CN102850493A - Method for preparing styrene-acrylic emulsion by using waste EPS foam - Google Patents
Method for preparing styrene-acrylic emulsion by using waste EPS foam Download PDFInfo
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- CN102850493A CN102850493A CN2012103405284A CN201210340528A CN102850493A CN 102850493 A CN102850493 A CN 102850493A CN 2012103405284 A CN2012103405284 A CN 2012103405284A CN 201210340528 A CN201210340528 A CN 201210340528A CN 102850493 A CN102850493 A CN 102850493A
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Abstract
The invention relates to a method for preparing styrene-acrylic emulsion by using waste EPS foam. The method comprises the steps of: EPS foam dissolving and dispersion, pre-emulsion preparation, and styrene-acrylic emulsion preparation. Compared with prior arts, the method provided by the invention has the advantages that: 1, waste EPS foam is adopted as one of the main raw materials, such that cost is greatly reduced, waste recycling is realized, and environment pollution is reduced; and 2, dissolved waste EPS foam is dispersed by using an ultrasonic dispersion technology, such that EPS foam agglomeration is prevented during dissolving, and non-uniform dispersion is prevented.
Description
Technical field
The present invention relates to a kind of method of utilizing the waste EPS foam to prepare benzene emulsion.
Technical background
Benzene emulsion is the emulsion by monomer copolymerizations such as vinylbenzene, esters of acrylic acids.Coating take benzene emulsion as main film forming substance, have the various stability such as good thermotolerance, tint retention, erosion resistance, and nontoxic, pollution-free, be a kind of environment-friendly type coating, more and more being subjected to the welcome in market, also is the focus of in recent years environmental protection class coating research.Along with the development of society, benzene emulsion development in the world is more and more faster,, particularly in the development of the U.S., Japan, European Union to a very ripe stage, development at home also begins to become to reach its maturity.Benzene emulsion has very widely purposes as the important middle Chemicals of a class, and is existing main as building coating, metallic surface latex coating, floor coating, paper tackiness agent, glue paste etc., and very large practical value is arranged.
Common benzene emulsion sexuality be mainly reflected in outward appearance, viscosity, pH value, solid content, Calcium ion stability, mechanical stability, dilution stability, vitrification point and minimum film forming stable etc. on.So the preparation benzene emulsion must satisfy above performance index.The method of traditional preparation is to adopt chemical pure function monomer (St, BA, AA, MMA) by emulsifying agent emulsification, add again and make about initiator, buffer reagent etc. polyase 13 h, the method at home, outer substantially ripe, how focus has turned to the modification of carrying out to benzene emulsion at present.
But, along with not only improving of society, energy-conserving and environment-protective, the waste recycling has become the hot issue of society.Solving at present white pollution (for example: plastics, film, discarded eps foam etc.) also is a great problem.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of utilizing the waste EPS foam to prepare benzene emulsion for above-mentioned prior art, realizes the industrialized utilization of waste EPS foam, reduces simultaneously discarded eps foam environmental pollution.
The technical scheme that the present invention addresses the above problem employing is: utilize the waste EPS foam to prepare the method for benzene emulsion, it is characterized in that including following steps:
1) dissolving of eps foam, dispersion
Take by weighing the waste EPS foam of 10～45 weight parts, put into beaker, then take by weighing solvating agent and pour beaker into, sealing with ultrasonic wave separating apparatus dispersion and stir, makes waste EPS foam uniform dissolution, obtains monomer mixed solution;
2) preparation of pre-emulsion
Distilled water 110～130 weight parts, emulsifying agent 2～5 weight parts are joined there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and turn on agitator stirs 20min, its stirring velocity is 200～250r/min, emulsifying agent is fully dissolved, then with step 1) monomer mixed solution that obtains all joins in 5min in the there-necked flask, and insulation 30min obtains pre-emulsion for subsequent use;
3) preparation of benzene emulsion
Take by weighing 0.1～0.6 weight part initiator, 0.1～0.6 weight part buffer reagent, dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then getting respectively 1/2 pre-emulsion and 1/2 initiator solution joins in the four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing namely gets benzene emulsion.
Press such scheme, described solvating agent is St (vinylbenzene), BA (butyl acrylate), the mixture of AA (phenylformic acid) and MMA (methyl methacrylate), wherein the proportioning of each component is counted by weight: St 45～10, BA 45～55, and AA 2～5, and MMA 5～8.
Press such scheme, described emulsifying agent is the mixing of any one or they in polyethylene oxide class nonionogenic tenside and the alkyls aniorfic surfactant.
Press such scheme, described polyethylene oxide class nonionogenic tenside is OP-10, polyoxyethylene nonylphenol ether or polyoxyethylene fatty acid ester.
Press such scheme, described alkyls aniorfic surfactant comprises: sodium lauryl sulphate, Sodium dodecylbenzene sulfonate or calcium dodecylbenzene sulphonate.
Press such scheme, described initiator is ammonium persulphate, BP or Potassium Persulphate.
Press such scheme, described buffer reagent is sodium bicarbonate, ammoniacal liquor or sodium hydroxide.
The present invention adopts discarded eps foam as one of main raw material of synthetic styrene-acrylic emulsion, traditional synthetic method is improved, eps foam after adopting the ultrasonic wave separating apparatus to dissolving disperses, meet the requirements of granularity, then the benzene emulsion that meets the demands by emulsification, polymerization preparation has well solved the white pollution problems that is caused by discarded eps foam.
Discarded eps foam is to be formed by granules of polystyrene extrusion molding under certain pressure, can be dissolved in the organic solvents such as vinylbenzene, butyl acrylate, methyl methacrylate, and the main component after the dissolving is polystyrene.And benzene emulsion is the emulsion by monomer copolymerizations such as vinylbenzene, esters of acrylic acids.Therefore, waste EPS foam energy and butyl acrylate after the dissolving, methyl methacrylate produces polyreaction, the preparation benzene emulsion.
The present invention compares maximum advantage and is with existing technology:
1. adopt discarded eps foam as one of main raw material, reduced greatly cost, and realized the waste recycling, reduced the pollution to environment;
2. adopt the ultrasonic wave dispersion technology that the waste EPS foam of dissolving is disperseed, eps foam produces and reunites when avoiding dissolving, can not Uniform Dispersion.
Embodiment
The invention will be further described below in conjunction with embodiment, but not only be confined to the following examples.
Embodiment 1:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 10g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:45g, 45g, 2g, 5g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 110g distilled water, 2g emulsifying agent (sodium lauryl sulphate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (ammonium persulphate) of 0.1g, 0.1g buffer reagent (ammoniacal liquor), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively 1/2 pre-emulsion and 1/2 initiator solution and join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Embodiment 2:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 45g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:10g, 55g, 5g, 8g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 130g distilled water, 5g emulsifying agent (each 2.5g of OP-10 and sodium lauryl sulphate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (Potassium Persulphate) of 0.6g, 0.6g buffer reagent (sodium bicarbonate), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively and 1/2 pre-emulsion and 1/2 initiator solution, join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Embodiment 3:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 20g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:35g, 48g, 3g, 6g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 120g distilled water, 3g emulsifying agent (Sodium dodecylbenzene sulfonate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (BP) of 0.3g, 0.3g buffer reagent (sodium hydroxide), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively and 1/2 pre-emulsion and 1/2 initiator solution, join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Embodiment 4:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 30g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:25g, 52g, 4g, 7g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 125g distilled water, 4g emulsifying agent (each 2g of polyoxyethylene nonylphenol ether and Sodium dodecylbenzene sulfonate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (ammonium persulphate) of 0.5g, 0.5g buffer reagent (sodium bicarbonate), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively and 1/2 pre-emulsion and 1/2 initiator solution, join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Embodiment 5:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 40g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:15g, 50g, 3g, 7g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 130g distilled water, 5g emulsifying agent (each 2.5g of polyoxyethylene fatty acid ester and Sodium dodecylbenzene sulfonate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (ammonium persulphate) of 0.4g, 0.2g buffer reagent (ammoniacal liquor), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively and 1/2 pre-emulsion and 1/2 initiator solution, join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Embodiment 6:
Fill a prescription following (weight part meter/g):
Take by weighing the waste EPS foam of 25g, put into beaker, then take by weighing solvating agent St, BA, AA, MMA:30g, 45g, 4g, 6g pours beaker into, with beaker mouth sealing 30min, with the dispersion of ultrasonic wave separating apparatus and stir, makes its eps foam uniform dissolution.Because the liquid viscosity after the dissolving is larger, connect between the particle closely, will dissolve uniform liquid and put into the microwave separating apparatus and disperse 30min, take out for subsequent use.
Take by weighing 120g distilled water, 5g emulsifying agent (each 2.5g of OP-10 and calcium dodecylbenzene sulphonate) joins there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and the beginning agitator stirs, and (stirring velocity is 200～250r/min), emulsifying agent is fully dissolved, then the monomer after will dissolving, disperseing all adds, insulation 30min obtains pre-emulsion for subsequent use.
Take by weighing the initiator (Potassium Persulphate) of 0.2g, 0.4g buffer reagent (sodium bicarbonate), dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then get respectively and 1/2 pre-emulsion and 1/2 initiator solution, join four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting pH value is 7～9, cooling, blowing.The benzene emulsion performance of preparation is as shown in table 1.
Table 1: the performance of preparation benzene emulsion
Claims (7)
1. utilize the waste EPS foam to prepare the method for benzene emulsion, it is characterized in that including following steps:
1) dissolving of eps foam, dispersion
Take by weighing the waste EPS foam of 10～45 weight parts, put into beaker, then take by weighing solvating agent and pour beaker into, sealing with ultrasonic wave separating apparatus dispersion and stir, makes waste EPS foam uniform dissolution, obtains monomer mixed solution;
2) preparation of pre-emulsion
Distilled water 110～130 weight parts, emulsifying agent 2～5 weight parts are joined there-necked flask, opening electric mantle control temperature is 45 ± 2 ℃, and turn on agitator stirs 20min, its stirring velocity is 200～250r/min, emulsifying agent is fully dissolved, then with step 1) monomer mixed solution that obtains all joins in 5min in the there-necked flask, and insulation 30min obtains pre-emulsion for subsequent use;
3) preparation of benzene emulsion
Take by weighing 0.1～0.6 weight part initiator, 0.1～0.6 weight part buffer reagent, dilute respectively 15～20 times and be mixed with initiator solution and buffer agent solution, then getting respectively 1/2 pre-emulsion and 1/2 initiator solution joins in the four-hole boiling flask, the temperature to 80 of adjustment heating jacket ± 2 ℃, the stirring velocity of agitator is 250～300r/min, continues 30min, begin to drip remaining pre-emulsion, and interval 20min, the initiator solution of adding 1/6 treats that pre-emulsion drips off, add remaining initiator solution, continue reaction 2h, cool to 30 ± 2 ℃, drip buffer agent solution, adjusting the pH value is 7～9, cooling, blowing namely gets benzene emulsion.
2. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 1 is characterized in that described solvating agent is St, BA, the mixture of AA and MMA, wherein the proportioning of each component is counted by weight: St 45～10, and BA 45～55, AA 2～5, and MMA 5～8.
3. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 1 and 2 is characterized in that described emulsifying agent is the mixing of any one or they in polyethylene oxide class nonionogenic tenside and the alkyls aniorfic surfactant.
4. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 3 is characterized in that described polyethylene oxide class nonionogenic tenside is OP-10, polyoxyethylene nonylphenol ether or polyoxyethylene fatty acid ester.
5. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 3 is characterized in that described alkyls aniorfic surfactant comprises: sodium lauryl sulphate, Sodium dodecylbenzene sulfonate or calcium dodecylbenzene sulphonate.
6. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 1 and 2 is characterized in that described initiator is ammonium persulphate, BP or Potassium Persulphate.
7. the method for utilizing the waste EPS foam to prepare benzene emulsion according to claim 1 and 2 is characterized in that described buffer reagent is sodium bicarbonate, ammoniacal liquor or sodium hydroxide.
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| CN201210340528.4A CN102850493B (en) | 2012-09-14 | 2012-09-14 | Method for preparing styrene-acrylic emulsion by using waste EPS foam |
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| CN201210340528.4A CN102850493B (en) | 2012-09-14 | 2012-09-14 | Method for preparing styrene-acrylic emulsion by using waste EPS foam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014104155A1 (en) | 2014-03-26 | 2015-10-01 | Zhen Chen | Device and method for removing a deposit applied to a rigid foam board |
| CN111072859A (en) * | 2020-01-10 | 2020-04-28 | 吴慧华 | Emulsion prepared by graft copolymerization modification of waste polystyrene by using butyl acrylate and acrylic acid monomer and synthesis method thereof |
| CN113897014A (en) * | 2020-06-22 | 2022-01-07 | 宝武炭材料科技有限公司 | Preparation method of water-based coumarone resin emulsion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215067A (en) * | 1997-10-20 | 1999-04-28 | 湖北大学 | Preparation of benzene propyl emulsion from waste polystrene foamed plastics |
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2012
- 2012-09-14 CN CN201210340528.4A patent/CN102850493B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215067A (en) * | 1997-10-20 | 1999-04-28 | 湖北大学 | Preparation of benzene propyl emulsion from waste polystrene foamed plastics |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014104155A1 (en) | 2014-03-26 | 2015-10-01 | Zhen Chen | Device and method for removing a deposit applied to a rigid foam board |
| CN111072859A (en) * | 2020-01-10 | 2020-04-28 | 吴慧华 | Emulsion prepared by graft copolymerization modification of waste polystyrene by using butyl acrylate and acrylic acid monomer and synthesis method thereof |
| CN113897014A (en) * | 2020-06-22 | 2022-01-07 | 宝武炭材料科技有限公司 | Preparation method of water-based coumarone resin emulsion |
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