Description

Polycarbodiimide is a versatile crosslinking agent and polymer stabilizer, essential for enhancing the durability and performance of various polymeric materials. Its primary value lies in its ability to efficiently react with carboxylic acid end groups, preventing polymer degradation and improving hydrolytic stability under demanding conditions. This makes it a critical component for manufacturers in the coatings, adhesives, and high-performance plastics industries seeking to extend product lifespan and reliability.

Application

• Polymer Stabilization: Used as a hydrolytic stabilizer in polyester-based polyurethanes, coatings, and adhesives to prevent chain scission and maintain mechanical properties.
• Crosslinking Agent: Functions as a crosslinker for carboxyl-terminated polymers, improving film integrity, chemical resistance, and thermal stability in industrial coatings.
• Adhesive Formulations: Enhances the durability and water resistance of structural and laminating adhesives, particularly in automotive and construction applications.
• Resin Modification: Incorporated into alkyd, acrylic, and polyester resins to modify properties and improve weatherability for exterior coatings.
• Textile & Leather Finishing: Applied in finishing agents to impart durable water repellency (DWR) and enhanced durability to fabrics and leather goods.
• Composite Materials: Used in the production of fiber-reinforced plastics (FRP) to improve interfacial adhesion and environmental resistance.

Basic Information

Item	Detail
Product Name	Polycarbodiimide
CAS No.	25215-75-2
Molecular Formula	(R-N=C=N-R')n
Molecular Weight	Varies by grade and chain length
Synonyms	Carbodiimide homopolymer; Poly(1,3-di-p-tolylcarbodiimide); Polycarbodiimide crosslinker; Carbodiimide polymer; Hydrolytic stabilizer; Polymer stabilizer; PCDI; Polymeric carbodiimide; Crosslinking agent PCD
EINECS	Contact for details

Quality Control

Our Polycarbodiimide is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including assessment of active carbodiimide content, viscosity, and solubility. Certificates of Analysis (COA) detailing purity and key specifications are provided with every shipment to guarantee supply reliability and product consistency for your formulations.

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 strong acids and incompatible materials such as organic solvents, as indicated by its chemical properties. Under these conditions, the product remains stable for the duration of its shelf life.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Active N=C=N Content	≥ 95% (by titration)
Viscosity (25°C)	Specification available upon request
Solubility	Soluble in common organic solvents (e.g., acetone, DMF, THF)
Identification (IR)	Conforms to reference spectrum
Moisture Content	< 0.5% (Karl Fischer)

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