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Hydroxyethyl cellulose HEC details

Hydroxyethyl cellulose HEC details

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Hydroxyethyl cellulose HEC details

Hydroxyethyl cellulose HEC details
● hydroxyethyl cellulose
Hydroxyethyl cellulose is a high-purity chemical cotton or pulp and the alkali-catalyzed reaction of ethylene oxide is made.
Hydroxyethyl cellulose ideal structure:

 
Hydroxyethyl cellulose (HEC) applications
● Agriculture
Hydroxyethyl cellulose (HEC) used in water-based spray in the agent can effectively suspended solids.
HEC used in spray operations adhesion agents can play a role in leaf surface; HEC can be used as a thickener in latex spray, drift reduction agents, thereby increasing the use of foliar spray effect.
HEC can also be used as a seed coating film-forming agent; used as a binder leaf recycling.
● Building materials
HEC can be applied to plaster, cement, lime and mortar systems, tile adhesives and mortar. In the cement component in it can be used as retarders and SAR. Operations in the wall surface treatment, it is applied to the preparation of latex body to relieve pre-wall pressure at the surface and make brushing paint and surface coatings better; it can be used as wallpaper adhesive thickener.
HEC can be applied by increasing the curing time and improve the performance of gypsum plaster. In compression, anti-distortion strength and stability of space, HEC better than other cellulose effects.
● cosmetics and detergents
HEC in shampoo, hair spray, neutralizer, hair care agents and cosmetics is an effective film-forming agent, binder, thickener, stabilizer and dispersing agent. Its thickening properties and protective colloid can be used in liquid detergents and solid detergent industry. HEC dissolves quickly at high temperatures, can speed up the production process, improve production efficiency. As we all know, with the detergent was marked by HEC to improve the fabric is smooth and silky nature.
● latex polymer
Choose a certain molar substitution degree HEC, protective colloid aggregation in the catalytic process can achieve the best results; the growth of polymer particles in the control, stability, latex and high temperature performance and low temperature, mechanical shear in, HEC can play the best results. In the latex polymerization process, HEC may be a protective colloid concentration in the critical range, and control the size of polymer particles and reactive group to participate in freedom.
● oil
HEC processing and filling in the mud with increasing viscosity. It helps provide a good low-solid mud, and can reduce the hole minimum damage. HEC thickened slurry with easy acids, enzymes or oxidizing degradation of hydrocarbons and maximizing the recovery of oil.
Rupture in the mud, HEC can play the role of sediment carried. These fluids can easily be more acid, enzyme or oxidant degradation.
HEC can be formulated with the ideal low-solid drilling fluid, which provides greater penetration and better drilling stability. The rejection characteristics of the fluid can be used in hard rock drilling in the layer structure, the same applies to Bengtan or slippery layer of drilling slump page.
Cement operations in the filling, HEC reduces pore pressure slurry friction, so that the loss of water damage to the structure reduced to a minimum.
● Paint thickener
HEC latex-containing components with fast dissolving, low foam, good thickening effect, color and good scalability and a more stable performance. It helps non-ionic properties of the PH value in a wide range of stable and allow for a wide range of formulations.
XT series of superior performance is at the beginning of pigment grinding thickener when added to the water to control hydration.
High viscosity grade XT-20, XT-40, XT-50 was developed primarily used in the production of water-soluble paint, and the amount compared to other thickeners are small.
● Paper and ink
HEC can be used as paper and cardboard polish and protect the adhesive ink. HEC is not in the printing on the paper with the advantages of size, can be used for high-quality screen printing at the same time, owing to its low permeability and strong surface gloss can also reduce costs.
It can be applied to any size of printing paper or cardboard or calendar printing. Glue on the paper, its dosage is usually 0.5 to 2.0 g / m 2.
HEC increase the paint color in the water conservation performance, especially for the high proportion of latex paint performance is more prominent.
In the papermaking process, HEC there are other superior properties, including the vast majority of gums, resins, and inorganic salts of compatibility, solubility, low foam, less oxygen and can form a smooth surface film.
In the manufacture of ink, HEC is used for the production of water-based ink copy, which can be quick-drying ink, and color is good and no diffusion bonding.
● fabric sizing
HEC long yarn and fabric materials used for sizing and finishing, this glue can be washed from the fibers can wash. Mixed with other resins in, HEC can be more widely used in textile processing, in which glass fibers are used as a forming agent and binder, the slurry in the leather and adhesives can be used as modifiers.
● fabric latex paints, adhesives and adhesive
HEC is a thickening of the adhesive with a pseudo-plastic, that is, they are under shear thinning, but quickly returned to the high viscosity under the control of and improve the printing resolution.
HEC can control the release of water and allowed to flow continuously without increasing the printing on the adhesive roller. Control the release of water to allow more open time, help fill up and form a good plastic mucosa, without significant increase in drying time.
HEC XT-4 concentration in solution 0.2% to 0.5%, non-fabric adhesive can improve the mechanical strength in the wet roller to reduce wet clean cotton, an increase of the final product of the wet strength.
HEC XT-40 for non-fabric dyeing is an ideal adhesive, and can get clear, beautiful images.
HEC can be used as adhesives and acrylic paint fabric processing of non-adhesive. Also used fabric paint and adhesive thickener bottom. It does not react with the filler and is still valid at low concentrations.
● carpet dyeing and printing fabric
Carpet dyeing, continuous dyeing systems such as Marcus Tesi, few can match other HEC thickener thickening effect and compatibility. Because of its thickening effect, soluble in various solvents, low impurity content does not interfere with the absorption of dye and color spread, so that printing from the insoluble gel (insoluble gel that can lead to spots on the fabric) and high-tech requirements of uniformity limit.
● Other applications
Fire -
HEC can be used as additives increase the fire protection material covering the performance has been widely used in fire "thickening" of the preparation.
Casting -
HEC to improve the system of cement sand and sodium silicate sand wet strength and shrinkage.
Microscopy -
HEC can be used for film production, as a dispersant for the production of microscopic slides.
Photography -
In dealing with the high salt concentration of the fluid film in as thickener.
Fluorescent tube coating -
Fluorescent tubes in fluorescent paint for the adhesive agent, stable dispersions can be applied uniformly control ratio. Select a different level and can control the concentration of HEC and wet adhesion strength.
Electroplating and electrolysis -
HEC gel to protect against impact the level of electrolyte concentration; in cadmium plating solution hydroxyethyl cellulose can promote uniform deposition.
Ceramics -
Can be used for the preparation of high-strength ceramic adhesive.
Cable -
Waterproofing agent prevents water into the damaged cable lines.
Toothpaste -
Used as a thickener in the manufacture of toothpaste.
Liquid detergent -
Mainly used in detergents rheology adjustment.
Hydroxyethyl cellulose(HEC) salt experiment report
First, the experimental apparatus and drugs
1, apparatus: ZNN-D6 viscometer type six-speed rotating glass (500ml) electric mixer (60W)
2 drugs: HEC (XT-20, 30000 cps) NaCL (Industrial)
Second, the purpose of the experiment
By measuring the HEC in freshwater and salt water (3%), the apparent viscosity of the solution, the salt resistance of HEC.
Third, the experiment content
1, the preparation of 3% NaCL solution 500ml spare;
    2, a, prepared with distilled water of 0.5% HEC solution, open the electric mixer for mixing, stirring until fully apparent viscosity of a uniform and transparent colloid solution, covered with glass, room temperature for 6 hours, heat to 25 ℃, with a
ZNN-D6 viscometer and its viscosity;
       b, with more than 3% NaCL solution prepared by the above method a 0.5% HEC solution, and determine its viscosity. 

 

 Reading speed
Concentration
Φ100
Φ200
Φ300
Φ600
AV
0.5%  Freshwater
12
20
26
40
20
0.5%  Saline
14
22
28
43
21.5

 

    3、a、 With distilled water 0.1% HEC solution, open the electric mixer for mixing, stirring until fully apparent viscosity when a uniform and transparent solution, covered with glass, put it aside for 6 hours, heat to 25 ℃, with a ZNN-D6 viscosity meter measured the viscosity;
    b、With more than 3% NaCL solution prepared by the above method a 0.1% HEC solution, and determine its viscosity.

 

Reading speed
Concentration
Φ100
Φ200
Φ300
Φ600
AV
0.1%  Freshwater
1
1.9
2.5
4.5
2.25
0.1%  Saline
1
1.9
2.5
5
2.5

 

CONCLUSIONS
    Through the above experimental data, indicating that the high viscosity HEC in 3% salt solution with good salt tolerance.
HEC Physical and Chemical Indicators
White powder, relative density of 0.55-0.75; softening temperature of 135-140 ℃; color temperature of 205-210 ℃. Products because of their molecules contain hydrophilic hydroxyethyl (-CH2CH2OH), it is soluble in cold water and hot water solution PH value 5.5-7; HEC slightly soluble in ethylene glycol under heating (≤ 1%), propylene glycol, glycerin and a few other organic solvents, insoluble in most organic solvents. HEC solution PH value between 2-12, the viscosity quite stable over this range will be acid hydrolysis or alkaline oxidative degradation of the viscosity; HEC solution viscosity decreases with increasing temperature, if the temperature is reduced to the original temperature viscosity recoverable. In the absence of the presence of high concentrations of salt, the solution heated to boiling and no gel precipitation, so HEC is very stable temperature. HEC solution is non-ionic system, with many other water-soluble polymers, surfactants, salts, etc. co-exist. HEC has a thickening, suspending, adhesive, emulsion, film stability, dispersion, water retention, anti-microbial properties and colloid and other protection, can be widely used in various industries. 
                                            Technical   Date   Sheet(TDS)
 
Project
Index
Exterior
White or light yellow solid
Water
≤ 6.0 %
Molar degree of substitution(MS)
1.4 - 2.4
Thermal stability
 
Softening temperature ℃
135 - 140
Decomposition temperature ℃
205 - 210
Specific Gravity (film 20℃/20℃)
1.38 - 1.40
2% Solution
 
PH
5.5--7
Surface tension N/M
0.06--0.065
Note:
This product is easy to absorb moisture, dry conditions need to be transported and stored.

 
HEC laboratory test report
First, the sample delivery unit and the manufacturer: Hubei Xiangtai Cellulose Co., Ltd.
      Second, the product name and code: (viscous type 35000 mPa.s) hydroxyethyl cellulose
Third, pilot projects and test results
  1, water-soluble test:
 

 

Project
Test results
Remarks
Water insoluble %
0
Its good water solubility, the preparation process without the phenomenon of agglomeration, 2% aqueous solution transparent.

 

  2、Mud ratio test:

 

Project
Test results
Remarks
Rate of mud
m3/T
4% Saline
237.5
HV-CMCIndicators≥150 m3/T
Saturated brine
241.6
HV-CMCIndicators≥160 m3/T

 

  3、Anti-calcium test:

 

CaCl2Dosage%
1   2    5    10  15
Remarks
AV
mPa.s
21  20.5  21  22  23
HECDosage0.5%

 

  4、Shear stability test:

 

Shear timemin
1    2    5    10    20
Remarks
AV
mPa.s
18  17.5  17.5  17  16.5
Dosage 0.5%
Shear rate 11000rpm

 

5、Temperature Stability Test:
1)High temperature stability:

 

Rolling time,h
16h    24h    48h
Remarks
AV
mPa.s
16.5    16    16
Rolling temperature 100℃

 

2)The impact of temperature on the viscosity:

 

Temperature℃
    40     50     60     80    90 
AV
mPa.s
18    17.7    17.2    17    16.3

 

6、Acid-soluble test:

 

Project
Test results
Remarks
Acid insoluble
0
Use 15%HCl

 

7、Core damage penetration test:

 

Treatment agent
Restore the original permeability value,%
HEC(Acid gel breaking)
93.2
HEC(Acid gel breaking)
99.5

 


 CONCLUSIONS:
  1, the sample solubility, the aqueous solution preparation of convenient, fast;
  2, the mud sample rate, and the calcium salt resistant ability, can be used for freshwater, salt water drilling fluids;
 3, the high temperature stability is good, can be used in deep well temperature within 120 ℃;
  4, the sample can be completely dissolved in acid, the value of core permeability recovery more than 90% can be used for the preparation of oil and gas reservoir drilling fluids, completion fluids, workover fluids and fracturing fluids, etc., will help protect the oil and gas reservoir layer, to improve oil recovery.
                                Institute of the Ministry of Petroleum and Mineral Mud Room
Typical properties of HEC solution
Refractive index (2% solution, 20 ℃) ​​1.336
PH 5.5 - 7
Freezing Point (℃) 0
Color (platinum - cobalt color) 40
25 ℃, 1% aqueous solution
Surface Tension N / W 0.06 - 0.065
Apparent viscosity (AV, cps) 122
Note: Apparent viscosity (AV) with XT-40, 40000cp dubbed the 1.2% HEC solution at 25 ℃ with Fan viscometer, AV value of the instrument readings at 600rpm for 1 / 2.
HEC solution viscosity range
 

Model
Index Name

 
 
 
XT-04
XT-02
XT-01
XT-1
XT-2
XT-4
XT-6

Water

 
, %
 
≤6
≤6
≤6
≤6
≤6
≤6
≤6

1) Ash

 
, %
 
≤8
≤8
≤8
≤8
≤8
≤8
≤8
2) Viscosit,mPa.S
0—200
50—100
100—200
200—300
300—500
500—1200
1200—3000
Molar degree of substitutionMS
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
PH value
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
 

Model Ash
 

 
Index Name
 
XT-8
XT-10
XT-15
XT-20
XT-40
XT-50
XT-60
XT-80

Water

 
, %
 
≤6
≤6
≤6
≤6
≤6
≤6
≤6
≤6
1), %
≤8
≤8
≤8
≤8
≤8
≤8
≤8
≤8

2) Viscosity

 
,mPa.S
 
3000—8000
8000—12000
12000—20000
20000—30000
30000—50000
50000—80000
4000—6000
≥6000
Molar degree of substitutionMS
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
1.4-2.4
PH value
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
5.5-7.0
1)For the textile, paint ≤ 12%; for Polymer Synthesis, construction, oil ≤ 18%, other industries adjusted according to customer requirements.
2)Viscosity is 25 ℃, with Brookfield LVDV-I-type viscometer, XT-04 is a 5% aqueous solution, XT-60, XT-80 is a 1% aqueous solution, the other 2% aqueous solution.
Key performance characteristics of HEC
Thickening
Hydroxyethyl cellulose (HEC) is the ideal thickener paint and cosmetics. Practical applications, the thickening and suspension, safety, dispersion, water retention combined application will produce even better results.
Pseudoplastic
Pseudoplastic viscosity that increases with the speed and reduce the nature. The paint containing HEC easily with a brush or roller construction and increase the surface smoothness, so you can increase the work efficiency; with HEC's shampoo is good and very viscous liquid, easily diluted, easy to disperse.

Salt tolerance
HEC in high concentration salt solution is very stable, will not break down into plasma state. Used in electroplating, the plating makes the surface more complete light. It is worth noting that applied boron salts, silicates and carbonates in the paint, still has a good viscosity.

Film-forming
HEC film forming can be applied in many industries. In the papermaking operation, HEC coated with the polish to prevent the penetration of grease, and other aspects of the paper used for the preparation of the solution; in the textile process, HEC can increase the flexibility of reducing the fiber causing mechanical damage. Sizing and fabric dyeing and finishing process, HEC can play the role of temporary protective film, if not its protection, the available water will wash away from the fibers.

Water retention
HEC is conducive to maintaining the water system in an ideal state. Because the HEC aqueous solution containing a small amount of water can be a very good effect, making the system when the ingredients reduced the demand for water. If there is no water retention and adhesion of cement mortar will reduce its strength and bond strength, clay in a certain pressure will be reduced plasticity.
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