International name: Plasticizer EDOS

Synonyms: Flotoreagent Oksal T-92

Chemical composition: 4-methyl-4-hydroxyethyl-1,3-dioxane -1-3%

Appearance: low volatile light liquid with a specific odor

Manufacturing: Russia

Packing and storage: metal barrel; 1 year

 

Plasticizers. General information

Plasticizers are substances that are introduced into the composition of polymer materials to impart (or enhance) elasticity and (or) plasticity during processing and operation. The plasticizers facilitate dispersion of the ingredients, lower the processing temperature of the compositions, improve the frost resistance of polymers, but sometimes impair their heat resistance. Some plasticizers can increase the fire, light and heat resistance of polymers.
General requirements for plasticizers: good compatibility with the polymer, low volatility, no odor, chemical inertness, resistance to extraction from the polymer by liquid media, for example, oils, detergents.
The most common plasticizers are esters, for example dioctyl phthalate, dimethyl phthalate, dibutyl phthalate, dibutyl sebacate, dioctyl adipate, dioctyl sebacate, diisobutyl phthalate, tri (2-ethylhexyl) phosphate, phthalic and trimellitic acid esters, orthophosphoric acid esters. Mineral and non-drying vegetable oils, epoxidized soybean oil, chlorinated paraffins, etc. are also used.
The amount of plasticizer in the composition is from 1 ... 2 to 100% (by weight of the polymer).
The main consumer of plasticizers is the plastics industry (about 70% of the total production of plasticizers is spent on the manufacture of plastic). Plasticizers are widely used in the production of nail varnishes.
Plasticizers are also surface-active additives, which are introduced into mortars and concrete mixtures (0.15 ... 0.3% by weight of binder) to facilitate laying in the mold and reducing the water content. This improves most of the characteristics of the solidified mixture, and also reduces cement consumption, reduces energy consumption when vibrating concrete (self-compacting mixtures) or leveling screeds (self-leveling self-leveling floor mixes).
A widely used plasticizer of this type is the sulphite-alcohol bard. Later, super- and hyperplasticizers with smaller dosages, as well as antifreeze, air-entraining and other useful properties were created.

 

Description

EDOS is a plasticizer with a wide range of applications. It is a mixture of polyfunctional compounds: hydroxyl and ether groups, oxygen-containing rings. EDO in large quantities is used for partial or complete replacement of dibutyl phthalate (DBP), dioctyl phthalate (DOP), and other ester plasticizers.

It is a promising plasticizer of a wide class of polar polymers with complex bonds and can also be of interest for polymers containing ether groups, for example, ethers, epoxy resins, etc.

It is not an exfoliating clear liquid, the color varies from dark brown to yellow. EDOC is a mixture of esters and formulations, it is an effective plasticizer of such polymers as: polyvinyl acetate (PVA), styrene- and methyl methacrylate-containing polyester resins, di- and triacetates of cellulose.

The increased rigidity of some polar polymers makes it necessary to use plasticizing additives. The role of plasticizers is to weaken intramolecular and intermolecular polar bonds. In this capacity, EDO is particularly effective, due to the presence of 1,3-dioxin cycles in its composition, which increase the flexibility of molecular chains of polymers to a greater extent than linear ester plasticizers, such as traditional phthalic acid esters.

 

Properties

        EDS has the following properties:

the ability to lower the surface or interfacial tension, due to the adsorption and orientation of molecules at the interface;

low concentration of a molecularly dissolved substance;

the presence of a critical concentration of micelle formation, above which in its solutions a new phase is released and aggregates of the micelle molecules are formed;

the ability of micelles to dissolve water-insoluble substances, which is known as solubilization or colloidal dissolution;

sufficiently high limit adsorption;

the diffusion of molecules consisting of hydrophilic and hydrophobic parts;

the ability to adsorb on the surface of latex particles, increasing their aggregative stability.

 

Application

Plasticizer EDOS is a substance introduced into the composition of polymer materials to give (increase) elasticity during processing and operation.

It is widely used in the production of rubber compounds on the basis of rubbers (pressure-suction antistatic hoses, sealing gaskets, hoses, shock absorbers, stuffing boxes and other rubber products), polyester and epoxy compositions (paint and varnish materials, floor coatings for sports facilities and production premises, bonding composite materials) .

EDC is used for the plasticization of vinyl resins and other polymers, we also use in the production of cable plastic compounds, artificial leather, rubber products, polymer building materials, linoleums, film materials, packaging films, PVC products for household appliances.

 

Safety requirements

In terms of the degree of exposure to the human body in accordance with the requirements of GOST 12.1.007-76, the plasticizer EDOS belongs to the 2nd hazard class - a low hazard substance (the flotation agent oxal in the main component), the maximum permissible concentration in the air of production premises is not established due to low volatility of the vapor constituents. General sanitary and hygienic requirements for the air of the working area comply with the requirements of GOST 12.1.005-88.

The control over the state of the air environment is carried out in accordance with the requirements of GOST 12.1.014-84 SSBT. Air working area. Method for measuring concentrations of harmful substances in indicator tubes. The cumulative properties of the plasticizer of EDOS in view of the average toxicity are not defined. Plasticizers are a fire hazardous liquid.

 

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