Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Covestro Desmophen RD181X Polyester Resin

Covestro Desmophen RD181X is a high-performance aliphatic polyester resin from the Desmophen® RD series, engineered for UV-curable coatings and inks. It delivers excellent weather resistance, low viscosity, and superior adhesion on plastics and metals. Ideal for industrial and decorative applications requiring gloss retention and chemical durability.
  • covestro desmophen rd181x polyester resin_a5f23ec2
  • covestro desmophen rd181x polyester resin_a5f23ec2

Features Of Covestro Desmophen RD181X Polyester Resin

  1. High molecular weight aliphatic polyester resin offering excellent flexibility and impact resistance.

  2. Low viscosity enables easy processing and improved formulation compatibility with isocyanates and other crosslinkers.

  3. Hydrolysis-resistant structure ensures enhanced durability in humid or outdoor exposure conditions.

  4. Designed for 2K polyurethane coatings requiring balanced hardness, elasticity, and weathering performance.

  5. Free of aromatic monomers — supports low-yellowing and superior UV stability in clear and pigmented systems.

Typical Applications Of Covestro Desmophen RD181X Polyester Resin

  1. Automotive refinish clearcoats and basecoats requiring high gloss and chip resistance.

  2. Industrial maintenance coatings for metal substrates exposed to harsh environmental conditions.

  3. High-performance wood coatings where flexibility and adhesion to complex contours are critical.

  4. Plastic coatings for automotive interior trim and consumer electronics housings.

  5. UV-curable hybrid polyurethane-polyester topcoats for decorative and protective finishes.

Specifications Of Covestro Desmophen RD181X Polyester Resin

Chemical TypeAliphatic polyester polyol
Product FormLiquid
AppearanceClear, pale yellow liquid
Hydroxyl Value (mg KOH/g)50–56
Acid Value (mg KOH/g)< 2.0
Viscosity at 25°C (mPa·s)3,500–4,500
Water Content (wt. %)< 0.10
Primary Applications2K polyurethane topcoats for automotive, industrial, and wood applications


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