Description

Phthalic Anhydride, Polymer With Ethylene Glycol, Maleic Anhydride And 3A,4,7,7 is a specialized unsaturated polyester resin intermediate, designed for high-performance applications requiring excellent reactivity and cross-linking potential. This compound is crucial for formulating advanced thermosetting polymers that offer superior mechanical strength, chemical resistance, and thermal stability. It is primarily needed by manufacturers in the coatings, adhesives, and composite materials industries seeking to enhance product durability and performance.

Application

• Unsaturated Polyester Resins (UPR): A key raw material for the production of high-grade UPRs used in fiberglass-reinforced plastics (FRP) for automotive parts, marine hulls, and construction panels.
• Industrial Coatings: Formulation of durable gel coats, topcoats, and corrosion-resistant linings for pipes, tanks, and industrial equipment.
• Adhesives & Sealants: Serves as a reactive component in structural adhesives and high-strength sealants for bonding metals, plastics, and composites.
• Electrical Laminates: Used in the manufacture of printed circuit board (PCB) substrates and electrical insulation components due to its good dielectric properties.
• Artificial Stone & Solid Surfaces: A critical binder in the production of engineered quartz, cultured marble, and other composite stone materials.
• Automotive Composites: Enables the production of lightweight, high-strength body panels, spoilers, and interior components.

Basic Information

Product Name	Phthalic Anhydride, Polymer With Ethylene Glycol, Maleic Anhydride And 3A,4,7,7
CAS No.	25748-93-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Unsaturated Polyester Prepolymer; Poly(ethylene glycol maleate phthalate); Maleic Anhydride-Phthalic Anhydride-Ethylene Glycol Copolymer; Polyester Resin Intermediate; UPR Intermediate; 3A,4,7,7-Tetrahydro-4,7-methano-1H-indene copolymer with ethylene glycol, maleic anhydride and phthalic anhydride; Alkyd Resin Modifier; Reactive Polyester Oligomer
EINECS	Contact for details

Quality Control

Our Phthalic Anhydride, Polymer With Ethylene Glycol, Maleic Anhydride And 3A,4,7,7 is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent reactivity, viscosity, acid value, and color meet precise customer and industry specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

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 heat sources, open flames, and incompatible materials such as strong oxidizing agents. The product may have limited shelf life; prolonged storage should be avoided, and material should be used on a first-in, first-out (FIFO) basis.

Specification

Item	Specification
Appearance	Viscous liquid to solid mass
Color (Gardner)	≤ 3
Acid Value (mg KOH/g)	20 - 40
Viscosity @ 25°C (cPs)	500 - 5000
Non-Volatile Content (%)	≥ 65
Gel Time @ 25°C (min)	Contact for details

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