Description

3-Isopropenyl-Alpha,α-Dimethylbenzyl Isocyanate is a specialized aliphatic isocyanate monomer featuring a reactive NCO group and a polymerizable isopropenyl moiety. This dual functionality makes it a critical building block for synthesizing advanced polymers with tailored properties, such as enhanced weatherability, chemical resistance, and adhesion. It is primarily sought after by R&D chemists and formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for the production of specialty cross-linking agents and polymer modifiers.

Application

• High-Performance Polyurethane Coatings: Used as a cross-linker to produce coatings with excellent gloss retention, hardness, and resistance to chemicals and UV degradation for automotive and industrial applications.
• Specialty Adhesives and Sealants: Serves as a key monomer for formulating adhesives with superior bonding strength, flexibility, and durability under harsh environmental conditions.
• Elastomer Synthesis: Employed in the production of polyurethane and polyurea elastomers that require a balance of mechanical strength and weatherability.
• Polymer Modification: Acts as a reactive intermediate to introduce isocyanate functionality into polymer backbones, enabling further customization of material properties.
• Cross-linking Agent for Resins: Utilized to cross-link hydroxyl-functional resins, enhancing their thermal and mechanical performance.
• R&D and Pharmaceutical Intermediates: Functions as a versatile building block in organic synthesis for creating novel compounds, including potential pharmaceutical intermediates.

Basic Information

Item	Detail
Product Name	3-Isopropenyl-Alpha,α-Dimethylbenzyl Isocyanate
CAS No.	2094-99-7
Molecular Formula	C13H15NO
Molecular Weight	201.26 g/mol
Synonyms	m-TMI; 3-Isopropenyl-α,α-dimethylbenzyl isocyanate; 1-Isocyanato-1-(3-isopropenylphenyl)-1-methylethane; 3-(1-Isocyanato-1-methylethyl)-α-methylstyrene; 3-Isopropenyl-α-methylbenzyl isocyanate; meta-Isopropenyl-α,α-dimethylbenzyl isocyanate; TMI (common abbreviation); m-Isopropenyl-α,α-dimethylbenzyl isocyanate
EINECS	218-222-3

Quality Control

Our production of 3-Isopropenyl-Alpha,α-Dimethylbenzyl Isocyanate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay (NCO content), purity by GC/HPLC, and impurity profiling, to ensure consistency and reliability. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15-25°C (59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture ingress and polymerization. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (NCO Content)	≥ 98.0 %
Purity (GC)	≥ 99.0 %
Color (APHA)	≤ 50
Water Content	≤ 0.05 %
Hydrolyzable Chloride	≤ 0.01 %

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