Plastisols containing glycerol esters as plasticizers

Abstract

Plastisols and organosols are provided that include plasticizers that include mono-, di- and triesters of glycerol. The plasticizers are good solvators for polyvinyl chloride and impart low plastisol and organosol viscosities.

What is claimed is: 
     
         1 . A method for making a polymer composition, the method comprising;
 dispersing particles of organic polymer to form a polymer dispersion; and   blending glycerol ester with the polymer in an amount effective for plasticizing the polymer, wherein the glycerol ester is selected from the group consisting of mono-, di- and triesters of glycerol, and mixtures thereof, the glycerol esters having a general formula   
       
         
           
           
               
               
           
         
       
       wherein 0 to 2 X groups are hydroxyl and 1 to 3 X groups are 
       
         
           
           
               
               
           
         
       
       wherein R 1  is —(CH 2 ) n —CH 3 , where n is 0 to 5, 
       wherein all R 1  groups are identical, 
       and wherein if n is 0, then 1 to 2 X groups are hydroxyl. 
     
     
         2 . The method according to  claim 1  wherein R 1  includes from 3 to 6 carbon atoms. 
     
     
         3 . The method according to  claim 1  wherein the polymer composition includes from about 1 to about 70 parts by weight glycerol ester per 100 parts thermoplastic polymer. 
     
     
         4 . The method according to  claim 1  wherein the composition has a ratio of glycerol to carboxylic acid of about 1 to 2.5 to about 1 to 3.0. 
     
     
         5 . The method according to  claim 1  wherein the glycerol ester is glycerol tributyrate. 
     
     
         6 . The method according to  claim 1  wherein at least one additional plasticizer is blended with said composition, the at least one additional plasticizer selected from the group consisting of a) the reaction products of monofunctional alcohols with monofunctional acids aliphatic of aromatic monocarboxylic acids; b) the reaction of glycols or diols with monofunctional acids such as benzoic acid, and c) the reaction of at least one carboxylic acid selected from the group consisting of alkyl and aromatic dicarboxylic acids with at least one alcohol selected from the group consisting of monofunctional and polyfunctional alcohols and monomeric and oligomeric glycols. 
     
     
         7 . The method of  claim 1  wherein at least one additional plasticizer is blended with said composition, the at least one additional plasticizer selected from the group consisting of phthalates, terephthalates, citrates, sulphonamides, alkyl sulfonic acid esters, adipates, saturated low molecular weight polyesters, isobutyrates, and glutarates. 
     
     
         8 . The method of  claim 1  wherein the glycerol ester is a blend of from 1 to 70 parts by weight per 100 parts of said thermoplastic polymer of a first ester and from about 30 to about 100 parts by weight per 100 parts of said thermoplastic polymer of a second ester.