POLYURETHANE FOAM WITH LOW CONTENT OF MONOMERS Russian patent published in 2014 - IPC C08L75/04 C08G18/10 C08G18/12 C08G18/42 C08G18/48 C08G18/76 C08J9/14 C08L71/02 

FIELD: chemistry.

SUBSTANCE: invention relates to single-component polyurethane foam with low content of monomers, suitable to encapsulation, isolation and/or mounting of junctions, surfaces of roof, windows and doors or for filling cavities. Composition contains a) from 10 to 90 wt % of prepolymers from polyesterdiols, obtained by reaction with excess of diisocyanate with the following removal of excess monomer diisocyanate, b) from 90 to 10 wt % of component based on polyether polyols, which have either, at least, one Si(OR)₃-group, where -OR radical is selected from methoxy-, ethoxy-, propoxy, butoxy-radicals, or, at least, one NCO-group, c) from 0.1 to 30 wt % of additives, d) at least, one foaming agent. Both polyesterdiols and polyetherdiols have molecular weight (M_N) less than 5000 g/mol, and mixture from a and b has content of monomer diisocyanate less than 2 wt %. Invention also relates to method of claimed composition obtaining and application of composition for obtaining linkable foams in container.

EFFECT: obtained linked foams have good mechanical properties.

22 cl, 2 tbl, 25 ex