Bis(4-tert-butylcyclohexyl) Peroxydicarbonate is a cycloaliphatic peroxydicarbonate used as a thermal radical initiator, particularly in unsaturated polyester resin curing. It is identified by CAS No. 15520-11-3, molecular formula C₂₂H₃₈O₆, and molecular weight 398.5 g/mol.
Product selection centers on peroxide content, active oxygen, decomposition profile, dosage, processing temperature and temperature-controlled storage.
Product Identification
|
Parameter |
Value |
|
Chemical Name |
Bis(4-tert-butylcyclohexyl) Peroxydicarbonate |
|
CAS No. |
15520-11-3 |
|
Molecular Formula |
C₂₂H₃₈O₆ |
|
Molecular Weight |
398.5 g/mol |
|
Chemical Type |
Cycloaliphatic Peroxydicarbonate |
|
Physical Form |
White, free-flowing powder |
Key Technical Parameters
|
Parameter |
Typical Value |
|
Peroxide Content |
Approx. 95.0% w/w |
|
Active Oxygen |
Approx. 3.81% w/w |
|
Bulk Density |
Approx. 0.50 kg/L |
|
Melting Point |
Approx. 82°C |
|
SADT |
Approx. 45°C |
|
Kick-off Temperature |
50°C |
|
Recommended Storage Temperature |
Below 20°C |
|
Maximum Storage Temperature |
20°C |
|
Maximum Transport Temperature |
30°C |
|
Activity Maintenance |
6 months |
Decomposition Profile
Half-Life Data
The reported half-life values are 41°C for 10 hours, 57°C for 1 hour and 90°C for 1 minute, measured in 0.1 M benzene.
Process Relevance
These values help determine the relationship between initiator decomposition, curing temperature and process residence time.
Main Application
Unsaturated Polyester
The primary application is curing of unsaturated polyester resins. The peroxide decomposes thermally to generate radicals that initiate the curing reaction.
Composite Processing
The material can be evaluated in polyester-based composite formulations where the curing cycle requires a defined thermal initiation profile.
Selection Criteria
Peroxide Content
Approx. 95.0% w/w peroxide content provides the main assay reference for formulation calculations and incoming material inspection.
Active Oxygen
Approx. 3.81% w/w active oxygen provides a quantitative indicator of peroxide activity.
Thermal Profile
Half-life data should be matched with the actual curing temperature and residence time rather than evaluated from melting point alone.
Process Compatibility
Resin System
Compatibility depends on resin chemistry, monomer composition, fillers, pigments and other curing components.
Dosage
A technical reference for unsaturated polyester curing is 1–2% as supplied. Final dosage should be established from the required gel time and cure profile.
Cure Control
Trial formulations should assess peroxide dosage against temperature, gel time and curing response before production scale-up.
Storage & Transport Parameters
Storage Temperature
Recommended storage is below 20°C, with a maximum storage temperature of 20°C.
Transport Temperature
The referenced technical specification sets a maximum transport temperature of 30°C.
Activity Period
Activity maintenance is specified as 6 months from the date of delivery under the stated storage conditions.
Quality Control Points
Assay Verification
Peroxide content and active oxygen are the primary quantitative checks for confirming material specification.
Physical Check
Appearance, bulk density and melting point provide additional identification points during incoming inspection.
Batch Confirmation
The batch COA should be checked against the agreed specification before the material enters formulation or production.
Documentation for Qualification
Product Specification
The technical specification should define chemical identity, assay, active oxygen, physical form and thermal parameters.
COA
Batch-specific analytical results provide the data required for incoming quality verification.
Safety Documentation
Storage, transport and handling requirements should be reviewed before material approval and use.
FAQ
Q: What is Bis(4-tert-butylcyclohexyl) Peroxydicarbonate used for?
A: It is primarily used as a thermal radical initiator for unsaturated polyester resin curing and related composite processing.
Q: What is the CAS number?
A: The CAS number is 15520-11-3.
Q: What is the typical peroxide content?
A: The technically pure powder is specified at approximately 95.0% w/w peroxide content.
Q: What is the active oxygen content?
A: The typical active oxygen value is approximately 3.81% w/w.
Q: What are the reported half-life temperatures?
A: The reported values are 41°C / 57°C / 90°C for 10 hours / 1 hour / 1 minute, respectively, in 0.1 M benzene.
Q: What should be checked before production use?
A: Confirm the current product specification, batch COA, peroxide content, active oxygen, thermal profile, dosage, packaging and storage requirements against the intended formulation.
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