• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process is provided for the coagulation of rubber polymers from aqueous emulsions thereof wherein the coagulation is undertaken in the presence of an additive selected from a polysaccharide material and from a vegetable derived proteinaceous material. The polymers so coagulated are readily dried and may be used for the manufacture of products well known for the specific polymers.
    公开号:SU973026A3
    申请号:SU803210747
    申请日:1980-11-25
    公开日:1982-11-07
    发明作者:Хельмут Вандер Ричард
    申请人:Полисар Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the process of coagulating synthetic latexes, in particular butadiene (styrene) acrylo-nitrile latexes, and can be used in the preparation of synthetic rubber. The known method of coagulating latex polymers or co-doped conjugated dienes by treating them with aqueous solutions of electrolytes, such as inorganic acids or their salts, as coagulants C. The disadvantage of this method is the relatively large heterogeneity of the coagulated rubber with respect to its particle size, which complicates its further processing. The closest to the invention in its technical nature is the method of coagulating butadiene (styrene) acrylonitrile latexes by treating them with aqueous solutions of sulfuric acid, sodium chloride (calcium or their mixtures f2. The disadvantages of this method are the heterogeneity of coagulated copolymer particles and a high content of water, which complicates the process of drying rubber. The purpose of the invention is to reduce the adherence of the particles of the selected copolymer and the content of water in them. Butadiene (styrene) acrylonitrile latex agitation by treating them with aqueous solutions of sulfuric acid, sodium chloride (calcium) or their mixtures, the process is carried out in the presence of aqueous solutions or suspensions 0.5-2.5 parts by weight (per 100 weight copolymer) of compounds selected from the group comprising potato starch, soybean, wheat or peanut flour and sunflower seed flour.In addition, the process can be carried out additionally in the presence of 0.02-2 weight.h. (per 100 parts by weight of copolymer) of acrylamide-sodium acrylate copolymer, Example 1 (control). In a flat-bottomed tank with a capacity of 12 liters with high walls poured 8 liters of water. The mixer was set above the tank so that the aqueous phase could be mixed. A pH meter was installed above the tank so that the pH value of the aqueous phase could be measured continuously. The pipeline was conducted into water so that steam could be supplied to it, and a thermocouple was installed to measure the temperature of the aqueous phase. Installed podlcie means so that small amounts of polyamine can be added to the aqueous phase. The water in the tank was heated to, and the pH value was adjusted to 3.5-4.0 by adding dilute sulfuric acid, Styrene-butaderyl latex was added to the aqueous phase, supporting the pH value 3.5-4 by simultaneously adding sulfuric acid, while continuously polyamine (copolymer of acrylamide with sodium acrylate brand NL Co ® 107) was added once; such a speed so that 0.1 weight.h, poly1 1 1 was accounted for 100 weight, h. polymer Styrene-butadiene rubber contained 23. 5% by weight styrene and 76.5% by weight butadiene, and latex contained 24% by weight of polymer 1 l of latex was added to the aqueous phase and coagulated. After adding the latex, the agitator worked for 2 minutes to ensure complete mixing of the components, and then it was turned off. The aqueous phase (serum) turned out to be quite transparent, and the polymer that lifted to the surface of the aqueous phase, bksh in the form of particles with a size ranging from medium-to-large, and the particles were ligate on the surface. the dryer with the predinitor / :; Circulation “by the syrup” of hot air ,, get large-sized parts, which Ecuterne has small cavities with trapped water.
    PRI me R 2 (control). Conducted according to example 1 for the LCr key that was used; , n;: o, qi, containing 2.5% by weight of chloro1:: sodium, and polyamine was added at such a rate that: 0.05 weight, h, polyamyrme accounted for 1 t. 100 weight, h, of polymer. After off; ). ;; 1check; and the agitators turned out that the whey was transparent, and the polymer was in the form of large particles. In the case of polymer particles, they tried to stick together with each other and contained ;: within themselves a multitude of small poposfees filled with lost water.
    example 3 (control), similarly to example 1, except that the polymer was a butadiene-acrylonitrile polymer containing 34% by weight of acrylonitrile. f fatty acid emulsifier type a: atex contains 28 wt.% of the polymer. After the switch was turned off, the whey was slightly turbid, and the polymer
    was in the form of large particles, sticky from the surface. After drying the polymer particles, particles stuck together with each other and contained within themselves small cavities filled with trapped water.
    Example 4 (control). The equipment described in Example 1 was coagulated using a butadiene acrylonitrile polymer containing 34% by weight acrylonitrile, the emulsifier being an alkali metal salt and alkylnaphthalene sulfonic acid, and the latex containing 30% by weight polymer, and coagulating by adding 1 L latex to 8 l of water, maintained at 50 ° C and containing 0.3 wt.% calcium chloride, and simultaneously adding a solution containing 0.5 wt.% calcium chloride. After turning off the stirrer, the whey was fairly clear, and the polymer was present in the form of large particles. After drying the polymer particles, a polymer was obtained containing small amounts of water inside the large polymer particles.
    Example 5. Following the procedure of Example 1, styrene-butadiene rubber latex was coagulated by slowly adding to the aqueous phase while adding sulfuric acid to maintain a pH value of 3.5-4, with the polyamine compound being added at such a rate that 0.1 parts by weight . polyamine compound accounted for 100 weight.h. polymer, and added with 2.5 weight, h. corn starch slurry, which is boiled beforehand, at such a rate as to provide 1.4 weight parts. dry corn starch per 100 weight.h. polymer
    After turning off the stirrer, the serum was quite transparent, and the polymer was in the form of small particles with a slightly sticky surface. After drying the polymer particles, the particles obtained were about the same. sizes that equally contained little moisture.
    Compared to example 1, smaller and more uniform in size particles were obtained, which are easier to dry to a uniform low residual moisture content.
    Example 6. The procedure of Example 5 was repeated, except that instead of corn starch, a suspension (5 wt.%) Of soybean flour obtained by boiling was used, and the suspension feed rate was such that 1.5 weight parts. dry soy flour accounted for 100 weight.h. polymer, and the rate of addition of the polyamine was such as to provide
    about 0.03 weight.h. polyamine per 100 weight.h, polymer.
    After the stirrer was turned off, the whey was clear, and the polymer was present in the form of rather uniform in size small particles having a slightly adhesive surface. Field drying of the polymer received particles of the same size, which had the same low moisture content.
    Example 7. The procedure of Example 2 was repeated, with the exception that polyamine was added at such a rate to approximately 0.02 parts by weight. polyamine accounted for 100 weight.h. the polymer, and there was also added a suspension of 5 wt.% soybean flour obtained by boiling, with such a rate that about 0.7 wt.h. soy flour accounted for 100 weight.h. polymer After the completion of mixing, the serum was transparent, and the polymer particles were homogeneous in size, small particles, had a low-adhesive surface, and they were easily dried, obtaining the same particle size 3, having an equally small residual moisture content.
    Example 8, the procedure of Example 1 was repeated, except that the rate of polyamine addition was such that 0.2 weight parts. polyamine accounted for 100 weight.h. polymer, and there was also added a suspension of wheat flour, previously obtained by boiling, and the rate of addition was such that 1.5 weight parts of wheat flour accounted for .100 weight parts. polymer
    After turning off the stirrer, the whey turned out to be quite transparent, and the polymer was present in the form of small particles having a slightly adhesive surface, which dried out to obtain particles of the same size that had the same low residual moisture content.
    Example 9. The method of Example 1 was used, except that a solution containing 5% by weight of peanut flour was added, not polyamine. Peanut flour was transferred to the solution by adding aqueous ammonia until the pH value. the solution was about 10.5. The rate of addition of the peanut flour solution was such as to provide 1.8 weight .4. peanut flour per 100 weight.h. polymer
    The whey was substantially transparent, and the polymer particles were quite small with very little tack on the surface. The polymer particles were dried easily, without significant agglomeration of particles that did not contain cavities with residual water.
    Example 10. The method of Example 1 was repeated, except that the polyamine was added at a rate of 0.02 weight.h. polyamine per 100 weight.h. polymer, and added a solution of flour from all. n sunflower with a speed that provides 2 weight.h. flour per 100 weight.h. polymer The sunflower seed flour was transferred to a solution in water by adding aqueous ammonia until the pH value was about 10,
    The whey was clear, and the polymer particles were small and uniform in size and had low surface stickiness. With
    5 drying the polymer particles obtained similar small-sized particles that dried uniformly without cavities of residual water.
    Example 11. The procedure of Example 9 was repeated, except that instead of peanut flour, soy protein concentrate was added, dissolved in water with added ammonia to a pH of about 10, and
    5 concentrate was added at a rate of 1.3 parts by weight. per 100 weight parts polymer
    The serum was slightly turbid, and the polymer particles were uniform and very small in size and did not substantially have surface stickiness. Polymer particles are easily dried, resulting in a uniformly dried product.
    Example 12. Repeated method
    5 of Example 3, with the exception that an ammonia solution (pH 10.5) of soybean flour was also added at a rate of 1.5 parts by weight. flour per 100 weight.h. polymer, and the rate of addition of polyamides was not reduced to about 0.04 parts by weight. per 100 weight parts the polymer {while the butadiene-acrylonitrile latex coagulated) and obtained small polymer particles having a low surface stickiness, which were lightly dried to a uniformly low residual moisture content.
    Example 13. The butadiene-acrylonitrile latex of Example 4 was coagulated by the method described in Example 4, except that the aqueous phase was maintained at pH 3.5-4 by adding sulfuric acid simultaneously with the addition of calcium chloride solution, and also added
    5 solution of soybean flour in aqueous ammonia at a rate of 0.5 weight.h. flour per 100 weight.h. polymer Serum after coagulation was transparent, and polymer particles
    The 0s were very small and relatively uniform in size and were easily dried to a low residual moisture content.
    Therefore, the invention is allowed.
    5 significantly reduces the stickiness of the particles of the selected copolymer and the moisture content in them.
    权利要求:
    Claims (2)
    [1]
    1. The method of coagulation of butadiene (styrene) acryloves rylate of latexes by treating them with aqueous solutions of sulfuric acid, sodium chloride (calcium) or their mixtures, characterized in that, in order to reduce the stickiness of the particles of the selected copolymer and the content of water in them, the process is wire t in the presence of aqueous solutions or suspensions of 0.5-2.5 parts by weight, (per 100 parts by weight of copolymer) of compounds selected
    from the group containing potato starch, soybean, wheat or peanut flour and sunflower seed flour.
    [2]
    2. A method according to claim 1, characterized in that the process is further carried out in the presence of 0.02-0.2 weight parts. (per 100 parts by weight of copolymer) of acrylamide-sodium acrylate copolymer.
    Sources of information taken into account in the examination
    1. Kirpichnikov P.A. and others. Chemistry
    and synthetic rubber technologists L., Khimi, 1970, p. 393-399.
    2.Witbi G.S. Synthetic L., Goskhimizdat, 1957. p. 191-193 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU973026A3|1982-11-07|Process for coagulating butadiene-|-acrylonitrile latexes
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    WO2006035851A1|2006-04-06|Method for coagulating natural rubber latex
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    US2101574A|1937-12-07|Hardening of proteins
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    SU538001A1|1976-12-05|The method of processing crumb synthetic rubber
    SU888908A1|1981-12-15|Protein product production method
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    JPH07274884A|1995-10-24|Method for coagulating soybean milk
    JP2900557B2|1999-06-02|Modified protein materials and products
    SU1659427A1|1991-06-30|Method for obtaining polymeric granulated anionite
    KR820001701B1|1982-09-21|Method for manufacturing of beverage from bean and egg
    同族专利:
    公开号 | 公开日
    SE8008146L|1981-05-27|
    GB2064554B|1983-09-07|
    IT1134461B|1986-08-13|
    DE3043688A1|1981-06-04|
    BR8007654A|1981-06-09|
    ES497104A0|1981-10-16|
    ES8200376A1|1981-10-16|
    GB2064554A|1981-06-17|
    AR228042A1|1983-01-14|
    US4345067A|1982-08-17|
    US4536568A|1985-08-20|
    JPS5686937A|1981-07-15|
    CA1134982A|1982-11-02|
    ZA807217B|1981-07-29|
    IT8026236D0|1980-11-26|
    AU6457580A|1981-06-04|
    SE450574B|1987-07-06|
    AU538820B2|1984-08-30|
    NL8006309A|1981-06-16|
    FR2470138B1|1985-11-15|
    FR2470138A1|1981-05-29|
    BE886340A|1981-05-25|
    TR20910A|1982-12-23|
    MX6546E|1985-07-10|
    JPS6364452B2|1988-12-12|
    DE3043688C2|1987-08-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US2529885A|1947-04-02|1950-11-14|Goodrich Co B F|Delayed action coagulant|
    US2588947A|1947-04-02|1952-03-11|Goodrich Co B F|Delayed-action coagulant and method of coagulating acidcoagulable latex|
    US2604467A|1949-06-23|1952-07-22|Phillips Petroleum Co|Coagulation of synthetic latices and recovery of emulsifying agents therefrom|
    US2788336A|1952-08-29|1957-04-09|Uhing Eugene Henry|Carboxymethyl protein as a stabilizer for a butadiene-styrene latex emulsion paint|
    US2709689A|1952-11-24|1955-05-31|Glidden Co|Emulsion vapor barrier coating compositions|
    US3015854A|1956-04-10|1962-01-09|Goodyear Tire & Rubber|Method of shaping foamed rubber latex|
    FR1165401A|1956-07-02|1958-10-24|Auxiliaire De L Inst Francais|Process for strengthening elastomers with proteins|
    US3024223A|1959-10-12|1962-03-06|Phillips Petroleum Co|Latex coagulation technique|
    US3330800A|1964-02-13|1967-07-11|Firestone Tire & Rubber Co|Process for coagulating butadiene polymers in the presence of an imidazolidine-15-thione stabilizer|
    US3501423A|1966-03-29|1970-03-17|Firestone Tire & Rubber Co|Liquid vulcanizable rubber composition of matter|
    US3483174A|1966-06-30|1969-12-09|Firestone Tire & Rubber Co|Process for coagulating latices of copolymers and terpolymers of conjugated dienes and carboxylic acids|
    DE2215413C3|1972-03-29|1979-11-15|Bayer Ag, 5090 Leverkusen|Isolation of rubbers|
    DE2332096C3|1973-06-23|1982-03-18|Bayer Ag, 5090 Leverkusen|Isolation of rubbers|
    US3915909A|1973-06-23|1975-10-28|Bayer Ag|Recovery of rubber as a powder from its aqueous dispersion|
    DE2751786A1|1977-11-19|1979-05-23|Bayer Ag|METHOD OF INSULATING RUBBER|
    DD136617A1|1978-05-19|1979-07-18|Lothar Voelz|METHOD FOR PRODUCING CONCENTRATED LATICES BY FRACTION|JPS5984922A|1982-11-04|1984-05-16|Mitsubishi Monsanto Chem Co|Method for coagulating thermoplastic resin latex|
    DE3715421A1|1987-05-08|1988-11-24|Henkel Kgaa|USE OF A FAT OILS EX HELIANTHUS ANNUUS FOR THE PRODUCTION OF EMULSIFIERS FOR EMULSION POLYMERISATION|
    CA2003745A1|1989-11-13|1991-05-23|Narito Ishiga|Process for preparing an impact resistant resin|
    US5037410A|1990-08-08|1991-08-06|Zimmerman Robert R|Disposable articles comprising compostible components|
    AT397372B|1992-03-17|1994-03-25|Semperit Ag|VEHICLE TIRES|
    DE10108981A1|2001-02-23|2002-09-12|Continental Ag|Rubber compound for tire treads|
    WO2003043937A2|2001-11-15|2003-05-30|Pq Holding, Inc.|Method for controlling synthesis conditions during molecular sieve synthesis using combinations of quaternary ammonium hydroxides and halides|
    US8476342B2|2006-11-07|2013-07-02|Cooper Tire & Rubber Company|Method and formulation for reinforcing elastomers|
    DE102007024011A1|2007-05-22|2008-11-27|Lanxess Deutschland Gmbh|nitrile rubbers|
    DE102007024010A1|2007-05-22|2008-11-27|Lanxess Deutschland Gmbh|nitrile rubbers|
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    MX2010008259A|2008-01-29|2010-08-18|Lanxess Deutschland Gmbh|Nitrile rubbers which optionally contain alkylthio terminal groups and which are optionally hydrogenated.|
    JP5718056B2|2008-01-29|2015-05-13|ランクセス・ドイチュランド・ゲーエムベーハー|Nitrile rubber optionally containing alkylthio end groups and optionally hydrogenated|
    WO2009095313A1|2008-01-29|2009-08-06|Lanxess Deutschland Gmbh|Nitrile rubbers which optionally contain alkylthio terminal groups and which are optionally hydrogenated|
    DE102008056975A1|2008-11-13|2010-05-20|Lanxess Deutschland Gmbh|Storage-stable, hydroxyl-modified microgellatices|
    KR101305441B1|2011-09-23|2013-09-09|한국기술교육대학교 산학협력단|Method for manufacturing of Starch/rubber Latex Compound Using Coupling reagent|
    TWI639638B|2014-02-03|2018-11-01|德商朗盛德意志有限公司|Stabilized rubbers|
    CN106046432B|2016-05-25|2019-03-12|中国化工株洲橡胶研究设计院有限公司|A kind of latex product coagulator and the preparation method and application thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CA000340590A|CA1134982A|1979-11-26|1979-11-26|Emulsion polymer recovery|
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