Description

Sulfurous Acid, Monosodium Salt, Polymer With 1,4-Butanediol, 2-Butene-1,4-Diol, 1,6-Diisocyanatohexane And Methyloxirane, Me Et Ketone Oxime-Blocked is a specialized blocked polyurethane prepolymer designed for controlled reactivity and enhanced shelf stability. This advanced chemical is critical for formulators seeking to develop high-performance coatings, adhesives, and sealants with precise curing profiles. It is primarily utilized by manufacturers in the industrial coatings, automotive, and construction sectors where durable, chemically resistant finishes are required.

Application

• Industrial Maintenance Coatings: Used as a key resin component in high-durability protective coatings for steel structures, pipelines, and industrial equipment.
• Automotive OEM and Refinish: Serves in primer-surfacers and clear coats that require excellent chemical resistance and weatherability.
• Heavy-Duty Adhesives & Sealants: Employed in formulating one-component (1K) polyurethane systems that cure upon exposure to atmospheric moisture.
• Marine and Offshore Coatings: Provides a robust film-forming base for anti-corrosive coatings exposed to harsh saline environments.
• Plastic Coatings: Enhances adhesion and flexibility in coatings applied to automotive plastics and consumer electronics.
• Wood Finishes: Used in high-performance wood coatings for flooring and furniture, offering scratch and solvent resistance.

Basic Information

Product Name	Sulfurous Acid, Monosodium Salt, Polymer With 1,4-Butanediol, 2-Butene-1,4-Diol, 1,6-Diisocyanatohexane And Methyloxirane, Me Et Ketone Oxime-Blocked
CAS No.	129783-35-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked Polyurethane Prepolymer; Oxime-blocked HDI-based Prepolymer; Ketoxime-blocked Polyurethane Resin; MEKO-blocked Polyisocyanate; Thermally Curable Polyurethane Resin; 1,6-Diisocyanatohexane, polymer with 1,4-butanediol, 2-butene-1,4-diol and methyloxirane, monosodium sulfite-blocked; Polyurethane, MeEt ketoxime-blocked
EINECS	Contact for details

Quality Control

Our production of this blocked polyurethane prepolymer adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed for critical parameters including blocking agent content, free NCO level, viscosity, and solids content. A comprehensive Certificate of Analysis (COA) documenting these 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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed when not in use to prevent moisture ingress, which can lead to premature curing or gelation. Keep away from heat sources and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Solids Content	70 - 75%
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.