Bayer MaterialScience NAFTA - Products - Bayhydur® hydrophilic polyisocyanates



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Bayhydur^® is a hydrophilically-modified polyisocyanate hardener for waterborne two-component (2K) polyurethane (PUR) systems. Applications for Bayhydur products include adhesives, automotive coatings, parquet coatings, OEM primer surfacers, plastics coatings, industrial coatings, glass coatings, can coatings, coil coatings and pigmented coatings. Bayhydur water-dispersible polyisocyanates include aliphatic and blocked isocyanate grades.

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

To find links to more information about the benefits and uses of Bayhydur products with polyurethane dispersions, visit the Bayer Polyurethane Dispersions Center.

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13 Product Grade(s):

= data sheet(s)

= other literature

BAYHYDUR 302

water-dispersible polyisocyanate based on hexamethylene diisocyanate (HDI); hardener in waterborne 2K-PUR systems for adhesives and automotive refinish, plastics and industrial coatings; outstanding weather stability and gloss retention, non-yellowing; NCO content 17.3% ± 0.5; solids 99.8% minimum; viscosity 2,300 ± 700 mPa·s @ 25°C

BAYHYDUR 303

water-dispersible polyisocyanate based on hexamethylene diisocyanate (HDI); hardener in waterborne 2K-PUR systems; NCO content 19.3% ± 0.5; viscosity 2,400 ± 800 mPa·s @ 25°C

BAYHYDUR 304

(formerly Bayhydur VP LS 2319) aliphatic water-dispersible polyisocyanate based on hexamethylene diisocyanate (HDI); hardener in waterborne 2K-PUR systems for automotive refinish, plastics and industrial coatings;high functionality, good chemical resistance, good dispersibility, weather stable, non-yellowing; NCO content 18.0% ± 0.5; solids 100%; viscosity 4,500 ± 1,500 mPa·s @ 23°C

BAYHYDUR 305

(formerly Bayhydur VP LS 2336) aliphatic water-dispersible polyisocyanate based on hexamethylene diisocyanate (HDI); hardener in waterborne 2K-PUR systems for wood and furniture, industrial coatings; good dispersibility, weather stable, non-yellowing, increased flexibility; NCO content 16.2%; solids 100%; viscosity 6,800 mPa·s @ 23°C

BAYHYDUR 401-70

(formerly Bayhydur VP LS 2150/1) water-dispersible polyisocyanate based on isophorone diisocyanate (IPDI); hardener in waterborne 2K-PUR systems for automotive refinish and industrial coatings;weather stable, non-yellowing, improved hardness, better drying properties; NCO content 9.4% ± 0.5; solids 70% ± 2; viscosity 600 ± 200 mPa·s @ 23°C

BAYHYDUR BL 5335

water-dispersed aliphatic polyisocyanate resin based on dicyclohexylmethane diisocyanate (H12MDI); used as hardener component for 1-K waterborne components; flow time 15-30 sec @23°C; non-volatile content 34-36%; pH value 4.5-6.0; blocked NCO content 2.5%; equivalent wt. avg. 1680 as supplied; specific gravity 1l.04 @25°C;

BAYHYDUR VP LS 2150 BA

water-dispersible polyisocyanate based on isophorone diisocyanate (IPDI); hardener in waterborne 2K-PUR systems; for improved properties in 2K coatings; NCO content 9.4% ± 0.5; solids 70% ± 2.0; viscosity 500 ± 200 mPa·s @ 23°C

BAYHYDUR VP LS 2240

blocked water-dispersible polyisocyanate based on dicyclohexylmethane diisocyanate (H₁₂MDI); waterborne 1K-PUR systems for industrial coatings applications, especially glass coatings; high flexibility, good adhesion, weather stable, good chemical resistance especially vs. alkali; blocked NCO content 2.5%; solids 35%; viscosity 20 sec @ 23°C

BAYHYDUR VP LS 2306

water-dispersible polyisocyanate based on hexamethylene diisocyanate (HDI); hardener in waterborne 2K-PUR systems; NCO content 8.0%; viscosity 7,500 mPa·s @ 23°C

BAYHYDUR VP LS 2310

water-dispersible blocked polyisocyanate based on hexamethylene diisocyanate (HDI); hardener for water-thinnable, lightfast, one-pack polyurethane stoving coatings; applications include automotive OEM systems and high quality stoving industrial coatings; solids 36.5 - 38.5%; viscosity 3,000 - 10,000 mPa·s @ 23°C


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		aliphatic grades available
		blocked grades available

		Data Sheets
		Product Literature
		Technical Papers