleached good (crease marks, texture disorder, harsh handle etc) For bleaching purposes water containing iron is very objectionable because it often gives a yellowish cast to bleached materials. Capability to chelate & disperse heavy metal ions and anti catalyzing effect against decomposition of hydrogen peroxide.i.e. prevention of metal ion related process trouble. Improvement in quality of bleached goods realising reduced strength loss & reduced possibility of pin holes.
. .
.
. .
Pin holes produced on thin cotton fabric after bleaching
Reduced Pin holes produced on thin cotton fabric after bleaching
Fig. 5
DYEING: It is also responsible for the following effects if hard water is used for dyeing of raw cotton with reactive and direct dyes.
Is a very effective dispersant for calcium carbonate thus formed and maintains it in a finely dispersed state. As a result, opalescence of the dyeing liquor is avoided. It suppresses the formation of calcium salts of reactive dyes hydrolysates that are difficult to wash out during reactive dyeing.
7 It can prevent precipitation (re-deposition) of the substances released from the cotton in alkaline baths & of non-saponifiable accompanying impurities during the dyeing of cotton & its blends. Has ability to disperse & prevent agglomeration of dyestuffs during the dyeing operation. Will increase solubility of precipitating salts by threshold effect i.e. adsorption on small seeds of precipitates & prevents their growth and agglomeration. This reduces precipitation & scale formation of inorganic salts along with hardness causing ions which could otherwise deposit on fabrics in the rinse bath. Employed in dyeing processes to improve solubility and dispersion of dyestuffs. They will prevent aggregate formation, which cause un-levelness on fabrics. Ensures consistent results in dyeing of reactive dyes & increases the colour yield in hard water in comparison to Dekol-FBSN .(Folder enclosed for your reference.) Improves fastness properties of dyeings with direct dyes & promotes removal of hydrolyzed dyes in soaping of reactive dyed fabrics. In many cases prevents filtering off in dyeing wound packages.
PROTECTIVE COLLOID •
•
The hydrolyzed reactive dye- stuffs are thus dispersed into the bath and conventionally dispersed. It prevents aggregates of insoluble vat dyes which cause spots on dyed materials. Modquest-FSN contribute to protect dyes against further hydrolysis and are considered as protective colloids. Modquest-FSN is an effective protective colloid and dispersants to prevent precipitation of mineral salts and avoids settling and scaling on fibers and machineries.
WATER SOFTENING Modquest-FSN/Dekol-FBSN in general is sequestering agent for polyvalent ions of many metals such as calcium, magnesium, iron, copper, nickel, zinc and lead. The polyphosphates widely used in softening water, are unstable at elevated temperatures and incompatible with some materials, while it is suited for treatment of water for boilers because of its stability under high pressure and high temperature. The % amounts of Dekol-FBSN to soften hard water:
Table.No.6 PH PPM
500 1000 1500 2000
7
0.8625 1.725 2.588 3.45
8 0.8625 1.725 2.588 3.45
9 0.95 1.9 2.85 3.8
10 0.96 1.925 2.888 3.85
11 0.988 1.975 2.963 3.95
8 % AMOUNT OF DEKOL-FBSN TO SOFTEN HARD WATER
4.5 4 3.5 N3 S B 2.5 F L2 O K 1.5 E D F1 O 0.5 % 0
pH 7 pH 8 pH 9
HARDNESS IN PPM
500
100
Fig. 6 150
The % amounts of Modquest-FSN to soften hard water: Table.No.7 PH PPM 7 8 9 500 0.825 0.825 0.888 1000 1.65 1.65 1.775 1500 2.475 2.475 2.663 2000 3.3 3.3 3.55
2000
10 0.938 1.875 2.813 3.75
11 0.95 1.9 2.85 3.8
% AMOUNT OF MODQUEST-FSN TO SOFTEN HARD WATER 4 3.5
N3 S F 2.5 T S E2 U Q 1.5 D O M1 F O 0.5 %
pH 7 pH 8 pH 9 pH 10 pH 11
0 500
1000
1500
2000
HARDNESS IN PPM
Fig.No. 7 Conclusion : Modquest-FSN shows better water softening property than DekolFBSN The information in the datasheet is based on our present state of knowledge & is published without any obligation on our part.