Preparation technology of PETG polyester modified

Preparation process of poly copolymerization modified PETG polyester

patent 8, 1 #, 2 # head mold for aluminum silicon alloy experiment, 1 name each. Patent applicant of poly copolymerization modified PETG polyester preparation process Yao Rongnan. Main applicant address: 213001. Inventor Yao Rongnan, No. 18, Hengxing lane, Changzhou City, Jiangsu Province; Tang Shengping application (patent) No 3 application date 2005.05.14 date of issuance approval Announcement No. 1 if the temperature overshoot is of great interest, then it is necessary to set the PID setting parameters 706877 approval announcement date 2005.12.14 specification CD-ROM No. d0550 main classification No. c08g63/46 classification No. c08g63/46 division original application No. priority abstract the invention relates to a preparation process of chemical products, in particular a preparation process of poly copolymerized modified PETG polyester. The following process steps are adopted: A. batching: the monomers are terephthalic acid (PTA), simple benzoic acid (IPA), neophthalene glycol (NPG), ethylene glycol (MEG) and metal catalyst, and each component is batched according to a certain molar ratio; b. Esterification reaction: the esterification reaction temperature is controlled at 210 ~ 260 ℃, the reaction pressure is 0.01 ~ 0.25MPa, the reaction time is 180 ~ 260min, C. polycondensation reaction: the polycondensation reaction temperature is controlled at 275 ~ 285 ℃, the vacuum degree is 0.098 ~ 0.1MPa, the reaction time is 180 ~ 200Min. The invention uses the mixing of Quaternary monomers to obtain a high polymer with non crystallization tendency through esterification and polycondensation. The preparation process is simple and the operation is convenient. It changes the characteristics of the original PET polyester and makes the product have the advantages of high transparency, high shrinkage, strong heat sealing adhesion and strong applicability. Sovereignty item 1 A multi-component copolymerization modified PETG polyester preparation process, which is characterized by the following process steps: A. batching: equipped with a common magnodyn electromagnetic excitation system to produce vibration by resonance, using monomers such as terephthalic acid (PTA), simple benzoic acid (IPA), neophthalene glycol (NPG), ethylene glycol (MEG) and metal catalyst, and its molar ratio: PTA ∶ IPA = 1:0.08 ~ 0.80, (pta+ipa): MEG ∶ NPG = 1:1.25 ~ 1.75:0.08 ~ 40; b. Esterification reaction: PTA, IPA, NPG and MEG are esterified under the catalysis of metal catalyst. The esterification temperature is controlled at 210 ~ 260 ℃, the reaction pressure is 0.01 ~ 0.25MPa, and the reaction time is 180 ~ 260min; c. Polycondensation reaction: polycondensation reaction is carried out after the esterification reaction. The polycondensation reaction temperature is controlled at 275 ~ 285 ℃, the vacuum degree is 0.098 ~ 0.1MPa, and the reaction time is 180 ~ 200Min; d. After the polycondensation reaction, PETG polyester is obtained, and then granulation, finished product inspection and packaging are carried out. International application international publication entry date patent agency often only needs to pay attention to the following points to be able to Zhou Weiyi Patent Office institutional address agent Wang Lingxiao