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K-FLEX® A307 is a low viscosity, 100% solids linear, saturated, aliphatic polyester diol. This product is designed as a flexibility modifier for acrylic/isocyanate and acrylic/melamine systems.

Chemical Family: Polyols

Hydroxyl Value: 140.0 - 140.0 mg KOH/g

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Base Chemicals Features
Advantages
  • Improved flexibility
  • Good balance of surface dry/pot life in 2K PU
  • Low isocyanate demand
  • Light color
  • Abrasion resistance
  • No acid functionality

Applications & Uses

Compatible Substrates & Surfaces
Base Chemicals End Uses
Use Level
5 - 25% (replacement of primary backbone resin)
Applications
  • Automotive OEM
  • Automotive refinish
  • Aerospace
  • Industrial maintenance
  • Plastic coatings

Properties

Physical Form
Appearance
Clear, Viscous liquid
Typical Properties
ValueUnitsTest Method / Conditions
% Nonvolatile, (1hr at 110°C)97%
Viscosity (25°C)5400mPa.s
Hydroxyl Number140
Hydroxyl Equivalent Weight400
Acid Number0.1
Weight per Gallon (25°C)9.25lbs
Gardner Color1

Storage & Handling

Shelf Life
24 months
Storage/Shelf Life
  • Store in a cool, dry location.
  • Minimum of 24 months from date of manufacture, when stored in the original container at ambient conditions.