decane 1 3 dicarboxylic acid and 3 46 g of 1 4 cyclohexanedimethanol were placed to the resulting mixture 0 021 g of 1 chloro 3 hydroxy 1 1 3 3 tetra n butyldistannoxane was added under flow of dried nitrogen gas the resulting mixture was heated to 200 u00b0 c was stirred for about 1 hour and thereby yielded a homogenous mixture additionally 30 ml of decalin was added thereto and thereby yielded two phase mixture the resulting mixture was stirred under reflux of decalin for 60 hours to perform a polycondensation reaction after the completion of the reaction decalin was removed by flowing out the reaction mixture was dissolved in 100 ml of chloroform was added dropwise in small increments to 1500 ml of methanol the resulting polymer was filtrated was rinsed with methanol was dried in vacuo and thereby yielded a white polyester the polyester was stirred with methanol for 12 hours the resulting white powdery polymer was separated by filtration was dried at 60 u00b0 c under a reduced pressure and thereby yielded a polyester the polymer had an mn of 14000 an mw mn of 2 3 a tg of 73 u00b0 c and a td 5 of 410 u00b0 c a polyester was prepared.