Bonding agents for plastisols containing dotp or dinch

Abstract

A bonding composition for adhering PVC to fabric is disclosed. The bonding composition contains isocyanurate and organophosphate at an organophosphate to isocyanurate weight ratio of 4:1 to 10:1.

We claim: 
     
         1 . A bonding composition for adhering polyvinyl chloride to fabric, comprising:
 (a) isocyanurate; and   (b) organophosphate,   wherein the weight ratio of organophosphate to isocyanurate ranges from 4:1 to 10:1.   
     
     
         2 . The bonding composition according to  claim 1 , wherein the isocyanurate comprises aromatic diisocyanate groups. 
     
     
         3 . The bonding composition according to  claim 1 , wherein the isocyanurate comprises 2,4-toluene diisocyanate trimer. 
     
     
         4 . The bonding composition according to  claim 1 , which comprises 8 to 20% by weight of the isocyanurate, based on the total weight of the bonding composition. 
     
     
         5 . The bonding composition according to  claim 1 , wherein the organophosphate comprises alkyl or aryl groups having 7 to 10 carbon atoms. 
     
     
         6 . The bonding composition according to  claim 1 , wherein the organophosphate comprises tri-ethylhexyl phosphate, tricresyl phosphate, isodecyl diphenyl phosphate, 2-ethylhexyl diphenyl phosphate, or mixtures thereof. 
     
     
         7 . The bonding composition according to  claim 1 , wherein the organophosphate comprises tri-ethylhexyl phosphate. 
     
     
         8 . The bonding composition according to  claim 1 , which comprises 85 to 90% by weight of organophosphate, based on the total weight of the bonding composition. 
     
     
         9 . The bonding composition according to  claim 1 , wherein the weight ratio of organophosphate to isocyanurate ranges from 7:1 to 9:1. 
     
     
         10 . A coating composition comprising:
 (a) a plastisol comprising polyvinyl chloride (PVC) powder dispersed in a plasticizer comprising dioctyl terephthalate or 1,2-cyclohexane dicarboxylic acid diisononyl ester; and   (b) the bonding composition according to  claim 1 .   
     
     
         11 . The coating composition according to  claim 10 , wherein the plastisol further comprises vinyl copolymers. 
     
     
         12 . The coating composition according to  claim 10 , which comprises 4 to 15% by weight of the bonding composition, based on the total weight of the coating composition. 
     
     
         13 . The coating composition according to  claim 10 , which comprises from 40 to 120 parts by weight of plasticizer per 100 parts of PVC particles. 
     
     
         14 . The coating composition according to  claim 10 , wherein the organophosphate comprises tri-ethylhexyl phosphate. 
     
     
         15 . The coating composition according to  claim 10 , which further comprises flame retardants, stabilizers, fillers, pigments, chlorinated hydrocarbons, secondary plasticizers, viscosity depressants, antioxidants, UV absorbers, biocides, or mixtures thereof. 
     
     
         16 . A process for coating a fabric, comprising:
 (a) combining the bonding composition according to  claim 1  with a plastisol comprising polyvinyl chloride powder dispersed in a plasticizer comprising dioctyl terephthalate or 1,2-cyclohexane dicarboxylic acid diisononyl ester; and   (b) coating at least one side of a fabric with the mixture from step (a).   
     
     
         17 . The process according to  claim 16 , wherein the plastisol further comprises vinyl copolymers. 
     
     
         18 . The process according to  claim 16 , wherein the fabric comprises polyester or polyamide. 
     
     
         19 . The process according to  claim 16 , which further comprises (c) exposing the coated fabric to elevated temperature to fuse the coating. 
     
     
         20 . An article of manufacture comprising a fabric coated with the coating composition according to  claim 10 .