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Method for preparing white latex by utilizing polystyrene waste

A technology of polystyrene and white latex, which is applied in the field of white latex preparation, can solve the problems that the added amount of emulsion has a great influence on the performance of the emulsion, the polystyrene is easy to precipitate, and the viscosity of the emulsion is low, so as to make up for the shortage of market supply and have good adhesive performance , fast drying effect

Inactive Publication Date: 2010-07-28
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are three main reasons: 1. Due to the high rigidity of the polystyrene chain, the polyvinyl acetate emulsion obtained by adding polystyrene waste, the coating is brittle and easy to crack after sizing and drying; The ethylene chain is easy to oxidize, causing the coating after sizing to turn yellow during the drying process, which affects the appearance; 3. The amount of polystyrene waste added has a great influence on the performance of the emulsion. If the amount added is too small, the viscosity of the emulsion is low. Add too much, polystyrene is easy to precipitate, and the emulsion is unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method of utilizing polystyrene waste to prepare white latex, the step of preparing white latex is:

[0027] (1) Preparation of vinyl acetate solution: 120g of polystyrene foam waste after purification, pulverization and drying was added to the mixture of 500g of vinyl acetate and 30g of butyl acrylate, stirred and dissolved completely;

[0028] (2) Preparation of polyvinyl alcohol solution: add 1000 mL of deionized water to the reaction flask, heat to 80-90 °C, under stirring, add 60 g of polyvinyl alcohol 17-88; heat up to 90-95 °C, and dissolve by heat preservation 1 to 2 hours, until the solid polyvinyl alcohol is completely dissolved;

[0029] (3) prepare initiator solution: add 3g potassium persulfate to 10mL deionized water, stir and dissolve completely;

[0030] (4) Emulsion polymerization: Add 4g OP-10 and 3g sodium dodecylbenzenesulfonate to the polyvinyl alcohol solution under stirring at 55-60°C, stir for 30 minutes, and slowly add 100g vinyl acetate solu...

Embodiment 2

[0032] (1) prepare vinyl acetate solution: 100g of polystyrene foam plastic waste after purification, pulverization and drying is added to the mixture of 500g vinyl acetate and 20g butyl acrylate, and stirring and dissolving is complete;

[0033] (2) Preparation of polyvinyl alcohol solution: add 1000 mL of deionized water to the reaction flask, heat to 80-90 °C, and under stirring, add 65 g of polyvinyl alcohol 17-88; heat to 90-95 °C, heat preservation and dissolve 1 to 2 hours, until the solid polyvinyl alcohol is completely dissolved;

[0034] (3) prepare initiator solution: add 3g potassium persulfate to 10mL deionized water, stir and dissolve completely;

[0035] (4) Emulsion polymerization: Add 4g OP-10 and 3g sodium dodecylbenzenesulfonate to the polyvinyl alcohol solution under stirring at 55-60°C, stir for 30 minutes, and slowly add 90g vinyl acetate solution With 5g of initiator solution, heating, stirring and refluxing reaction, when system temperature rises to 75...

Embodiment 3

[0037] (1) Preparation of vinyl acetate solution: 110g of polystyrene foam waste after purification, pulverization and drying was added to the mixture of 580g vinyl acetate and 25g butyl acrylate, and stirred and dissolved completely;

[0038] (2) Preparation of polyvinyl alcohol solution: add 1000mL of deionized water to the reaction flask, heat to 80-90°C, under stirring, add 65g of polyvinyl alcohol 20-88; heat up to 90-95°C, dissolve by heat preservation 1 to 2 hours, until the solid polyvinyl alcohol is completely dissolved;

[0039] (3) Preparation of initiator solution: 4g of ammonium persulfate was added to 10mL of deionized water, stirred and dissolved completely;

[0040](4) Emulsion polymerization: Add 5g OP-10 and 3g sodium dodecylbenzenesulfonate to the polyvinyl alcohol solution under stirring at 55~60℃, stir for 30 minutes, slowly add 100g vinyl acetate solution With 5g of initiator solution, heating, stirring and refluxing reaction, when system temperature ris...

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Abstract

The invention relates to the field of recycling of polystyrene waste, in particular to a method for preparing white latex by utilizing the polystyrene waste. In order to overcome the defects in the prior art for preparing polystyrene / polyvinyl acetate core-shell emulsion, the invention provides the method for preparing the white latex from the polystyrene waste, which can overcome the defects of rigidity and easy oxidability of polystyrene chains and ensure that the polyvinyl acetate emulsion prepared after the polystyrene waste is added has stability. The compositions for preparing the white latex by utilizing the polystyrene waste comprise deionized water, the polystyrene waste, polyvinyl alcohol, vinylacetate, acrylic ester, an initiator, an emulsifier, a plasticizer and an antioxygen. The method for preparing the white latex by utilizing the polystyrene waste comprises the following steps: (1) preparing solution of vinylacetate; (2) preparing solution of polyvinyl alcohol; (3) preparing solution of initiator; and (4) performing emulsion polymerization.

Description

technical field [0001] The invention relates to the field of recycling and reuse of polystyrene waste, in particular to a method for preparing white latex by using polystyrene waste. Background technique [0002] Polystyrene has the characteristics of light weight, non-toxic, acid and alkali resistance, weather resistance, heat insulation, soundproof, shockproof, easy to form, etc. It is widely used as a packaging material for household appliances, instruments, handicrafts, fragile building materials, etc. But such materials are usually single-use and discarded after use, resulting in "white pollution". At present, the main methods of disposal of polystyrene waste are: landfill incineration, pyrolysis and recovery of styrene, steam melt extrusion to prepare foam board, and solvent recovery of polystyrene. will bring about secondary pollution. Therefore, finding an economical and environmentally friendly recycling method is an important way to deal with polystyrene foam was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F261/04C08F218/08C08F220/18C08F2/24C08K5/134C08K5/526
Inventor 肖孝辉罗虹艾文林大勤仝水田
Owner ZHEJIANG NORMAL UNIVERSITY
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