(US5731104-A)      A liq. electrolyte plasticiser of formula (I) is new. RaO-(OC2Rb4)_-(CO)_-[O(X)_-Rc(Z)(Y)(X)_-O-CO-]l-(OC2Rb4)_-ORa (I) Ra = alkyl, -(CO)ORd, -(CH2)_-(OC2Rb4)_-ORd Rb = H, alkyl, alkenyl, fluoro and fluorinated lower alkyl; Rc = alkylene or -(C_H2_)_-(OC2Rb4)_-; Rd = H or alkyl; X = lower alkylene; Y = H, aryl and alkyl; Z = H, CH2O(CO)ORa; , , l, , = 0-10; = 0, 1 or 2; p = 1-5; and q = 0-6. Rb is as previously defined; Ri = alkyl, -(OC2Rb)_-Rj or -(CO)ORj, Rj = H, alkyl or -(OC2Rb4)_-Rk; and Rk = H or alkyl.    USE -   The liq. electrolyte plasticisers, conductive compsns. and conductive films are used in solid-state batteries, fuel cells, sensors, supercapacitors, and electrochromic devices.    ADVANTAGE -   The solid state batteries have enhanced ambient temp. conductivity and rechargeability.    (JP10512390-W)      A liq. electrolyte plasticiser of formula (I) is new. RaO-(OC2Rb4)_-(CO)_-[O(X)_-Rc(Z)(Y)(X)_-O-CO-]l-(OC2Rb4)_-ORa (I) Ra = alkyl, -(CO)ORd, -(CH2)_-(OC2Rb4)_-ORd Rb = H, alkyl, alkenyl, fluoro and fluorinated lower alkyl; Rc = alkylene or -(C_H2_)_-(OC2Rb4)_-; Rd = H or alkyl; X = lower alkylene; Y = H, aryl and alkyl; Z = H, CH2O(CO)ORa; , , l, , = 0-10; = 0, 1 or 2; p = 1-5; and q = 0-6. Rb is as previously defined; Ri = alkyl, -(OC2Rb)_-Rj or -(CO)ORj, Rj = H, alkyl or -(OC2Rb4)_-Rk; and Rk = H or alkyl.    USE -   The liq. electrolyte plasticisers, conductive compsns. and conductive films are used in solid-state batteries, fuel cells, sensors, supercapacitors, and electrochromic devices.    ADVANTAGE -   The solid state batteries have enhanced ambient temp. conductivity and rechargeability.    (US6015638-A)      A liq. electrolyte plasticiser of formula (I) is new. RaO-(OC2Rb4)_-(CO)_-[O(X)_-Rc(Z)(Y)(X)_-O-CO-]l-(OC2Rb4)_-ORa (I) Ra = alkyl, -(CO)ORd, -(CH2)_-(OC2Rb4)_-ORd Rb = H, alkyl, alkenyl, fluoro and fluorinated lower alkyl; Rc = alkylene or -(C_H2_)_-(OC2Rb4)_-; Rd = H or alkyl; X = lower alkylene; Y = H, aryl and alkyl; Z = H, CH2O(CO)ORa; , , l, , = 0-10; = 0, 1 or 2; p = 1-5; and q = 0-6. Rb is as previously defined; Ri = alkyl, -(OC2Rb)_-Rj or -(CO)ORj, Rj = H, alkyl or -(OC2Rb4)_-Rk; and Rk = H or alkyl.    USE -   The liq. electrolyte plasticisers, conductive compsns. and conductive films are used in solid-state batteries, fuel cells, sensors, supercapacitors, and electrochromic devices.    ADVANTAGE -   The solid state batteries have enhanced ambient temp. conductivity and rechargeability.