Description

Bayer Desmodur R is a high-performance, blocked aliphatic polyisocyanate crosslinker. This product is essential for formulating advanced polyurethane coatings and adhesives that require excellent light stability and controlled reactivity. It is primarily used by manufacturers in the automotive, industrial maintenance, and plastics industries seeking to enhance product durability and processing characteristics. The compound is identified by CAS No. 39394-47-3.

Application

Desmodur R is a versatile blocked isocyanate used as a latent crosslinking agent in various high-performance systems.

• One-Component Polyurethane Coatings: Provides excellent weatherability and chemical resistance for automotive topcoats, coil coatings, and industrial finishes.
• Powder Coatings: Acts as a crosslinker in thermosetting powder coatings, offering good flow and surface properties.
• Adhesives and Sealants: Used in heat-curable adhesive formulations for enhanced bond strength and flexibility.
• Elastomers and Casting Systems: Imparts improved mechanical properties and hydrolysis resistance to polyurethane elastomers.
• Wire and Cable Insulation: Employed in coatings for wires requiring high thermal and electrical performance.
• Textile and Leather Finishes: Used to create durable, flexible coatings on technical textiles and synthetic leather.

Basic Information

Product Name	Bayer Desmodur R
CAS No.	39394-47-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Desmodur R; Blocked HDI trimer; Hexamethylene diisocyanate trimer, blocked; Aliphatic polyisocyanate, blocked; 1,6-Diisocyanatohexane homopolymer, blocked; HDI-BT; Crosslinker R; Urethane crosslinker R
EINECS	Contact for details

Quality Control

Our Bayer Desmodur R is produced and supplied under a rigorous quality management system. Each batch is tested to ensure it meets strict specifications for parameters such as NCO content, blocking agent content, viscosity, and color. A Certificate of Analysis (COA) documenting these results is available for every shipment to guarantee traceability and consistent performance in 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). This material is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent contact with atmospheric moisture, which can degrade the product.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
NCO Content (Blocked)	Contact for details
Viscosity (at 25°C)	Contact for details
Color (Gardner)	≤ 2
Specific Gravity (at 20°C)	Contact for details
Solvent Content	Contact for details

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