Deuteron® MM 659 combines organic Deuteron® PMU powders (polymethyl urea) with inorganic matting agents in a synergistic blend. Specifically engineered as matting agents, they excel within radiation-curable systems. The appearance of this product is characterized by fine white powders, offering a specialized solution for achieving desired surface finishes in radiation-curable applications.

Chemical Family: Polymethyl Urea

Functions: Flattener

End Uses: Radiation Curable Coating, Solventborne Coating, Waterborne Coating

Labeling Claims: Biodegradable

Features: Blocking Resistance, Chemical Resistance, Excellent Scratch Resistance, Improved Mechanical Resistance, Matting, Polishing Resistance

Technical Data Sheet

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Identification & Functionality

Chemical Family
CASE Ingredients Functions

Features & Benefits

Labeling Claims
Product Highlights
  • Deuteron® MM 659 is synergistic com- pounds of organic duromeric PMU powders (Polymethyl urea) with inorganic matting agents. They are particu- larly suitable as matting agents for radiation-curable systems.
  • Deuteron® MM 659 is especially designed to show a high matting performance with low influence on the final coating viscosity – a key property in many 100 % UV curable systems.

Applications & Uses

Cure Method
Application and Dosage Information

Deuteron® MM matting agents can be used in almost all coating applications ranging from water borne and solvent borne to 100 % systems. They can be used as stand-alone additives or in combination with other ma- terials to further improve their properties.

The use of Deuteron® MM 659 an MM 669 especially improves the following properties:

  • Good matting effect
  • Low influence on viscosity
  • High mechanical and chemical resistance
  • High scratch resistance and resistance to polishing
  • Support of soft effects.
  • Temperature resistant up to over 200 °C, short- time up to over 300 °C
  • Pleasant touch feeling
  • Improved blocking resistance
  • Insoluble in solvents commonly used in coatings
  • Polymer content biodegradable


  • Typical addition range: 100 % UV curable: 1 %–12 % w/b or s/b UV: 1 %–10 %
  • The required dosage level highly depends on the system (e.g. binder type, additives, solvent content) and appli- cation parameters. Thus, it is highly recommended to determine the needed addition level by a practical ladder study.


The PMU chemistry in general is highly compatible in a wide range of systems. Due to that Deuteron® MM mat- ting agents can be incorporated easily by a high-speed stirrer without the need for specific wetting agents or dispersing aids. They are shear stable in high shear pro- cesses but should not be ground in a bead mill.


Physical Form
Fine white powder
Typical Properties
ValueUnitsTest Method / Conditions
Densityapprox. 1.6g/cm³-
Particle Size (dv 50)approx. 7.4μm-
Particle Size (dv 90)approx. 17.1μm-
ValueUnitsTest Method / Conditions
Oil Absorption (Palatinol N)approx. 238g/100gDIN ISO 787/5

Packaging & Availability

Packaging Type
Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information
  • Paper bag (10 kg net)

Storage & Handling

Shelf Life
24 months
Storage and Shelf Life Conditions
  • 24 months at room temperature and dry conditions.
  • Storage temperature should not exceed 35 °C.