ISOCYANATE TRIMERIZATION CATALYST FOR MAKING POLYISOCYANURATE COMPRISING FOAMS Russian patent published in 2019 - IPC C08G18/18 C08G18/22 C08G18/09 C08G18/16 C08G18/48 C08G18/42 C08G101/00 C08J9/14 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyisocyanurate-polyurethane-containing rigid foam material with high content of closed pores. Said method involves combining and mixing, with an isocyanate index, of at least 100 polyisocyanate composition (a), isocyanate-reactive composition (b), trimerisation catalyst composition (c) and optionally one or more additives (d). Trimerisation catalytic composition contains at least one compound selected from organic alkoxides of formula (RO^-)_xM^{+ x}, where R is an organic group which is selected from a hydrocarbyl group, where the hydrocarbyl groups have 1–4 carbon atoms, x is a number defined by the oxidation degree M, M is selected from an alkali metal ion, an alkali-earth metal ion, a transition metal ion such as Ti, or a quaternary ammonium ion.

EFFECT: said method enables to obtain polyisocyanurate-polyurethane-containing rigid foam material with high content of closed pores, having density of up to 100 kg/m³, heat conductivity from 20 to 30 mW/m⋅K and content of closed pores is more than 75 % in terms of total content of closed and open pores present in the material.

14 cl, 3 dwg, 2 tbl, 2 ex