Polymer Compounds

Polymer Compounds


poured insulation compositions based on thermosetting oligomers or monomers. They are used to impregnate (for insulation) transformer windings, reactors of electrical machines, and articles of radio-engineering and electronic apparatus, as well as for filling the gaps (potting) between parts of electrical machinery or apparatus. The main advantage of poured insulation is the possibility of producing electrical-engineering articles in the form of small units of any configuration that do not require additional finishing. Polymer compounds also include some less frequently used compounds based on thermoplastics (such as bitumen, oils, rosin, and ceresin); these compounds have a hard or waxy consistency and are liquefied before use by heating.

The materials usually used as oligomers in preparing polymer compounds are epoxy resins, polyester resins, and liquid organosilicon rubbers; the raw materials for the synthesis of polyacrylates and polyurethanes are used as monomers. Epoxy polymer compounds are the most widely used materials. The composition of polymer compounds includes not only monomers and oligomers but also plasticizers, fillers, cure accelerators or polymerization initiators, and pigments.

The requirements for uncured polymer compounds are absence of volatile components, minimum shrinkage upon hardening or polymerization, low viscosity (which ensures good impregnation and potting properties), and sufficient resistance to aging. Cured polymer compounds must have good dielectric properties (see Table 1) and high strength. The hardening of polymer compounds occurs at room temperature or higher.

Table 1. Dielectric properties of Soviet cured compounds at 20°C
Name and brandTangent of dielectric phase angle1Specific electric resistance (ohms-cm)Electric strength at 50 Hz (kV/mm)Dielectric constant1
1Frequency (in hertz) is shown in parentheses
Epoxy and epoxy-polyester    
D-1120.01 (103)1014533.5(103)
EZK-90.009 (106)10154.3 (106)
D-80.03 (105)10144.5 (106)
EPK-1010.015 (50)9.9 X 1014224.8 (50)
KGMS-1 polyester0.04 (50)5 X 1013254.0 (50)
MBK-1 methacrylic0.07 (50)1014204.0 (50)
K-31 Polyurethane0.02 (106)1014273.5 (196)
K-67 organosilicon0.005 (50)1015203.0 (50)


Cherniak, K. I. Epoksidnye kompaundy i ikh primenenie, 3rd ed. Leningrad, 1967.
Cherniak, K. I. Nemetallicheskie materialy v sudovoielektro-iradioteknicheskoi apparature: Spravochnik. Leningrad, 1966.
Volk, M., J. Lefforge, and P. Stetson. Germetizatsiia elektrotekhnicheskoi i radioelektronnoi apparatury. Moscow-Leningrad, 1966. (Translated from English.)


References in periodicals archive ?
Aurora and S&E share a common focus on being our customers' first choice in polymer compounds.
Hexpol has strong global positions in advanced polymer compounds (Compounding), gaskets for plate heat exchangers (Gaskets), and plastic and rubber materials for truck and castor wheel applications (Wheels).
In India, Sumitomo Chemical had set up Sumika Polymer Compounds
Hexpol has global positions in advanced polymer compounds (compounding), gaskets for plate heat exchangers (gaskets), and plastic and rubber materials for truck and castor wheel applications (wheels).
A growing demand for technically sound recycled polymer compounds is driving demand for Axion Polymers.
For analysis of polymer compounds, a pyrolyzer is used to vaporize the sample.
The other chapters are titled as follows: properties, synthesis and application of polyacetylene; trends in activated carbon fibers; polymer nanocomposites; the effects of modified silica-gelatin hybrid systems on the properties of paper products; computational techniques in nanosystems; calculating internal structure and equilibrium configuration of nanoparticles; and trends in ozonation of polymer compounds.
The Hebron, Ohio, plant houses $11 million worth of fully automated technology for producing natural-fiber polymer compounds in HDPE, PVC, PP, and others.
The release highlights a major addition to the Analyzelt spectral interpretation applications for IR, Raman, and IR Polymer compounds.
This work reviews the latest understanding of the kinetics and mechanisms of ozone reactions with organic and polymer compounds.
Regalite resins have been produced since 1985 and are used extensively in a variety of hot melt adhesives, polymer compounds and plastic modifications.
C[yen] DSM said that it worked closely with Austrian-based Advanced Polymer Compounds (APC) a company specialised among other things in formulating and testing recipes in compounding processes, and succeeded in meeting the technological challenge of developing a product that does not self-ignite, drip or delaminate at temperatures of up to 250[euro]centsC.