Description

Propylene Glycol, Polymer With Phthalic Anhydride, Maleic Anhydride And Ethylene Glycol is a specialized unsaturated polyester resin intermediate, widely recognized by its CAS number 63454-99-9. This compound is valued for its ability to form durable, cross-linked polymer networks with excellent chemical resistance and mechanical properties. It is a critical raw material for manufacturers in the coatings, composites, and adhesives industries seeking to produce high-performance thermoset plastics.

Application

• Unsaturated Polyester Resins (UPR): Primary component for the formulation of general-purpose and corrosion-resistant polyester resins.
• Gel Coats & Surface Coatings: Used to create smooth, protective, and weather-resistant finishes on fiberglass-reinforced plastics (FRP) for marine, automotive, and sanitary ware.
• Fiberglass Reinforced Composites: Binder in the production of sheets, panels, and molded components for construction, transportation, and industrial applications.
• Industrial Adhesives & Sealants: Base polymer for high-strength, chemically resistant bonding agents.
• Corrosion-Resistant Linings: Formulated into tank and pipe linings for chemical processing plants due to its stability against strong acids and organic solvents.
• Electrical Laminates: Used in the manufacture of printed circuit board (PCB) substrates and electrical insulation components.

Basic Information

Product Name	Propylene Glycol, Polymer With Phthalic Anhydride, Maleic Anhydride And Ethylene Glycol
CAS No.	63454-99-9
Molecular Formula	(C3H8O2.C4H2O3.C8H4O3.C2H6O2)x
Molecular Weight	Varies (Polymer)
Synonyms	Unsaturated Polyester Resin Prepolymer; Propylene Glycol-Phthalic Anhydride-Maleic Anhydride-Ethylene Glycol Copolymer; Poly(propylene glycol phthalate maleate ethylene glycol); UPR Intermediate; Polyester Alkyd Resin; Maleic-Phthalic Polyester Polyol; 1,2-Propanediol, polymer with 1,2-benzenedicarboxylic anhydride, 2,5-furandione and 1,2-ethanediol
EINECS	Contact for details

Quality Control

Our production of this polyester resin intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and performance. Key parameters such as acid value, viscosity, and reactivity are rigorously monitored. A Certificate of Analysis (COA) detailing specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve its reactivity and prevent premature gelation. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Viscous Pale Yellow to Amber Liquid
Acid Value (mg KOH/g)	20 - 40
Viscosity @ 25°C (cps)	1500 - 4500
Non-Volatile Content (%)	65 - 70
Gel Time @ 25°C (min)	Contact for details
Identification (IR)	Conforms

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