| abstract |
A polyphenylene ether resin composed of structural units represented by general formula (I) and/or structural units represented by general formula (II) which is similar to general formula (I) and structural units represented by general formula (III), wherein the sum of the contents of the structural units (I) and (II) amounts to 96 to 40 % by mol and the content of the structural units (III) amounts to 60 to 4 % by mol, and a process for producing the same, wherein R?1, R2 and R3¿ represent each alkyl, cycloalkyl, etc. or H (provided that two or more of them do not represent H at the same time), or one of R?1, R2 and R3¿ represents alkyl or H while the other two form together a saturated ring, or R1 to R3 together form an aromatic ring; A represents alkyl; p is a number of from 3 to 5; and Y represents an acid residue; wherein R?7 and R8¿ represent each alkyl, cycloalkyl, etc. or form together a saturated ring; q is a number of from 3 to 20; and A, p and Y are each as defined above. The resin has the effect of adsorbing bile acid and is useful as a cholesterol-lowering agent. |