(JP10223044-A)      A gel-type solid polymer electrolyte comprises: (a) a matrix consisting of an acrylic ester polymer with structural units derived from 1 or more acrylic esters of formula (I) and (II), (b) a non-aqueous solvent composed of carbonic ester, and (c) a salt of a Group Ia metal of the Periodic Table.    CH2=C(R1)-C(=O)-O-(C(R2)HC(R2')HO)n-C(=O)-O-R3 (I)    CH2=C(R4)-C(=O)-O-(C(R5)HC(R6)HO)p-[C(=O)-O-(C(R7)HC(R8)HO)q]r-C(=O)-C(R9)=CH2 (II)    In (I) R1, R2' = independently H, 1-4C alkyl; R3 = 1-4C alkyl; n = 1-100. In (II) R4-R9 = H, or 1-4C alkyl; p, q, r = 1-100.    Also claimed is a process for producing the solid polymer electrolyte by polymerisation of a mixture of a salt of Group Ia metal, carbonic ester-based non-aqueous solvent and a solution of monomer (I) or/and (II).    USE -   The solid polymer electrolyte may be used in primary and secondary batteries, capacitors, electrochromic displays and medical actuators.    ADVANTAGE -   The electrolyte has high ionic conductivity and is electrochemically stable, so there will not be any problems with leakage, leading to high reliability.    (EP896340-A1)      A gel-type solid polymer electrolyte comprises: (a) a matrix consisting of an acrylic ester polymer with structural units derived from 1 or more acrylic esters of formula (I) and (II), (b) a non-aqueous solvent composed of carbonic ester, and (c) a salt of a Group Ia metal of the Periodic Table.    CH2=C(R1)-C(=O)-O-(C(R2)HC(R2')HO)n-C(=O)-O-R3 (I)    CH2=C(R4)-C(=O)-O-(C(R5)HC(R6)HO)p-[C(=O)-O-(C(R7)HC(R8)HO)q]r-C(=O)-C(R9)=CH2 (II)    In (I) R1, R2' = independently H, 1-4C alkyl; R3 = 1-4C alkyl; n = 1-100. In (II) R4-R9 = H, or 1-4C alkyl; p, q, r = 1-100.    Also claimed is a process for producing the solid polymer electrolyte by polymerisation of a mixture of a salt of Group Ia metal, carbonic ester-based non-aqueous solvent and a solution of monomer (I) or/and (II).    USE -   The solid polymer electrolyte may be used in primary and secondary batteries, capacitors, electrochromic displays and medical actuators.    ADVANTAGE -   The electrolyte has high ionic conductivity and is electrochemically stable, so there will not be any problems with leakage, leading to high reliability.    (CN1210613-A)      A gel-type solid polymer electrolyte comprises: (a) a matrix consisting of an acrylic ester polymer with structural units derived from 1 or more acrylic esters of formula (I) and (II), (b) a non-aqueous solvent composed of carbonic ester, and (c) a salt of a Group Ia metal of the Periodic Table.    CH2=C(R1)-C(=O)-O-(C(R2)HC(R2')HO)n-C(=O)-O-R3 (I)    CH2=C(R4)-C(=O)-O-(C(R5)HC(R6)HO)p-[C(=O)-O-(C(R7)HC(R8)HO)q]r-C(=O)-C(R9)=CH2 (II)    In (I) R1, R2' = independently H, 1-4C alkyl; R3 = 1-4C alkyl; n = 1-100. In (II) R4-R9 = H, or 1-4C alkyl; p, q, r = 1-100.    Also claimed is a process for producing the solid polymer electrolyte by polymerisation of a mixture of a salt of Group Ia metal, carbonic ester-based non-aqueous solvent and a solution of monomer (I) or/and (II).    USE -   The solid polymer electrolyte may be used in primary and secondary batteries, capacitors, electrochromic displays and medical actuators.    ADVANTAGE -   The electrolyte has high ionic conductivity and is electrochemically stable, so there will not be any problems with leakage, leading to high reliability.    (TW359905-A)      A gel-type solid polymer electrolyte comprises: (a) a matrix consisting of an acrylic ester polymer with structural units derived from 1 or more acrylic esters of formula (I) and (II), (b) a non-aqueous solvent composed of carbonic ester, and (c) a salt of a Group Ia metal of the Periodic Table.    CH2=C(R1)-C(=O)-O-(C(R2)HC(R2')HO)n-C(=O)-O-R3 (I)    CH2=C(R4)-C(=O)-O-(C(R5)HC(R6)HO)p-[C(=O)-O-(C(R7)HC(R8)HO)q]r-C(=O)-C(R9)=CH2 (II)    In (I) R1, R2' = independently H, 1-4C alkyl; R3 = 1-4C alkyl; n = 1-100. In (II) R4-R9 = H, or 1-4C alkyl; p, q, r = 1-100.    Also claimed is a process for producing the solid polymer electrolyte by polymerisation of a mixture of a salt of Group Ia metal, carbonic ester-based non-aqueous solvent and a solution of monomer (I) or/and (II).    USE -   The solid polymer electrolyte may be used in primary and secondary batteries, capacitors, electrochromic displays and medical actuators.    ADVANTAGE -   The electrolyte has high ionic conductivity and is electrochemically stable, so there will not be any problems with leakage, leading to high reliability.