Aqueous aromatic polyurethane elastomeric articles and method of fabricating the same

Abstract

An aqueous aromatic polyurethane elastomeric article is fabricated by an aqueous aromatic polyurethane dispersion, prepared by polyurethane prepolymers comprising wholly aromatic diisocyanates, especially toluene diisocyanate (TDI). And, a method of fabricating the elastomeric article is provided.

1 . An aqueous aromatic polyurethane elastomeric article fabricated by an aqueous aromatic polyurethane dispersion, prepared by polyurethane prepolymers comprising wholly aromatic diisocyanates.  
   
   
       2 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the aromatic diisocyanate is toluene diisocyanate (TDI).  
   
   
       3 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the aqueous aromatic polyurethane dispersion is prepared by an aromatic diisocyanate, at least one polyol, a low-molecular weight compound with at least two functional groups capable of reacting with isocyanate groups, and a hydrophilic compound containing active hydrogen.  
   
   
       4 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has a thickness of 0.05˜0.35 mm.  
   
   
       5 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has an elongation of 150˜1000%.  
   
   
       6 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has an elongation exceeding 650%.  
   
   
       7 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has a tensile strength of 30˜850 kg/cm 2 .  
   
   
       8 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has a tensile strength exceeding 170 kg/cm 2 .  
   
   
       9 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has a 500% modulus of 10˜150 kg/cm 2 .  
   
   
       10 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article has a 500% modulus less than 70 kg/cm 2 .  
   
   
       11 . The aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , wherein the elastomeric article comprises a glove, condom, or catheter.  
   
   
       12 . A method of fabricating an aqueous aromatic polyurethane elastomeric article as claimed in  claim 1 , comprising: 
 providing an aqueous aromatic polyurethane solution;    dipping a mold in the solution;    forming an aqueous aromatic polyurethane film on the mold surface after the mold is lift out of the solution;    drying and cooling the film; and    stripping the film and forming an aqueous aromatic polyurethane elastomeric article.    
   
   
       13 . The method as claimed in  claim 12 , wherein the aqueous aromatic polyurethane solution is prepared by the following steps, comprising: 
 mixing aromatic diisocyanate, polyol, hydrophilic groups-containing diol, and solvent to form a solution comprising aromatic polyurethane prepolymers;    dispersing the prepolymers in an aqueous phase of the solution and extending the chain thereof; and    forming the aqueous aromatic polyurethane solution after the solvent content is reduced by distillation.    
   
   
       14 . The method as claimed in  claim 12 , wherein the aqueous aromatic polyurethane solution comprises surfactant, thickener, humectant, stabilizing reagent, deforming agent, cross-linking agent, leveling agent, or plasticizer.  
   
   
       15 . The method as claimed in  claim 12 , wherein the mold is ceramic, metal, plastic, or rubber.