Description

1,3-Benzenedicarboxylic Acid, Polymer With 1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid And 2,2-Dimethyl-1,3-Propanediol CAS NO 29351-96-0 is a high-performance, synthetic polyester resin known for its excellent durability and chemical resistance. This polymer is engineered to provide superior thermal stability and mechanical properties, making it a critical component in demanding industrial applications. It is primarily sought after by manufacturers in the coatings, adhesives, and specialty plastics industries for creating high-quality, long-lasting products.

Application

• High-Performance Industrial Coatings: Used as a key resin in powder coatings and coil coatings for appliances, automotive parts, and architectural aluminum, providing excellent weatherability and corrosion resistance.
• Durable Adhesives and Sealants: Serves as a base polymer for structural adhesives and sealants requiring strong bonding, flexibility, and resistance to environmental stress.
• Specialty Plastic Modifiers: Incorporated into engineering plastics and composites to enhance thermal stability, impact strength, and surface finish.
• Electrical Insulation Materials: Utilized in the formulation of wire enamels and insulating varnishes due to its good dielectric properties and thermal endurance.
• Protective Can and Container Coatings: Applied in food-contact and industrial container linings where chemical resistance and barrier properties are paramount.
• Automotive Topcoats and Primers: A component in automotive paint systems that demand high gloss retention, scratch resistance, and protection from fuels and solvents.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid, Polymer With 1,3-Dihydro-1,3-Dioxo-5-Isobenzofurancarboxylic Acid And 2,2-Dimethyl-1,3-Propanediol
CAS No.	29351-96-0
Molecular Formula	(C8H6O4·C9H4O5·C5H12O2)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(1,3-phenylenedioxydicarbonyl-co-4,4'-isopropylidenediphenoxy); Polyester resin from isophthalic acid, trimellitic anhydride, and neopentyl glycol; Isophthalic Acid-Neopentyl Glycol-Trimellitic Anhydride Copolymer; IPA-NPG-TMA Terpolymer; NPG-IPA-TMA Polyester; TMA-modified IPA/NPG polyester; Thermosetting polyester resin; Powder coating polyester resin
EINECS	Contact for details

Quality Control

Our production of this polyester resin adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as acid value, hydroxyl value, viscosity, glass transition temperature (Tg), and color are rigorously monitored. Certificates of Analysis (COA) detailing these specifications are available for 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 room temperature (15-25°C/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent moisture absorption, which can affect product performance. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Acid Value (mg KOH/g)	20 - 50
Hydroxyl Value (mg KOH/g)	Contact for details
Softening Point (°C)	90 - 120
Glass Transition Temp, Tg (°C)	50 - 70
Viscosity (mPa·s, @ 200°C)	Contact for details
Color (Gardner)	≤ 2
Gel Time (sec, @ 200°C)	Contact for details

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