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Trigonox® K-80
Product description Cumyl hydroperoxide, 80% in aromatic solvent mixture
CAS No. : 80-15-9
EINECS/ELINCS No. : 201-254-7
TSCA status : listed on inventory
Specifications Appearance : Clear liquid
Assay : 80.0-85.0%
Color : 450 Pt-Co max.
Active oxygen : 8.40-8.94%
Characteristics Density, 20°C : 1.06 g/cm3
Viscosity, 20°C : 10.4 mPa.s
Storage Due to the relatively unstable nature of organic peroxides a loss of quality can be detected over a period of time. To minimize the loss of quality, AkzoNobel recommends a maximum storage temperature (Ts max.) for each organic peroxide product.
For Trigonox K-80 Ts max. = 40°C and
Ts min. = -30°C to prevent crystallization
When stored under these recommended storage conditions, Trigonox K- 80 will remain within the AkzoNobel specifications for a period of at least 6 months after delivery.
Thermal stability
Organic peroxides are thermally unstable substances, which may undergo self-accelerating decomposition. The lowest temperature at which self-accelerating decomposition of a substance in the original packaging may occur is the Self-Accelerating Decomposition Temperature (SADT). The SADT is determined on the basis of the Heat Accumulation Storage Test.
For Trigonox K-80 SADT : 75°C
The Heat Accumulation Storage Test is a recognized test method for the determination of the SADT of organic peroxides(see Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria-United Nations, New York and Geneva).
Acetophenone, 2-Phenylisopropanol, Methane
Trigonox K-80 is packed in a 30 liter HDPE can (Nourytainer®) for 25 kg peroxide and 200 kg steel drums of 180 kg net weight.
Both packaging and transport meet the international regulations. For the availability of other packed quantities contact your AkzoNobel representative.
Trigonox K-80 is classified as Organic peroxide type F; liquid, Division 5.2; UN 3109.
Safety and handling
Keep containers tightly closed. Store and handle Trigonox K-80 in a dry
well-ventilated place away from sources of heat or ignition and direct
sunlight. Never weigh out in the storage room.
Avoid contact with reducing agents (e.g. amines), acids, alkalis and heavy metal
compounds (e.g. accelerators, driers and metal soaps).
Please refer to the Safety Data Sheet (SDS) for further information on the safe
storage, use and handling of Trigonox K-80. This information should be thoroughly
reviewed prior to acceptance of this product.
The SDS is available at www.akzonobel.com/polymer.
Applications Trigonox K-80 can be used for various polymerization reactions; for the
copolymerization of styrene and butadiene for the polymerization of
acrylonitrile, acrylic esters, vinyl chloride, styrene, vinyl toluene, isoprene, diallyl phthalate and unsaturated polyesters.
In this bulletin we restrict ourselves to the application of Trigonox K-80 as curing agent for unsaturated polyester resins.
Without the addition of an accelerator the polymerization starts only above the activation temperature of 90°C. For the cure at lower temperature Trigonox K-80 must be accelerated by cobalt or vanadium. Together with cobalt accelerators the gel time atroom temperature is very long and is therefore particularly suitable for those applications where a long production time is required, for instance in the production of large parts and in filament winding. Sufficiently fast gel and cure times are only obtained above 35°C.
Together with vanadium accelerators Trigonox K-80 gives a short gel time and a fast cure at room temperature. This can be improved further by adding a special promotor, like pyruvic acid. With such a system it is possible to get a fast cure of UP resins, even at low temperature. Also for resins like vinylester resin, these combinations are very suitable.
Dosage Depending on working conditions, the following peroxide and accelerator dosage levels are recommended:
Trigonox K-80 1 - 3 phr *
Accelerator VN-2 0.5 - 3 phr
Accelerator NL-51P 0.1 - 0.5 phr
Cure Characteristics in pure UP resin
1 phr Trigonox K-80 90°C
1.5 phr Trigonox K-80 + 0.5 phr Acc. NL-51P 1380 min.
The following table indicates the performance of Trigonox K-80, in comparison with usual Butanox® systems, in a vinylester resin:
The fact that processing times of several hours can be achieved with low cobalt dosages makes Trigonox K-80 very suitable for use in e.g. filament winding techniques. Simulating the manufacture of a pipe at 50°C consisting of a laminate of 10 mm with a glass content of 30% and an epoxy vinylester resin gave the following results:
Trigonox K-80 2 phr
Accelerator NL-49P 0.25 phr
Gel time at 20°C 330 minutes
Curing data at 50°C |
| |
Gel time | 62 | minutes |
Time to Peak | 118 | minutes |
Peak exotherm | 117 | °C |
Barcol hardness (934-1) 10 minutes after reaching the peak: 50