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Preparation method of PET polyester based on emulsion polymerization process

An emulsion polymerization method and emulsion polymerization technology are applied in the field of preparation of PET polyester, which can solve the problems of high glass transition temperature and poor mechanical strength of PET polyester, and achieve the effects of improving mechanical strength and reducing glass transition temperature.

Inactive Publication Date: 2015-02-18
广州格兰德塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is: to solve the problem that the glass transition temperature of PET polyester is higher and the mechanical strength is not good

Method used

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  • Preparation method of PET polyester based on emulsion polymerization process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method based on the PET polyester of emulsion polymerization method may further comprise the steps:

[0027] Step 1. Preparation of polymer by emulsion polymerization: Add 90Kg of water and 2Kg of emulsifier into the reactor, stir evenly, then add 4Kg of acrylic acid, 4Kg of hydroxyethyl acrylate, and 5Kg of methyl methacrylate, stir evenly, and then add initiator Add 0.2Kg of agent, heat for polymerization reaction, then add 1Kg of iron trioxide, 10Kg of glass fiber, 4Kg of silicon oxide powder and stir evenly, obtain the polymer after suction filtration, wash the filter cake with ethanol, and dry the filter cake to obtain Prepolymer, the polymerization reaction temperature is 70°C, the polymerization reaction time is 1 hour, the initiator is potassium persulfate, the emulsifier is sodium dodecylbenzenesulfonate, and the length of the glass fiber is 10-500 microns ;

[0028] Step 2, prepolymer, polyethylene terephthalate 40Kg, butanediol diacrylate 3Kg...

Embodiment 2

[0032] The preparation method based on the PET polyester of emulsion polymerization method may further comprise the steps:

[0033] Step 1. Preparation of polymer by emulsion polymerization: Add 110Kg of water and 4Kg of emulsifier into the reactor, stir well, then add 6Kg of acrylic acid, 7Kg of hydroxyethyl acrylate, and 9Kg of methyl methacrylate, stir well, and then add trigger Add 0.4Kg of agent, heat for polymerization reaction, then add 2Kg of iron trioxide, 20Kg of glass fiber, 8Kg of silicon oxide powder and stir evenly, obtain the polymer after suction filtration, wash the filter cake with ethanol, and dry the filter cake to obtain Prepolymer, the polymerization reaction temperature is 80°C, the polymerization reaction time is 2 hours, the initiator is potassium persulfate, the emulsifier is sodium dodecylbenzenesulfonate, and the length of the glass fiber is 10-500 microns ;

[0034] The 2nd step, with prepolymer, polyethylene terephthalate 60Kg, butanediol diacryl...

Embodiment 3

[0038] The preparation method based on the PET polyester of emulsion polymerization method may further comprise the steps:

[0039] Step 1. Preparation of polymer by emulsion polymerization: Add 100Kg of water and 3Kg of emulsifier into the reactor, stir evenly, then add 5Kg of acrylic acid, 6Kg of hydroxyethyl acrylate, and 8Kg of methyl methacrylate, stir evenly, and then add initiator Add 0.3Kg of agent, heat to carry out polymerization reaction, then add 2Kg of iron trioxide, 15Kg of glass fiber, 6Kg of silicon oxide powder and stir evenly, obtain the polymer after suction filtration, then wash the filter cake with ethanol, after drying the filter cake, obtain Prepolymer, the polymerization reaction temperature is 75°C, the polymerization reaction time is 2 hours, the initiator is potassium persulfate, the emulsifier is sodium dodecylbenzenesulfonate, and the length of the glass fiber is 10-500 microns ;

[0040] Step 2, prepolymer, polyethylene terephthalate 50Kg, butane...

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Abstract

The invention relates to a preparation method of PET polyester based on an emulsion polymerization process, belonging to the technical field of high polymer materials. The preparation method comprises the following steps: adding water and an emulsifier into a reactor, uniformly stirring, then, adding acrylic acid, hydroxyethyl acrylate and methyl methacrylate, uniformly stirring, then, adding an initiator, heating to perform polymerization reaction, adding ferric oxide, glass fiber and silicon oxide powder, uniformly stirring, carrying out suction filtration to obtain a polymer, washing a filter cake by using alcohol, and drying the filter cake to obtain a prepolymer; uniformly mixing the prepolymer, polyethylene glycol terephthalate, butanediol diacrylate, a nucleating agent, an antioxidant, a silane coupling agent and a lubricant to obtain a mixture; and feeding the mixture into a twin-screw extruder, and extruding and pelletizing. According to the polyester material provided by the invention, the glass fiber is prepared into the prepolymer by virtue of an emulsion coating manner, and the prepolymer and the polyester are extruded to obtain the polymer material, so that the glass transition temperature of the polyester is lowered and the mechanical strength of the polyester is improved.

Description

[0001] technical field [0002] The invention relates to a method for preparing PET polyester based on an emulsion polymerization method, and belongs to the technical field of polymer materials. [0003] Background technique [0004] Polyester is the abbreviation of polyethylene terephthalate and ethylene glycol, commonly known as polyester, or PET for short. It is a high polymer that is derived from the dehydration condensation reaction of ethylene terephthalate. Ethylene terephthalate is obtained from the esterification of terephthalic acid and ethylene glycol. PET is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface. It has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. It has excellent electrical insulation. Even at high temperature and high frequency, its electrical properties are still good, but its corona resistance is poor. Creep resistance, fatigue...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L33/12B29C47/92C08F220/14C08F220/28C08F220/06C08F2/26C08F2/44C08K7/14C08K3/34C08K3/22B29C48/92
Inventor 黄新东刘天人
Owner 广州格兰德塑胶科技有限公司
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