Pembayaran hanya melalui request quotation dan dilakukan setelah tim kami menghubungi Anda. Mohon cantumkan nomor WhatsApp aktif untuk konfirmasi pesanan & pembuatan invoice. Estimasi pengiriman 4-5 minggu setelah pembayaran.
Description
TCI D2051 4,4'-Diisocyanato-3,3'-dimethylbiphenyl is an aromatic diisocyanate monomer used in polymer research, particularly in the preparation of polyurethanes and polyureas. The molecule consists of a rigid biphenyl core carrying two isocyanate groups at the para positions and two methyl groups at the adjacent positions. Isocyanate groups are highly reactive toward hydroxyl and amino groups, which makes this material a key component in step-growth reactions that build polymer chains. In materials laboratories, monomers of this type are used to design elastomers, coatings, adhesives, and high-performance films.
The property that makes this monomer a preferred choice is the rigidity of its biphenyl core, which produces hard segments with a high degree of order along the polyurethane chain. A rigid and symmetrical hard segment promotes the formation of ordered domains through hydrogen bonding between urethane or urea groups, and this in turn influences the tensile strength, modulus, and thermal resistance of the resulting material. The methyl groups positioned near the isocyanate groups introduce mild steric hindrance, so reactivity is more controlled than that of unsubstituted aromatic diisocyanates, which helps regulate the reaction rate and the processability of the system.
In Indonesian laboratories, this monomer is typically handled in materials science and polymer chemistry groups working on structure–property relationships in segmented polyurethanes and polyureas. Because of the high reactivity of the isocyanate function, work is normally carried out under dry conditions using dried solvents and glassware, with weighing and transfer kept brief. It is commonly used at research and small formulation scale, where controlled hard-segment chemistry matters more than bulk throughput.
Laboratory Applications
- Polyurethane synthesis: the two para isocyanate groups react with polyols in step-growth polymerization, giving researchers a rigid aromatic hard segment for segmented elastomer architectures.
- Polyurea preparation: reaction with di- or polyamines forms urea linkages whose strong hydrogen bonding, reinforced by the rigid biphenyl core, yields ordered and mechanically robust domains.
- High-performance coating research: the rigid, symmetrical structure supports coatings that require high modulus and thermal resistance, while methyl substitution keeps the cure rate manageable.
- Adhesive formulation studies: isocyanate reactivity toward hydroxyl and amino groups allows chain extension and network formation, making it useful for evaluating structural adhesive systems.
- Polymer film development: ordered hard-segment domains formed through urethane or urea hydrogen bonding help researchers correlate chain regularity with tensile strength and film thermal behaviour.
Specifications
- Brand: TCI (Tokyo Chemical Industry)
- CAS number: 91-97-4
- Category: Materials Science > Polymer/Macromolecule Reagents > Monomers
- Chemical class: aromatic diisocyanate monomer with a biphenyl core, two para isocyanate groups, and two methyl substituents
- Pack sizes: available in standard TCI research-scale packaging; please confirm the currently listed pack size when ordering
- Storage note: keep tightly closed in a cool, dry place, protected from moisture
Handling and Storage
Store the container tightly closed in a cool, dry, well-ventilated area, away from moisture, alcohols, amines, and other reactive nucleophiles. Isocyanates react readily with water and atmospheric humidity, so use dry glassware, dried solvents, and an inert atmosphere where possible, and reseal the container promptly after use. Original supplier packaging or tightly sealed compatible glass containers are appropriate. Handle inside a fume hood, wear gloves, safety glasses, and a laboratory coat, and avoid inhalation of vapours or skin contact. Follow the manufacturer safety data sheet and local institutional waste procedures for disposal of residues and contaminated materials.
