Thermal insulation board comprising at least one aerogel composite material for the thermal insulation of buildings

A thermal insulation board (IB) comprising at least two insulating layers (A), wherein the at least two insulating layers (A) are bonded together and wherein at least one of the at least two insulating layers (A) comprises at least one aerogel composite material comprising:

• (a1) a plurality of a silica aerogel particles,
• (a2) at least one polymer foam comprising an open-cell polymer foam, and
• (a3) at least one flame retardant embedded in the silica aerogel particles,
• wherein the at least one aerogel composite material comprised in at least one of the at least two insulating layers (A) comprises
• 20 to 80% by weight of the silica aerogel (a1),
• 1 to 15% by weight of the at least one polymer foam (a2) and
• 27 to 60% by weight of the at least one flame retardant (a3),
• based in each case on a total weight of the at least one aerogel composite material and
• wherein the thermal insulation board is characterized by thermal properties that include a furnace temperature rise less than 50° C., a mass loss of less than 50% and a flame time of less than 20 s determined according to ISO 1182:2010,
• wherein the at least one aerogel composite material has a heat of combustion of less than or equal to 3.0 MJ/kg, determined according to EN ISO 1716:2010-11, and has a liquid water uptake of less than or equal to 20% by weight, based on the total weight of the at least one aerogel composite material.