CN115160497A - Method for directly using tap water in production of emulsion polymerized styrene butadiene rubber - Google Patents
Method for directly using tap water in production of emulsion polymerized styrene butadiene rubber Download PDFInfo
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- CN115160497A CN115160497A CN202211026330.9A CN202211026330A CN115160497A CN 115160497 A CN115160497 A CN 115160497A CN 202211026330 A CN202211026330 A CN 202211026330A CN 115160497 A CN115160497 A CN 115160497A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
Abstract
The invention provides a method for directly using tap water in the production of emulsion polymerization butadiene styrene rubber, which thoroughly cancels a deionized water device, simplifies the process flow and operation, reduces the investment cost and the occupied area of the device, improves the utilization rate of water resources and reduces the production cost of the butadiene styrene rubber. The method for directly using tap water in the production of emulsion polymerized styrene butadiene rubber uses tap water to prepare soap solution, deoxidant, activator and terminator; adding complexing agent EDTANA during the preparation of soap solution 2 ·2H 2 O; after the soap solution is qualified, the soap solution is mixed with tap water, monomers and other materials on line through a metering control system and enters an emulsion polymerization system. The invention utilizes the complexation process to synthesizeThe polyvalent metal ion in the water is EDTANA 2 ·2H 2 The O chelating agent is used for complexing to form a stable water-soluble complex which is discharged along with wastewater in the processes of coagulation and dehydration, and does not influence emulsion polymerization, latex stability and rubber physical properties.
Description
Technical Field
The invention relates to a production technology of emulsion polymerized styrene-butadiene rubber, in particular to a method for directly using tap water for producing emulsion polymerized styrene-butadiene rubber.
Background
Emulsion polymerized styrene butadiene rubber (ESBR) is a copolymer rubber of butadiene and styrene in an emulsion system, is a rubber variety with the largest production specification, the largest variety number and the widest applicability in synthetic rubber, and is widely applied to manufacturing tires and other various rubber products. In the emulsion polymerization styrene butadiene rubber process, monomer butadiene and styrene are subjected to free radical polymerization under the action of an initiator by taking mixed soap as an emulsifier and water as a dispersion medium, and when the conversion rate reaches about 70 percent, a terminator is added to prepare styrene butadiene rubber latex, and then styrene butadiene rubber products are prepared through the processes of coagulation, dehydration, drying and the like. Wherein the dosage of the dispersion medium water is 170-200PHR (parts by mass), which provides a low-viscosity medium and a multiphase reaction site, and is beneficial to the heat transfer and temperature control of emulsion polymerization, so that the emulsion polymerization has the advantages of high polymerization speed, low viscosity, stable reaction and large polymer molecular weight.
Since the common water source contains Ca 2+ 、Mg 2+ 、Mn 2+ 、Fe 3+ 、Fe 2+ 、Zn 2+ 、Cu 2+ The polyvalent metal ions, which can be combined with the anions of fatty acid soap and disproportionated rosin acid soap to form calcium salt, magnesium salt and other precipitates, have different degrees of influence on emulsion polymerization, latex stability and rubber properties, and cannot be directly used in the emulsion polymerization process. Therefore, at present, emulsion polymerization styrene butadiene rubber production enterprises at home and abroad adopt methods such as ion exchange resin or RO reverse osmosis, and common water sources are prepared into deionized water (commonly called as desalted water or soft water) which is then used for emulsion polymerization process.
The deionized water method for producing the emulsion polymerized styrene butadiene rubber has the following defects and shortcomings:
1) The investment cost is high: in the existing emulsion polymerized styrene butadiene rubber production technology in the industry, the water quality of a common water source cannot meet the polymerization requirement, a deionized water device needs to be additionally arranged, and the process flow is complicated. According to a 10 ten thousand ton/year emulsion polymerized styrene butadiene rubber device, the water production capacity of deionized water needs more than 90 tons/hour, the equipment investment cost exceeds more than 500 ten thousand, and the occupied area is increased.
2) Water resource waste: if deionized water is prepared by adopting an ion exchange resin method, the water utilization rate is about 96-98%; if a reverse osmosis membrane method is adopted, the water utilization rate is about 80%, water resource waste is caused, and the wastewater treatment capacity generated by regeneration or backwashing is increased.
3) The process flow and operation are complicated: because a set of deionized water preparation device is added, the production process of the styrene butadiene rubber is complicated, the operation is complicated, and the operating personnel and the management cost of the deionized water device are increased.
4) The production cost is high: the running cost of the deionized water device comprises electric charge, water charge, medicament charge, artificial wages, management charge, maintenance charge, equipment depreciation charge and the like, if the ion exchange resin method water is adopted, the water production cost is about 3 yuan/ton (not including the cost of tap water), and the annual water production cost is 79.5 yuan (calculated according to a 10 million ton/annual styrene butadiene rubber device); if the reverse osmosis membrane method is adopted, the water production cost is about 5 yuan/ton (not including the cost of tap water), and the annual water production cost is 132.5 ten thousand yuan. In addition, the replacement cost of the anion-cation resin or the reverse osmosis membrane and the replacement cost of the multi-medium filter filler can be increased regularly, and a large amount of dangerous waste is generated, so that the production cost of the styrene butadiene rubber is increased.
Disclosure of Invention
In order to overcome the problems in the prior art, the application provides a method for directly using tap water for producing emulsion polymerization styrene butadiene rubber, which thoroughly cancels a deionized water device, simplifies the process flow and operation, reduces the equipment investment cost and the occupied area, improves the utilization rate of water resources and reduces the production cost of styrene butadiene rubber.
The technical scheme of the invention is as follows:
tap water is directly used for producing emulsion polymerized styrene butadiene rubber, and the method uses the tap water to prepare soap solution, deoxidant, activator and terminator; adding complexing agent EDTANa in the soap liquid preparation process 2 ·2H 2 O; after the soap solution is qualified, the soap solution is mixed with tap water, monomers and other materials on line through a metering control system and enters an emulsion polymerization system;
the aqueous feed and feed flow to the emulsion polymerization system is as follows:
| name of water-containing Material | Feed flow (kg/min) | Solid content or active ingredient content (%) | Tap Water content (%) |
| Soap liquid | Q1 | TS1 | k×(100-TS1) |
| Oxygen scavenger | Q2 | TS2 | 100-TS2 |
| Activating agent | Q3 | 7×TS NaFe | 100-7×TS NaFe |
| Water (W) | Q4 | 0 | 100 |
| Terminating agent | Q5 | TS5 | 100-TS5 |
In the table, k represents the percentage of tap water to the total amount of water in the soap solution;
in the process of preparing soap liquid, complexing agent EDTANA 2 ·2H 2 The addition of O is determined according to the following steps:
a. calculating the total feeding flow Q of tap water in unit kg/min;
Q＝Q4+0.01×[Q1×k×(100-TS1)+Q2×(100-TS2)+Q3×(100-7×TS NaFe )+Q5×(100-TS5)]；
b. the total hardness TH of tap water in units of mgCaCO, calculated as calcium carbonate, was obtained by assay 3 /L；
c. Determination of 1mgCaCO 3 Requiring EDTANA 2 ·2H 2 The amount of O W1 in kg;
W1＝1×10 -5 ×372.24×P EDTA ％×10 -3 ×(1+m％)；P EDTA is EDTANA 2 ·2H 2 The purity of O, m is an excess coefficient, and m is more than or equal to 1 and less than or equal to 5;
d. determining that EDTANa is required to be added when preparing the soap solution 2 ·2H 2 The amount of O is W;
W＝Q×TH×W1×W soap /Q1；W soap the total amount of soap solution is prepared for each batch, and the unit kg is.
The invention adopts tap water to prepare soap solution, deoxidant, activator and terminator, and EDTANA is added during the preparation of the soap solution 2 ·2H 2 O, adopting EDTANA as polyvalent metal ions in tap water 2 ·2H 2 The O is subjected to online complexation to form a stable water-soluble complex, the stable water-soluble complex is discharged along with wastewater in the processes of coagulation and dehydration, and the emulsion polymerization, the latex stability and the rubber physical property are not influenced, so that a new method for directly using tap water for the production of the emulsion polymerization styrene butadiene rubber is created. The method completely cancels the process that the prior emulsion polymerization technology needs to prepare tap water into deionized water for use, and has the following remarkable progress compared with the prior art:
1) Tap water is directly used, a deionized water device is omitted, the investment cost (about 500 ten thousand) of the deionized water device is saved, and important basis and basis are provided for planning, investing and occupying area of future projects.
2) The direct tap water use technology simplifies the production operation process, is convenient to use, eliminates unsafe factors of hydrochloric acid and alkali used for acid-base regeneration in deionized water preparation operation by an ion exchange method, and reduces the management cost;
3) The tap water can be directly and completely used, and compared with the deionized water preparation process, the invention can greatly improve the utilization rate of water resources and fully save the water resources.
4) The invention saves the running cost of the deionized water device. The cost can be saved by 33.5 ten thousand (ion exchange method) and 86 ten thousand (reverse osmosis method) per year, except for the cost of adding complexing agent, which is calculated by a 10 ten thousand ton/year butadiene styrene rubber device. (not including the replacement cost of the resin or film occurring periodically)
5) The product obtained by the method of the invention has basically the same physical and chemical properties with the product of the prior art and has no obvious difference. In the method, the complexing agent is excessively used, and the light color rubber SBR1502 also complexes polyvalent metal ions such as calcium, magnesium, zinc, iron, copper, manganese and the like in the raw materials due to the appearance of the complexing agent, so that the yellow index of the light color rubber is reduced compared with the conventional normal level, the color of the rubber is lighter, and the light color rubber is more favorable for the use of light color product customers; at the same time, cu in the rubber is excessive due to excessive use of the complexing agent 2+ 、Mn 2+ 、Fe 3+ The content is obviously reduced compared with the prior product, the thermal oxidation aging resistance, the external ultraviolet aging resistance and the ozone aging resistance of the styrene butadiene rubber can be greatly improved, the product quality of the product prepared by the method is obviously superior to that of the prior art, and the market competitiveness of the product is greatly improved.
As optimization, the tap water is directly used in the method for producing the emulsion polymerization styrene butadiene rubber, and the value of the excess coefficient m is 4-5. Tests show that the complexing agent with the excessive amount of 4-5 percent can fully complex metal ions in a polymerization system on line.
As optimization, the method for directly using tap water in the production of emulsion polymerized styrene butadiene rubber has the advantage that the added disodium EDTA during soap liquid preparation meets the requirement that the COD discharge of factory wastewater is not more than 500mg/L. Therefore, the COD discharge of the factory wastewater meets the discharge standard of less than or equal to 500mg/L, and the generated wastewater can be discharged into a park sewage treatment plant.
Preferably, in the method for directly using tap water in the production of the emulsion polymerized styrene butadiene rubber, the raw material water for preparing the soap solution comprises steam condensate and tap water. The utilization of the steam condensate is beneficial to saving water resources.
Preferably, the tap water is directly used in the method for producing the emulsion polymerized styrene-butadiene rubber, and the emulsion polymerized styrene-butadiene rubber can be SBR1502.SBR1502 is a current grade with larger yield, the economic benefit is obvious by using the method of the invention, and the method of the invention can be used for producing styrene butadiene rubber with other grades. Further, the excess coefficient m is 5. Tests show that for light-colored SBR1502, under the condition that the complexing agent is excessive by 5%, the yellow index of the light-colored SBR is reduced by 20% compared with the existing normal level, the rubber color is lighter, and the light-colored SBR is more beneficial to the use of customers of light-colored products; at the same time, cu in the rubber is excessive due to excessive use of the complexing agent 2+ 、Mn 2+ 、Fe 3+ The content of the SBR1502 is obviously reduced compared with the existing products, the thermal oxidation aging resistance, the external ultraviolet aging resistance and the ozone aging resistance of the SBR1502 can be greatly improved, the quality of the SBR1502 product prepared by the method is obviously superior to that of the SBR1502 product in the prior art, and the market competitiveness of the product is greatly improved.
Detailed Description
The present invention will be further described with reference to specific embodiments (examples), but the present invention is not limited thereto. The details which are not described in the following examples are all common knowledge in the art.
The method for directly using tap water for producing emulsion polymerized styrene-butadiene rubber uses tap water to prepare soap solution, deoxidant, activator and terminator; adding complexing agent EDTANA during the preparation of soap solution 2 ·2H 2 O (adding complexing agent together with water, potassium oxyhydroxide, disproportionated rosin, potassium chloride, diffusant and fatty acid); after the soap solution is qualified, the soap solution is mixed with tap water, monomers and other materials on line through a metering control system and enters emulsionA polymerization system.
Emulsion polymerization, latex storage process pH =10 around complex stability experiment:
taking 1L of 15% soap solution, preparing 2X 10 calcium and magnesium ions -2 mol/L aqueous solution (calcium and magnesium ions mass ratio is 3 2 ·2H 2 O), diluted with deionized water to give 2X 10 -3 mol/L、2×10 -4 mol/L、2×10 -5 mol/L (deionized water hardness of 0.2mg/L, reduced to M) 2+ Is 2 x 10 - 6 mol/L) so that the precise concentration is 2.002X 10 -3 mol/L、2.02×10 -4 mol/L、2.2×10 -5 mol/L. 50mL of 15% soap solution was mixed with the above solution by volume 1. Preparation 2.2X 10 -5 mol/L、1.8×10 -5 mol/L、1.4×10 -5 mol/L、1.0×10 -5 mol/L、0.6×10 -5 mixing the water solution with the concentrations of calcium ions and magnesium ions of mol/L with 15 percent of soap solution with the same volume, keeping the temperature of the sample at 10 ℃, standing overnight, and observing that the sample added with the complexing agent is clear and bright yellow, and the sample not added with the complexing agent is slightly turbid. Adding a small amount of EDTANA into deionized water 2 ·2H 2 The turbidity was measured for a blank of O and 15% soap mixture and the results are given in the following table (turbidity units: NTU):
in the table "M EDTAM", the first M means mol/L and the second M is the initial of Metal and means a polyvalent Metal ion. The experimental results show that the sample does not have turbidity when the complexing agent is excessive by 5%, which indicates that EDTA has strong complexing ability for calcium and magnesium ions under the condition that the pH =10 before latex coagulation.
Latex coagulation process pH =3.5 around complex stability experiment:
adding a proper amount of mixed soap solution for emulsion polymerized styrene butadiene rubber into a mixed solution of high-concentration magnesium chloride and calcium chloride, stirring to completely precipitate, filtering, washing the filtrate with deionized water for multiple times, drying to constant weight, and collecting for later use.
Taking a proper amount of dry calcium and magnesium mixed soap, wherein the mass is accurate to 0.001g. Average molecular weight of the soap blend 640, EDTANA weighed 5% excess 2 ·2H 2 O, the molecular weight of which is 372. Mixing the two substances together, adding deionized water, adjusting pH to 3.5 with dilute hydrochloric acid, simulating coagulation temperature in latex post-treatment process, and gradually dissolving insoluble soap by magnetic stirring. Indicating that a chemical reaction is taking place: m (RCOO) 2 ↓+EDTANa 2 = EDTAM +2NaRCOO, which is sufficient to indicate that insoluble calcium, magnesium and other insoluble soaps are not formed during latex coagulation, and do not affect rubber ash, soap content and related physical properties.
The aqueous feed and feed flow to the emulsion polymerization system are as follows:
| name of water-containing Material | Feed flow (kg/min) | Solid content or effective content (%) | Tap Water content (%) |
| Soap liquid | Q1 | TS1 | k×(100-TS1) |
| Oxygen scavenger | Q2 | TS2 | 100-TS2 |
| Activating agent | Q3 | 7×TS NaFe | 100-7×TS NaFe |
| Water (I) | Q4 | 0 | 100 |
| Terminating agent | Q5 | TS5 | 100-TS5 |
In the table, k represents the percentage of tap water to the total water in the soap solution;
in the process of preparing soap liquid, complexing agent EDTANA 2 ·2H 2 The addition of O is determined according to the following steps:
a. calculating the total feeding flow Q of tap water for emulsion polymerization in kg/min;
Q＝Q4+0.01×[Q1×k×(100-TS1)+Q2×(100-TS2)+Q3×(100-7×TS NaFe )+Q5×(100-TS5)]；
b. the total hardness TH of tap water is obtained by assay, and is measured by calcium carbonate in mgCaCO unit 3 /L；
c. Determination of 1mgCaCO 3 Requiring EDTANA 2 ·2H 2 The amount of O W1 in kg;
W1＝1×10 -5 ×372.24×P EDTA ％×10 -3 ×(1+m％)；P EDTA is EDTANA 2 ·2H 2 The purity of O, m is an excess coefficient, and m is more than or equal to 1 and less than or equal to 5; (CaCO) 3 Molecular weight of 100,1mg CaCO 3 Equivalent to 1 × 10 -3 /100＝1×10 -5 mol; according to the complexing reaction equation, the complexing molar ratio of EDTA disodium salt to polyvalent metal ions is 1:1, complexing agentM% use in excess)
d. EDTANA is added when soap liquid is determined to be prepared 2 ·2H 2 The amount of O W;
W＝Q×TH×W1×W soap /Q1；W soap the total amount of each batch of soap solution is prepared in unit kg.
As a specific embodiment, the value of the excess coefficient m may be 4 to 5. Tests show that when the complexing agent is excessive by 4% -5% according to the complexing equation, the complexing agent can be fully complexed on line.
As a specific implementation mode, the added disodium EDTA during the soap solution preparation meets the requirement that the COD discharge of the factory wastewater is not more than 500mg/L. Because the EDTA (ethylene diamine tetraacetic acid) has a very stable structure and is difficult to degrade biochemically, the influence on the COD of the wastewater should be considered. The COD discharge of the emulsion polymerized styrene butadiene rubber factory wastewater is carried out to the standard of less than or equal to 500mg/L. If the COD of the factory sewage discharge port is less than or equal to 350mg/L before the implementation of the invention, the implementation of the invention allows the COD to be increased by 150mg/L at most so as to meet the discharge regulation. If the hardness of tap water at the plant site is too high to cause COD to rise above 150mg/L, it is contemplated to reduce the amount of tap water (e.g., using a small amount of deionized water) so that the wastewater COD discharge meets the standard of 500mg/L or less.
As one embodiment, the raw water for preparing the soap solution comprises steam condensate and tap water. The steam condensate water is utilized, and water resource saving is facilitated.
As a specific embodiment, the emulsion polymerized styrene butadiene rubber is SBR1502. Further, the excess coefficient m is 5.
The present invention is further illustrated by the following specific examples, which should not be construed as limiting the scope of the invention.
The embodiment is as follows:
in the examples, the hardness of tap water was 15mg/L in terms of calcium carbonate (the hardness of tap water at the site of the factory of my company was maintained around 15mg/L throughout the year).
In the embodiment, the water for preparing the soap solution is steam condensate water and tap water, and the complexing agent EDTANA is added when the soap solution is prepared 2 ·2H 2 O-associated steam condensate, tap water, potassium oxyhydroxide, disproportionated rosin, potassium chloride and diffusantAnd fatty acid are added together. In the prepared qualified soap liquid, tap water accounts for 85% of the total amount of water, namely k =85%. (in the soap solution, water includes steam condensate, tap water, water generated by acid-base reaction, etc.)
In the examples, the emulsion polymerized styrene-butadiene rubber is SBR1502, and the excess coefficient m =5, that is, when preparing soap solution, the complexing agent is added in an excess of 5% according to the chemical formula.
The physicochemical data of SBR1502 obtained by deionization polymerization and tap water polymerization are shown in the following table:
except for yellow index, the physical properties of the product obtained by deionized water polymerization and the product obtained by tap water polymerization are basically the same, and no obvious difference exists. Because of the use of a little excessive complexing agent, the complexing agent also complexes polyvalent metal ions such as calcium, magnesium, zinc, iron, copper, manganese and the like in the raw materials, particularly the complexing of trace iron dissolved in latex, the yellow index of SBR1502 is reduced to 15-20 from the existing normal level of 20-25, the color of rubber is lighter, and the use of light-colored products by customers is more favorable. At the same time, cu in the rubber is excessive due to excessive use of the complexing agent 2+ 、Mn 2+ 、Fe 3+ The content is obviously reduced compared with the prior product, and the thermal oxidation aging resistance, the external ultraviolet aging resistance and the ozone aging resistance of the styrene butadiene rubber can be greatly improved.
The above general description of the invention and the description of its specific embodiments in this application should not be construed as limiting the invention to the embodiments set forth herein. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the embodiments to form other technical solutions within the protection scope of the present application without departing from the present disclosure.
Claims (6)
1. The method for directly using tap water for producing the emulsion polymerization styrene butadiene rubber is characterized by comprising the following steps:
the method uses tap water to prepare soap solution, an oxygen scavenger, an activator and a terminator; adding complexing agent EDTANA during the preparation of soap solution 2 ·2H 2 O; after the soap solution is qualified, the soap solution is mixed with tap water, monomers and other materials on line through a metering control system and enters an emulsion polymerization system;
the aqueous feed and feed flow to the emulsion polymerization system are as follows:
In the table, k represents the percentage of tap water to the total water in the soap solution;
in the process of preparing soap liquid, complexing agent EDTANA 2 ·2H 2 The addition of O is determined according to the following steps:
a. calculating the total feeding flow Q of tap water in unit kg/min;
Q＝Q4+0.01×[Q1×k×(100-TS1)+Q2×(100-TS2)+Q3×(100-7×TS NaFe )+Q5×(100-TS5)]；
b. the total hardness TH of tap water in units of mgCaCO, calculated as calcium carbonate, was obtained by assay 3 /L；
c. Determination of 1mgCaCO 3 Requiring EDTANA 2 ·2H 2 The amount of O W1 in kg;
W1＝1×10 -5 ×372.24×P EDTA ％×10 -3 ×(1+m％)；P EDTA is EDTANA 2 ·2H 2 The purity of O, m is an excess coefficient, and m is more than or equal to 1 and less than or equal to 5;
d. determining that EDTANa is required to be added when preparing the soap solution 2 ·2H 2 The amount of O is W;
W＝Q×TH×W1×W soap /Q1；W soap the total amount of soap solution is prepared for each batch, and the unit kg is.
2. The method of using tap water directly in the production of emulsion polymerized styrene butadiene rubber according to claim 1, characterized in that: the value of the excess coefficient m is 4-5.
3. The method of using tap water directly in the production of emulsion polymerized styrene butadiene rubber according to claim 1, characterized in that: the added EDTA disodium amount meets the requirement that the COD discharge of the factory wastewater is not more than 500mg/L when the soap solution is prepared.
4. The method of using tap water directly in the production of emulsion polymerized styrene butadiene rubber according to claim 1, 2 or 3, wherein: the raw water for preparing the soap solution comprises steam condensate and tap water.
5. The method of claim 4, wherein the tap water is directly used for the production of the emulsion polymerized styrene butadiene rubber, and the method comprises the following steps: the emulsion polymerized styrene-butadiene rubber is SBR1502.
6. The method of claim 5, wherein the tap water is directly used for the production of the emulsion polymerized styrene butadiene rubber, and the method comprises the following steps: the excess factor m is 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB901568A (en) * | 1960-02-26 | 1962-07-18 | Huels Chemische Werke Ag | A process for the production of synthetic rubber |
| JPH07229067A (en) * | 1993-06-14 | 1995-08-29 | Lion Corp | Sizing agent composition and method for sizing fiber product |
| US5583173A (en) * | 1995-04-10 | 1996-12-10 | The Goodyear Tire & Rubber Company | Process for preparing styrene-butadiene rubber |
| JPH1017601A (en) * | 1996-07-05 | 1998-01-20 | Toray Ind Inc | Method for preventing staining of polymerizing vessel for polybutadiene rubber latex |
| CN111620969A (en) * | 2020-05-22 | 2020-09-04 | 浙江维泰橡胶有限公司 | Method for carrying out emulsion polymerization by using tap water instead of deionized water |
-
2022
- 2022-08-25 CN CN202211026330.9A patent/CN115160497A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB901568A (en) * | 1960-02-26 | 1962-07-18 | Huels Chemische Werke Ag | A process for the production of synthetic rubber |
| JPH07229067A (en) * | 1993-06-14 | 1995-08-29 | Lion Corp | Sizing agent composition and method for sizing fiber product |
| US5583173A (en) * | 1995-04-10 | 1996-12-10 | The Goodyear Tire & Rubber Company | Process for preparing styrene-butadiene rubber |
| JPH1017601A (en) * | 1996-07-05 | 1998-01-20 | Toray Ind Inc | Method for preventing staining of polymerizing vessel for polybutadiene rubber latex |
| CN111620969A (en) * | 2020-05-22 | 2020-09-04 | 浙江维泰橡胶有限公司 | Method for carrying out emulsion polymerization by using tap water instead of deionized water |
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