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Desmodur® polyisocyanates

Desmodur® polyisocyanates are raw materials for the formulation of a variety of polyurethane coatings, adhesives and sealants. Desmodur products are available in both aromatic and aliphatic (light-stable) grades, and based on diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI) chemistry.

Click the literature icon link literature link icon next to any Desmodur grade in the listing below or click here to find product indexes for Bayer's aliphatic and aromatic isocyanates. Tables in the indexes let you compare isocyanate products by their chemistry and typical properties at a glance. (registration required)

For material selection assistance, use our Contact form.



74 Product Grade(s):
Data Sheets = data sheet(s) Product Literature = other literature
  DESMODUR BL 1100/1
Data Sheets/Viscosity Data
Product Literature
  blocked aromatic polyisocyanate based on TDI; combined with cycloaliphatic diamines to formulate highly flexible, one-component stoving coatings, including those for application by dipping and curtain coating and adhesive elements  
  DESMODUR BL 3175A
Data Sheets/Viscosity Data
Product Literature
 

aliphatic blocked polyisocyanate based on hexamethylene diisocyanate (HDI); for light-stable, 1K baking systems with relatively low curing temperatures;blocked NCO content 11.1%; solids 75% ± 2; viscosity 3,000 ±  1,000 mPa­·s @ 25°C

 
  DESMODUR BL 3272 MPA
Data Sheets/Viscosity Data
Product Literature
  aliphatic blocked polyisocyanate based on hexamethylene diisocyanate (HDI); hardener for lightfast one-pack baking polyurethane coatings; can be used to formulate both primers and topcoats with a dry film thickness up to approx. 40 µm; blocked NCO content 10.2%; solids 72% ± 2; viscosity 2,400 ±  750 mPa­·s @ 23°C  
  DESMODUR BL 3370 MPA
Data Sheets/Viscosity Data
Product Literature
  aliphatic blocked polyisocyanate based on hexamethylene diisocyanate (HDI); light-stable one-component baking polyurethane coatings with relatively low curing temps; for industrial finishing of appliances, coil coating, can coating, and chip-resistant primer-surfacers and topcoats for automotive; blocked NCO content 8.9%; solids 70% ± 3; viscosity 3,500 ±  1,200 mPa­·s @ 23°C  
  DESMODUR BL 3475 BA/SN
Data Sheets/Viscosity Data
Product Literature
  aliphatic blocked polyisocyanate based on hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI); hardener for lightfast one-pack baking polyurethane coatings with a low baking temp; for high-quality industrial coatings, especially for cans and tubes; blocked NCO content 8.2%; solids 75% ± 2; viscosity 1,000 ±  300 mPa­·s @ 23°C  
  DESMODUR BL 4265 SN
Data Sheets/Viscosity Data
Product Literature
 

aliphatic blocked polyisocyanate based on isophorone diisocyanate (IPDI); for light-stable, 1K baking polyurethane coating systems with relatively low curing temperatures; blocked NCO content 8.1%; solids 65% ± 2; viscosity 11,000 ± 3,000 mPa­·s @ 23°C

 
  DESMODUR BL 5375
Data Sheets/Viscosity Data
Product Literature
  blocked aliphatic crosslinking stoving urethane resin based on HDMI and dissolvedin solvent naptha 100/1-methoxypropylacetate-2, 1:1; non-volatile content 75±2 @ 0.5g/60 min/60°C; hazen color value ≤150; viscosity 4000±1500 @ 23°C, mPa·s; blocked NCO content 8.9%; density 1.04 g/cm3 @20°C; 470 avg. equivalent wt. as supplied; flash point 48°C  
  DESMODUR DA-L
Data Sheets/Viscosity Data
Product Literature
 

hydrophylic aliphatic polyisocyanate adduct based on hexamethylene diisocyanate (HDI); solvent-free, water-dispersible crosslinking agent for aqueous polymeric dispersions; improves resistance of adhesive bonds to moisture, heat, plasticizers and many solvents; NCO content  20.0% ± 1.0; viscosity 3,400 ± 600 mPa­·s @ 23°C

 
  DESMODUR DN
Data Sheets/Viscosity Data
Product Literature
 

hydrophylic aliphatic polyisocyanate adduct based on hexamethylene diisocyanate (HDI); lower viscosity grade; solvent-free, water-dispersible crosslinking agent for aqueous polymeric dispersions; improves resistance of adhesive bonds to moisture, heat, plasticizers and many solvents; NCO content  21.8% ± 0.5; solids 100%; viscosity 1,250 ± 300 mPa­·s @ 23°C

 
  DESMODUR E-14
Data Sheets/Viscosity Data
Product Literature
 

aromatic polyisocyanate; solvent-free linear aromatic prepolymer based on toluene diisocyanate (TDI); for coatings and sealants; combinations with Desmodur E 22 yield highly flexible, water-resistant finishes and sprayable coatings; NCO content  3.1 – 3.5%; solids 100%; viscosity 5,600 - 8,000 mPa­·s @ 23°C

 
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Aromatic and aliphatic grades

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