Description

Hexanedioic Acid, Polymer With 2,2-Dimethyl-1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol And 1,3-Isobenzofurandione CAS NO 25950-35-0 is a specialized polyester polyol resin, synthesized from adipic acid, neopentyl glycol, trimethylolpropane, and phthalic anhydride. This engineered polymer is valued for its excellent hydrolytic stability, low color, and controlled hydroxyl functionality, making it a critical performance component in demanding industrial formulations. It is primarily sought by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries for producing high-performance polyurethane systems.

Application

• High-Performance Polyurethane Coatings: Used as a key polyol component in two-component (2K) polyurethane coatings for automotive, industrial maintenance, and marine applications, providing excellent durability, chemical resistance, and gloss retention.
• Elastomers and Sealants: Serves as a building block for polyurethane elastomers and sealants requiring superior mechanical properties, flexibility, and resistance to weathering and hydrolysis.
• Adhesives and Binders: Incorporated into polyurethane adhesive formulations to enhance bond strength, thermal stability, and moisture resistance.
• Specialty Resins for Composites: Utilized in the formulation of resin systems for fiber-reinforced composites, contributing to improved processability and final part performance.
• Flexible Foams and Casting Systems: Acts as a polyol in the production of microcellular foams and cast polyurethane items where a balance of hardness and elasticity is required.

Basic Information

Product Name	Hexanedioic Acid, Polymer With 2,2-Dimethyl-1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol And 1,3-Isobenzofurandione
CAS No.	25950-35-0
Molecular Formula	(C6H10O4 • C5H12O2 • C6H14O3 • C8H4O3)x
Molecular Weight	Varies (Polymer)
Synonyms	Adipic Acid/Neopentyl Glycol/Trimethylolpropane/Phthalic Anhydride Copolymer; Polyester Polyol from Adipic Acid, NPG, TMP, and PA; Adipic Acid-NPG-TMP-PA Copolymer; Poly(neopentyl glycol adipate-co-trimethylolpropane adipate-co-phthalate); NPG/TMP Adipate Phthalate Polyester Polyol; Hydroxyl-Terminated Polyester Resin; CAS 25950-35-0 Polyester Polyol
EINECS	Contact for details

Quality Control

Our production of this polyester polyol adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as hydroxyl value, acid value, viscosity, and color are rigorously monitored. Certificates of Analysis (COA) detailing these specifications are provided with every shipment. We support compliance with relevant global regulatory frameworks, including REACH.

Storage

Preserve in a tightly closed container, protected from light. This product 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. Store away from incompatible materials such as strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 2.0
Viscosity @ 25°C (mPa·s)	Contact for details
Color (Gardner)	≤ 2
Water Content (%)	≤ 0.1

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