CN111804388A - Green dispersion grinding process for vulcanization accelerator DPG - Google Patents
Green dispersion grinding process for vulcanization accelerator DPG Download PDFInfo
- Publication number
- CN111804388A CN111804388A CN202010690820.3A CN202010690820A CN111804388A CN 111804388 A CN111804388 A CN 111804388A CN 202010690820 A CN202010690820 A CN 202010690820A CN 111804388 A CN111804388 A CN 111804388A
- Authority
- CN
- China
- Prior art keywords
- dpg
- grinding
- speed
- vulcanization accelerator
- dispersion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006185 dispersion Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004073 vulcanization Methods 0.000 title claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 4
- 238000013100 final test Methods 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 abstract description 7
- 239000004816 latex Substances 0.000 abstract description 4
- 229920000126 latex Polymers 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical group O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 4
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LCRMGUFGEDUSOG-UHFFFAOYSA-N naphthalen-1-ylsulfonyloxymethyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(OCOS(=O)(=O)C=3C4=CC=CC=C4C=CC=3)=O)=CC=CC2=C1 LCRMGUFGEDUSOG-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/51—Methods thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Crushing And Grinding (AREA)
Abstract
A green dispersion grinding process of a vulcanization accelerator DPG. Belongs to the field of latex industry, and particularly relates to a dispersion grinding process of a vulcanization accelerator DPG. Provides a green dispersion process of a vulcanization accelerator DPG, which is convenient to process and improves the environmental protection property. The invention not only can well disperse DPG in water rapidly and uniformly, but also the product does not contain formaldehyde, and is green and environment-friendly. DPG can be uniformly dispersed, bubbles are not easy to generate under high-speed stirring, and a filter screen of a sand mill cannot be blocked. The use of a horizontal sand mill can improve the grinding efficiency and reduce the particle size of the dispersion. The rotational speed classification grinding is used to avoid the blocking of the screen of the sand mill by the DPG caused by high-speed stirring in the previous period. The invention has convenient operation and high grinding efficiency.
Description
Technical Field
The invention belongs to the field of latex industry, and particularly relates to a dispersion grinding process of a vulcanization accelerator DPG.
Background
The vulcanization accelerator DPG is chemically diphenyl guanidine and is a medium-speed accelerator for natural rubber and synthetic rubber. When used alone, vulcanization starts slowly and is generally used as a second accelerator of thiazole accelerators. When the composition is combined with thiazole accelerant, a large number of polysulfide bonds can be formed, and the hardness and the pressure-variable property of the product can be improved. DPG is generally used as a foam stabilizer in the latex sponge industry, and simultaneously, the hardness and the pressure deformation performance of the product can be improved.
DPG in the current latex bedding industry is generally prepared into a dispersion with solid content of about 50% for use, the used dispersing agent is generally sodium methylene dinaphthalene sulfonate, and the dispersing agent is synthesized from formaldehyde, so that the product has formaldehyde residue and is unsafe and environment-friendly. At present, DPG dispersions are ground by a ball mill at the present stage of the industry, and the grinding mode has the disadvantages of high noise, low grinding efficiency and poor grinding effect.
Disclosure of Invention
Aiming at the problems, the invention provides a green dispersion process of the vulcanization accelerator DPG, which is convenient to process and improves the environmental protection property.
The technical scheme of the invention is as follows: the method comprises the following steps:
s1, stirring and dispersing 100 parts of DPG, 0.5-2 parts of dispersant and 100 parts of water for 10-20min at the rotating speed of 500r/min by using a high-speed stirrer;
then, stirring at a low speed of 150r/min for 20-30 min;
s2, grinding by using a horizontal sand mill, grinding for 10-20min at a rotation speed of 500r/min, then increasing the rotation speed to 700r/min for grinding for 10-20min, and finally increasing the rotation speed to 1200r/min for grinding for 30-90 min;
s3, final testing of the particle size of the dispersion.
In step S1, DPG was a powder having an original molecular particle size D90 of 25 μm.
The dispersant is a nonionic dispersant CF-10, and the solid content is 70%.
The high-speed stirrer is a single-shaft vertical high-speed stirrer.
The invention has the beneficial effects that: the non-ionic dispersing agent CF-10 can well disperse DPG in water quickly and uniformly, and the product does not contain formaldehyde and is green and environment-friendly. The non-ionic dispersing agent CF-10 not only can uniformly disperse DPG, but also is not easy to generate bubbles under high-speed stirring and can not block a filter screen of a sand mill. After the dispersion is stirred at a high speed by using a vertical high-speed stirrer, the air mixed in the dispersion is discharged by stirring at a low speed, so that the viscosity of the dispersion can be effectively reduced. The use of a horizontal sand mill can improve the grinding efficiency and reduce the particle size of the dispersion. The rotational speed classification grinding is used to avoid the blocking of the screen of the sand mill by the DPG caused by high-speed stirring in the previous period.
The invention has convenient operation and high grinding efficiency.
Detailed Description
The invention comprises the following steps:
s1, stirring and dispersing 100 parts of DPG, 0.5-2 parts of dispersant and 100 parts of water for 10-20min at the rotating speed of 500r/min by using a high-speed stirrer to uniformly disperse the DPG, the dispersant and the water;
then, stirring at a low speed of 150r/min for 20-30min to enable bubbles generated by high-speed stirring to slowly escape and reduce the viscosity of the dispersion;
s2, grinding by using a horizontal sand mill, grinding for 10-20min at a rotation speed of 500r/min, then increasing the rotation speed to 700r/min for grinding for 10-20min, and finally increasing the rotation speed to 1200r/min for grinding for 30-90 min;
s3, final testing of the particle size of the dispersion.
In step S1, DPG was a powder having an original molecular particle size D90 of 25 μm.
The dispersant is a nonionic dispersant CF-10, and the solid content is 70%.
The high-speed stirrer is a single-shaft vertical high-speed stirrer.
The horizontal sand mill is of a pin type, and has the following power: 40kw, rotation speed: 500-1200r/min, polishing capability: 2000L/h.
The invention has the beneficial effects that: the non-ionic dispersing agent CF-10 can well disperse DPG in water quickly and uniformly, and the product does not contain formaldehyde and is green and environment-friendly. The non-ionic dispersing agent CF-10 not only can uniformly disperse DPG, but also is not easy to generate bubbles under high-speed stirring and can not block a filter screen of a sand mill. After the dispersion is stirred at a high speed by using a vertical high-speed stirrer, the air mixed in the dispersion is discharged by stirring at a low speed, so that the viscosity of the dispersion can be effectively reduced. The use of a horizontal sand mill can improve the grinding efficiency and reduce the particle size of the dispersion. The rotational speed classification grinding is used to avoid the blocking of the screen of the sand mill by the DPG caused by high-speed stirring in the previous period.
Example 1
200kg of DPG powder, 2kg of dispersing agent and 200kg of water are firstly stirred and dispersed for 10min by a high-speed stirrer at the rotating speed of 500r/min to ensure that the DPG powder, the dispersing agent and the water are uniformly dispersed. Then stirring slowly for 20min at the rotating speed of 150 r/min. Grinding by using a horizontal sand mill, firstly grinding for 10min at a rotating speed of 500r/min, then adjusting the rotating speed to 700r/min for 10min, finally adjusting the rotating speed to 1200r/min for grinding for 30min, and finally testing the particle size of the dispersion: d50 was 8.7 μm and D90 was 19 μm.
Example 2
200kg of DPG powder, 2kg of dispersing agent and 200kg of water are firstly stirred and dispersed for 20min by a high-speed stirrer at the rotating speed of 500r/min to ensure that the DPG powder, the dispersing agent and the water are uniformly dispersed. Then slowly stirring for 30min at the rotating speed of 150 r/min. Grinding by using a horizontal sand mill, firstly grinding for 15min at a rotating speed of 500r/min, then adjusting the rotating speed to 700r/min for grinding for 15min, finally adjusting the rotating speed to 1200r/min for grinding for 50min, and finally testing the particle size of the dispersion: d50 is 6.1 μm and D90 is 12 μm.
Example 3
200kg of DPG powder, 4kg of dispersant and 200kg of water are stirred and dispersed for 20min by a high-speed stirrer at the rotating speed of 500r/min to be uniformly dispersed. Then slowly stirring for 25min at the rotating speed of 150 r/min. Grinding by using a horizontal sand mill, firstly grinding for 10min at a rotating speed of 500r/min, then adjusting the rotating speed to 700r/min for 10min, finally adjusting the rotating speed to 1200r/min for grinding for 30min, and finally testing the particle size of the dispersion: d50 was 7.8 μm and D90 was 17 μm.
Example 4
200kg of DPG powder, 4kg of dispersant and 200kg of water are stirred and dispersed for 20min by a high-speed stirrer at the rotating speed of 500r/min to be uniformly dispersed. Then slowly stirring for 30min at the rotating speed of 150 r/min. Grinding by using a horizontal sand mill, firstly grinding for 20min at a rotating speed of 500r/min, then adjusting the rotating speed to 700r/min for 20min, finally adjusting the rotating speed to 1200r/min for 50min, and finally testing the particle size of the dispersion: d50 was 5.3 μm and D90 was 10 μm.
Claims (4)
1. A green dispersion grinding process of a vulcanization accelerator DPG is characterized by comprising the following steps:
s1, stirring and dispersing 100 parts of DPG, 0.5-2 parts of dispersant and 100 parts of water for 10-20min at the rotating speed of 500r/min by using a high-speed stirrer;
then, stirring at a low speed of 150r/min for 20-30 min;
s2, grinding by using a horizontal sand mill, grinding for 10-20min at a rotation speed of 500r/min, then increasing the rotation speed to 700r/min for grinding for 10-20min, and finally increasing the rotation speed to 1200r/min for grinding for 30-90 min;
s3, final testing of the particle size of the dispersion.
2. The green dispersion grinding process of the vulcanization accelerator DPG, as recited in claim 1, wherein in step S1, DPG is in the form of powder and has a primary molecular particle size D90 of 25 μm.
3. The green dispersion grinding process of the vulcanization accelerator DPG, as recited in claim 1, wherein the dispersant is a non-ionic dispersant CF-10 with a solids content of 70%.
4. The green dispersion grinding process of a vulcanization accelerator DPG according to claim 1, characterized in that the high-speed mixer is a single-shaft vertical high-speed mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690820.3A CN111804388B (en) | 2020-07-17 | 2020-07-17 | Green dispersion grinding process for vulcanization accelerator DPG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690820.3A CN111804388B (en) | 2020-07-17 | 2020-07-17 | Green dispersion grinding process for vulcanization accelerator DPG |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111804388A true CN111804388A (en) | 2020-10-23 |
| CN111804388B CN111804388B (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010690820.3A Active CN111804388B (en) | 2020-07-17 | 2020-07-17 | Green dispersion grinding process for vulcanization accelerator DPG |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111804388B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134549A (en) * | 1961-08-01 | 1964-05-26 | Chicago Boiler Company | Dispersing apparatus |
| CN101722085A (en) * | 2008-10-15 | 2010-06-09 | 许兴康 | Grinding technology of high purity sub-nano level superfine zirconium silicate powder |
| CN206008945U (en) * | 2016-08-29 | 2017-03-15 | 山东英科医疗制品有限公司 | A kind of process units for producing PVC glove oiliness color with horizontal sand mill |
| CN107602994A (en) * | 2017-09-06 | 2018-01-19 | 四川昌晟塬环保科技有限公司 | One kind enhancing unvulcanised thermal weld EPT rubber fire-resistant waterproof coiled material and preparation method thereof |
-
2020
- 2020-07-17 CN CN202010690820.3A patent/CN111804388B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134549A (en) * | 1961-08-01 | 1964-05-26 | Chicago Boiler Company | Dispersing apparatus |
| CN101722085A (en) * | 2008-10-15 | 2010-06-09 | 许兴康 | Grinding technology of high purity sub-nano level superfine zirconium silicate powder |
| CN206008945U (en) * | 2016-08-29 | 2017-03-15 | 山东英科医疗制品有限公司 | A kind of process units for producing PVC glove oiliness color with horizontal sand mill |
| CN107602994A (en) * | 2017-09-06 | 2018-01-19 | 四川昌晟塬环保科技有限公司 | One kind enhancing unvulcanised thermal weld EPT rubber fire-resistant waterproof coiled material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN111804388B (en) | 2021-08-06 |
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Denomination of invention: Green dispersion grinding process of a vulcanization accelerator DPG Granted publication date: 20210806 Pledgee: China Merchants Bank Co.,Ltd. Yangzhou Branch Pledgor: JIANGSU JSY LATEX PRODUCT CO.,LTD. Registration number: Y2024980045035 |