STABLE EMULSIONS AND THEIR USE IN THE PRODUCTION OF FOAMS BASED ON ISOCYANATE
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Abstract
The invention relates to stable emulsions for the production of foams based on isocyanate, at least comprising three polyols A1a, A1b and A1c as well as at least one physical blowing agent T, wherein A1a is a polyether polyol obtained by addition of epoxides to starter compounds selected from carbohydrates and di- or higher-functional alcohols, A1b is a polyether polyol started on an aromatic amine, and A1c is a polyester polyol obtained by esterification of a polycarboxylic acid component and a polyalcohol component, wherein the total amount of aromatic dicarboxylic acid derivatives used in the esterification, calculated on the basis of the free aromatic dicarboxylic acids and based on the total mass of polyalcohol component and polycarboxylic acid component, is less than or equal to 48.5% by mass.
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Citations
34 Claims
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1-17. -17. (canceled)
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18. An emulsion comprising
(I) an isocyanate-reactive composition A comprising a polyol mixture A1 of at least three polyols A1a, A1b and A1e as the continuous phase and (II) at least one physical blowing agent T as the disperse phase, wherein: -
A1a is a polyether polyol having a hydroxyl number of from 15 mg KOH/g to 550 mg KOH/g and having a functionality of from 1.5 to 6.0, obtained by addition of an epoxide to one or more starter compound(s) selected from the group consisting of carbohydrates and di- or higher-functional alcohols; (ii) A1b is a polyether polyol having a hydroxyl number of from 100 mg KOH/g to 550 mg KOH/g and having a functionality of from 1.5 to 5.0, obtained by addition of an epoxide to an aromatic amine; (iii) A1e is a polyester polyol having a hydroxyl number of from 100 mg KOH/g to 450 mg KOH/g and having a functionality of from 1.5 to 3.5, obtained by esterification of a polycarboxylic acid component and a polyalcohol component, wherein the total content of aromatic dicarboxylic acid derivatives used in the esterification, calculated on the basis of the free aromatic dicarboxylic acids. is less than or equal to 48.5% by mass, based on the total mass of polyalcohol component and polycarboxylic acid component. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification