CAS Number: 68953-58-2
EINECS: 273-219-4
VISCOGEL B4 is a bentonite clay organically modified with a quaternary alkyl ammonium compound.
VISCOGEL B4 acts as a rheology modifier for solvent-borne systems.
VISCOGEL B4 requires mechanical energy, shear forces applied with a good dispersion equipment, and a chemical (polar) activator to reach the proper level of delamination of the organobentonite platelet stacks.
VISCOGEL B4 offers sag control and excellent levelling.
VISCOGEL B4 shows good performance in solvents like aliphatic mineral spirits and aromatics.
VISCOGEL B4 is used in manufacturing oil based paints and stains for industrial or architectural industry.
VISCOGEL B4 is recommended for house & industrial paints (at dosage level 0.2% - 0.6%), primers & printing inks (at dosage level 0.5% - 1.0%), and for applications with strong anti-sagging properties (at dosage level up to 3.0%).
The shelf life of VISCOGEL B4 is 36 months.
VISCOGEL B4 is a rheological additive for solvent-borne systems of low to medium polarity that gives thixotropic effect, sag control, excellent levelling and prevents pigments from long-term storage settling.
The nature of VISCOGEL B4 is a bentonite clay, organically modified with a quaternary alkylammonium compound.
Description of VISCOGEL B4:
VISCOGEL B4 is a rheological additive for solvent-borne systems of low to medium polarity that gives thixotropic effect, sag control, excellent levelling and prevents pigments from long-term storage settling.
The nature of VISCOGEL B4 is a bentonite clay, organically modified with a quaternary alkylammonium compound.
CHEMICAL AND PHYSICAL DATA OF VISCOGEL B4:
COMPOSITION: Smectite clay with alkilammonium salt
COLOUR: Pale cream
FORM: Free flowing powder
DENSITY: 1.7 g/cm3
MOISTURE: 3 %
VISCOGEL B4 acts as a rheology modifier for solvent-borne systems.
KEYWORDS:
68953-58-2, 273-219-4, VISCOGEL ED, VISCOGEL ED2, VISCOGEL S7, VISCOGEL S8, VISCOGEL X4, VISCOGEL X7, VISCOGEL XD, VISCOGEL XD2
Applications of VISCOGEL B4:
VISCOGEL B4 is used in a wide range of manufacturing processes like oil based paints and stains (either industrial or architectural), printing inks, lubricating greases, adhesives, cosmetic and personal care products, to give the desired rheological control to the system.
VISCOGEL B4 shows particularly good performance in solvents like aliphatic mineral spirits and aromatics.
Advantages of VISCOGEL B4:
-VISCOGEL B4 has high efficiency
-The gel is of light colour and high clarity
-VISCOGEL B4 is easy to use, no need to pregel
-VISCOGEL B4 eliminate polar activator
-VISCOGEL B4 consistent development of rheology
-VISCOGEL B4 can be used to post correct
Applications of VISCOGEL B4:
-Paint
-Sealants and adhesive
-Ink
-Cosmetic
-Nano-composite
Uses of VISCOGEL B4:
VISCOGEL B4 can be added directly in powder without polar activator and making pre-gel.
But better performance may achieved if polar activator is added and pre-gel procedure is effected.
Incorporation of VISCOGEL B4:
VISCOGEL B4 belongs to the conventional type of organoclays group, which requires mechanical energy, shear forces applied with a good dispersion equipment, and a chemical (polar) activator to reach the proper level of delamination of the organobentonite platelet stacks.
While heat is not essential in most cases, processing temperatures above 20°C are preferred.
Activators’ dosage (based on VISCOGEL weight:
METHANOL/H2O (95:5): 33%
ETHANOL/H2O (95:5): 50%
ACETONE/H2O (95:5): 60%
PROPYLENE CARBONATE/H2O (95:5): 33%
PROPYLENE CARBONATE: 33%
VISCOGEL B4 is always recommended to determine the proper level of addition by experiment.
Either defect or excess of chemical activator would result in poorer viscosity development.
Usage: Laboratory
Grade Standard: Technical Grade
Physical State: Liquid
Packaging Type: Glass Bottle
Several methods can be used to incorporate VISCOGEL B4:
1. The “direct add” technique.
VISCOGEL B4 is added directly in powder form to the solvent/resin mix, before pigment addition and milling.
Surfactants have to be added the last.
2. The “pregel” technique.
VISCOGEL B4 is pregelled as described above in a suitable solvent at a 5-10 % concentration, with a polar activator.
The activated gel is then added to the binder solution and stirred.
After pigment addition the mix is finally milled.
Dosage of VISCOGEL B4:
Level of addition strongly depends on the type of system and on the degree of thickening or other properties desired.
For house and industrial paints, typical levels are between 0.2 % and 0.6 % of VISCOGEL B4.
For primers and printing inks, higher levels are required (0.5-1.0 %).
For strong antisagging properties, up to 3.0 % can be used.
Storage Stability And Packing of VISCOGEL B4:
Product do not deteriorate in a significant way in a 36 months period.
Storage is advisable in a dry, sheltered place in closed bags.
Packing is 25 Kg net paper bags on wood pallets of 1000 - 1,400 Kg each.
Additive rheological VISCOGEL B4 specially designed for systems based on organic solvent polarity from low to medium.
In a typical coating systems (coatings and printing inks) additive VISCOGEL B4 provides a thixotropic effect, SAG control, good leveling, and also prevents the settling of pigments during long-term storage.
By their nature, additive rheological VISCOGEL B4 is bentonite clay, organically modified Quaternary ammonium base is essential for development of organophilicity with the aim of increasing efficiency in organic medium.
Chemical and physical properties of VISCOGEL B4:
The composition of the smectite clay with a Quaternary ammonium base
Color: pale cream
Form: freely current powder
Density: 1.7 — 1.8 g/см33
Moisture: 3% max
Applications of VISCOGEL B4:
Additive rheological VISCOGEL B4 is widely used in production processes with the aim of providing rheological control of the system, namely, decorative paints and paints for industrial use, primers, bottom layers, printing ink (lithography, letterpress, gravure printing), grease, bitumen compounds, adhesives, mastics, sealers and waxes.
Thanks to its stability from the point of view of expansion when working in the solvent polarity from low to medium additive VISCOGEL B4 has proven itself in such solvents as mineral spirits aliphatic and aromatic series.
Binders with low polarity, such as Alcide and terpenes, a substance based on petroleum products and styrene-butadiene rubber, are also compatible with VISCOGEL B4.
VISCOGEL B4 is always necessary to determine the correct level of additives based on the experiment.
Defective chemical activator or its excess reduce development viscosity.
In the market there are other types of chemical dispersing agents based on surfactants, which act as dispersing agents on top of plastinates supplements VISCOGEL B4, and should be used only after it has occurred dispersing organogeny.
To enter supplements VISCOGEL B4 can be used the following methods:
1.Input method supplements "on the spot".
Supplement VISCOGEL B4 is entered directly in powder form to the mixture of solvent and resin prior to adding pigment and grinding.
VISCOGEL B4 is desirable to moisten organogeny and disperse, and then add the polar activator or to the input of the pigment, or after.
Last added surfactant.
2.Method with the use of "Pregel".
Additive pre-turns into a gel as outlined above, at a concentration equal from 5 to 10%, in an appropriate solvent and in the presence of the polar activator.
Then the activated gel is added to a binder solution and mixed.
And after adding the pigment mixture, finally, crushed.
A higher concentration of the activated gel (15-20%) can be obtained by using the appropriate dispersion additives that are always added after the complete dispersion of organogeny.
Dosage of VISCOGEL B4:
The amount of additive is strongly dependent on the type of system and the degree of thickening or other properties required.
For paints used in household purposes, and dyes for industrial use usual levels range from 0.2% to 0.6% of dry powder VISCOGEL B4, which is sufficient to impart desired properties to the paint, in particular protivolodochnyi.
For coatings and printing inks require higher levels of additives (from 5.1% to 1%).
Eliminating stains can be used to 0.3% powder VISCOGEL B4.
Stability during storage of VISCOGEL B4:
During 12 months of storage of the product, its quality and properties are not appreciably reduced.
The product is best stored dry and indoors in sealed bags.
Packaging of VISCOGEL B4:
Paper bags weighing 25 kg on wooden pallets weighing 1200 kg each.
Product Range:
VISCOGEL B4
VISCOGEL ED
VISCOGEL ED2
VISCOGEL S7
VISCOGEL S8
VISCOGEL X4
VISCOGEL X7
VISCOGEL XD
VISCOGEL XD2
VISCOGEL XDS