The chemical company BARZAGHI, who has more than 75 years of experience,
produces by chemical synthesis a wide range of Carboxymethylcellulose present in the
market with trademarks Carbofix® and Gelogum®.
Manufacturing capacity is at present
of about 4,000 metric tons per annum, focussed exclusively on special types according to
particularly demanding technical specifications. Carboxymethylcellulose, commonly known as
CMC, is a special organic polymer soluble in aqueous systems.
Sodium Salt of Carboxymethylcellulose
Click to view CMC rotation
CMC is produced by reacting together
in adequate conditions cellulose, caustic soda and mono-chloroacetic acid, according to
the following scheme:
The above is a simplified formula
since in reality molecules are particularly long and the carboxymethyl groupings (-CH2COONa)
could be linked with any of the hydroxyl groups present in the glucose units, as
exemplified in the molecular formula shown above.
The numerous applications of
Carboxymethylcellulose arise from its hydrophilic properties, the high viscosity of its
diluted solutions, its property of forming films resistant to fats, its non-toxicity as
well as from its particularly good behaviour as a stabilizing and adhesive colloid.
In particular, Carboxymethylcellulose
is being used:
In agriculture, as a thickener as well as a binder and suspending agent for anti-parasites
As a binder and stabilizer in temperas,
particularly in view of its high dispersing effect on pigments
As a binder for powder mixtures for pelletization such as, for instance, in the
production of animal feed and
fertilizers
As a printing thickener in the textile industry
In foundry moulds
In glazes for the ceramic industry
As an emulsifier in cements and bitumens
In the textile industry, as a component for
the formulation of yarn sizing
In the paper industry, as a co-binder of
coatings, in the surface treatment and as an additive in bulk paper-stock
In the fat-proofing of papers
As a stabilizer of detergents
and soaps
In the petroleum
industry, as an additive for drilling muds
Among CMC’s properties it is worth noting:
 Ease
of solution in cold and hot water
High adhesion and filming properties
Extended stability of its solutions
Non-surface active product
Non-foaming properties
Ecological product, completely biodegradable
Properties that classify the various
types of CMC and therefore their applications are expressed by:
The degree of substitution (i.e. solubility)
The degree of polymerization (i.e. viscosity)
Active substance (expressed as NaCMC)
pH of solutions
Particles’ size
In our brochures and product lists you will find CMC’s displaying high and low
viscosities, technical and purified, characterized according to their degree of purity, pH
of solutions, and degree of substitution.
Should you not find the product specific for your own requirements, please do
not hesitate to contact us. Our laboratory is at the disposal of our clients for whatever
custom-designed formulations.
Derivatives of Starches and Potato Flours |
An inspection of the chemical composition of cellulose and of similar glucose-based
polysaccharides, it reveals that the bonds between individual glucose units, known as the
glycosidic link (i.e. an oxygen bridge), display different positions according to the type
of the polysaccharide considered.
With regard to cellulose (Fig. 1), glucose units are linked according to a
rigid structural configuration, whereas this not true in other polysaccharides, such as
amylose (Fig. 2), where such a bond is particularly flexible.
Fig.1 - CELLULOSE
Fig.2 - AMYLOSE
It is therefore possible to use as
raw material affording water-soluble polymers, not only cellulose, but also starches,
potato flours, or a combination of different polysaccharides, such as vegetable gums, in
order to attain specific properties in the finished products. Based on such assumptions,
research work at Barzaghi has been able to design complex products at a competitive price.
When a suitable mixture of
polysaccharides is used as a raw material, esterification yields non-degradable products,
affording solutions displaying a good fluidity, having medium to low viscosities and an
excellent solubility both in hot and cold solutions as well as a stability of the solution
over long periods of time.
Our production of starches, today offered with the trademark Cartagel®, Resamin® and
Tabertex®, includes:
Cationic starches
Oxidized starches
Cationic-oxidized starches
Carboxymethylated
starches, with different degree of esterification,
in a liquid or in a powder form
CARTAGEL is a range of products specifically
designed for the paper industry, made by synthetic means starting from polysaccharides.
Their application includes:
Additives for bulk paper-stock. They improve the dry mechanical properties: i.e.
by improving resistance to burst, rip, pull, and superficial tear as well as by enhancing
the stiffness of the sheet;
Surface sizing. In applications such as size press they improve the printability
of paper;
Additives for coatings. They favour water retention and act as viscosity
regulators;
Co-binders for coatings and pre-coatings, affording a synergistic effect with
latexes.
The TABERTEX product line is obtained by synthetic
means starting from polysaccharides, chemically modified and properly formulated for the
textile industry, where they are used for the warp sizing of yarns.
RESAMIN L and L1 are
two anionic derivatives of polysaccharides obtained by synthetic means in water solutions,
specifically designed for the ceramic industry where they are used as binders for glazes.
The RESAMIN SA3 are derivatives of
oxidized-cationic polysaccharides obtained by synthetic means, specifically designed for
the paper industry, where they are used for the surface treatment of paper. In fact, when
used in size press they afford to the paper a glossy and closed surface, improving the
printability as well as the surface resistance properties.
Water-Soluble Complex Polymers |
Water soluble complex polymers belong to a family of products that, due to
their applications, cannot be made up by a single chemical component (such as e.g. CMC,
etherified starches, a vegetable gum or a resin), but different components are combined in
order to afford a synergistic effect, which in turn is necessary for satisfying the
requirements of a specific application, impossible to attain by other means.
The peculiar chemical properties of
each individual components have been designed in order to afford the best possible
combinations needed for yielding the desired results. By such means, complex although
particularly effective products are obtained such as, for instance, in warp sizing,
according to different types of yarns or in bulk paper-stock, for surface treatment, or in
coatings, where the base polymers often need to be supplemented with different products,
such as synthetic polymers, anti-foams, preservatives, retention-aids, vegetable gums,
etc.
It is obvious that the complexity of
products and the attainment of evermore complex properties by clients, has encouraged
Barzaghi to update its own expertise and technical knowledge of products and their
applications in order to offer to the market products aimed at satisfying the most
exacting and diverse requirements.
Selected Advantages of our
polymers
Cellulose and other naturally
occurring polymers that we produce are used in several applications and, in general,
whenever the following requirements are needed:
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To thicken an aqueous system
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Bind diverse blends of powders being used in extrusion or
synterization
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To enhance particular adhesion requirements in paper,
paper boards, and textiles
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To enhance the coating properties and plasticity of inert
charges, such as plasters, fillings, chalks, concretes and pigments in general
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To impart surface slippery properties
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To adsorb oils and fats
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To favour water retention and delay the drying process
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To favour the suspension of charges in water systems
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To stabilize emulsions
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To form fils with excellent plastic properties
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To form clear and stable gels
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Coconut Oil and Oleic Acid Soap |
Products from the Sapoil® line, represent a wide range of vegetable and
animal soaps.
The Sapoil products have a fluid and crystalline appearance and are particularly
concentrated in active ingredient and density. Furthermore, all the Sapoil products are
completely biodegradable, non-toxic and non-polluting.
The Sapoil product range includes products for industrial applications as well as
for formulations specifically designed for the personal hygiene; they are particularly
suitable for being used in dispensers.
Emulsionable Oils and Fats |
ECOLUBRE®: oils of vegetable
origine, completely biodegradable, self-emulsion making, displaying enhanced adhesion
properties to metal surfaces and a high lubricating properties.
LUBRETEX®: oils of synthetic
origine, self-emulsion making, formulated for spinning synthetic yarns with bulk stock and
texturized.
LYSGOMMA®: fat substances of natural
origine, available both cationic and anionic, self-emulsion making, particularly suitable
for the treatment of textile fibers.
Defoamers from the DEFOAMAR® series
include a wide range of silicon and non-silicon formulations. They are available as water
emulsions and they are specifically designed for the abatement and prevention of different
types of industrial foams.
SIL-DEFOAMAR® are products based on
liquid silicones and display enhanced anti-foam properties that make them suitable in
those applications with foams particularly difficult to abate or to prevent.
The ECO-DEFOAMAR defoamers are based on natural fatty substances and are
completely biodegradable, non toxic and non polluting products. These properties make them
particularly suitable in all those applications non compatible with the use of liquid
silicones.
OUR PRODUCTION
INCLUDES FORMULATIONS SPECIFICALLY MADE FOR THE SECTORS:
Paper
Textile
Detergents
Ceramics
Oilfields
Animal feeds
Bentonite
Glues and Adhesives
Gels and Thickeners
Cardboard
Paints
Pencils and chalks
Fire-resistant materials
Abrasives and grindstones
Electrodes for welding
Batteries
Anticrytogamics
Founderies
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