Description

Sulfurous acid, monosodium salt, polymer with 2-butene-1,4-diol, methyloxirane and N,N',2-tris(6-isocyanatohexyl)imidodicarbonic diamide, Me Et ketone oxime-blocked is a specialized blocked polyisocyanate prepolymer designed for controlled reactivity in advanced coating systems. This product matters for formulators seeking to create high-performance, one-component (1K) polyurethane coatings that cure at elevated temperatures, offering excellent shelf stability and predictable film properties. It is primarily needed by manufacturers in the automotive OEM, industrial maintenance, and specialty plastics coating industries for applications requiring durability, chemical resistance, and weatherability.

Application

• Automotive OEM Clearcoats and Basecoats: As a crosslinker in high-bake systems for exterior body panels, providing exceptional gloss, scratch resistance, and long-term durability.
• Industrial Maintenance Coatings: For protective coatings on steel structures, pipelines, and industrial equipment requiring robust chemical and corrosion resistance.
• Coil and Can Coatings: In formulations for metal packaging and pre-coated metal sheets, where high-speed curing and excellent adhesion are critical.
• Plastic Substrate Coatings: For coating automotive plastics, consumer electronics, and other plastic components, enhancing surface hardness and aesthetic quality.
• Adhesives and Sealants: As a reactive component in heat-curable polyurethane adhesives for demanding bonding applications.
• Wire and Cable Enamels: Providing insulation coatings with good electrical properties and thermal stability.

Basic Information

Item	Details
Product Name	Sulfurous acid, monosodium salt, polymer with 2-butene-1,4-diol, methyloxirane and N,N',2-tris(6-isocyanatohexyl)imidodicarbonic diamide, Me Et ketone oxime-blocked
CAS No.	129783-39-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked polyisocyanate prepolymer; MEKO-blocked HDI trimer/ polyol copolymer; Oxime-blocked aliphatic polyisocyanate; Thermally reactive polyurethane crosslinker; 1K PU resin hardener; Hexamethylene diisocyanate (HDI) based blocked prepolymer; Sulfurous acid, sodium salt, polymer with 2-butene-1,4-diol, propylene oxide and N,N',2-tris(6-isocyanatohexyl)imidodicarbonic diamide, methyl ethyl ketoxime-blocked
EINECS	Contact for details

Quality Control

Our blocked polyisocyanate prepolymers are manufactured under strict process controls to ensure batch-to-batch consistency and performance reliability. Quality is verified through a comprehensive suite of analytical tests, including measurement of NCO content (blocked), solids content, viscosity, and deblocking temperature. Certificates of Analysis (COA) detailing these specifications are available for every shipment. Our production adheres to ISO 9001 quality management standards.

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 (25°C)	2000 - 5000 mPa·s
Blocked NCO Content	10.0 - 12.0 %
Deblocking Temperature	~130 - 150 °C
Density (25°C)	~1.10 g/cm³
Flash Point	> 100 °C

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