Polyester-polycarbonate copolymer, polyester product, its preparation method and application

A polycarbonate and copolymer technology, applied in the polymer field, can solve the problems of inability to guarantee the safety of users' lives and property, insufficient glass transition temperature of polyester, and weak flame retardant performance.

Active Publication Date: 2020-12-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the glass transition temperature of polyester currently used in fields such as water cups, kitchen appliances, high-temperature disinfection products, and automobile manufacturing is obviously insufficient. Low, can not guarantee the user's life and property safety

Method used

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  • Polyester-polycarbonate copolymer, polyester product, its preparation method and application
  • Polyester-polycarbonate copolymer, polyester product, its preparation method and application
  • Polyester-polycarbonate copolymer, polyester product, its preparation method and application

Examples

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preparation example Construction

[0036] A kind of preparation method of polyester-polycarbonate copolymer provided by an aspect of the embodiment of the present invention comprises:

[0037] The first mixed reaction system comprising the first dibasic alcohol, dimethyl carbonate and / or diphenyl carbonate, dibasic acid and / or its esterification, the second dibasic alcohol and esterification or transesterification catalyst React at 160-260°C to form intermediate products;

[0038] Making the second mixed reaction system comprising the intermediate product, stabilizer and polycondensation catalyst react at 180-300°C under a certain vacuum condition (for example, lower than 300Pa) to obtain a polyester-polycarbonate copolymer;

[0039] Described first dibasic alcohol adopts the phosphorus-containing dibasic alcohol shown in following formula I:

[0040]

[0041] Formula I

[0042] Among them, R 1 , R 2 , R 3 , R 4 At least independently selected from hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen atom (suc...

Embodiment 1

[0091] Example 1 Add dimethyl terephthalate, phosphorus-containing compound P4 (formula II), dimethyl carbonate, ethylene glycol, and anhydrous zinc acetate to the reactor in a molar ratio of 1:0.1:0.2:2.1:0.001 In, heat up to 180°C, react for 4.0h, then add antimony trioxide with a molar weight of dimethyl terephthalate of 1‰, triphenyl phosphate with a molar weight of dimethyl terephthalate of 1.5‰, vacuum degree 25Pa , heated up to 280°C, reacted for 3.5h, and the obtained final product 1 H-NMR such as figure 1 As shown, it is polyethylene terephthalate dimethyl carbonate glycol phosphorus-containing glycol copolymer, and its structure is shown in formula III. The glass transition temperature of the final product is 95°C, and the DSC spectrum is as follows figure 2 shown, in nitrogen T 5% The thermal weight loss temperature is 414°C, and the TGA spectrum is as follows image 3 Shown, flame retardant performance test V1 level.

[0092]

[0093] Formula III (m, n, j,...

Embodiment 19

[0109] Example 19: The polyethylene dimethyl terephthalate carbonate phosphorus-containing glycol copolymer obtained in Example 1 was melt-extruded and granulated in a co-rotating twin-screw extruder. The working parameters of the co-rotating twin-screw extruder are as follows: the barrel temperature is 265°C-275°C, and the die head temperature is 275°C-285°C. Then use the injection molding machine to inject it into a standard sample. The parameters of the injection molding machine are: the barrel temperature is 270 ° C ~ 285 ° C, the pressure holding time is 10s, and the standard sample is tested according to ASTM D638-08 and GB / T1843-2008. Test results showed that the tensile properties, elongation at break and notched impact strength of the standard sample were ideal.

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Abstract

The invention discloses a polyester-polycarbonate copolymer, a polyester product, a preparation method and application thereof. The preparation method comprises: copolymerizing phosphorus-containing glycol with dimethyl carbonate / diphenyl carbonate, dibasic acid and glycol to prepare polyester-polycarbonate copolymer. The present invention uses phosphorus-containing aromatic diols as comonomers and introduces them into polyesters through polymerization, which can significantly improve the glass transition temperature and flame-retardant properties of existing polyesters. Further, through the combination of polycarbonate and polyester Copolymerization also increases the ester bond density of the copolymer, greatly increasing its heat resistance. The polyester-polycarbonate of the present invention has excellent high temperature resistance and flame retardancy, and its glass transition temperature can reach above 100°C, which can fully meet the heat resistance requirements of fire-fighting equipment, kitchen appliances, electronic products, automobile manufacturing, etc. , It also effectively protects the life and property safety of users with its excellent flame retardant properties.

Description

technical field [0001] The invention relates to a copolymer, in particular to a polyester-polycarbonate copolymer, its preparation method and application, and belongs to the technical field of macromolecules. Background technique [0002] High glass transition temperature (Tg), impact resistance, and transparent polymer materials have a very wide range of uses in fire-fighting equipment, baby bottles, water cups, kitchen appliances, food packaging, optical fields, decorative materials, and automobile manufacturing. Fields such as lightweight bulletproof glass also have special uses. [0003] At present, bisphenol A polycarbonate (BPA-PC) is the main polymer material with a Tg greater than 90°C and impact resistance and transparency, but it will slowly release bisphenol A during its use, causing stunted babies, cancer and metabolism. The EU has banned its use in baby food packaging and contact areas, and China has banned its use in baby food contact containers, water cups, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/692C08G63/64C08G63/78C08J5/18C08L67/00C08L69/00D01F6/92D01F1/10B32B33/00B32B27/36B32B27/06B32B7/12
CPCB32B7/12B32B27/06B32B27/36B32B27/365B32B33/00B32B2307/306B32B2307/3065C08G63/64C08G63/6926C08G63/78C08J5/18C08J2367/00C08J2369/00D01F1/10D01F6/92
Inventor 刘小青费璇江艳华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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