How to order United Initiators CUROX®I-300?

For bulk orders of United Initiators CUROX®I-300, please contact our sales team via the contact page (https://www.yunno.net/en/contact) or email us at huyu@yunno.net, or call/WhatsApp +86 137 7522 5407. We provide cold-chain logistics and technical support.

Do you provide technical data sheets (TDS) and safety data sheets (MSDS) for United Initiators CUROX®I-300?

Yes, Yunno Chemical provides full technical data sheets (TDS), certificates of analysis (COA), and GHS-compliant safety data sheets (MSDS) for qualified customers. Please contact our technical support team for more information.

United Initiators CUROX®I-300 Methyl Isobutyl Ketone Peroxide 37206-20-5 (CAS 37206-20-5)

CUROX® I-300 is a highly reactive liquid mixture whose main component is a methyl isobutyl ketone-based peroxide that has been desensitized using aliphatic hydrocarbons.This peroxide is used as a curing agent (radical source) for unsaturated polyester resins. It is primarily used for curing large molded parts under high-temperature conditions (60–120°C). Technical Data:

Appearance: Colorless liquid
Active oxygen content: approx. 10.5% w/w
Desensitizer: Fatty esters
Density (20°C): approx. 0.89 g/cm³
Viscosity (20°C): approx. 5 mPa·s
Solubility: Insoluble in water; miscible with alcohols and phthalates
Critical Temperature (SADT): Approximately 50°C
Refrigerated Stability: Remains liquid at temperatures below -25°C
Initiation temperature: approx. 55°C
Recommended storage temperature: Below 25°C
Shelf life at 25°C after delivery: 6 months
Compliant with ElektroG (EU Directives: RoHS 2002/95/EG, WEEE 2002/96/EG)

Applications:

Curing of polyester resins
Application: As a curing agent for UP resins; may be used in combination with cobalt accelerators
Temperature range: 60–120°C
Usage Level: 1–2% of the undiluted product; may be used in combination with 0.1–0.5% of the COB-1TX accelerator if necessary
Curing can occur at room temperature; the typical “pot life” of the resin plus peroxide mixture is 4–8 hours
The pot life can be extended by lowering the storage temperature
The “working time” for the resin + peroxide + accelerator mixture is typically 1–3 hours
The pot life can be extended by adding the inhibitor TC-510
Curing Properties: Has a relatively long gel time at room temperature but a short curing time; can be used in combination with cobalt accelerators
Above approximately 55°C (“initiation temperature”), curing occurs relatively quickly even without cobalt
Moderate exothermic reaction with low internal stress
Moderate degree of cure; post-curing at 80–120°C is recommended
Processing Methods: Specifically designed to provide a relatively long pot life while maintaining the lowest possible initiation temperature; therefore, it is particularly suitable for continuous impregnation of (corrugated) panels and applied gel coats, as well as fiber winding of pipes and tanks

Measurement data:

Reactivity of polyester resin for curing at room temperature: Curing according to DIN 16945 at 25°C with OPA resin (20 g in a test tube)
Reactivity for curing polyester resins at high temperatures: Curing according to DIN 16945 at different temperatures with OPA resin (20 g in a test tube)

Packaging:

CUROX® I-300 is standardly packaged in 20-kilogram polyethylene bottles.

Disclaimer: This information and all further technical recommendations reflect our current knowledge and experience based on internal testing using local raw materials and are intended to provide information about our products and their applications.This information should not be construed as a guarantee of specific performance characteristics of the described product or its suitability for a particular application, nor should it be interpreted as providing complete documentation of usage instructions. This information does not provide any warranty regarding the product or its shelf life characteristics, nor does it impose any liability or legal responsibility on us, including liability related to existing third-party intellectual property rights (particularly patent rights).We reserve the right to make any changes based on technical progress or further developments. Responsibility for the use of our products in accordance with our technical recommendations lies with the user; we have no control over the user’s applications and usage. It is the user’s responsibility to conduct thorough inspection and testing of incoming goods to verify their suitability for the intended application.

United Initiators CUROX®I-300 Methyl Isobutyl Ketone Peroxide 37206-20-5

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