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A modified hydrotalcite, its preparation method and its application in polyvinyl chloride processing

A technology of polyvinyl chloride and modified water, which is applied in the treatment of dyed polymer organic compounds and fibrous fillers, etc., can solve the problems of complex operation process and reducing the plasticity of polyvinyl chloride materials, and achieve uniform coating and better comprehensive performance Good, small particle size effect

Inactive Publication Date: 2018-11-27
河北雄发新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned modification treatment method of hydrotalcite is complicated in operation process, and while improving the stability of polyvinyl chloride material, it will reduce the plasticity of polyvinyl chloride material

Method used

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  • A modified hydrotalcite, its preparation method and its application in polyvinyl chloride processing
  • A modified hydrotalcite, its preparation method and its application in polyvinyl chloride processing
  • A modified hydrotalcite, its preparation method and its application in polyvinyl chloride processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of methyl methacrylate and butyl methacrylate polymer emulsion: after feeding N 2 Under the protection of protection, add 800ml of distilled water, 5.2g of sodium dodecyl sulfate (SDS), and 0.7g of potassium persulfate (APS) into a three-necked flask, stir at a speed of 140rpm, heat up to 45°C, and then start to A mixed monomer of 113g methyl methacrylate (MMA) and 71g butyl methacrylate (BMA) was added dropwise at a speed of min, and the reaction temperature was controlled at 60°C after the dropwise addition. After reacting for 1 hour, 170 g of MMA monomer was added dropwise at a rate of 1.6 ml / min, and the reaction was continued for 1 hour. Raise the temperature to 85°C, keep it warm for 1 hour, cool down to room temperature and discharge for use. The primary particle size of the generated emulsion is 0.03-0.08μm, and the particles have a spherical core-shell structure.

[0027] Emulsion coating treatment: add the hydrotalcite prepared in Comparative Exam...

Embodiment 2

[0029] Preparation of methyl methacrylate and ethyl acrylate polymer emulsion: add 800ml of deionized water to a three-necked flask with a condenser, and then add 8g of SDS and 0.4-0.5g of ammonium persulfate , Stir and heat up to 60°C, then add 292g MMA dropwise within 4 hours, react for 1 hour after the addition, and then add 108g (MMA+EA: 28g methyl methacrylate + 80g ethyl acrylate) mixture dropwise , and the addition time was 1 hour. After adding the materials, raise the temperature to 86°C and continue the reaction for 1.5 hours to obtain an emulsion, which is set aside. The primary particle size of the generated emulsion is 0.03-0.08 μm, and the particle is a spherical core-shell structure.

[0030] Emulsion coating treatment: add the hydrotalcite prepared in Comparative Example 1 to the emulsion generated in step (1) and stir. The proportion of hydrotalcite added is: 93.5%, 96.5%, and 99.5%. The speed is 150r / min, and the stirring time is 0.5 hour. After the stirring...

Embodiment 3

[0032] The preparation of styrene and butyl acrylate polymer emulsion: in the there-necked flask equipped with reflux condenser and stirring, add 400ml deionized water, add N 2 After the oxygen exhaust is qualified, add the pre-prepared sodium lauryl sulfate solution (1.6g sodium lauryl sulfate and 20ml deionized water), raise the temperature to 80°C, and add the pre-prepared butyl acrylate / o-phthalic acid solution at this temperature 18.9 g of diallyl diformate (BA / DAP=99 / 1) solution was stirred for 10 minutes, then a pre-prepared ammonium persulfate solution (0.8 g of ammonium persulfate 10 ml of deionized water) was added, and reacted for 30 minutes. In the above solution, under the same temperature conditions, 230g of styrene / divinylbenzene (St / DVB=99 / 1) and 4.8g of sodium ethylenediaminetetraacetic acid (EDTA) solution (concentration of 0.2 wt%) was added for 2 hours, reacted for 0.5 hours after adding, then synchronously added dropwise 151.1gBA / DAP (99 / 1) and 339.43g ini...

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Abstract

The invention discloses modified hydrotalcite, as well as a preparation method and application thereof in processing of polyvinyl chloride. The preparation method comprises the following steps of (1) using water as a solvent, adding an emulsifying agent, a polyacrylate monomer and an initiating agent, and performing a polymerization reaction at normal pressure so as to obtain an emulsion; and (2) adding hydrotalcite to the emulsion generated in the step (1), performing stirring, after the stirring is finished, performing suction filtration, performing washing with water, and performing drying so as to obtain the modified hydrotalcite. In the modified hydrotalcite, polyacrylate is coated on the hydrotalcite. The preparation process of the modified hydrotalcite is simple; and when the modified hydrotalcite is used for the processing course of the polyvinyl chloride, the plasticity of the polyvinyl chloride can be obviously improved, but the heat stability of PVC and the properties of products are not reduced.

Description

technical field [0001] The invention relates to a modified hydrotalcite and its preparation method and its application in polyvinyl chloride processing, in particular to a coating treatment modified hydrotalcite and its coating treatment method and its application in polyvinyl chloride processing The application in polyvinyl chloride belongs to the category of polyvinyl chloride processing aids. Background technique [0002] Polyvinyl chloride (PVC) has good mechanical properties and corrosion resistance, and can be made into hard, semi-rigid and soft products to meet the processing needs of PVC products in various aspects. However, PVC also has defects such as difficulty in processing, release of hydrogen chloride gas due to chain breakage of molecular chains during high-temperature processing, poor thermal stability, and poor impact resistance of hard products. In order to overcome these shortcomings and improve the processing performance and thermal stability of PVC, var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/10C08K9/04C08K3/26C08K5/098C08K5/053C09C1/40C09C3/10C08F220/14C08F220/18C08F212/08C08F212/36C08F2/26
Inventor 王兴为沈杰霍金生
Owner 河北雄发新材料科技发展有限公司
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