Soft Feel Water based Polyurethane Resin For Wood

Sri Resin S-900 is water based polyurethane resin that offers unique “Soft / Silky / Velvet” feel with a very low gloss. Sri Resin S-900 can be used over wood, metal and other hard substrates to get unique soft feel / soft touch effect with good water resistance. Sri Resin S-900 along with soft feel gives excellent water and good house hold chemical resistance. Sri Resin S-900 when crosslinked with polyaziridine crosslinker, gives excellent chemical properties and adhesion.

Key Benefits 

• “Silky /Soft/ Velvet feel” Properties
• Very Low Gloss = less than 7@ 60°
• Excellent water resistance
• Good scrub resistance
• Easy clean – just a wipe away to remove tough stains (like ink, coffee and other common household stains)
• Good common house hold chemical resistance

Applications: Wood and other hard substrate coatings

• As an top coat which gives a nice soft/ silky feel, low gloss on the substrate
• Has Silky/Soft feel with required chemical and abrasion resistance properties after crosslinking
• Crosslink with polyfunctional aziridine crosslinker or water dispersible polyisocyanate crosslinker for better properties
• Easily formulated to get required color with water based colorants

Typical Properties

• Aliphatic Polyurethane Dispersion
• Appearance = Milky white liquid
• Solids, by weight = 30%
• pH (@25°C) = 7 to 9
• Viscosity, Brookfield, CPS@ 25°C = Less than 3000 cps
• Weight kg/l , 25°C =1.05 kg/liter
• Specific gravity of solids, 25°C = 1.05
• Shelf life 9 months

Guidelines:

• Might notice some soft settling while storage, mix well before use
• If you notice poor film formation or micro cracks due to lack of co-solvent add 2 to 5% co-solvents suggested below:
  • Dipropylne Glycol Methyl Ether (DPM)
  • Dipropylne Glycol nButyl Ether (DPnB)
  • N-Methylpyrrolidine (NMP)
  • Butyl Cellosolve

Defoamers, Wetting and flow aids:

• To reduce processing foam the common defoamers like Tego Foamex 805 or 830 (from Evonik) or BYK 024 or BYK 025 or other equivalents can be used. The wetting and flow aids like BYK 346 or BYK 348 or other equivalents will help in wetting and flow

Crosslinker:

• For crosslinking use 1.5 to 3 % of polyaziridine crosslinkers or water dispersible isocyanates (Bayhydur 302 or equivalents)

Thickeners:

• To increase the viscosity, we recommend use of urethane associative thickeners or other non-ionic thickeners

Caution:

• Sri Resin S-900 might show some soft settling on standing / storage and should always be mixed before use
• Proper drying / curing after crosslinking with crosslinker is important to get the required adhesion on the substrate

Note: Sri Resin S-900 is available in co-solvent free versions also.