Novel castor oil-based polyol emulsions

Abstract

A polyol emulsion of castor oil and monoepoxides is combined with methylenediphenyl diisocyanate (MDI) and cement to produce a polymer cement.

1 . An emulsion comprising:
 a) from 25 to 45 parts by weight of water,   b) from 45 to 69.5 parts by weight of castor oil,   c) from 5 to 30 parts by weight of monoepoxide and   d) from 0.5 to 5 parts by weight of auxiliaries and additives.   
   
   
       2 . The emulsion of  claim 1  in which c) is a compound represented by the formula (I) 
     
       
         
         
             
             
         
       
       in which R represents a C 8  to C 16 -alkyl radical. 
     
   
   
       3 . The emulsion of  claim 2  in which d) comprises a nonionic emulsifier based on a sorbitan ester, mineral oil or hydroxyethylcellulose. 
   
   
       4 . The emulsion of  claim 1  in which d) comprises a nonionic emulsifier based on a sorbitan ester, mineral oil or hydroxyethylcellulose. 
   
   
       5 . The emulsion of  claim 1  having a viscosity of from 90 to 300 mPa·s at 23° C. 
   
   
       6 . The emulsion of  claim 2  having a viscosity of from 90 to 300 mPa·s at 23° C. 
   
   
       7 . The emulsion of  claim 3  having a viscosity of from 90 to 300 mPa·s at 23° C. 
   
   
       8 . A polymer cement comprising:
 (1) from 10 to 25 parts by weight of the emulsion of  claim 1 ,   (2) from 10 to 40 parts by weight of MDI (methylenediphenyl diisocyanate) and   (3) from 35 to 80 parts by weight of cement.   
   
   
       9 . The polymer cement of  claim 8  in which (2) is a mixture of from 30 to 85% by weight of MDI isomers having two aromatic 6-membered rings per molecule and from 15 to 70% by weight of higher molecular weight MDI homologs containing three or more aromatic 6-membered rings per molecule. 
   
   
       10 . The polymer cement of  claim 9  in which the cement contains at least 23% by weight of CaO and from 1 to 10% by weight of calcium hydroxide. 
   
   
       11 . The polymer cement of  claim 8  in which the cement contains at least 23% by weight of CaO and from 1 to 10% by weight of calcium hydroxide. 
   
   
       12 . A molded article produced from the polymer cement of  claim 8 .