Electrostatic dissipative polyester tpu and compositions thereof

Abstract

The present invention relates to an electrostatic dissipative thermoplastic polyurethane composition made by reacting (a) at least one polyester polyol intermediate with (b) at least one diisocyanate and (c) at least one chain extender. The polyester polyol intermediate, may be derived from at least one dialkylene glycol and at least one dicarboxylic acid, or an ester or anhydride thereof. The invention further provides for methods of making said thermoplastic polyurethane composition, polymer blends containing said thermoplastic and polymer articles made from said thermoplastic.

We claim: 
     
         1 - 15 . (canceled) 
     
     
         16 . A lithium-ion battery separator comprising a poly(dialkylene ester) thermoplastic polyurethane composition made by reacting (i) at least one poly(dialkylene ester) polyol intermediate with (ii) at least one diisocyanate and (iii) at least one chain extender;
 wherein (i), the polyester polyol intermediate, comprises an intermediate derived from at least one dialkylene glycol and at least one di-carboxylic acid, or an ester or anhydride thereof.   
     
     
         17 . The battery separator of  claim 16  wherein component (iii) the chain extender comprises hydroquinone bis (beta-hydroxyethyl) ether. 
     
     
         18 . The battery separator of  claim 16  wherein the di-carboxylic acid contains from 4 to 15 carbon atoms and the dialkylene glycol contains from 2 to 8 aliphatic carbon atoms. 
     
     
         19 . The battery separator of any of  claim 16  wherein (ii), the diisocyanate, comprises: 4,4′-methylenebis-(phenyl isocyanate); hexamethylene diisocyanate; 3,3′-dimethylbiphenyl-4,4′-diisocyanate; m-xylylene diisocyanate; phenylene-1,4-diisocyanate; naphthalene-1,5-diisocyanate; diphenylmethane-3,3′-dimethoxy-4,4′-diisocyanate; toluene diisocyanate; isophorone diisocyanate; 1,4-cyclohexyl diisocyanate; decane-1,10-diisocyanate; dicyclohexylmethane-4,4′-diisocyanate; or combinations thereof; and
 wherein (iii), the chain extender, comprises: hydroquinone bis (beta-hydroxyethyl) ether; ethylene glycol; diethylene glycol; propylene glycol; dipropylene glycol; 1,4-butanediol; 1,6-hexanediol; 1,3-butanediol; 1,5-pentanediol; neopentylglycol; or combinations thereof. 
 
     
     
         20 . The battery separator of  claim 16  wherein: (i), the polyester polyol intermediate, comprises poly(diethylene glycol adipate); (ii), the diisocyanate, comprises 4,4′-methylenebis-(phenyl isocyanate); and (iii), the chain extender, comprises butanediol, benzene glycol, or combinations thereof. 
     
     
         21 . The battery separator of  claim 16  further comprising an effective amount of a lithium containing salt. 
     
     
         22 . The battery separator of  claim 16  further comprising an organic solvent. 
     
     
         23 . The battery separator of  claim 16  wherein (a), the polyester polyol component, is substantially free of polyether polyols. 
     
     
         24 . The battery separator of  claim 16  further comprising at least one base polymer. 
     
     
         25 . The battery separator of  claim 24  wherein the base polymer comprises: a polyolefin; a styrenic resin; a thermoplastic polyurethane, a polyamide; an acrylic polymer; a polyvinylchloride; a polyvinylidene fluoride; a polyethylene oxide; an ethylene oxide-propylene oxide copolymer; a polyacrylonitrile; a polyoxymethylene; a polyester; a polycarbonate; a polyphenylene oxide; polyphenylene sulfide; or combinations thereof. 
     
     
         26 . The battery separator of  claim 16  further comprising at least one additional additive, comprising a plasticizer, a lubricant, an antioxidant, a heat stabilizer, hydrolytic stabilizer, an acid scavenger, mineral and/or inert filler, a nano filler, or any combination thereof. 
     
     
         27 . A battery comprising two anodes, and
 (I) a separator membrane disposed between said anodes, wherein the said membrane comprises (A) a poly(dialkylene ester) thermoplastic polyurethane composition;   wherein said poly(dialkylene ester) thermoplastic polyurethane composition is made by reacting (i) at least one poly(dialkylene ester) polyol intermediate with (ii) at least one diisocyanate and (iii) at least one chain extender, wherein (i), the polyester polyol intermediate, comprises an intermediate derived from at least one dialkylene glycol and at least one di-carboxylic acid, or an ester or anhydride thereof; and (B) an electrochemically active electrolyte species.   
     
     
         28 . The battery of  claim 27  wherein component (iii) the chain extender comprises hydroquinone bis (beta-hydroxyethyl) ether. 
     
     
         29 . The battery of  claim 27  wherein (ii), the diisocyanate, comprises: 4,4′-methylenebis-(phenyl isocyanate); hexamethylene diisocyanate; 3,3′-dimethylbiphenyl-4,4′-diisocyanate; m-xylylene diisocyanate; phenylene-1,4-diisocyanate; naphthalene-1,5-diisocyanate; diphenylmethane-3,3′-dimethoxy-4,4′-diisocyanate; toluene diisocyanate; isophorone diisocyanate; 1,4-cyclohexyl diisocyanate; decane-1,10-diisocyanate; dicyclohexylmethane-4,4′-diisocyanate; or combinations thereof; and
 wherein (iii), the chain extender, comprises: hydroquinone bis (beta-hydroxyethyl) ether; ethylene glycol; diethylene glycol; propylene glycol; dipropylene glycol; 1,4-butanediol; 1,6-hexanediol; 1,3-butanediol; 1,5-pentanediol; neopentylglycol; or combinations thereof. 
 
     
     
         30 . The battery of  claim 27  wherein said electrolyte species is a liquid electrolyte comprising an alkali metal salt, wherein said electrolyte is dissolved in an aprotic organic solvent. 
     
     
         31 . The battery of  claim 30  wherein said alkali metal salt is selected from the group consisting of materials having the formula M + X − ;
 wherein M +  is an alkali metal cation such as Li + , Na + , K +  or combinations thereof; and 
 wherein X −  is an ion such as Cl − , Br − , I − , ClO 4   − , BF 4   − , PF 6   − , AsF 6   − , SbF 6   − , CH 3 CO 2   − , CF 3 SO 3   − , (CH 3 SO 2 ) 2 N − , (CF 3 SO 2 ) 3 C − , B(C 2 O 4 ) 2   − , or combinations thereof; and 
 wherein said aprotic organic solvent is selected from the group consisting of propylene carbonate, ethylene carbonate, diethyl carbonate, ethyl methyl carbonate, dimethyl carbonate, dipropyl carbonate, dimethyl sulfoxide, acetonitrile, dimethyloxyethane, diethoxyethane, tetrahydrofuran, and combinations thereof.