Description

1,3-Benzenedicarboxylic acid, polymer with dimethyl 1,4-benzenedicarboxylate, 2,2-dimethyl-1,3-propanediol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol and hexanedioic acid CAS NO 65421-56-9 is a high-performance, branched polyester polyol resin. This specialized polymer is engineered to deliver exceptional durability, flexibility, and chemical resistance in demanding industrial formulations. It is a critical raw material for manufacturers seeking to enhance the performance characteristics of their final products, particularly in the coatings, adhesives, and elastomers sectors.

Application

• High-Performance Polyurethane Coatings: Serves as a key polyol component in two-component (2K) polyurethane systems for industrial, automotive, and marine coatings, providing excellent weatherability, gloss retention, and mechanical strength.
• Elastomers and Sealants: Used in the formulation of flexible polyurethane elastomers, sealants, and gaskets that require a balance of toughness, elongation, and resistance to oils and solvents.
• Adhesives and Binders: Imparts strong adhesion and cohesive strength in structural and laminating adhesives, as well as in binder systems for composites and foundry sands.
• Specialty Resins for Composites: Acts as a reactive modifier or primary resin in fiber-reinforced plastic (FRP) composites, improving impact resistance and processing characteristics.
• Flexible Foams: Can be utilized in the production of specialized, high-resilience flexible polyurethane foams for technical applications.
• Industrial Flooring and Linings: A vital ingredient in chemically resistant flooring, tank linings, and protective coatings for concrete and metal substrates.

Basic Information

Item	Detail
Product Name	1,3-Benzenedicarboxylic acid, polymer with dimethyl 1,4-benzenedicarboxylate, 2,2-dimethyl-1,3-propanediol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol and hexanedioic acid
CAS No.	65421-56-9
Molecular Formula	(C8H6O4 · C10H10O4 · C5H12O2 · C6H14O3 · C6H10O4)n
Molecular Weight	Polymer - Variable
Synonyms	Polyester polyol resin (branched); Poly(neopentyl glycol-co-2-ethyl-2-(hydroxymethyl)-1,3-propanediol-co-isophthalic acid-co-terephthalic acid-co-adipic acid); Polyol based on isophthalic acid, terephthalic acid, adipic acid, neopentyl glycol (NPG), and trimethylolpropane (TMP); IPA/TPA/Adipic acid/NPG/TMP polyester polyol; Branched aromatic-aliphatic polyester polyol; Hydroxyl-functional polyester resin
EINECS	Contact for details

Quality Control

Our polyester polyol resins are manufactured under a strict quality management system. Each batch is characterized by key parameters including hydroxyl value, acid value, viscosity, and color to ensure consistent performance and batch-to-batch reproducibility. Comprehensive Certificates of Analysis (COA) documenting these specifications are provided with every shipment 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 temperatures between 15°C and 25°C (59°F and 77°F). Keep away from heat sources and open flame. Under these conditions, the product is typically stable for 12-24 months from the date of manufacture. Moisture absorption should be minimized.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 2.0
Viscosity @ 25°C (mPa·s)	Contact for details
Water Content (%)	≤ 0.1

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