Near infrared absorbing acrylic construction blocks

摘要

Acrylic construction blocks in which the faces absorb infrared radiation and transmit visible radiation are disclosed. The faces each comprise an effective amount of an infrared absorber that comprises an infrared absorbing phthalocyanine compound. The blocks may be used in applications in which it is desirable to filter out the infrared radiation passing through the acrylic blocks without materially diminishing the transmission of visible radiation.