Isocyanate - reactive benzoate adduct polyol for use in the prodcution of rigid foam

Abstract

A polyol solution containing one or a combination of a benzoate glycol adduct, a substituted benzoate glycol adduct, a napthenate glycol adduct, a substituted naphthenate glycol adduct, a toluate glycol adduct, or a substituted toluate glycol adduct, and a closed cell, rigid polymer foam formed as a reaction product of the polyol solution, which foam comprises the reaction product of a polyisocyanate and an isocyanate-reactive component in the presence of a catalyst and a hydrogen-containing blowing agent or mixture of hydrogen-containing blowing agents, wherein the isocyanate-reactive component comprises a mixture of a hydroxy terminated polyester and a polyester comprised of the benzoic acid glycol adduct, toluic acid glycol adduct, or napthoic acid glycol adduct Foams prepared from the mixture have superior thermal conductivity, lower flammability, and higher stability of the emulsified liquid reactants prior to polymerization.

We claim:  
     
         1 . A polyisocyanate reactive, hydrocarbon blowing agent compatible, polyol solution comprising: 
 at least one polyester polyol;    a compatibilizing additive or mixture of additives selected from the group including: a benzoate glycol adduct, a substituted benzoate glycol adduct, a napthenate glycol adduct, a substituted naphthenate glycol adduct; a toluate glycol adduct, and a substituted toluate glycol adduct; and, at least one hydrocarbon blowing agent.    
     
     
         2 . The polyol solution of  claim 1 , wherein the compatibilizing additive is reacted with the polyol.  
     
     
         3 . The polyol solution of  claim 1 , wherein the compatibilizing additive and polyol are unreacted.  
     
     
         4 . The polyol solution of  claim 1 , further comprising: a flame retardant additive.  
     
     
         5 . The polyol solution of  claim 1 , further comprising: 
 a surfactant.    
     
     
         6 . The polyol solution of  claim 1 , wherein said hydrocarbon blowing agent is selected from the group comprising: cyclopentane, isopentane, n-pentane, 2-chloropropane, 1,1,1,2-tetrafluoroethane (HFC- 134a), 1,1,1,3,3 -pentafluoropropane (HFC-245fa), and n-propylbromide, or mixtures thereof.  
     
     
         7 . The polyol solution of  claim 1 , wherein said glycol component of said adduct is selected from the group comprising: diethylene glycol, polyethylene glycol, 2-naphthol, and 2-methyl-1,3-propanediol.  
     
     
         8 . The polyol solution of  claim 1 , wherein the additive is selected from the group comprising: methyl p-toluate glycol adduct and napthalene carboxylic acid glycol adduct.  
     
     
         9 . A polyisocyanate based foam comprising the reaction product of at least one polyester polyol; 
 a compatibilizing additive or mixture of additives selected from the group including: a benzoate glycol adduct, a substituted benzoate glycol adduct, a napthenate glycol adduct, a substituted naphthenate glycol adduct, a toluate glycol adduct, and a substituted toluate glycol adduct; and, at least one hydrocarbon blowing agent.    
     
     
         10 . The polyisocyanate based foam of  claim 9 , wherein the compatibilizing additive is reacted with the polyol.  
     
     
         11 . The polyisocyanate based foam of  claim 9 , wherein the compatibilizing additive and polyol are unreacted.  
     
     
         12 . The polyisocyanate based foam of  claim 9 , wherein the reaction product further comprises: 
 a flame retardant additive.    
     
     
         13 . The polyisocyanate based foam of  claim 9 , wherein the reaction product further comprises: 
 a surfactant.    
     
     
         14 . The polyisocyanate based foam of  claim 9 , wherein the blowing agent is selected from the group comprising: cyclopentane, isopentane, n-pentane, 2-chloropropane, 1,1,1,2-tetrafluoroethane (HFC- 134a), 1,1,1,3,3 -pentafluoropropane (HFC-245fa), and n-propylbromide, or mixtures thereof.  
     
     
         15 . The polyisocyanate based foam of  claim 9 , wherein the glycol component is selected from the group comprising: diethylene glycol, polyethylene glycol, 2-naphthol, and MP diol ®.  
     
     
         16 . The polyisocyanate based foam of  claim 9 , wherein the additive is selected from the group comprising: methyl p-toluate glycol adduct and napthalene carboxylic acid glycol adduct.