| 摘要 |
Stable polyol dispersions for polyurethane mouldings contain ester-type release agents (c1) derived from (1) 10-40C fatty acid(s), (2) optionally di- or poly-carboxylic acid(s) and (3) a polyether-polyol component with ethylene oxide and/or propylene oxide units, showing an OH number of 200-1000 (preferably 400-800) and a functionality of 2-6, preferably 2-4. Stable dispersions of polyol formulations (I) for polyurethane mouldings, comprising (a) polyether-polyol(s) with an OH number of 350-1830 mg KOH/g and a functionality of 2-8, optionally containing up to 40 wt.% (based on a and b) polyester-polyols with an OH number of 250-500 and a functionality of 2-3, (b) optionally polyether-polyols with an OH number of 15-250 and a functionality of 2-6, (c1) ester group-containing release agent(s), (c2) amide group-containing release agent(s), (d) water or water and physical blowing agents, (e) activators, (f) stabilizers and (g) other additives etc. (components c2 to g are all optional). Release agents (c1) are derived from (1) 10-40C fatty acid(s), (2) optionally di- or poly-carboxylic acid(s) and (3) polyether-polyol component(s) with ethylene oxide (EO) and/or propylene oxide (PO) groups, showing an OH number of 200-1000 (preferably 400-800) and a functionality of 2-6, preferably 2-4, up to 50 equiv% of which may be replaced by other polyols without EO or PO units. Independent claims are also included for: (1) a method for the production of (I) by mixing the components (a-g) together; (2) cellular polyurethane mouldings obtained by reacting polyisocyanates with (I); and (3) a method as described above for the production of cellular polyurethane mouldings.
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