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Propylene epoxide-carbon dioxide copolymer and preparation method thereof

A technology of carbon dioxide and propylene oxide, which is applied in the field of polymers, can solve the problems of complex reaction process and difficult control of the synthesis process, and achieve the effects of easy selection, reduced production cost and sufficient reaction

Pending Publication Date: 2019-03-08
SEDIN NINGBO ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But the existing propylene oxide-carbon dioxide copolymer is mainly by placing carbon dioxide and propylene oxide in a synthesis reactor, controlling the temperature and pressure in the synthesis reactor, and directly reacting and synthesizing under the action of a catalyst; at present, propylene oxide- The synthesis process of carbon dioxide copolymer is complex and difficult to control

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  • Propylene epoxide-carbon dioxide copolymer and preparation method thereof
  • Propylene epoxide-carbon dioxide copolymer and preparation method thereof
  • Propylene epoxide-carbon dioxide copolymer and preparation method thereof

Examples

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preparation example Construction

[0026] The invention provides a kind of preparation method of propylene oxide-carbon dioxide copolymer, see figure 1 As shown, the preparation method divides the preparation of propylene oxide-carbon dioxide copolymer into two processes of pre-polymerization and polymerization, wherein the pre-polymerization is carried out in a pre-polymerization kettle, and the polymerization is carried out in a polymerization kettle, that is, the present invention The preparation method of the provided propylene oxide-carbon dioxide copolymer adopts a multi-reservoir series polymerization process.

[0027] The specific preparation process is as follows: first, propylene oxide and the catalyst are added into the prepolymerization tank according to a certain ratio, and then stirred, and then carbon dioxide gas is introduced into the prepolymerization tank, and the amount of carbon dioxide added is determined according to the amount of propylene oxide added. ;Control the pressure in the prepoly...

Embodiment 1

[0036] The present embodiment provides a kind of preparation method of propylene oxide-carbon dioxide copolymer, and this preparation method comprises the steps:

[0037] S1: Add propylene oxide whose volume is 1 / 4 of the volume of the pre-polymerization tank and a catalyst whose mass is 0.5% of the mass of propylene oxide to the pre-polymerization tank, and stir at a stirring speed of 10 rpm;

[0038] S2: From the bottom of the prepolymerization kettle, feed carbon dioxide gas whose quality is 40% of the propylene oxide feed quality into the prepolymerization kettle, control the pressure in the prepolymerization kettle to be 4.0Mpag, and control the temperature in the prepolymerization kettle to be 60 ℃, carry out the prepolymerization reaction until the viscosity of the product in the prepolymerization tank is 200cP, and obtain the propylene oxide-carbon dioxide prepolymer;

[0039] S3: Add the propylene oxide-carbon dioxide prepolymer into the polymerization kettle, stir at...

Embodiment 2

[0044] Different from Example 1, the preparation method of the propylene oxide-carbon dioxide copolymer provided in this example comprises the following steps:

[0045] S1: Add propylene oxide whose volume is 1 / 2 of the volume of the pre-polymerization tank and catalyst whose mass is 1.5% of the mass of propylene oxide to the pre-polymerization tank, and stir at a stirring speed of 40 rpm;

[0046] S2: From the bottom of the prepolymerization kettle, feed carbon dioxide gas with a quality of 60% of the propylene oxide feed quality into the prepolymerization kettle, control the pressure in the prepolymerization kettle to be 5.5Mpag, and control the temperature in the prepolymerization kettle to be 75 ℃, carry out the prepolymerization reaction until the viscosity of the product in the prepolymerization tank is 450cP, and obtain the propylene oxide-carbon dioxide prepolymer;

[0047] S3: Add the propylene oxide-carbon dioxide prepolymer into the polymerization kettle, stir at a ...

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Abstract

The invention discloses a propylene epoxide-carbon dioxide copolymer and a preparation method thereof. The preparation method of the propylene epoxide-carbon dioxide copolymer comprises the followingsteps: S1, adding propylene epoxide and a catalyst in a prepolymerization kettle and stirring; S2, feeding carbon dioxide gas in the prepolymerization kettle, and carrying out prepolymerization to obtain a propylene epoxide-carbon dioxide prepolymer; and S3, adding the propylene epoxide-carbon dioxide prepolymer in a polymerizing kettle, stirring, feeding carbon dioxide gas into the polymerizing kettle, and carrying out polymerization to obtain the propylene epoxide-carbon dioxide copolymer. According to the preparation method of the propylene epoxide-carbon dioxide copolymer, preparation of the propylene epoxide-carbon dioxide copolymer is divided into two processes including prepolymerization and polymerization, thus, the viscosities of products in the same reaction kettle are close to one another, stirring structures are easy to select, uniform stirring is implemented, and the stability of the products is improved favorably.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a propylene oxide-carbon dioxide copolymer and a preparation method thereof. Background technique [0002] Carbon dioxide is the greenhouse gas that has the greatest impact on global warming, and one of the main raw materials for the synthesis of propylene oxide-carbon dioxide copolymers is carbon dioxide, which can consume a large amount of carbon dioxide during the synthesis process; at the same time, propylene oxide - Carbon dioxide copolymer is a fully degradable polymer. Propylene oxide-carbon dioxide copolymer has the advantages of low production cost, good transparency and gas barrier properties, and excellent processing performance. It can replace non-degradable plastic products and is widely used in films And the field of packaging materials, it has revolutionary significance for solving "white pollution". [0003] But the existing propylene oxide-carbon dioxide copoly...

Claims

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Application Information

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IPC IPC(8): C08G64/34
CPCC08G64/34
Inventor 李雅静刘明亮娄哲翔蒋瑶应利诚孟艳王宇光王献红周庆海赵化龙贾峰何靓
Owner SEDIN NINGBO ENG
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