CN104448348A - Concentration method of PTFE emulsion - Google Patents
Concentration method of PTFE emulsion Download PDFInfo
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- CN104448348A CN104448348A CN201410763179.6A CN201410763179A CN104448348A CN 104448348 A CN104448348 A CN 104448348A CN 201410763179 A CN201410763179 A CN 201410763179A CN 104448348 A CN104448348 A CN 104448348A
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- ptfe emulsion
- ptfe
- polyethenoxy ether
- alcohol polyethenoxy
- emulsion
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Abstract
The invention relates to a concentration method of a PTFE emulsion. The method comprises the following steps: heating the PTFE emulsion to the temperature which is 5-15 DEG C lower than a turbidity point of alcohol alkoxylate, adding 2%-10% of alcohol alkoxylate based on the mass of the PTFE emulsion, stirring evenly and then adding 0.1%-1.0% of carbonate based on the mass of the PTFE emulsion; stirring evenly again, and then heating to the turbidity point of the alcohol alkoxylate, standing at a constant temperature for 1-10 hours, and separating supernate, so as to obtain the concentrated PTFE emulsion. The concentration method of the PTFE emulsion provided by the invention has the advantages of environmental friendliness and good concentration effect.
Description
Technical field
The present invention relates to concentration technique field, particularly a kind of concentration method of PTFE emulsion.
Background technology
Polyoxyethylene nonylphenol ether (NPEO) is a kind of nonionogenic tenside of excellent property, is one of tensio-active agent commonly used in textile auxiliary agent.It has the performances such as good decontamination, wetting, solubilising, foaming, dispersion, emulsification, and be easy to very much with the mixing of other tensio-active agents, composite use, compatibleness is better, NPEO is widely used in each industrial circle for a long time, as pretreatment of spinning, dyeing, stamp and Final finishing process, it is the important source material as wetting, infiltration, emulsification, cleaning function auxiliary agent.
The LD of NPEO
50(medium lethal dose) and ECO
50(toxicity of aquatic organism and algae) is lower, not easily degrades in the environment.And in its meta-bolites, the oxygen ethylene metabolism thing toxicity ratio of low EO is comparatively large, and the NP toxicity that final metabolism generates is then larger.The eighties in last century rises, and European Union just starts having harmful substances in textiles and carry out comprehensive research to the impact of human health and environment.The government of some countries and international organizations, from the angle of laws and regulations and standard, adopt various corresponding measure, may all make strict regulation to the ecotope of textiles and product on the impact of human body.
The emulsifying agent major part used in tetrafluoroethylene (PTFE) emulsion concentration process is alkylphenol polyoxyethylene class, and NPEO class substance migration amount is maximum, NPEO brings environmental impact issues because itself is not easily biodegradable, and simultaneously also has carinogenicity, teratogenecity and causes the problem of variability.Along with a lot of country carries out restriction regulation to the use of NPEO, the substitute of seeking a kind of NPEO becomes a kind of trend.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of concentration method of PTFE emulsion of emulsifying agent adopting alternative NPEO, environmental protection.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of concentration method of PTFE emulsion, PTFE emulsion being heated to temperature is 5-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether, add the isomeric alcohol polyethenoxy ether counting 2-10wt% with the quality of PTFE emulsion, the carbonate counting 0.1-1.0wt% with the quality of PTFE emulsion is added after stirring, again stir and temperature be increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 1-10h, is then separated by supernatant liquor, obtains PTFE concentrated emulsion.
Beneficial effect of the present invention is:
(1) adopt isomeric alcohol polyethenoxy ether as nonionogenic tenside, have that emulsifying capacity is strong, surfactivity is high, anti-hard water, chemical stability and the good advantage of Environmental compatibility in wider pH value range; Secondly, the biological degradability of isomeric alcohol polyethenoxy ether is good, has the advantage of environmental protection; Again, in the concentration process of ptfe emulsion, use the concentrated effect of isomeric alcohol polyethenoxy ether emulsifying agent and the effect not second to concentrating with NPEO class emulsifying agent;
(2) arranged by the proportioning of PTFE emulsion, isomeric alcohol polyethenoxy ether and carbonate, twice Heating temperature, the concentrated effect of the PTFE concentrated emulsion of acquisition is greatly improved.
Embodiment
By describing technology contents of the present invention in detail, being realized object and effect, be explained below in conjunction with embodiment.
The design of most critical of the present invention is: adopt isomeric alcohol polyethenoxy ether to substitute NPEO class emulsifying agent, has both avoided NPEO class emulsifying agent environment to be produced to the concentrated effect polluting and ensure PTFE emulsion simultaneously.
The invention provides a kind of concentration method of PTFE emulsion, PTFE emulsion being heated to temperature is 5-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether, add the isomeric alcohol polyethenoxy ether counting 2-10wt% with the quality of PTFE emulsion, the carbonate counting 0.1-1.0wt% with the quality of PTFE emulsion is added after stirring, again stir and temperature be increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 1-10h, is then separated by supernatant liquor, obtains PTFE concentrated emulsion.
Principle of work of the present invention is: isomeric alcohol polyethenoxy ether is combined when first time heats as emulsifying agent and PTFE-ammonium perfluorocaprylate micella and forms new micella, new micella and water form hydrogen bond, separate when reaching hydrogen bond rupture aqueous phase and micella when second time is heated to cloud point, micella gravity is large and sink, water gravity is little on upper strata, thus reaches concentrated effect.Simultaneously, after adding carbonate, carbonate and isomeric alcohol polyethenoxy ether emulsifying agent carry out composite use, existence due to carbonate is unfavorable for forming hydrogen bond between Soxylat A 25-7 and water in nonionogenic tenside thus causing dehydrating phenomena, to reduce solubleness and the cloud point of isomery alcohol ether Soxylat A 25-7, thus shorten concentration time.
From foregoing description, beneficial effect of the present invention is:
(1) adopt isomeric alcohol polyethenoxy ether as nonionogenic tenside, have that emulsifying capacity is strong, surfactivity is high, anti-hard water, chemical stability and the good advantage of Environmental compatibility in wider pH value range; Secondly, the biological degradability of isomeric alcohol polyethenoxy ether is good, has the advantage of environmental protection; Again, in the concentration process of ptfe emulsion, use the concentrated effect of isomeric alcohol polyethenoxy ether emulsifying agent and the effect not second to concentrating with NPEO class emulsifying agent;
(2) arranged by the proportioning of PTFE emulsion, isomeric alcohol polyethenoxy ether and carbonate, twice Heating temperature, the concentrated effect of the PTFE concentrated emulsion of acquisition is greatly improved.
Further, the proportion of described PTFE concentrated emulsion is 1.49-1.52.
Seen from the above description, the concentration method of the PTFE emulsion of the present embodiment regulates its proportion, the PTFE concentrated emulsion of preparation can be regulated according to the needs of different solid contents, thus meet the different needs.
Further, described isomeric alcohol polyethenoxy ether is isomerous tridecanol polyoxyethylene ether, and described carbonate is volatile salt or bicarbonate of ammonia.
Further, after adding carbonate, adopt and stir the cloud point that temperature is increased to isomeric alcohol polyethenoxy ether by the mode heated up.
Seen from the above description, adopt and stir the mode heated up and can improve concentrated effect.
Further, PTFE emulsion being heated to temperature is 8-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether.
Seen from the above description, the present embodiment is preferred embodiment, and the temperature that PTFE emulsion is heated to of the present embodiment is 8-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether, makes the PTFE concentrated emulsion of acquisition have good concentrated effect.
Further, the speed of described stirring is 15-35rpm.
Further, the time that described constant temperature leaves standstill is 3-6h.
Embodiments of the invention one are:
In the beaker of 1000mL, add the PTFE emulsion of 700g, by heating in water bath to 55 DEG C, add the isomerous tridecanol polyoxyethylene ether 1309 of 35g, after stirring, add the bicarbonate of ammonia of 0.52g, stir, be warming up to 63 DEG C, stop stirring, be incubated 3 hours, layering, cooling, supernatant liquor is taken away, obtains PTFE concentrated emulsion, regulate proportion to 1.50 ~ 1.51 of PTFE concentrated emulsion.
Embodiments of the invention two are:
In the beaker of 1000mL, add the PTFE emulsion of 700g, by heating in water bath to 55 DEG C, add the isomerous tridecanol polyoxyethylene ether 1309 of 42g, after stirring, add the volatile salt of 0.52g, stir, be warming up to 63 DEG C, stop stirring, be incubated 3 hours, layering, cooling, supernatant liquor is taken away, obtains PTFE concentrated emulsion, regulate proportion to 1.50 ~ 1.51 of PTFE concentrated emulsion.
Embodiments of the invention three are:
In the beaker of 1000mL, add the PTFE emulsion of 700g, by heating in water bath to 65 DEG C, add the isomerous tridecanol polyoxyethylene ether 1310 of 42g, after stirring, add the bicarbonate of ammonia of 0.52g, stir, be warming up to 71 DEG C, stop stirring, be incubated 3 hours, layering, cooling, supernatant liquor is taken away, obtains PTFE concentrated emulsion, regulate proportion to 1.50 ~ 1.51 of PTFE concentrated emulsion.
Embodiments of the invention four are:
It is lower than the cloud point of isomeric alcohol polyethenoxy ether 5 DEG C for PTFE emulsion being heated to temperature, add the isomeric alcohol polyethenoxy ether counting 2% with the quality of PTFE emulsion, the carbonate counting 0.1% with the quality of PTFE emulsion is added after stirring, after again stirring, temperature is increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 1h, then supernatant liquor is separated, obtains PTFE concentrated emulsion.
Embodiments of the invention five are:
It is lower than the cloud point of isomeric alcohol polyethenoxy ether 15 DEG C for PTFE emulsion being heated to temperature, add the isomeric alcohol polyethenoxy ether counting 10% with the quality of PTFE emulsion, the carbonate counting 1.0% with the quality of PTFE emulsion is added after stirring, after again stirring, temperature is increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 10h, then supernatant liquor is separated, obtains PTFE concentrated emulsion.
Embodiments of the invention six are:
It is lower than the cloud point of isomeric alcohol polyethenoxy ether 10 DEG C for PTFE emulsion being heated to temperature, add the isomeric alcohol polyethenoxy ether counting 7% with the quality of PTFE emulsion, the carbonate counting 0.5% with the quality of PTFE emulsion is added after stirring, after again stirring, temperature is increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 5h, then supernatant liquor is separated, obtains PTFE concentrated emulsion.
In sum, the concentration method of PTFE emulsion provided by the invention has environmental protection, advantage that concentrated effect is good.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing description of the present invention to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. the concentration method of a PTFE emulsion, it is characterized in that, PTFE emulsion being heated to temperature is 5-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether, add the isomeric alcohol polyethenoxy ether counting 2-10wt% with the quality of PTFE emulsion, add the carbonate counting 0.1-1.0wt% with the quality of PTFE emulsion after stirring, again stir and temperature be increased to the cloud point of isomeric alcohol polyethenoxy ether, constant temperature leaves standstill 1-10h, then supernatant liquor is separated, obtains PTFE concentrated emulsion.
2. the concentration method of PTFE emulsion according to claim 1, is characterized in that, the proportion of described PTFE concentrated emulsion is 1.49-1.52.
3. the concentration method of PTFE emulsion according to claim 1, is characterized in that, described isomeric alcohol polyethenoxy ether is isomerous tridecanol polyoxyethylene ether, and described carbonate is volatile salt or bicarbonate of ammonia.
4. the concentration method of PTFE emulsion according to claim 1, is characterized in that, after adding carbonate, adopts and stirs the cloud point that temperature is increased to isomeric alcohol polyethenoxy ether by the mode heated up.
5. the concentration method of PTFE emulsion according to claim 1, is characterized in that, PTFE emulsion being heated to temperature is 8-15 DEG C lower than the cloud point of isomeric alcohol polyethenoxy ether.
6. the concentration method of PTFE emulsion according to claim 1, is characterized in that, the speed of described stirring is 15-35rpm.
7. the concentration method of PTFE emulsion according to claim 1, is characterized in that, the time that described constant temperature leaves standstill is 3-6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763179.6A CN104448348A (en) | 2014-12-11 | 2014-12-11 | Concentration method of PTFE emulsion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763179.6A CN104448348A (en) | 2014-12-11 | 2014-12-11 | Concentration method of PTFE emulsion |
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| CN104448348A true CN104448348A (en) | 2015-03-25 |
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| CN201410763179.6A Pending CN104448348A (en) | 2014-12-11 | 2014-12-11 | Concentration method of PTFE emulsion |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882617A (en) * | 2003-11-17 | 2006-12-20 | 3M创新有限公司 | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant |
| CN1880347A (en) * | 2005-04-20 | 2006-12-20 | 索尔维索莱克西斯公司 | Process for preparing fluoropolymer dispersions |
-
2014
- 2014-12-11 CN CN201410763179.6A patent/CN104448348A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882617A (en) * | 2003-11-17 | 2006-12-20 | 3M创新有限公司 | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant |
| CN1880347A (en) * | 2005-04-20 | 2006-12-20 | 索尔维索莱克西斯公司 | Process for preparing fluoropolymer dispersions |
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Application publication date: 20150325 |
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