Description

1,2-Propylene Glycol, Phthalic Anhydride Polymer is a specialized alkyd resin intermediate formed from the polycondensation of phthalic anhydride and propylene glycol. This compound is valued for its role as a key building block in the synthesis of high-performance, modified polyester resins and coatings. It is primarily sought by manufacturers in the paints, coatings, adhesives, and plastics industries for developing products with enhanced flexibility, adhesion, and chemical resistance.

Application

• Alkyd Resin Production: A fundamental monomer for manufacturing short, medium, and long oil alkyd resins used in industrial and decorative paints.
• Polyester Coatings: Serves as a backbone resin in formulations for coil coatings, can coatings, and other high-durability finish applications.
• Adhesive & Sealant Formulations: Imparts tack and flexibility in certain pressure-sensitive and structural adhesive systems.
• Plasticizer & Modifier: Acts as an internal plasticizer or modifier in various polymer systems to improve processability and end-product properties.
• Electrical Insulation Materials: Used in the production of insulating varnishes and compounds for the electrical industry.

Basic Information

Product Name	1,2-Propylene Glycol, Phthalic Anhydride Polymer
CAS No.	31976-47-3
Molecular Formula	(C11H12O5)n
Molecular Weight	Contact for details
Synonyms	Propylene Glycol Phthalate; Phthalic Anhydride-Propylene Glycol Copolymer; Poly(propylene glycol phthalate); Alkyd Resin, Propylene Glycol-Phthalic; 1,2-Propanediol, polymer with 1,2-benzenedicarboxylic anhydride; PG Phthalate Resin; Phthalic Anhydride Propylene Glycol Polyester
EINECS	Contact for details

Quality Control

Our 1,2-Propylene Glycol, Phthalic Anhydride Polymer is manufactured under a strict quality management system. Each batch undergoes rigorous testing for key parameters such as acid value, hydroxyl value, viscosity, and color to ensure consistency and performance for resin synthesis. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from strong alkalis and incompatible organic solvents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep container tightly sealed when not in use to minimize moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Viscous liquid to solid mass
Color (Gardner)	≤ 3
Acid Value (mg KOH/g)	5 - 15
Hydroxyl Value (mg KOH/g)	Contact for details
Viscosity (at 25°C)	Specified per grade
Identification (IR)	Conforms

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