Description

1,3-Benzenedicarboxylic acid, polymer with 2,2-dimethyl-1,3-propanediol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, hexanedioic acid, 1,1-methylenebis4-isocyanatobenzene and 2,2-oxybisethanol CAS NO 138519-52-5 is a high-performance, branched polyester-polyurethane copolymer designed for demanding industrial applications. This specialized polymer offers a unique balance of chemical resistance, mechanical strength, and thermal stability, making it a critical component in advanced material formulations. It is primarily sought by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for specialty resin and composite production.

Application

• High-Performance Coatings: Used as a key resin in industrial, automotive, and protective coatings requiring excellent durability, gloss retention, and chemical resistance.
• Advanced Adhesives & Sealants: Serves as a base polymer for structural adhesives and flexible sealants, providing strong bonding and environmental resistance.
• Specialty Elastomers: Formulated into polyurethane elastomers for gaskets, rollers, and industrial parts that demand toughness and resilience.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced plastics (FRP) and other composite systems to enhance interfacial adhesion and performance.
• Industrial Resins: Utilized in the formulation of casting resins, potting compounds, and encapsulants for electrical and electronic components.
• Textile & Leather Finishing: Employed in coatings and binders to impart water resistance, flexibility, and abrasion resistance to fabrics and synthetic leather.

Basic Information

Product Name	1,3-Benzenedicarboxylic acid, polymer with 2,2-dimethyl-1,3-propanediol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, hexanedioic acid, 1,1-methylenebis[4-isocyanatobenzene] and 2,2-oxybis[ethanol]
CAS No.	138519-52-5
Molecular Formula	(C8H6O4 · C5H12O2 · C6H14O3 · C6H10O4 · C15H10N2O2 · C4H10O3)n
Molecular Weight	Polymer - Contact for details
Synonyms	Isophthalic Acid-Diethylene Glycol-Neopentyl Glycol-Adipic Acid-MDI-Trimethylolpropane Copolymer; Polyester-polyurethane resin based on isophthalic acid, adipic acid, MDI, TMP, NPG, and DEG; Branched Aliphatic-Aromatic Polyester Polyurethane; MDI-modified Polyester Polyol; CAS 138519-52-5; Adipic acid/Isophthalic acid/MDI/TMP/NPG/DEG copolymer; Thermoplastic Polyurethane (TPU) Polyol
EINECS	Contact for details

Quality Control

Our production of this advanced copolymer adheres to strict quality management systems, ensuring batch-to-batch consistency for critical formulation properties. Key parameters such as hydroxyl value, acid value, viscosity, and color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each 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, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flame. This material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption which can affect product performance.

Specification

Item	Specification
Appearance	Viscous liquid to solid resin
Color (Gardner)	≤ 3
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 2.0
Viscosity @ 25°C (cPs)	Contact for details
Solid Content (%)	Contact for details
Water Content (KF)	≤ 0.1%
Identification (IR)	Conforms

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