Description

2-Propanol, 1,1',1''-Nitrilotris-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)] And 1,1'-Methylenebis[4-Isocyanatobenzene] CAS NO 68928-89-2 is a specialized polyurethane prepolymer or block copolymer, synthesized from a triol, a polyether diol, and MDI (methylene diphenyl diisocyanate). This compound matters for its ability to impart enhanced flexibility, toughness, and tailored reactivity into final polymer matrices. It is primarily needed by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producing high-performance composites and specialty resins.

Application

• High-Performance Coatings: Used as a reactive component in polyurethane coatings for industrial, automotive, and protective applications, providing excellent durability and chemical resistance.
• Adhesives & Sealants: Serves as a key prepolymer in formulating flexible, strong polyurethane adhesives and sealants with good adhesion to various substrates.
• Elastomer Production: Acts as a building block for casting or thermoplastic polyurethane (TPU) elastomers used in wheels, gaskets, and industrial parts.
• Composite Materials: Incorporated as a matrix resin or modifier in fiber-reinforced composites to improve impact strength and interlaminar bonding.
• Specialty Resins: Utilized in the synthesis of custom resin systems for encapsulation, potting, or molding applications requiring specific mechanical properties.
• Textile & Leather Finishing: Employed in coatings and binders for textiles and synthetic leather to enhance water resistance, abrasion resistance, and feel.

Basic Information

Product Name	2-Propanol, 1,1',1''-Nitrilotris-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)] And 1,1'-Methylenebis[4-Isocyanatobenzene]
CAS No.	68928-89-2
Molecular Formula	Typically a complex polymer mixture; Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Polyurethane prepolymer based on MDI and polyether triol; MDI-polyether triol copolymer; Nitrilotris(2-propanol) polymer with poly(propylene glycol) and methylene bis(4-phenyl isocyanate); Polyoxypropylene triol-MDI prepolymer; Block copolymer of tris(2-hydroxypropyl)amine, PPG, and MDI; Isocyanate-terminated polyether prepolymer; 4,4'-MDI copolymer with polypropylene glycol and tris(hydroxypropyl)amine
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems. Each batch is characterized for critical parameters including isocyanate (NCO) content, viscosity, hydroxyl value, and residual monomer levels to ensure consistent performance. Certificates of Analysis (COA) detailing these specifications are available upon request.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for the specific grade (typically between 15°C and 25°C). This product is hygroscopic (moisture-sensitive). Protect from moisture ingress to prevent premature reaction and viscosity increase.

Specification

Item	Specification
Appearance	Viscous liquid (Color may vary)
Identification (IR)	Conforms to structure
NCO Content	As per grade (e.g., 5-15%)
Viscosity @ 25°C	As per grade
Hydroxyl Value	As per grade
Specific Gravity	As per grade
Moisture Content	< 0.05% (Karl Fischer)

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