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Packaging Size: 5 g

WPBG-300 is an ionic photo base generator which can be used for a variety of applications.... more

Product information

WPBG-300 is an ionic photo base generator which can be used for a variety of applications. It shows a high preservation stability in the monomer and indicates a photosensitivity in the long wavelength region by using various sensitizers together.

In photo polymerization processes such as UV and near UV photocure, WPBG products are not subject to inhibition by the oxygen in the air like photo radical generators. They are less likely to cause corrosion problems and the denaturation of cured films like photo acid generators.

The photo generators of the WPBG series generate bases of various basicity, which provide different curing speed and photo-sensitivity. Various grades of WPBG products from high quality, high purity (HP) to general-purpose grades are available.

Chemical Name

1,2-Dicyclohexyl-4,4,5,5-tetramethylbiguanidium n-butyltriphenylborate

CAS No.: 1801263-71-7

Molecular weight: 621.75

Physical characteristics

Appearance White powder
Melting/freezing point 115° C

Freely soluble in acetone and 1-methyl-2-pyrrolidone
Soluble in methanol and PGMEA (1-methoxy-2-propyl acetate)
Slightly soluble in water

Main Applications

  • Photo curable coatings and resin glazing
  • Adhesives and optical encapsulates
  • Solder resist


Store below 25° C in a well ventilated space. Keep only in original container and protect against external exposure such as heat, humidity, UV-radiation.

Keep away from heat, hot surfaces, sparks, open flames and other ignition sources and take precautionary measures against static discharge. 

For specific information on the safe handling of the product, please refer to the material safety data sheet (MSDS) which is available on request.


For more information and the latest publications please visit the Mediacenter.

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