Description

1,3-Isobenzofurandione, Polymer With Methyloxirane And 1,2,3-Propanetriol is a specialized polymeric resin derived from phthalic anhydride, propylene oxide, and glycerol, commonly known as an alkyd or polyester polyol. This compound matters as a versatile intermediate that provides excellent adhesion, flexibility, and chemical resistance in formulated coatings and adhesives. Industrial manufacturers in the paints, coatings, and polymer synthesis sectors need this product to develop high-performance, durable finishes for metals, plastics, and other substrates. Its consistent quality is critical for ensuring batch-to-batch reliability in demanding production environments.

Application

• Industrial Coatings Binder: A key resin component in high-performance protective coatings for automotive, marine, and industrial equipment, offering enhanced durability and weather resistance.
• Adhesive & Sealant Formulation: Used as a polyol component in polyurethane adhesives and sealants, contributing to strong bonding, flexibility, and moisture resistance.
• Polymer Modification: Serves as a reactive intermediate for modifying polyester and alkyd resins to improve their mechanical properties and processing characteristics.
• Can & Coil Coatings: Employed in the formulation of coatings for metal packaging (cans) and coil coating applications, providing excellent adhesion and formability.
• Electrical Insulating Varnishes: A component in varnishes and impregnating resins for electrical motors and transformers, due to its good dielectric properties and thermal stability.
• Printing Inks: Used in the manufacture of specialty printing inks that require good pigment wetting, gloss, and adhesion to various surfaces.

Basic Information

Product Name	1,3-Isobenzofurandione, Polymer With Methyloxirane And 1,2,3-Propanetriol
CAS No.	26373-03-5
Molecular Formula	(C8H4O3·C3H6O·C3H8O3)x
Molecular Weight	Varies (Polymer)
Synonyms	Phthalic Anhydride-Glycerol-Propylene Oxide Polymer; Alkyd Resin, PA-G-PO type; Poly(phthalic anhydride-co-glycerol-co-propylene oxide); Glycerol Phthalic Anhydride Propylene Oxide Copolymer; Polyester Polyol from PA, Gly, and PO; PA/Gly/PO Terpolymer; Phthalic Alkyd Resin; Propoxylated Glycerol Phthalate
EINECS	Contact for details

Quality Control

Our 1,3-Isobenzofurandione, Polymer With Methyloxirane And 1,2,3-Propanetriol is manufactured under a strict quality management system. Every production batch undergoes rigorous analytical testing to ensure it meets precise specifications for viscosity, acid value, hydroxyl value, and color. Certificates of Analysis (COA) documenting these parameters are available upon request. We are committed to supplying material with the consistency and purity required for industrial-scale formulation.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C/59-77°F). Keep the container tightly sealed when not in use to prevent moisture absorption, which can affect product performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Viscous liquid to solid resin
Color (Gardner)	≤ 4
Acid Value (mg KOH/g)	≤ 10
Hydroxyl Value (mg KOH/g)	150 - 250
Viscosity (at 25°C, mPa·s)	2000 - 8000
Solid Content (%)	≥ 99.0
Water Content (Karl Fischer, %)	≤ 0.2

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