Description

Sulfurous Acid, Monosodium Salt, Polymer With 2-Butene-1,4-Diol, 1,6-Diisocyanatohexane And Methyloxirane, Me Et Ketone Oxime-Blocked is a specialized blocked polyisocyanate prepolymer, designed to provide a latent crosslinking functionality that activates upon heating. This compound is engineered for high-performance applications where controlled reactivity, enhanced shelf stability, and robust final film properties are critical. It is primarily utilized by formulators in the coatings, adhesives, and sealants industries seeking to develop advanced, durable products.

Application

• High-Performance Industrial Coatings: Used as a crosslinker in heat-cure systems for automotive OEM, refinish, and industrial maintenance coatings, providing excellent chemical resistance, hardness, and durability.
• Adhesive Formulations: Serves as a key component in structural and laminating adhesives that require thermal curing for ultimate bond strength and environmental resistance.
• Specialty Sealants: Incorporated into one-component, moisture-resistant sealants that cure upon application of heat, ideal for automotive and construction applications.
• Wire and Can Coatings: Employed in formulating insulating enamels and protective interior linings where thermal curing ensures a uniform, pinhole-free, and chemically resistant film.
• Powder Coatings: Acts as a crosslinking agent in powder coating formulations, contributing to low-temperature cure profiles and excellent flow and leveling characteristics.
• Elastomer Modification: Used to modify the properties of polyurethane and other elastomers, enhancing their thermal stability and mechanical performance.

Basic Information

Product Name	Sulfurous Acid, Monosodium Salt, Polymer With 2-Butene-1,4-Diol, 1,6-Diisocyanatohexane And Methyloxirane, Me Et Ketone Oxime-Blocked
CAS No.	129870-83-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked Polyisocyanate Prepolymer; Oxime-blocked HDI-based Polyisocyanate; Methyl Ethyl Ketoxime-blocked Polyisocyanate; MEKO-blocked Polyurethane Crosslinker; Hexamethylene Diisocyanate (HDI) Trimer, Oxime-blocked; Polyurethane Curing Agent, Blocked; 1,6-Diisocyanatohexane, polymer with 2-butene-1,4-diol and methyloxirane, oxime-blocked; Sulfurous acid, monosodium salt, polymer with 2-butene-1,4-diol, 1,6-diisocyanatohexane and methyloxirane, methyl ethyl ketoxime-blocked
EINECS	Contact for details

Quality Control

Our production of this blocked polyisocyanate adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as blocking agent content, free NCO content, viscosity, and solids content are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to premature reaction and gelation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Solids Content	70 ± 2 %
Viscosity (at 25°C)	2000 - 5000 mPa·s
Blocked NCO Content	10.0 - 12.0 %
Free NCO Content	≤ 0.5 %
Specific Gravity (25°C)	1.05 - 1.15
Flash Point	> 100 °C

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