Polyether ester block copolymer

Abstract

To provide a polyether ester block copolymer which has surface hardness suitable to be applied to a structural member and excellent in sound deadening quality and tribological property, a polyether ester block copolymer of the present invention comprises (a) aromatic dicarboxylic acid unit, (b) 1,3-propanediol and/or 1,4-butanediol unit and (c) long chain diol unit mainly including polyoxytrimethylene glycol, wherein the durometer hardness (type D), measured according to the principle of the method described in JIS K6253, is 40 or larger and 78 or smaller.

1 . A polyether ester block copolymer comprising (a) aromatic dicarboxylic acid unit, (b) 1,3-propanediol and/or 1,4-butanediol unit and (c) long chain dial unit mainly including polyoxytrimethylene glycol, wherein
 the durometer hardness (type D), measured according to the principle of the method described in JIS K6253, is 40 or larger and 78 or smaller.   
   
   
       2 . A polyether ester block copolymer as defined in  claim 1 , wherein said (c) long chain dial unit mainly including polyoxytrimethylene glycol is a condensation product of 1,3-propanediol. 
   
   
       3 . A polyether ester block copolymer as defined in  claim 1  or  claim 2 , wherein said (b) 1,3-propanediol and/or 1,4-butanediol unit is 1,4-butanediol unit. 
   
   
       4 . A sound deadening structural member using said polyether ester block copolymer as defined in any one of  claims 1  to  3 . 
   
   
       5 . An auto part comprising said sound deadening structural member as defined in  claim 4 . 
   
   
       6 . An electric/electronic device part comprising said sound deadening structural member as defined in  claim 4 .