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PEROXAN PK295 P
Peroxyketale / Polymerization / Curing / Crosslinking
1,1-Di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane
40%,
Powder with chalk
PEROXAN PK295 P is used for the curing of unsaturated polyester resins.
TDS UP
PEROXAN PK295 P is used for the crosslinking of natural rubber and synthetic rubber, as well as polyolefins.
TDS CL
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PEROXAN PK295 P
Molecular weight:
CAS No.:
302.5
6731-36-8
Appearance:
Peroxide assay:
Active oxygen assay:
Bulk density at 20°C:
white powder
appx. 40%
appx. 4.23%
390 kg/m³
in an EPDM compound:
Maximum storage temperature (Ts max):
Storage stability as from date of delivery:
30°C
6 months
Keep packaging tightly closed in a well ventilated place at indicated storage temperature. Keep away from reducing agents e.g. amines, acids, alkalis, heavy metal compounds (e.g. accelerators, driers, metal soaps). Never weigh out in storage room.
Oxidizing agent. Decomposes violently under the influence of heat or by contact with reducing agent. Never mix with accelerators.
Organic Peroxides are more or less stable products but will decompose under the influence of heat. To minimize a loss of quality during storage, it is important that the recommended maximum storage temperature is not exceeded. If a minimum storage temperature is given, an undesirable process such as a solidification or phase separation, is known to occur below this temperature.
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Flash point: SADT: |
>SADT°C 70°C |
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The SADT (Self Accelerating Decomposition Temperature) is the lowest temperature at which a self accelerating decomposition may occur.
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Schlavenhorst 71 D-46395 Bocholt Germany |
Phone: +49 (0)2871 / 99 02-0 Fax: +49 (0)2871 / 99 02-50 www.pergan.com |
HPUPCL/003/0919 Page 1 of 2 |
PEROXAN PK295 P
Peroxyketale / Polymerization / Curing / Crosslinking
PEROXAN PK295 P is used for the curing of unsaturated polyester resins at elevated temperatures.
PEROXAN PK295 P is preferred for the curing of UP resin based hot press moulding formulations in the temperature range from 120° to 170°C.
The stability of this peroxyketal in an UP resin is hardly influenced by the presence of metal accelerators, pigments or fillers. PEROXAN PK295 P is therefore very suitable for pigmented and non-pigmented hot press moulding formulations where a long shelf life of the compound is required.
Depending on working conditions, the following peroxide dosage level is recommended:
PEROXAN PK295 P: 2,0 to 3,0 phr
PEROXAN PK295 P is recommended for the crosslinking of NBR, SBR, EP(D)M, LDPE and EVA.
Rubber compounds containing PEROXAN PK295 P have excellent scorch safety.
Safe processing temperature (t2): 115°C
Typical crosslinking temperature (t90): 145°C
The safe processing temperature t2 is defined as the temperature, at which the scorch time is longer than 20 minutes. The typical crosslinking temperature t90 is defined as the temperature at which 90% of the crosslinks in the compound are formed within about 12 minutes.
Please refer to the material safety data sheet (MSDS) for information concerning safe storage, use and handling of PEROXAN PK295 P. This information should be thoroughly reviewed prior to acceptance of this product. The MSDS is available for downloading at www.pergan.com or through contacting Pergan directly.
|
Schlavenhorst 71 D-46395 Bocholt Germany |
Phone: +49 (0)2871 / 99 02-0 Fax: +49 (0)2871 / 99 02-50 www.pergan.com |
HPUPCL/003/0919 Page 2 of 2 |
Material Safety Data Sheets
Here you can download safety data sheets according to Regulation (EC) no. 1907/2006.
Safety Data Sheets are an important source of information on chemicals, such as identity of the product,
occurring hazards, transport, safe handling and measures for prevention in case of danger