Storage stable polyurethane compositions

An organic polyurethane composition having a solids content of about 50 to 90 weight percent which comprises

• (1) isocyanate-terminated polyurethanes which are prepared by reacting
• (a) reaction products of the phosgenation of aniline-formaldehyde condensates containing, based on the total weight of component (a),
• (i) about 0 to 5 weight percent of 2,2'-diphenylmethane diisocyanate,
• (ii) about 15 to 30 weight percent of 2,4'-diphenylmethane diisocyanate,
• (iii) about 35 to 50 weight percent of 4,4'-diphenylmethane diisocyanate and
• (iv) about 30 to 45 weight percent of polymeric isocyanates having 3 or more isocyanate groups;
• with
• (b) a polyol component comprising
• (i) a polyether polyol with an average molecular weight of about 1,000 to 5,000 and which contains at least two hydroxyl groups and at least one tertiary nitrogen atom and which has at least 10 ether groups between the tertiary nitrogen atom and the hydroxyl groups, and optionally,
• (ii) an additional polyol with an average molecular weight of about 1,000 to 5,000 and which contains at least two hydroxyl groups and does not contain a tertiary nitrogen atom,
• wherein the polyol component (b) contains about 40 to 60 weight percent of component (i) and about 40 to 60 weight percent of component (ii) and wherein the quantities of (a) and (b) are chosen to provide component (1) with an isocyanate content of about 10 to 20 weight percent based on the total weight of component (1) and a viscosity of about 4,000 to 5,500 cps;
• and
• (2) a liquid monoisocyanate comprising a member selected from the group consisting of para-toluenesulfonyl isocyanate and the reaction product of 2,4-toluene diisocyanate or 2,6-toluene diisocyanate with an alcohol of the formula R.sub.1 OH wherein R.sub.1 represents a hydrocarbon group having from 1-18 carbon atoms optionally interrupted by ether groups,
• wherein the weight ratio of component (1) to component (2) is about 20:1 to 2:1.

An organic polyurethane composition having a solids content of about 50 to 90 weight percent which comprises isocyanate-terminated polyurethanes which are prepared by reacting

• (a) reaction products of the phosgenation of aniline-formaldehyde condensates containing, based on the total weight of component (a),
• (i) about 0 to 5 weight percent of 2,2'-diphenylmethane diisocyanate,
• (ii) about 20 to 30 weight percent of 2,4'-diphenylmethane diisocyanate,
• (iii) about 35 to 50 weight percent of 4,4'-diphenylmethane diisocyanate and
• (iv) about 30 to 45 weight percent of polymeric isocyanates having 3 or more isocyanate groups;
• with
• (b) a polyol component comprising
• (i) a polyether polyol with an average molecular weight of about 1,000 to 5,000 and which contains at least two hydroxyl groups and at least one tertiary nitrogen atom and which has at least 10 ether groups between the tertiary nitrogen atom and the hydroxyl groups, and optionally
• (ii) an additional polyol with an average molecular weight of about 1,000 to 5,000 and which contains at least two hydroxyl groups and does not contain a tertiary nitrogen atom,
• wherein the polyol component (b) contains about 40 to 60 weight percent of component (i) and about 40 to 60 weight percent of component (ii) and wherein the quantities (a) and (b) are chosen to provide an isocyanate content of about 10 to 20 weight percent based on the total weight of components (a) and (b) and a viscosity of about 4,000 to 5,500 cps.