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.

Active Publication Date: 2011-11-23
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regardless of hydrogenation of terephthalic acid (US6495730) or hydrogenation of terephthalate (Zhu Zhiqing et al., Fine Petrochemical, 2004, 6:7~10), every mo

Method used

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  • Highly transparent copolyester synthesized by biomass-resource-derived monomers and preparation method for highly transparent copolyester
  • Highly transparent copolyester synthesized by biomass-resource-derived monomers and preparation method for highly transparent copolyester

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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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Abstract

The invention discloses highly transparent copolyester synthesized by biomass-resource-derived monomers and a preparation method for the highly transparent copolyester, and relates to the field of preparation of modified polyester through copolymerization. The preparation method comprises the following steps of: adding terephthalic acid, glycol, 2-methoxy-1,3-propanediol, isosorbide and an esterification catalyst into a reactor, reacting by controlling certain temperature, and making water generated in the reaction escape from the reactor until a reaction system is completely transparent; adding a condensation catalyst and a phosphorus-containing stabilizer into the completely transparent reaction liquid, raising the temperature for reaction, and controlling distillation temperature not to exceed 205DEG C until components are not distilled off basically; gradually depressurizing the reaction system, reacting for certain period of time by controlling certain temperature and vacuum degree, and completing the condensation reaction to obtain copolyester; and stopping vacuumizing, introducing nitrogen into the reactor, and pressing the obtained copolyester out through a discharge valve. By the novel polyester with high transparency, the usability of the polyester is improved and the dependence of polyester production on fossil resources is reduced.

Description

technical field [0001] The invention relates to the preparation of modified polyester through copolymerization, in particular, the modified polyester with high transparency is obtained by using biomass resources as polyols to copolymerize with terephthalic acid and ethylene glycol. technical background [0002] Polyethylene terephthalate (PET) is a polymeric material with a large output and a wide range of uses. However, in some specific fields, such as: packaging film, air curtain, polyester bottle, etc., polyester materials are required to have good transparency, and ordinary PET cannot meet the application requirements in these occasions. [0003] In order to improve the transparency of ordinary PET, Chinese patents CN 1216051 and CN 1800236 and U.S. patent US 6429278 have proposed the method of ternary copolymerization with terephthalic acid (or ester) and ethylene glycol, 1,4-cyclohexanedimethanol , that is, adding the third monomer 1,4-cyclohexanedimethanol to ordina...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78
Inventor 单玉华罗娜任海永潘学林吴霞唐敏
Owner 溧阳常大技术转移中心有限公司
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