Solvent-free acrylate defoamer for epoxy and UV systems. It has excellent compatibility with all kinds of UV monomer like DPGDA and TPGDA, and also has good compatibility with UV polyester resin and UV polyurethane resin. It may cause a little incompatibility to UV epoxy resin, with larger amount of dosage. Its excellent air releasing and bubble breaking ability is especially suitable for UV roller coating, brush coating, UV screen inks, UV offset, and UV flexo. Outstanding compatibility, high safety for application, low cratering tendency and fast foam-braking ability. It can be added in different stages of coating production and also in coating application.