Description

Acrylonitrile-Styrene-Alphamethylstyrene-n-Phenylmaleimide is a high-performance, heat-resistant engineering terpolymer. This advanced material is engineered to provide superior thermal stability and mechanical properties compared to standard styrenic copolymers. It is essential for manufacturers requiring durable, high-temperature resistant components in demanding environments. Key industries include automotive, electronics, and specialty plastics.

Application

• Automotive Components: Used in under-the-hood parts, connectors, and housings that require long-term heat resistance.
• Electrical & Electronic Housings: Ideal for sockets, switches, and enclosures where flame retardancy and thermal stability are critical.
• Industrial Machinery Parts: Manufacture of gears, bearings, and other components exposed to friction and elevated temperatures.
• Consumer Appliances: Used in parts for hair dryers, coffee makers, and other heat-generating devices.
• Optical Media & Data Storage: Suitable for high-precision molded parts requiring dimensional stability.
• Specialty Films and Sheets: Production of thermally stable films for technical and industrial applications.

Basic Information

Product Name	Acrylonitrile-Styrene-Alphamethylstyrene-n-Phenylmaleimide
CAS No.	94858-30-7
Molecular Formula	(C3H3N·C8H8·C9H10·C10H7NO2)n
Molecular Weight	Polymer (Variable)
Synonyms	ASA-AMS-PMI Terpolymer; Acrylonitrile/Styrene/α-Methylstyrene/N-Phenylmaleimide Copolymer; Heat-Resistant ASA Terpolymer; N-Phenylmaleimide-Modified ASA; Poly(acrylonitrile-co-styrene-co-α-methylstyrene-co-N-phenylmaleimide); Terpolymer of Acrylonitrile, Styrene, α-Methylstyrene, and N-Phenylmaleimide; Advanced Thermal ASA
EINECS	Contact for details

Quality Control

Our Acrylonitrile-Styrene-Alphamethylstyrene-n-Phenylmaleimide is produced under a stringent quality management system. Each batch is tested to ensure consistent thermal properties, molecular weight distribution, and compositional purity. Comprehensive testing includes FTIR for identification and thermal analysis (HDT, Vicat) for performance verification. Certificates of Analysis (COA) detailing all specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and heat sources to maintain polymer integrity.

Specification

Item	Specification
Appearance	Pellets or Powder
Color	Off-White to Pale Yellow
Identification (IR)	Conforms to Standard
Acrylonitrile Content	20 - 35 %
Heat Deflection Temperature (HDT)	> 110 °C
Vicat Softening Temperature	> 115 °C
Melt Flow Rate (MFR)	5 - 25 g/10min
Moisture Content	< 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.