STABLE IN STORAGE POLYOL COMPOSITIONS FOR OBTAINING RIGID POLYISOCYANURATE FOAM Russian patent published in 2014 - IPC C08G18/40 C08G18/42 C08G18/54 

FIELD: chemistry.

SUBSTANCE: invention relates to a stable in storage polyol composition, to a composition for obtaining polyisocyanurate foam and to a method of obtaining the polyisocyanurate foam. The polyol composition includes the following components: aliphatic polyesterpolyol, which has a hydroxyl number lower than 100, aromatic polyesterpolyol, polyetherpolyol of a novolac type, and a fluorohydrocarbon foaming agent. Applied aliphatic polyesterpolyol is obtained by a reaction of, at least, polycarboxylic acid with polyhydroxycompound. The polyol composition does not demonstrate phase separation, determined by visual inspection without an increase for a period of, at least, 60 days under environmental conditions. The said composition can be brought into a reaction with polyisocyanate with a value of an isocyanate index from 2.5 to 4 with the formation of the rigid polyisocyanurate foam.

EFFECT: invention makes it possible to obtain the foam with improved cohesion, improved adhesion and reduced frequency of void occurrence when applied on a metal substrate.

19 cl, 3 tbl, 7 ex