| 摘要 |
FIELD: adhesives. SUBSTANCE: composition containing water-containing polyol component wit water content 0.25-2.0 wt % and polyisocyanate component based on diphenylmethane diisocyanate, is distinguished with that, as a water-containing component, it contains polyol component with up to three OH groups and OH index 300-600, the indicated components being taken in such proportion as to obtain isocyanate index within the range 120 to 250, preferably 140-170. It is also preferable the water-containing polyol component to be a mixture consisting of (in wt %): di- or trifunctional polyether with OH index 28-600 obtained by interaction of ethylenoxide and/or propyleneoxide with di- and triatomic alcohols, 60-90; hydroxyl-containing polyether with OH index 200-300, 0.01-15; glycol with mol.weight 62-200, 5-20; water, 1-2; and activator, 0.5-3.0. EFFECT: new composition proposed. |
