CN104193854A - Fluororubber preparation method - Google Patents
Fluororubber preparation method Download PDFInfo
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- CN104193854A CN104193854A CN201410503404.2A CN201410503404A CN104193854A CN 104193854 A CN104193854 A CN 104193854A CN 201410503404 A CN201410503404 A CN 201410503404A CN 104193854 A CN104193854 A CN 104193854A
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Abstract
The invention discloses a fluororubber preparation method. The method comprises the following steps: step 1, adding 0.02%-4% of an emulsifying agent and 0.02%-3.8% of a pH conditioning agent into 100 parts of aqueous medium in mass ratio; step 2, adding a polymerization monomer into the mixture prepared in the step 1 and adding 0.002%-2.5% of an initiator to start polymerization reaction; step 3, after the added polymerization monomer accounts for 25%-65% of the total weight of the mixture, adding 0.002%-3% of a chain transfer agent; step 4, continuously adding the rest polymerization monomers into the mixture prepared in the step 3 and controlling the reaction pressure to be 2.5-5 Mpa and the reaction temperature to be 55-115 DEG C; step 5, after the reaction finishes, performing agglomeration, washing and drying on the prepared polymerization emulsion, and finally, obtaining the fluororubber through plastication formation. The fluororubber preparation method provided by the invention is simple to operate, mild in reaction conditions and stable in production performance, has better vulcanization performance and good oil resistance and can be applied to various industrial fields.
Description
Technical field
The invention belongs to elastomeric technical field, be specifically related to a kind of preparation method of viton.
Background technology
Viton is the synthetic rubber that contains fluorine atom, and the characteristic that viton has is high temperature resistant, oil resistant and the medicine of resistance to number of chemical corrode, is the indispensable materials of top science technology such as modern Aviation, guided missile, rocket, space travel.Along with the continuous lifting that automotive industry requires reliability, security etc., the consumption of viton in automobile also increases rapidly.
Viton be the earliest U.S. DuPont company in 1948 manufacture experimently out poly--2-fluoro-1.3-divinyl and with the interpolymer of vinylbenzene, propylene etc., but performance is outstanding unlike chloroprene rubber, paracril etc., and expensive, there is no actual industrial value.In the later stage fifties, it is good that U.S. Thiokol company has developed a kind of low temperature properties, the binary nitroso-fluoro-elastomers of powerful oxidation corrosion resistance agent (N2O4), and viton starts to enter practical application in industry.After this, along with technical progress, various novel type fluorubbers are continually developed out.
China also developed multiple viton since 1958, was mainly polyolefins viton, as 23 types, 26 types, 246 types and nitrosofluoro rubber; Develop again subsequently 4 third viton, perfluoroelastomers compared with new variety, fluoridized phosphorus rubber.First these viton kinds all set out with the supporting needs of the defence and militaries such as Aeronautics and Astronautics, progressively promote the use of civilian industry department.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of preparation method of viton.Viton preparation method provided by the invention is simple to operate, reaction conditions is gentle, and product performance are stable, have good curability and good oil resistance, can be applied to multiple industrial circle.
To achieve these goals, the present invention realizes by the following technical solutions:
A preparation method for viton, comprises the steps:
Step 1: add in mass ratio 0.02%～4% emulsifying agent and 0.02%～3.8% pH conditioning agent in the water medium of every 100 parts;
Step 2: add polymerization single polymerization monomer in the compound of preparing in described step 1, and add 0.002%～2.5% initiator to start polyreaction;
Step 3: be its gross weight in the add-on of described polymerization single polymerization monomer after 25%～65%, then add 0.002 %～3 % chain-transfer agent;
Step 4: continue to add remaining polymerization single polymerization monomer in the compound of preparing in described step 3, and make reaction pressure be controlled at 2.5～5Mpa, temperature of reaction is 55～115 ℃;
Step 5: after completion of the reaction gained polymerized emulsion condensed, wash, be dried, obtain described viton finally by the moulding of plasticating.
Described pH conditioning agent is sodium hydroxide or hydrochloric acid.
Described emulsifying agent is sorbitol fatty acid ester.
Compared with prior art, the present invention has following beneficial effect:
Viton synthetic method provided by the invention is simple to operate, reaction conditions is gentle, and product performance are stable, have good curability and good oil resistance, can be applied to multiple industrial circle.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
embodiment 1
A preparation method for viton, comprises the steps:
Step 1: add in mass ratio 4% emulsifying agent and 3.8% pH conditioning agent in the water medium of every 100 parts;
Step 2: add polymerization single polymerization monomer in the compound of preparing in described step 1, and add 0.002% initiator to start polyreaction;
Step 3: be its gross weight in the add-on of described polymerization single polymerization monomer after 25%～65%, then add 3 % chain-transfer agents;
Step 4: continue to add remaining polymerization single polymerization monomer in the compound of preparing in described step 3, and make reaction pressure be controlled at 2.5Mpa, temperature of reaction is 55 ℃;
Step 5: after completion of the reaction gained polymerized emulsion condensed, wash, be dried, obtain described viton finally by the moulding of plasticating.
Embodiment 2
A preparation method for viton, comprises the steps:
Step 1: add in mass ratio 1% emulsifying agent and 2% pH conditioning agent in the water medium of every 100 parts;
Step 2: add polymerization single polymerization monomer in the compound of preparing in described step 1, and add 2.1% initiator to start polyreaction;
Step 3: be its gross weight in the add-on of described polymerization single polymerization monomer after 5065%, then add 1 % chain-transfer agent;
Step 4: continue to add remaining polymerization single polymerization monomer in the compound of preparing in described step 3, and make reaction pressure be controlled at 3Mpa, temperature of reaction is 100 ℃;
Step 5: after completion of the reaction gained polymerized emulsion condensed, wash, be dried, obtain described viton finally by the moulding of plasticating.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. a preparation method for viton, is characterized in that, comprises the steps:
Step 1: add in mass ratio 0.02%～4% emulsifying agent and 0.02%～3.8% pH conditioning agent in the water medium of every 100 parts;
Step 2: add polymerization single polymerization monomer in the compound of preparing in described step 1, and add 0.002%～2.5% initiator to start polyreaction;
Step 3: be its gross weight in the add-on of described polymerization single polymerization monomer after 25%～65%, then add 0.002 %～3 % chain-transfer agent;
Step 4: continue to add remaining polymerization single polymerization monomer in the compound of preparing in described step 3, and make reaction pressure be controlled at 2.5～5Mpa, temperature of reaction is 55～115 ℃;
Step 5: after completion of the reaction gained polymerized emulsion condensed, wash, be dried, obtain described viton finally by the moulding of plasticating.
2. the preparation method of a kind of viton as claimed in claim 1, is characterized in that, described pH conditioning agent is sodium hydroxide or hydrochloric acid.
3. the preparation method of a kind of viton as claimed in claim 2, is characterized in that, described emulsifying agent is sorbitol fatty acid ester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503404.2A CN104193854A (en) | 2014-09-28 | 2014-09-28 | Fluororubber preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503404.2A CN104193854A (en) | 2014-09-28 | 2014-09-28 | Fluororubber preparation method |
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| CN104193854A true CN104193854A (en) | 2014-12-10 |
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| CN201410503404.2A Pending CN104193854A (en) | 2014-09-28 | 2014-09-28 | Fluororubber preparation method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443090A (en) * | 2011-10-25 | 2012-05-09 | 中昊晨光化工研究院 | Synthetic method for fluororubber |
| CN103709304A (en) * | 2013-12-26 | 2014-04-09 | 中昊晨光化工研究院有限公司 | Preparation method of high-strength fluorine-containing polymer |
| CN103833874A (en) * | 2014-03-07 | 2014-06-04 | 中昊晨光化工研究院有限公司 | Fluororubber and synthesis method thereof |
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2014
- 2014-09-28 CN CN201410503404.2A patent/CN104193854A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443090A (en) * | 2011-10-25 | 2012-05-09 | 中昊晨光化工研究院 | Synthetic method for fluororubber |
| CN103709304A (en) * | 2013-12-26 | 2014-04-09 | 中昊晨光化工研究院有限公司 | Preparation method of high-strength fluorine-containing polymer |
| CN103833874A (en) * | 2014-03-07 | 2014-06-04 | 中昊晨光化工研究院有限公司 | Fluororubber and synthesis method thereof |
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Application publication date: 20141210 |