Description

1,3-Isobenzofurandione, Hexahydro-, Polymer With 2,2-Dimethyl-1,3-Propanediol CAS NO 61505-09-7 is a high-performance, saturated polyester polyol derived from hexahydrophthalic anhydride and neopentyl glycol. This specialized polymer is valued for its excellent hydrolytic stability, low color, and resistance to yellowing, making it a critical building block for demanding industrial applications. It is primarily sought by manufacturers in the coatings, adhesives, and specialty plastics industries for formulating premium-grade products.

Application

• High-Performance Coatings Resins: A key raw material for manufacturing saturated polyester resins used in coil coatings, automotive topcoats, and industrial maintenance paints, offering superior weatherability and chemical resistance.
• Polyurethane Systems: Serves as a polyol component in the production of polyurethane dispersions (PUDs), elastomers, and adhesives, contributing to enhanced mechanical properties and durability.
• Powder Coatings: Used in carboxyl-functional polyester resins for hybrid and primer powder coatings, providing excellent flow, leveling, and corrosion protection.
• Synthetic Lubricants & Plasticizers: Employed in the synthesis of complex ester base stocks for high-temperature lubricants and as polymeric plasticizers for PVC and other polymers.
• Unsaturated Polyester Resins (UPR) Modification: Incorporated to improve the flexibility, toughness, and hydrolytic stability of standard UPRs used in composites.
• Electrical Insulating Varnishes: Utilized in the formulation of wire enamels and impregnating resins due to its good electrical properties and thermal stability.

Basic Information

Item	Detail
Product Name	1,3-Isobenzofurandione, Hexahydro-, Polymer With 2,2-Dimethyl-1,3-Propanediol
CAS No.	61505-09-7
Molecular Formula	(C8H10O3 • C5H12O2)n
Molecular Weight	Polymer - Variable
Synonyms	Hexahydrophthalic Anhydride-Neopentyl Glycol Polyester Polyol; HHPA-NPG Polyester Polyol; Saturated Polyester Polyol from HHPA and NPG; Poly(hexahydrophthalic anhydride-co-neopentyl glycol); Neopentyl Glycol Hexahydrophthalate Polymer; Poly(neopentyl glycol hexahydrophthalate); Carboxyl-Terminated Polyester from HHPA/NPG; NPG-HHPA Polyester Diol
EINECS	Contact for details

Quality Control

Our production of this polyester polyol adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as acid value, hydroxyl value, viscosity, and color index are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each 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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product properties.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Acid Value (mg KOH/g)	< 5.0
Hydroxyl Value (mg KOH/g)	Contact for details
Viscosity @ 25°C (cPs)	Contact for details
Color (Gardner)	< 2
Water Content (%)	< 0.1
Identification (IR)	Conforms

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