TMXDI1 (META) Aliphatic Isocyanate Application Areas for Technology Goal:Provide information on the performance benefits, chemistry, and processing advantages of TMXDI monomer for water-bad coating technology as it
applies to polyurethane dispersions
Opportunities:Provide an isocyanate with significant health and safety benefits
Provide a coating technology that allows for the preparation of solvent-free
waterborne polyurethane dispersions
Develop TMXDI monomer bad polyurethane coatings with a broad range
of hardness and performance properties
干炸响铃
Aqueous Dispersions UV Curable
Adhesives Floor Coatings
阴阳不调
Specialty Coatings Flexible Coatings
Roof Coatings Plastic Coatings
Floor Coatings
Flexible Coatings
Plastic Coatings
T wo-Component Lacquers
Adhesives Flexible Coatings
Specialty Coatings
Roof Coatings
Floor Coatings
Flexible Coatings
Plastic Coatings
Sealants
RIM
Potting/Encapsulation
One Shot Moisture Cure
Castable Elastomers Roof Coatings
Adhesives Floor Coatings
Sealants Specialty Coatings
Sealants
起酥油的危害
1As ud herein, all references to TMXDI are understood to be TMXDI(META) aliphatic isocyanate
TMXDI (META) Aliphatic Isocyanate for Dispersions Why u TMXDI monomer over other isocyanates?
• TMXDI is uniquely suited for waterborne application
• Manufacturing Advantages
– Processing ea due to low prepolymer viscosity
– Solvent free, no acetone or NMP
– Higher through-puts
• Performance Advantages
– Broad range of properties obtainable
– Flexible coatings with superior adhesion
马桶堵住了怎么办
– Exceptional toughness
– Improved aluminum flake orientation
著名的诗句• Improved Industrial Hygiene
– Not a pulmonary nsitizer
• FDA Sanction for u in food packaging adhesives under 21CFR 175.105, Non Food Contact
3
NCO
TMXDI (META)
Aliphatic Isocyanate H 3C 3
META-Tetramethylxylylene Diisocyanate
Physical Properties
Molecular Formula C 14H 16N 2O 2 Molecular Weight 244.3 NCO Content, % By Weight 34.4 Equivalent Weight 122.1 Boiling Point, °C mmHg 150(3 mmHg) Melting Point, °C -10 Vapor Pressure, mmHg @ 25°C 0.003 Flash Point, °C (Setaflash Clod Cup) 153 Autoignition Point, °C 450
Solubility Inert organic solvents
TMXDI (META) Aliphatic Isocyanate Chemistry Characteristics
Polyurethanes Intermediates (Prepolymers) NCO Terminated Prepolymers • Aliphatic isocyanate becau the NCO is not conjugated to the aromatic ring
– Excellent light stability and exterior durability
• Steric hindrance by dimethyl groups lower reactivity and reduce hydrogen bonding – Lower reactivit
y with water
– Controlled reactivity by u of catalysts
– No lf-condensation reactions leading to branching, e.g. allophanate, biuret,
isocyanurate
– Minimal reactivity with carboxyl groups
– Significantly lower prepolymer viscosity
你是我最美的缘• Equal isocyanate reactivity
• Higher reaction temperatures possible for prepolymer formation
– 100°C-120°C not a problem爱好怎么写
– Stable viscosity in abnce of water
• Almost all polyurethane-polyureas are prepared via NCO prepolymer intermediates • The possibility to tailor-make any desirable intermediate by the polyaddition reaction is an important attribute
饱读诗书
• The are prepared by the reaction of di- or polyhydroxyl compounds with an excess of diisocyanates
– Typical molecular weight 7,000 - 12,000
• Further reaction with difunctional chain extenders gives ri to the fully reacted high molecular weight polyurethane-polyurea network
