CS262648B1 - Process for preparing terpolymoric ethyl acrylate-methyl methacrylate-acrylonitrile latex - Google Patents
Process for preparing terpolymoric ethyl acrylate-methyl methacrylate-acrylonitrile latex Download PDFInfo
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- CS262648B1 CS262648B1 CS878358A CS835887A CS262648B1 CS 262648 B1 CS262648 B1 CS 262648B1 CS 878358 A CS878358 A CS 878358A CS 835887 A CS835887 A CS 835887A CS 262648 B1 CS262648 B1 CS 262648B1
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- ethyl acrylate
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Abstract
Očelom spĎsobu přípravy terpolymérového etylakryláť-metylmetakrylát-akrylonitrilového latexu emulznou multikomponentnou polymerizáciou je zlepšenie regulácie reakcie, přípravy nového terpolyméru a získanie stabilnej polymérovej disperzie. Uvedený účel sa dosiahne tak, že sa pri príprave terpolymérového etylakrylát-metylmetakrylát-akrylonitrilového latexu použije 0,67 až 2,7 hmotnostných dielov laurylsulfátu sodného vztiahnuté na 100 hmotnostných dielov vody. Spósob přípravy terpolymérového latexu emulznou polymerizáciou móže mať použitie v chémii nátěrových a impregnačných prípravkoV.The purpose of the method of preparation of terpolymer ethyl acrylate-methyl methacrylate-acrylonitrile latex by emulsion multicomponent polymerization is to improve the regulation of the reaction, to prepare a new terpolymer and to obtain a stable polymer dispersion. The stated purpose is achieved by using 0.67 to 2.7 parts by weight of sodium lauryl sulfate based on 100 parts by weight of water in the preparation of terpolymer ethyl acrylate-methyl methacrylate-acrylonitrile latex. The method of preparing terpolymer latex by emulsion polymerization can be used in the chemistry of coating and impregnation preparations.
Description
Vynález sa týká spósobu přípravy terpolymérového etylakrylát-metylmetakrylát-akrylonitrilového latexu.The present invention relates to a process for preparing a terpolymer ethyl acrylate-methyl methacrylate acrylonitrile latex.
Polymérové disperzie připravené emulznou kopolymerizáciou hydrofilných a hydrofóbnych monomérov mali široké priemyselné použitie a boli predmetom mnohých teoretických štúdií fí. Nakamura, H. Tabata, H. Suzuki, K. Iko, M. Okubo, T. Matsumoto; J. Appl. Polym. Sci.Polymer dispersions prepared by emulsion copolymerization of hydrophilic and hydrophobic monomers have been widely used in industry and have been the subject of many theoretical studies of phi. Nakamura, H. Tabata, H. Suzuki, K. Iko, M. Okubo, T. Matsumoto; J. Appl. Polym. Sci.
32, 4 865 (1986); 1. Čapek. L. Q. Tuan: Makromol. chem. 187, 2 063 (1986)7· Často sa připravovali polymérové disperzie na báze akrylátovej. Nevýhodou emulznej kopolymerizácie hydrofilného monoméru (akrylonitril, vinylacetát ...) s hydrofóbnym (butylakrylát, etylakrylát ...) že takto vznikali polymérové disperzie s nízkou stabilitou, s vysokým výťažkom koagulátu a s nízkým obsahom pevného polymérového substrátu. Ďalšou nevýhodou emulznej kopolymerizácie monomérov s rozdielnou rozpustnosťou vo vodě je, že takto vznikali polymérové disperzie s nižšou stabilitou i pri vyšších koncentráciach emulgátora (sodná sol kyseliny dodecylfenoxybenzéndisulfonovej, polyoxyetylén monopalmitán sorbitolu, stearát sodný, sodná sol oktadekán-l-enyl sulfónovej kyseliny, alkylsulfonát sodný) £l. Čapek, J. Bartoň, E. Orolfnová: Acta Polymerica 36, 187 (1985); I. Čapek, J. Bartoň, V. Svoboda, V. Novotný, L. Q. Tuan: Makromol. Chem. 188, 1 723 (1987); C. Hagiopol, V. Dimonie, M. Georgescu, I. Deaconescu,32, 4,865 (1986); 1. Čapek. L. Q. Tuan: Macromol. 187, 2 063 (1986) 7 Acrylic-based polymer dispersions were often prepared. A disadvantage of the emulsion copolymerization of a hydrophilic monomer (acrylonitrile, vinyl acetate ...) with hydrophobic (butyl acrylate, ethyl acrylate ...) is that polymer dispersions are obtained with low stability, high coagulate yield and low solid polymer substrate content. A further disadvantage of emulsion copolymerization of monomers with different water solubilities is that polymer dispersions with lower stability are formed at higher emulsifier concentrations (sodium dodecylphenoxybenzene disulfonic acid, polyoxyethylene monopalmitate sorbitol, sodium stearate, sodium alkyl en octadecanone-1-sulfonate-1-sulfonate). ) £ l. Capek, J. Barton, E. Orolfn: Acta Polymerica 36, 187 (1985); I. Capek, J. Barton, V. Svoboda, V. Novotny, L. Q. Tuan: Macromol. Chem. 188, 1723 (1987); C. Hagiopol, V. Dimonie, M. Georgescu, I. Deaconescu,
T. Deleanu, M. Marinescu: Acta Polymerica 32, 390 (1981); 0. K. Shvetsov: Acta Polymerica 37, 573 (1986); O. K. Svecov, T. D. Žurkova, B. F. Ustabščikov, I. M. Kanevski, N. P. Petuchov: Acta Polymerica 32, 403 (1981)7·Deleanu, T. Marinescu, Acta Polymerica 32, 390 (1981); K. Shvetsov, K.: Acta Polymerica 37, 573 (1986); O. K. Svecov, T. D. Zurkova, B. F. Ustabshchikov, I. M. Kanevski, N. P. Petuchov: Acta Polymerica 32, 403 (1981) 7 ·
Uvedené nevýhody v podstatnej miere odstraňuje spósob přípravy terpolymérového etylakrylát-metylmetakrylát-akrylonitrilového latexu, ktorého podstata spočívá v tom, že sa přidá 0,67 až 2,7 hmotnostných dielov laurylsulfátu sodného /emulgátor/ vztiahnuté na 100 hmotnostných dielov vody.The above-mentioned disadvantages are substantially eliminated by the process for preparing terpolymer ethyl acrylate-methyl methacrylate-acrylonitrile latex, which comprises adding 0.67 to 2.7 parts by weight of sodium lauryl sulfate (emulsifier) based on 100 parts by weight of water.
Výhodou navrhovaného spósobu přípravy terpolymérového etylakrylát-metylmetakrylát-akrylonitrilového latexu oproti doterajžím spósobom je, že je vyššia stabilita latexu a rýchlosť kopolymerizácie. Ďalšou výhodou je účinná regulácia priebehu a potlačenie negativného účinku akrylonitrilu na stabilitu latexu £a. P. Troitsky: Syntetic Rubber Industry in the SU,The advantage of the proposed process for the preparation of terpolymer ethyl acrylate-methyl methacrylate-acrylonitrile latex over the prior art is that the stability of the latex and the copolymerization rate are higher. Another advantage is the effective control of the course and the suppression of the negative effect of acrylonitrile on the stability of the latex 6a. P. Troitsky: Synthetic Rubber Industry in the SU,
Thematic review, Moscow; TsNIITENeftehin (1980),7.Thematic review, Moscow; TsNIITENephthhin (1980), 7.
Příklad 1Example 1
Do trojhrdlej reakčnej baňky objemu 1 000 ml opatrenej miešadlom, spatným chladičom, prívodom pre dusík a zariadením pre kontinuálny odběr vzorky latexu sa vdavkuje 450 g destilovanej vody, 245 g etylakrylátu, 31,6 g metylmetakrylátu, 30,4 g akrylonitrilu a 0,67 hmotnostných dielov laurylsulfátu sodného. Po 30 minútovom miešaní pri 400 otáčkách za minútu a teplote 60 °C sa přidá 0,6 g persulfátu amonného. V priebehu polymerizácie sa odoberie každých 10 minút 1 ml latexu /na izoláciu polyméru k stanoveniu stupňa konverzie/. Polymér aa izoluje z emulzie tak, že sa emulzia skoaguluje v 25 ml metanolu okyselenom kyselinou octovou na pH 2. Získaný polymér sa premýva 50 ml vody a 50 ml metanolu a nechá aa vysúšiť pri teplote 20 °C po dobu 4 dní a potom sa dosuší pri tlaku 6 kPa pri teplote 60 °C po dobu 8 hodin. Z týchto získaných údajov sa vypočítá rýchlosť polymerizácie v etacionárnom intervale £l. Čapek, J. Bartoň, E. Orolinová: chemické Zvěsti 38, 803 (1984)7· Po dopolymerizovaní monoméru sa latex filtruje a koagulát izoluje. Získaný polymérový koagulát aa suší po dobu 4 dni pri teplote 20 °C a potom sa dosuší pri tlaku 5 kPa pri teplote 60 °C po dobu 12 hodin. Rýchloat polymerizácie je 5 « konverzie za minútu a zlska sa 11 g skoagulovaného polyméru.A 1000 ml three-necked reaction flask equipped with a stirrer, a reflux condenser, a nitrogen inlet and a continuous latex sampler was charged with 450 g of distilled water, 245 g of ethyl acrylate, 31.6 g of methyl methacrylate, 30.4 g of acrylonitrile and 0.67 parts by weight of sodium lauryl sulfate. After stirring at 400 rpm for 30 minutes at 60 ° C, 0.6 g of ammonium persulfate was added. During the polymerization, 1 ml of latex is taken every 10 minutes (to isolate the polymer to determine the degree of conversion). Polymer aa is isolated from the emulsion by coagulation in 25 ml of acetic acid-acidified methanol to pH 2. The obtained polymer is washed with 50 ml of water and 50 ml of methanol and allowed to dry at 20 ° C for 4 days and then dried at 6 kPa at 60 ° C for 8 hours. From the data obtained, the polymerization rate is calculated in the ethnational interval l1. Caps, J. Barton, E. Orolinová: chemical rumors 38, 803 (1984) 7 · After dopolymerizovaní monomer latex coagulum filtered and isolated. The obtained polymer coagulate aa is dried for 4 days at 20 ° C and then dried at 5 kPa at 60 ° C for 12 hours. The polymerization rate was 5 " per minute and 11 g of coagulated polymer was obtained.
Přiklad 2Example 2
Postupuje sa ako v přiklade 1 s tým rozdielom, že aa použijú 2 hmotnostné dlely laurylsulfátu sodného vztiahnuté na 100 hmotnostných dielov vody. Rýchlosť polymerizácie je 9 % · konverzie za minútu a zlska sa 3,2 g skoagulovaného kopolyméru.The procedure was as in Example 1, except that aa used 2 parts by weight of sodium lauryl sulfate per 100 parts by weight of water. The polymerization rate is 9% conversion per minute and 3.2 g of the coagulated copolymer is obtained.
Příklad 3Example 3
Postupuje sa ako v příklade 1 s tým rozdielom, že sa použije ako emulgátor 2,67 hmotnost ných dielov laurylsulfátu sodného vztiahnuté na 100 hmotnostných dielov vody. Rýchlosť polymerizácie je 11 % konverzle za minútu a nezískal sa žiadny koagulát.The procedure is as in Example 1, except that 2.67 parts by weight of sodium lauryl sulfate based on 100 parts by weight of water are used as emulsifier. The polymerization rate was 11% conversion per minute and no coagulate was obtained.
Pre porovnanie účinku laurylsulfátu sodného s niektorým doteraz používaným emulgátorom t.j. sodnou solou oktadekán-l-onylsufónovej kyseliny, uvádzame nasledovný příkladní. Čapek,. J. Bartoň, V. Svoboda, V. Novotný, L. Q. Tauan,: Makromol. Chem. 188, 1 723 (1987)J:To compare the effect of sodium lauryl sulfate with some of the emulsifiers used hitherto, i.e., octadecan-1-onylsulfonic acid sodium salt, the following example is given. Čapek ,. J. Barton, V. Svoboda, V. Novotny, L. Q. Tauan, Macromol. Chem. 188, 1723 (1987) J:
Příklad 4Example 4
Postupuje sa ako v přiklade 1 s tým rozdielom, že sa použije ako emulgátor 2 hmotnostně diely sodnej soli oktadekán-l-enylsulfónovej kyseliny, 240 g etylakrylátu a 180 g metylmetakrylátu. Rýchlosť polymerizácie je 3 % konverzie za minutú a 3 g fxnálného koagulátu.The procedure is as in Example 1 except that parts by weight of octadecan-1-enylsulfonic acid sodium salt, 240 g of ethyl acrylate and 180 g of methyl methacrylate are used as emulsifier 2. The polymerization rate was 3% conversion per minute and 3 g of final coagulate.
Vynález móže nájsť použitie v chémii přípravy polymérových disperzií pri formulovaní stabiIných latexových prípravkov.The invention may find use in the chemistry of preparing polymer dispersions in formulating stable latex formulations.
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| Application Number | Priority Date | Filing Date | Title |
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| CS878358A CS262648B1 (en) | 1987-11-20 | 1987-11-20 | Process for preparing terpolymoric ethyl acrylate-methyl methacrylate-acrylonitrile latex |
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| CS878358A CS262648B1 (en) | 1987-11-20 | 1987-11-20 | Process for preparing terpolymoric ethyl acrylate-methyl methacrylate-acrylonitrile latex |
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| CS835887A1 CS835887A1 (en) | 1988-07-15 |
| CS262648B1 true CS262648B1 (en) | 1989-03-14 |
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| CS835887A1 (en) | 1988-07-15 |
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