IMPRANIL® DL 1537

Impranil® DL 1537 is an anionic aliphatic polyester-polyurethane dispersion designed for formulating textile coatings in various applications. Here are the key details:

Characterization: It is an anionic aliphatic polyester-polyurethane dispersion.

Form Supplied: Impranil® DL 1537 is supplied as an aqueous dispersion with a solids content of approximately 60%, and it is solvent-free.

Specification:

• • Flow time at 23°C, 4 mm cup: 15 - 60 seconds
  • pH value: 7 ± 1
  • Non-volatile content: 57 - 61%

Special Properties:

• • Very good resistance to hydrolysis
  • Good adhesion
  • High solids content
  • Good stirring stability
  • Suitable for mechanical foaming
  • High lightfastness
  • Soft handle

Film Properties:

• • 100% modulus: 1.3 MPa
  • Tensile strength: 15 MPa (original), 10 MPa (after 14 days of hydrolysis)
  • Elongation at break: 1,200%
  • Lightfastness: 7 (on DIN EN ISO 105-B02 scale)
  • Volume swelling: Varies with different solvents, with ethyl acetate causing around 120% swelling and water causing around 10% swelling.

Storage: It should be stored in the original sealed Covestro container at a recommended temperature of 5 - 30°C, protected from frost, heat, and foreign material. Brief heating to a maximum of 50°C has no adverse effect on product properties.

Impranil® DL 1537 offers excellent resistance to hydrolysis, good adhesion, and high lightfastness, making it suitable for various textile coating applications.