Highly transparent copolyester synthesized by biomass-resource-derived monomers and preparation method for highly transparent copolyester
A technology of biomass resources and copolyesters is applied in the field of high transparency copolyesters synthesized by using monomers derived from biomass resources and its preparation to achieve the effect of reducing dependence and improving performance.
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[0030] Example 1 : Add 1.0 mol of terephthalic acid, 5.0 mol of ethylene glycol, and 0.4 mol of 2-methoxy-1,3- to a 1L stainless steel polymerizer (with an escape gas rectification tower with a theoretical plate number of about 6) Propylene glycol, 0.3mol isosorbide and 8.0×10 -4 mol nano zinc oxide, heating to control the reaction temperature of 165~170℃, and control the temperature of the top of the rectification tower of the escape gas to 98~102℃. After 4.7 hours of reaction, the reaction system is completely transparent.
[0031] Add 4.0×10 to the above transparent reaction system -4 mol ethylene glycol bismuth, 6.0×10 -5 mol triphenyl phosphite. The reaction temperature was increased to 245°C, and the temperature at the top of the escape tower was controlled to not exceed 205°C, and the excess ethylene glycol was evaporated. This process takes 1.5 hours.
[0032] After the reaction system is basically free of 205°C distillate, the reactor is gradually reduced in pressure usi...
Example Embodiment
[0034] Example 2 : Add 1.0 mol of terephthalic acid, 2.5 mol of ethylene glycol, and 1.0 mol of 2-methoxy-1,3- to a 1L stainless steel polymerizer (with an escape gas rectification tower with a theoretical plate number of about 2) Propylene glycol, 0.4mol isosorbide and 8.0×10 -4 mol tetrabutyl titanate, heating to control the reaction temperature of 235~240℃, control the temperature of the top of the rectification tower of the escaped gas to 98~100℃, after 2.5 hours of reaction, the reaction system is completely transparent.
[0035] Add 3.0×10 to the above transparent reaction system -4 mol glycol antimony, 6.0×10 -5 mol triphenyl phosphite. The reaction temperature was increased to 255°C, the temperature at the top of the escape tower was controlled to not exceed 205°C, and the excess ethylene glycol was evaporated. This process takes 1.2 hours.
[0036] After the reaction system is basically free of 205°C distillate, the reactor is gradually reduced in pressure using a vacuum...
Example Embodiment
[0038] Example 3 : Add 1.0 mol of terephthalic acid, 4.0 mol of ethylene glycol, and 0.6 mol of 2-methoxy-1,3 to a 1 L stainless steel polymerizer (with an escape gas rectification tower with a theoretical plate number of about 9) -Propylene glycol, 0.6mol isosorbide and 6.0×10 -4 mol tetrabutyl titanate, heating to control the reaction temperature of 215~220℃, control the temperature of the top of the rectification tower of the escaped gas to 98~100℃, after 3.2 hours of reaction, the reaction system is completely transparent.
[0039] Add 3.0×10 to the above transparent reaction system -4 mol glycol antimony, 6.0×10 -5 mol triphenyl phosphite. The reaction temperature was increased to 235°C, the temperature at the top of the escape tower was controlled to not exceed 205°C, and the excess ethylene glycol was evaporated. This process takes 1.7 hours.
[0040] After the reaction system is basically free of 205°C distillate, the reactor is gradually reduced in pressure using a vacuu...
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