METHOD FOR PREPARING POLYURETHANE MATERIAL Russian patent published in 2006 - IPC C08G18/48 C08G18/66 C08G18/76 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing polyurethane material, and to material made of in relation with the indicated method. Invention describes a method for preparing polyurethane material showing the vitrification point 25°C, not below. Polymer is prepared by interaction of polyisocyanate component consisting of the following components: a) 80-100 wt.-% of diphenylmethane diisocyanate comprising 4,4'-diphenylmethane diisocyanate and/or variant of indicated diphenylmethane diisocyanate, 40 wt.-%, not less, and 0-20 wt.-% of another polyisocyanate with the isocyanate-reaction composition consisting of the following components: a) 80-100 wt.-% of simple polyetherpolyol with the average nominal polyfunctionality 3-8, average equivalent mass 200-2000 Da, average molecular mass 600-8000 Da, the oxyethylene content 50-100% and the content of primary hydroxyl groups 70-100%; b) reaction elongating agent and/or cross-linking agent taken in the amount wherein the ratio of hardness blocks = 0.60; and c) 0-20 wt.-% of one or some other isocyanate-reaction compounds but excluding water, and material made of the indicated method. Polyurethanes made of the proposed method show density value 957 kg/m³, the Shore hardness value 77 and the virtification temperature 87°C that can be used in making show footings, arm rests, door panels an car sun glass baffle plates.

EFFECT: improved preparing method.

5 cl, 1 tbl, 2 ex