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Application of aromatic zinc carboxylate complex catalyst for preparing aliphatic polycarbonate

A technology of zinc aromatic carboxylate and polycarbonate, which is applied in the application field of zinc aromatic carboxylate complex catalysts for the preparation of aliphatic polycarbonate, can solve the problem of low carbon dioxide reactivity, achieve stable structure, and prepare The effect of simple method and simple operation process

Inactive Publication Date: 2010-07-07
NANYANG ZHONGJU TIANGUAN LOW CARBON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low reactivity of carbon dioxide, the development of efficient catalysts for the copolymerization of carbon dioxide and epoxy compounds is an important part of this research.

Method used

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  • Application of aromatic zinc carboxylate complex catalyst for preparing aliphatic polycarbonate
  • Application of aromatic zinc carboxylate complex catalyst for preparing aliphatic polycarbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Put 0.10g of salicylaldehyde condensation anthranilate zinc complex catalyst and a stirrer into a pre-dried 100mL stainless steel autoclave, heat up to 120°C and vacuum dry for 6h, cool to room temperature, fill with carbon dioxide to normal pressure, Add 20 mL (19.2 g) of epoxycyclohexane into the reaction kettle with a glass syringe, fill with carbon dioxide, keep the pressure at 4.5 MPa, stir the reaction at 110° C. for 80 h, stop the reaction, and cool to room temperature.

[0019] Take out the reactant, recover the unreacted epoxycyclohexane by distillation under reduced pressure, dissolve the residue with an appropriate amount of dichloromethane, slowly add it dropwise to a sufficient amount of methanol stirred at high speed, and precipitate a high polymer, filter, methanol Washing and vacuum drying yielded 15.9 g of aliphatic polycarbonate. Its average molecular weight measured by gel permeation chromatography is 53600, through 1 H NMR analysis showed that the a...

Embodiment 2

[0021] In the same equipment used in Example 1, under the same conditions, the addition of epoxycyclohexane was 10mL (9.6g), at 70°C, the pressure was kept at 3.0MPa, and the reaction was carried out for 60h to obtain aliphatic polycarbonate 2.2 g of the ester, its average molecular weight is 32500, the alternating copolymerization rate of carbon dioxide and epoxycyclohexane is 95.2%, and the catalytic efficiency is 103 g of polymer / g of zinc.

Embodiment 3

[0023] In the same equipment used in Example 1, under the same conditions, the salicylaldehyde condensation anthranilate zinc complex catalyst is changed into 5-methyl salicylaldehyde condensation anthranilate zinc complex catalyst, and the ring The addition of oxycyclohexane was changed to 16ml (15.4g), and reacted at 4.0MPa and 110°C for 72h to obtain 18.2g of aliphatic polycarbonate, whose average molecular weight was 58400, and the alternating copolymerization ratio of carbon dioxide and epoxycyclohexane is 96.5%, and the catalytic efficiency is 893 g polymer / g zinc.

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Abstract

The invention discloses an application of aromatic zinc carboxylate complex catalyst for preparing aliphatic polycarbonate. The catalyst is a salicylaldehyde condensed zinc o-aminobenzoate complex or a substituted salicylaldehyde condensed zinc o-aminobenzoate complex prepared by the reaction of salicylaldehyde (or substituted salicylaldehyde), o-aminobenzoate and zinc acetate (Zn(OAc)2.2H2O). The carbon dioxide and the epoxy cyclohexane are catalyzed by using the catalyst at 60-180 DEG C under the carbon dioxide pressure of 1.0-6.0MPa for copolymerization, and the aliphatic polycarbonate with different molecular weights can be obtained; the alternating copolymerization rate of the carbon dioxide and the epoxy cyclohexane is larger than 95 percent, and the catalytic efficiency reaches 893 g polymer / g zinc at maximum.

Description

technical field [0001] The invention relates to the application of an aromatic carboxylic acid zinc complex catalyst for preparing aliphatic polycarbonate, especially the application in preparing aliphatic polycarbonate through carbon dioxide and epoxycyclohexane copolymerization. Background technique [0002] Chemical utilization of carbon dioxide is one of the effective methods to reduce carbon dioxide emissions and protect the environment. Synthesis of aliphatic polycarbonate by reacting carbon dioxide with epoxy compounds is not only simple, low cost and wide in source, but also an effective way to chemically fix carbon dioxide with low pollution and environmental friendliness. The aliphatic polycarbonate prepared by the copolymerization of carbon dioxide and epoxy compounds not only has photodegradability and biodegradability, but also has excellent oxygen and water barrier properties. Therefore, it can be used as engineering plastics, biodegradable non-polluting mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/34
Inventor 卜站伟杜风光崔元臣马冬清王志强
Owner NANYANG ZHONGJU TIANGUAN LOW CARBON TECH
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