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Environment-protecting type water emulsion and its preparation method

A water-based emulsion, an environment-friendly technology, applied in the fields of environment-friendly water-based emulsion and building water-based emulsion, it can solve the problems of polystyrene waste foam containing residual toxicity and difficulty in recycling, etc., and achieve the effect of making up for poor water resistance and solving white pollution

Inactive Publication Date: 2003-03-05
王洪艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention combines polyvinyl alcohol and polystyrene waste foam to make an environment-friendly water-based emulsion, which solves the problems that polyvinyl alcohol contains residual poison and polystyrene waste foam is difficult to recycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh PVA: 6.5g, water: 60g, polystyrene (waste foam): 10.8g, ethyl acetate: 20.2g, ionic emulsifier (sodium dodecylbenzenesulfonate): 0.7g, nonionic Emulsifier (OP-10): 1.8g, crush polystyrene foam into particles, wash, dry, dissolve in ethyl acetate, add non-ionic emulsifier (OP-6) 1.8g and stir evenly, Dubbed the oil phase solution. Add water to polyvinyl alcohol, heat to 90-95°C under stirring condition, keep it warm for 1 hour, wait for it to completely dissolve, stop heating to obtain polyvinyl alcohol aqueous solution. Add 6.5g of sodium dodecylbenzenesulfonate, stir evenly to obtain an aqueous phase solution. Mix the prepared water phase solution and oil phase solution while stirring, and stir evenly to obtain the emulsion.

Embodiment 2

[0017] Crush 6.5g of polystyrene foam into granules, wash it, dry it, dissolve it in 7.8g of ethyl acetate, add it into 1.2g of nonionic emulsifier (OP-10) and stir evenly to form an oil phase solution. Add 71.5 g of water to 7.8 g of polyvinyl alcohol, heat it to 90-95° C. under stirring, and keep it warm for 1.5 hours. After it is completely dissolved, stop heating to obtain an aqueous solution of polyvinyl alcohol. Add 0.8 g of sodium dodecylsulfonate and stir evenly to obtain an aqueous phase solution. Add the prepared water phase solution into the oil phase solution under stirring, and stir evenly to obtain the emulsion.

Embodiment 3

[0019] Crush 8.2g polystyrene foam into granules, wash, dry, dissolve in 11.5g ethyl acetate, add non-ionic emulsifier (OP-30) 1.6g and stir evenly to form an oil phase solution. Add 70.2g of water to polyvinyl alcohol, heat to 90-95°C with stirring, and keep warm for 0.5°C. After 5 hours, when it was completely dissolved, the heating was stopped to obtain an aqueous solution of polyvinyl alcohol. Add 1.0 g of α-olefin sulfonate and stir evenly to obtain an aqueous phase solution. Add the above water phase solution into the oil phase solution while stirring, and mix evenly to obtain the emulsion.

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PUM

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Abstract

The present invention discloses an environment-protecting type water-soluble emulsion formed from polyvinyl alcohol, water, polystyrene foam, ethyl acetate, ionic emulsifier and non-ionic emulsifier through the processees of oil phase and water phase treatment and water-oil mixing and stirring. Said emulsion contains no formaldehyde and benzene harmful materials, and is non-toxic and has a certain water-proofing property, can be directly used for bonding wood, also can be made into water paint for internal wall by adding filler and adjuvant, its adhesive strength is greater than 300 kp, and the paint prepared by using said emulsion is soaked in water for 48 hr, it has no peeling, blistering or scaling, can be washed for above 400 times.

Description

technology field; [0001] The invention relates to a water-based emulsion for construction, specifically discloses an environment-friendly water-based emulsion and a preparation method of the emulsion, and belongs to the technical field of environment-friendly building materials. Background technique; [0002] Polyvinyl alcohol (PVA) has been widely used because of its good water solubility, excellent film formation, and low price, but its application range is limited because of its poor water resistance. In order to improve its water resistance, the traditional method is to use formaldehyde, TDI, etc. to modify, and there will be residual toxic organic substances in the solution, which has been difficult to promote because of its toxicity. In addition, waste polystyrene foam has become white garbage, seriously polluting the environment, and it is urgent to find an effective method of recycling. content of the invention; [0003] The invention combines polyvinyl alcohol an...

Claims

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Application Information

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IPC IPC(8): C08J3/05C08L25/06C08L29/04
Inventor 王洪艳盛野李俊峰
Owner 王洪艳
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