Description

3-Hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,6-hexanediol, 1,1'-methylenebis [4-isocyanatocyclohexane] and 2-oxepanone, Me Et ketone oxime-blocked is a specialized, high-performance blocked polyurethane prepolymer designed for advanced coating and adhesive formulations. This product matters because it provides a stable, one-component system that cures upon exposure to heat or atmospheric moisture, offering superior weatherability, chemical resistance, and mechanical properties. It is essential for manufacturers in the automotive, industrial maintenance, and specialty plastics sectors seeking durable, high-gloss finishes and robust bonding solutions.

Application

• High-Performance Industrial Coatings: Used as a key resin in topcoats for automotive refinish, agricultural equipment, and heavy-duty machinery requiring excellent gloss retention and corrosion resistance.
• Moisture-Cure Wood Coatings: Formulated into clear and pigmented finishes for furniture, flooring, and cabinetry, providing a hard, durable, and chemically resistant surface.
• Adhesives and Sealants: Serves as a base polymer for elastic adhesives and construction sealants that demand strong adhesion, flexibility, and long-term durability under environmental stress.
• Plastic Coatings: Applied as a protective and decorative coating on plastic substrates in consumer electronics and automotive interiors.
• Marine and Protective Coatings: Formulated into anti-corrosive primers and topcoats for offshore structures, ships, and infrastructure exposed to harsh marine environments.
• Fiberglass Reinforced Plastic (FRP) Coatings: Provides a smooth, protective gel coat or topcoat for recreational vehicles, boats, and sanitary ware.

Basic Information

Product Name	3-Hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,6-hexanediol, 1,1'-methylenebis [4-isocyanatocyclohexane] and 2-oxepanone, Me Et ketone oxime-blocked
CAS No.	169873-99-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked Aliphatic Polyurethane Prepolymer; MEKO-blocked HDI-based Polyurethane; Oxime-blocked Polyisocyanate Resin; Aliphatic Polyurethane Crosslinker; 1,6-Hexamethylene Diisocyanate (HDI) based blocked prepolymer; Moisture-curable polyurethane resin; Thermally reactive polyurethane resin; Polycaprolactone polyol, HDI, MEKO blocked
EINECS	Contact for details

Quality Control

Our production of this blocked polyurethane prepolymer adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot is characterized for critical parameters including NCO content, viscosity, solids content, and blocking agent level. Comprehensive Certificates of Analysis (COA) documenting these specifications are 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) and must be protected from atmospheric moisture to prevent premature curing or gelation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 2
Solids Content	70 ± 2 %
Viscosity (at 25°C)	2000 - 5000 mPa·s
NCO Content (blocked)	8.0 - 10.0 %
Blocking Agent (MEKO) Content	Specified range
Identification (IR)	Conforms

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