Tert-Butyl Monoperoxymaleate
TBP-Maleate, Tert-Butyl Peroxymaleic Acid, Perbutyl MA, Luperco PMA 25.
- CAS
- 1931-62-0
- EC
- 217-691-1
- Sectors
- Plastics & Polymers, Coatings, Adhesives, Sealants & Elastomers
Tert-Butyl Monoperoxymaleate (CAS 1931-62-0) is a Technical Grade organic peroxide supplied as a white viscous paste and standardized to an active oxygen content of approximately 3.4%, used as a polymerization initiator for vinyl monomers and as a curing agent for unsaturated polyester resins in acrylic solid surface production. It is valued for its specific decomposition temperature profile, which allows for controlled chain growth in industrial polymer synthesis.
The product is frequently supplied as a 40% stable paste to ensure safe handling and storage, mitigating the high reactivity of the pure substance. It functions as an effective curing agent for unsaturated polyester resins, particularly in the manufacturing of acrylic solid surfaces and kitchen countertops.
This peroxymaleate derivative provides an active oxygen content of approximately 3.4%, ensuring consistent performance in room-temperature curing applications when used with accelerators. Its chemical structure grants it excellent solubility and compatibility with a wide range of organic resins and solvent systems.
Typical Properties
| Molecular formula | C8H12O5 |
|---|---|
| Molecular weight | 188.18 g/mol |
| Appearance | white viscous paste |
| Melting point | 130-131 °C |
| Water solubility | 642mg/L at 20°C |
| HS code | 29161995 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Tert-Butyl Monoperoxymaleate
Applications
- Polymerization Initiator: Used to trigger the chain reaction in the production of acrylic and styrene-based polymers.
- Resin Curing: Acts as a primary curing agent for unsaturated polyester resins in architectural and automotive components.
- Acrylic Surface Fabrication: Essential for the room-temperature hardening of acrylic resins used in solid surface countertop production.
Safety & Risks
Classified as an Organic Peroxide (Type D). It is highly heat-sensitive and poses a risk of explosive decomposition if exposed to heat. Always wear chemical-resistant gloves, safety goggles, and protective aprons during handling.
Packaging
Standard industrial formats include 20 kg Plastic Pails and 25 kg PE Drums with specialized venting caps.