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ZELEC® UN

ZELEC® UN is a powerful agent that combines antistatic properties with mold release capabilities. Its use spans metalworking, textile applications, and pultrusion molding. In metalworking, it aids in polyester resin molding operations involving external heat, like matched metal die, compression, and pultrusion processes.

Brand: ZELEC (18 products)

Functions: Anti-Static Agent, Release Agent

Chemical Family: Organophosphates, Phosphate Esters, Phosphorous-based Compounds

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Benefits/Advantages
  • Eliminate labor costs involved with external release agents.
  • Cleanliness of molds.
  • Reduced release agent cost on utility basis when compared with other more conventional internal mold release agents.
  • Protects ferrous metal molds from corrosion during storage.
  • Reduced danger of loss or damage to expensive molds or parts due to improper application of external parting agents.
  • Improves surface appearance of molded parts.
  • Elimination of some adhesion problems during applications of finishes, printing inks, or adhesives to the molded part.
  • Produces exceptionally smooth surfaces on molded products made from low shrink, unsaturated, thermosetting polyester resins.
  • No adverse affects on the rate and cure of polyester resins.

Applications & Uses

Markets
Applications
Fluids & Lubricants Type
Industrial Additives End Use
Applications

ZELEC UN is an effective release agent in polyester resin molding operations that require external heat, such as matched metal die, compression and pultrusion. In applications and filler systems where the acidity of ZELEC UN may be an issue, the use of the low acid version, ZELEC MR-2, is recommended.

End Product Uses

  • Internal release agents for molding of unsaturated polyester resins.
  • Release agent for externally heat cured molding operations.
  • Internal mold release agent for pultrusion molding of fiberglass reinforced polyester resins
Usage Rates

For internal release in polyester resins, 0.5 parts ZELEC UN per 100 parts resin are recommended for initial trials. Lower or higher rates may be required depending on the resin characteristics. Typical ranges fall between 0.25 and 0.75 parts per 100. Conditioning of the mold may be required with certain resins where either higher usage rates or external application of a 5% solution of ZELEC UN may be required for several runs prior to starting the molding run.

Properties

Physical Form
Appearance
Clear pale yellow liquid
Soluble in
Styrene, Active Solution
Dispersible in
Isopropanol, Mineral Oil
Insoluble in
Toluene
Typical Properties
ValueUnitsTest Method / Conditions
Decomposition Temperaturemin. 175°C-
Density (at 25 °C)0.98g/ml-
Actives Content100%-
Flash Pointmin. 94°C-
Viscosity (at 27°C, 80 °F)165cPs-

Regulatory & Compliance

Chemical Inventories
Clearances

The international inventories (country clearances) of ZELE UN can be found in Section 15 of the Safety Data Sheet (SDS). It is the responsibility of the formulator to review the chemical control regulations for each country where the end product is intended to be sold or used.

Technical Details & Test Data

Effect of ZELEC UN on Hardness of Oven Cured Polyester
% ZELEC
  0 0.1 0.25 0.5 2
ZELEC UN 86 86 88 88 85
  • Hardness - Barcol 935 Hardness
  • Polyester - Plaskon 941 + 1.0% Benzoyl Peroxide
SPI Gel Time

Exotherm Curves for Polyester Resins Containing ZELEC UN

  % Conc. Gel Time Cure Time Peak Exotherm

ZELEC UN

0.25 6 min, 0 sec 7 min, 30 sec 202°C (395°F)
0.5 6 min, 0 sec 7 min, 45 sec 208°C (407°F)
Control 0 5 min, 30 sec 7 min, 30 sec 221°C (430°F)

Polyester - Plaskon 941 + 1.0% Benzoyl Peroxide.

Safety & Health

Health Effects

ZELEC UN is slightly non-toxic orally (LD50, rat >5500 mg/kg) and may be corrosive to skin and eyes.

Packaging & Availability

Packaging Type
Standard Packaging

ZELEC UN is available in bulk and 55 gallon drums.

Storage & Handling

Storage & Handling

Normal safety precautions (i.e., gloves and safety goggles) should be employed when handling ZELEC UN. ZELEC UN is corrosive, contact with eyes and skin should be avoided. ZELEC UN should be stored in a cool, dry place in closed containers.

Workplace Exposure

Occupational exposure can occur primarily through skin contact or via inhalation of vapors and mists. Engineering controls, personal protective equipment, and other workplace practices should be used to control these exposures.