Description

1,3-Benzenedicarboxylic Acid, Polymer With 3-Methyl-1,5-Pentanediol CAS NO 76962-70-4 is a high-performance polyester polyol derived from isophthalic acid. This specialized polymer is valued for its ability to impart enhanced mechanical strength, chemical resistance, and thermal stability to final formulations. It is a critical raw material for manufacturers in the polyurethane, coatings, adhesives, and specialty elastomers industries seeking to upgrade product performance.

Application

• Polyurethane Elastomers: Used as a hard segment component to produce high-performance elastomers with superior tensile strength, abrasion resistance, and load-bearing capacity.
• Coatings and Paints: Serves as a key polyol in high-solids, powder, and solvent-borne coatings, providing excellent durability, gloss retention, and chemical resistance.
• Adhesives and Sealants: Incorporated into formulations to enhance adhesive strength, flexibility, and resistance to environmental factors like moisture and UV exposure.
• Thermoplastic Polyurethanes (TPU): A vital building block for TPUs used in automotive parts, industrial hoses, cables, and consumer goods requiring a balance of toughness and processability.
• Industrial Resins: Employed in the synthesis of specialty polyester resins for composites and industrial applications demanding high performance.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Polymer With 3-Methyl-1,5-Pentanediol
CAS No.	76962-70-4
Molecular Formula	(C8H6O4·C6H14O2)n
Molecular Weight	Polymeric substance (varies by n)
Synonyms	Poly(3-methyl-1,5-pentanediol isophthalate); Isophthalic Acid Polymer with 3-Methyl-1,5-pentanediol; Poly(3-methylpentamethylene isophthalate); 3-Methyl-1,5-pentanediol-isophthalic acid copolymer; Poly(isophthalate of 3-methyl-1,5-pentanediol); Polyester polyol from isophthalic acid and 3-methyl-1,5-pentanediol; MPD-I Polyol
EINECS	Contact for details

Quality Control

Our production of this polymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as hydroxyl value, acid value, viscosity, and molecular weight distribution are rigorously controlled. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white solid / pellets
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 2.0
Viscosity @ 75°C (mPa·s)	Contact for details
Moisture Content (%)	≤ 0.05
Glass Transition Temp (Tg)	Contact for details

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