CN102653578A - Method for synthesizing styrene-maleic anhydride polymer through precipitation - Google Patents
Method for synthesizing styrene-maleic anhydride polymer through precipitation Download PDFInfo
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- CN102653578A CN102653578A CN201110051524XA CN201110051524A CN102653578A CN 102653578 A CN102653578 A CN 102653578A CN 201110051524X A CN201110051524X A CN 201110051524XA CN 201110051524 A CN201110051524 A CN 201110051524A CN 102653578 A CN102653578 A CN 102653578A
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Abstract
The invention discloses a method for synthesizing a styrene-maleic anhydride polymer through precipitation. The method comprises the following steps: (1) adding maleic anhydride and an initiator to 70ml-90ml of solvent to be dissolved; (2) dissolving styrene in the 70ml-90ml of solvent, mixing while heating to 65-80 DEG C, and conducting heat preservation; (3) mixing a polymerization inhibitor with 30ml-50ml of solvent, mixing while heating to 65-80 DEG C, and conducting heat preservation; (4) heating solution obtained in the step (1) to 65-80 DEG C, dropwise adding solution obtained in the step (2) while dropwise adding solution obtained in the step (3), heating to 75-90 DEG C after dropwise adding, conducting heat preservation, and reacting for 1.8h-3h under stirring to obtain a dispersion system of an LMW (low molecular weight) styrene-maleic anhydride polymer; and (5) conducting suction filtering, and vacuum-drying at 60-80 DEG C to obtain an LMW maleic anhydride copolymer, with number-average molecular weight of 5000-10000. The method is achieved by adopting a simple method so as to enable the molecular weight distribution of a copolymer obtained by reaction to be narrow.
Description
Technical field
The present invention relates to the method that a kind of maleic anhydride MA and vinylbenzene St carry out copolyreaction, be specifically related to a kind of maleic anhydride MA and vinylbenzene St prepare low molecular weight phenylethylene-maleic anhydride through precipitation polymerization method.
Technical field
The present invention relates to the method that a kind of maleic anhydride MA and vinylbenzene St carry out copolyreaction, be specifically related to a kind of maleic anhydride MA and vinylbenzene St prepare low molecular weight phenylethylene-maleic anhydride through precipitation polymerization method.
Background technology
Background technology
Low molecular weight phenylethylene-copolymer-maleic anhydride is a kind of polymkeric substance with extensive use, can make the protective colloid of paper surface sizing agent, pigment dyestuff dispersion agent, letex polymerization etc. respectively in industries such as papermaking, weaving, printing and dyeing, coating, chemical industry.
At present, the preparation method of styrene-maleic anhydride copolymer mainly contains solution polymerization, a spot of mass polymerization, body-suspension polymerization, precipitation polymerization.Wherein, precipitation polymerization is compared with other polymerization methods, has simple, the low cost and other advantages of aftertreatment technology.
As; Xiao Cuiling is in " synthesizing of low molecular weight phenylethylene-copolymer-maleic anhydride "; (" Heilungkiang petrochemical complex ", 2000,11 (1); Pp.15-17) be that initiator, lauryl mercaptan are molecular weight regulator to cross Diisopropyl azodicarboxylate (AIBN) in the literary composition, synthesized styrene-maleic anhydride copolymer through the method for precipitation polymerization.Deng Jianyuan in " a kind of compound method of low molecular weight phenylethylene/maleic anhydride alternate copolymer " (" Chinese patent " CN101503490A) through using alpha-methyl styrene or vinyl-acetic ester to reduce the molecular weight of SMA resin as molecular weight regulator, synthetic low-molecular-weight alternate styrene-maleic anhydride copolymer.
But the synthetic low molecular weight phenylethylene-copolymer-maleic anhydride of the present precipitation polymerization of reporting generally adopts molecular weight regulator, and solvent is toluene and YLENE, and the distribution of molecular weight of product is than broad, molecular weight 6--180,000.
Summary of the invention
The object of the invention just is to overcome the method that above-mentioned deficiency provides a kind of precipitator method synthesizing styrene-maleic anhydride polymkeric substance.
The object of the invention can be realized through following technical scheme:
The method of a kind of precipitator method synthesizing styrene-maleic anhydride polymkeric substance may further comprise the steps:
(1). maleic anhydride and initiator join in the solvent of 70ml-90ml and dissolve;
(2). vinylbenzene is dissolved in the 70ml-90ml solvent, stirs to be heated to 65 ℃ of-80 ℃ of insulations simultaneously;
(3). stopper and 30ml-50ml solvent, stir and be heated to 65 ℃ of-80 ℃ of insulations simultaneously;
(4). when step (1) gained solution is heated to 65 ℃-80 ℃; Drip step (2) gained solution on one side, Yi Bian the step of dropping (3) gained solution drips post-heating to 75 ℃-90 ℃ of insulations; Stirring reaction 1.8h-3h, the sub-weight phenylethylene that makes low score-maleic anhydride polymer dispersed system;
(5). suction filtration, 60 ℃ of-80 ℃ of vacuum-dryings obtain lower molecular weight-copolymer-maleic anhydride, and the number-average molecular weight of multipolymer is 5000-10000;
Said reaction system comprises two kinds of monomer maleic anhydrides and vinylbenzene, initiator, solvent and stopper; The total amount of solvent is 200ml in the reaction system; The quality of two kinds of monomer styrenes and maleic anhydride and be 12.5 ~ 25% of solvent total mass in the reaction system; And vinylbenzene is 1 to 1 with the mass ratio of maleic anhydride, in the reaction system amount of initiator be two kinds of monomer masses and 3%, in the reaction system amount of stopper be two kinds of monomer masses and 3%;
Said solvent is any in benzene,toluene,xylene, chlorobenzene or the bromobenzene; The total amount of solvent is 200ml; Said initiator is superoxide or azo cpd; Superoxide is any in Lucidol, Di Cumyl Peroxide 99, di-tert-butyl peroxide, dilauroyl peroxide, the special butyl ester of peroxo-phenylformic acid, peroxy dicarbonate diisopropyl ester or the di-cyclohexylperoxy dicarbonate; Azo cpd has Diisopropyl azodicarboxylate or ABVN, said stopper be sulfurous organic compound be lauryl mercaptan, sulfur alcohol, propylmercaptan, 1 one butyl sulfhydryl, in the chlorobenzene mercaptan any.
The method of above-mentioned precipitator method synthesizing styrene-maleic anhydride polymkeric substance may further comprise the steps:
(1). maleic anhydride and initiator join in the solvent of 70ml-90ml and dissolve;
(2). vinylbenzene is dissolved in the 70ml-90ml solvent, stirs to be heated to 75 ℃ of insulations simultaneously;
(3). stopper and 30ml-50ml solvent, stir and be heated to 75 ℃ of insulations simultaneously;
(4). when step (1) gained solution is heated to 65 ℃-80 ℃; Drip step (2) gained solution on one side, Yi Bian the step of dropping (3) gained solution drips post-heating to 75 ℃-90 ℃ of insulations; Stirring reaction 2h, the sub-weight phenylethylene that makes low score-maleic anhydride polymer dispersed system;
(5). suction filtration, 75 ℃ of vacuum-dryings obtain lower molecular weight-copolymer-maleic anhydride, and the number-average molecular weight of multipolymer is 5000-10000.
Adopt technique scheme, the present invention has following advantage:
The present invention adopts easy method to accomplish; Make solvent with solvent; Need not to use special solvent, solvent all has good solvency action for maleic anhydride and vinylbenzene two kinds of monomers, initiator and stoppers, can be homogeneous system before the guarantee system reaction.And solvent can not dissolve for vinylbenzene that is generated and maleic anhydride alternate copolymer, after the molecular chain of multipolymer reaches certain critical length just from solvent precipitating come out.The narrow mwd copolymer that reaction is obtained, the molecular weight of multipolymer is 5000-10000, can not be dissolved in the reaction solvent again simultaneously, and aftertreatment is simple, and solvent can be recycled.Polymeric reaction temperature adopts the decomposition temperature greater than initiator on the other hand, but is lower than the temperature reacting by heating system of solvent boiling point, thereby reaches the purpose of the molecular weight that reduces styrene-maleic anhydride copolymer.The stopper that the present invention uses not only can use by stopper, has the effect of molecular weight regulator simultaneously, can further reduce polymericular weight.
Embodiment
Embodiment 1: get the raw materials ready: monomer maleic anhydride MA10.8g, vinylbenzene St10.8g; Initiator Lucidol BPO0.65g; Stopper Dodecyl Mercaptan 0.65g; Solvent toluene 200ml,
Synthesizing of multipolymer: MA, BPO and 70ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 65 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 70ml solvent; At the uniform velocity drip the solution of Dodecyl Mercaptan and 60ml solvent simultaneously in the 1h, dropwise back 75 ℃ and continue stirring reaction 1.8h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 60 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 2: get the raw materials ready: monomer maleic anhydride MA21.8g, vinylbenzene St 21.8g; Initiator Lucidol BPO1.3g; Stopper Dodecyl Mercaptan 1.3g; Solvent toluene 200ml,
Synthesizing of multipolymer: MA, BPO and 90ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 80 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 30ml solvent simultaneously in the 1h, dropwise back 90 ℃ and continue stirring reaction 3h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 80 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 3: get the raw materials ready: monomer M A 16.5g, St 16.5g; Initiator Lucidol BPO1.0g; Stopper Dodecyl Mercaptan 1.0g; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 73 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 83 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 70 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 4: get the raw materials ready: monomer M A 17.4g, St 17.4g; Initiator Lucidol BPO1.1g; Stopper Dodecyl Mercaptan 1.1g; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 82ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 73 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 81ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 37ml solvent simultaneously in the 1h, dropwise back 83 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 70 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 5: get the raw materials ready: monomer M A 11.3g, St 11.3g, initiator Lucidol BPO0.68g; Stopper Dodecyl Mercaptan 0.68g; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 73 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 83 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 70 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 6: get the raw materials ready: monomer M A 20.9g, St 20.9g, initiator B PO (Lucidol) 1.3g; Stopper Dodecyl Mercaptan 1.3g; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 73 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 83 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 70 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 7
Get the raw materials ready: monomer M A 25.0001g, St 27.80ml, both mass ratioes are 1:1; Initiator B PO 0.692ml; Stopper Dodecyl Mercaptan 0.888ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 75 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 8
Get the raw materials ready: monomer maleic anhydride MA 19.9858g, vinylbenzene St 22.00ml, both mass ratioes are 1:1; Initiator Lucidol BPO 0.554ml; Stopper Dodecyl Mercaptan 0.710ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 80 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 9
Get the raw materials ready: monomer M A 16.6780g, St 19.10ml, both mass ratioes are 1:1; Initiator B PO 0.462ml; Stopper Dodecyl Mercaptan 0.592ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 85 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-10000.
Embodiment 10
Get the raw materials ready: monomer M A 14.2896g, St 15.70ml, both mass ratioes are 1:1; Initiator B PO 0.396ml; Stopper Dodecyl Mercaptan 0.507ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 90 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000---10000.
Embodiment 11
Get the raw materials ready: monomer M A 26.0001g and vinylbenzene St, both mass ratioes are 1:1; Initiator B PO 0.8ml; Stopper Dodecyl Mercaptan 1ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 70ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 65 ℃ heats, then in 0.8h, at the uniform velocity drips the solution of St and 90ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 0.8h, dropwise back 75 ℃ and continue stirring reaction 1.8h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 60 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000--7000.
Embodiment 12
Get the raw materials ready: monomer M A 26.0001g and vinylbenzene St, both mass ratioes are 1:1; Initiator B PO 0.8ml; Stopper Dodecyl Mercaptan 1ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 90ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 800 ℃ heats, then in 1.2h, at the uniform velocity drips the solution of St and 80ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 30ml solvent simultaneously in the 1.2h, dropwise back 90 ℃ and continue stirring reaction 2.5h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 80 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000-7000.
Embodiment 13
Get the raw materials ready: monomer M A 26.0001g and vinylbenzene St, both mass ratioes are 1:1; Initiator B PO 0.8ml; Stopper Dodecyl Mercaptan 1ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 80ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 70ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 50ml solvent simultaneously in the 1h, dropwise back 75 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain the white powder that molecular weight is the styrene-maleic anhydride copolymer of 5000---10000.
Embodiment 14
Get the raw materials ready: monomer M A 26.0001g and vinylbenzene St, both mass ratioes are 1:1; Initiator B PO 0.8ml; Stopper Dodecyl Mercaptan 1ml; Solvent toluene 200ml.
Synthesizing of multipolymer: MA, BPO and 70ml solvent are placed the there-necked flask that has whipping appts; After the stirring at normal temperature; The thermostat water bath that adopts 75 ℃ heats, then in 1h, at the uniform velocity drips the solution of St and 90ml solvent; At the uniform velocity drip the appearance solution of Dodecyl Mercaptan and 40ml solvent simultaneously in the 1h, dropwise back 75 ℃ and continue stirring reaction 2h, obtain the dispersion system of styrene-maleic anhydride copolymer; With dispersion system suction filtration, 75 ℃ of vacuum-dryings while hot, obtain molecular weight and be the white powder of 5000-10000 styrene-maleic anhydride copolymer.
Solvent can also be selected any in benzene, YLENE, chlorobenzene or the bromobenzene for use in the foregoing description; Initiator can also be selected superoxide or azo cpd for use; Superoxide is any in Di Cumyl Peroxide 99, di-tert-butyl peroxide, dilauroyl peroxide, the special butyl ester of peroxo-phenylformic acid, peroxy dicarbonate diisopropyl ester or the di-cyclohexylperoxy dicarbonate; Azo cpd has Diisopropyl azodicarboxylate AIBN or ABVN; Stopper can also select sulfur alcohol, propylmercaptan, 1 one butyl sulfhydryl for use, to any sulfurous organic compound in the chlorobenzene mercaptan; The total amount of solvent is 200ml in the reaction system, the quality of two kinds of monomer styrenes and maleic anhydride and for the mass ratio of 12.5 ~ 25% and vinylbenzene of solvent total mass and maleic anhydride is 1 to 1 in the reaction system, in the reaction system quality of initiator be two kinds of monomer masses and 3%; In the reaction system stopper quality be two kinds of monomer masses and 3%, all can reach the object of the invention.
The present invention is the molecular weight that adopts Ubbelohde viscometer to record.
Claims (2)
1. the method for precipitator method synthesizing styrene-maleic anhydride polymkeric substance is characterized in that: may further comprise the steps:
(1). maleic anhydride and initiator join in the solvent of 70ml-90ml and dissolve;
(2). vinylbenzene is dissolved in the 70ml-90ml solvent, stirs to be heated to 65 ℃ of-80 ℃ of insulations simultaneously;
(3). stopper and 30ml-50ml solvent, stir and be heated to 65 ℃ of-80 ℃ of insulations simultaneously;
(4). when step (1) gained solution is heated to 65 ℃-80 ℃; Drip step (2) gained solution on one side, Yi Bian the step of dropping (3) gained solution drips post-heating to 75 ℃-90 ℃ of insulations; Stirring reaction 1.8h-3h, the sub-weight phenylethylene that makes low score-maleic anhydride polymer dispersed system;
(5). suction filtration, 60 ℃ of-80 ℃ of vacuum-dryings obtain lower molecular weight-copolymer-maleic anhydride, and the number-average molecular weight of multipolymer is 5000-10000;
Said reaction system comprises two kinds of monomer maleic anhydrides and vinylbenzene, initiator, solvent and stopper; The total amount of solvent is 200ml in the reaction system; The quality of two kinds of monomer styrenes and maleic anhydride and be 12.5 ~ 25% of solvent total mass in the reaction system; And vinylbenzene is 1 to 1 with the mass ratio of maleic anhydride, in the reaction system amount of initiator be two kinds of monomer masses and 3%, in the reaction system amount of stopper be two kinds of monomer masses and 3%;
Said solvent is any in benzene,toluene,xylene, chlorobenzene or the bromobenzene; The total amount of solvent is 200ml; Said initiator is superoxide or azo cpd; Superoxide is any in Lucidol, Di Cumyl Peroxide 99, di-tert-butyl peroxide, dilauroyl peroxide, the special butyl ester of peroxo-phenylformic acid, peroxy dicarbonate diisopropyl ester or the di-cyclohexylperoxy dicarbonate; Azo cpd has Diisopropyl azodicarboxylate or ABVN, said stopper be sulfurous organic compound be lauryl mercaptan, sulfur alcohol, propylmercaptan, 1 one butyl sulfhydryl, in the chlorobenzene mercaptan any.
2. the method for precipitator method synthesizing styrene according to claim 1-maleic anhydride polymkeric substance is characterized in that: may further comprise the steps:
(1). maleic anhydride and initiator join in the solvent of 70ml-90ml and dissolve;
(2). vinylbenzene is dissolved in the 70ml-90ml solvent, stirs to be heated to 75 ℃ of insulations simultaneously;
(3). stopper and 30ml-50ml solvent, stir and be heated to 75 ℃ of insulations simultaneously;
(4). when step (1) gained solution is heated to 65 ℃-80 ℃; Drip step (2) gained solution on one side, Yi Bian the step of dropping (3) gained solution drips post-heating to 75 ℃-90 ℃ of insulations; Stirring reaction 2h, the sub-weight phenylethylene that makes low score-maleic anhydride polymer dispersed system;
(5). suction filtration, 75 ℃ of vacuum-dryings obtain lower molecular weight-copolymer-maleic anhydride, and the number-average molecular weight of multipolymer is 5000-10000.
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| CN103923247A (en) * | 2013-01-11 | 2014-07-16 | 上海飞凯光电材料股份有限公司 | Styrene-maleic anhydride copolymer production process |
| CN105175598A (en) * | 2015-08-12 | 2015-12-23 | 莘县阳光包装材料有限公司 | Synthesis method of SMA resin with low molecular weight |
| CN107337746A (en) * | 2016-11-16 | 2017-11-10 | 上海化工研究院有限公司 | Contain chain-transferring agent of epoxide group and preparation method and application in a kind of end |
| CN108329416A (en) * | 2018-02-12 | 2018-07-27 | 广东轻工职业技术学院 | A kind of paper mill base dispersant with high efficiency and its preparation method and application |
| CN109575172A (en) * | 2018-12-11 | 2019-04-05 | 三明学院 | A kind of low molecular weight phenylethylene copolymer-maleic anhydride and preparation method thereof |
| CN112694554A (en) * | 2021-01-11 | 2021-04-23 | 浙江阿尔法化工科技有限公司 | Synthesis method and production equipment of SMA resin |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923247A (en) * | 2013-01-11 | 2014-07-16 | 上海飞凯光电材料股份有限公司 | Styrene-maleic anhydride copolymer production process |
| CN105175598A (en) * | 2015-08-12 | 2015-12-23 | 莘县阳光包装材料有限公司 | Synthesis method of SMA resin with low molecular weight |
| CN107337746A (en) * | 2016-11-16 | 2017-11-10 | 上海化工研究院有限公司 | Contain chain-transferring agent of epoxide group and preparation method and application in a kind of end |
| CN107337746B (en) * | 2016-11-16 | 2018-09-28 | 上海化工研究院有限公司 | Chain-transferring agent of epoxy group and the preparation method and application thereof is contained in a kind of end |
| CN108329416A (en) * | 2018-02-12 | 2018-07-27 | 广东轻工职业技术学院 | A kind of paper mill base dispersant with high efficiency and its preparation method and application |
| CN109575172A (en) * | 2018-12-11 | 2019-04-05 | 三明学院 | A kind of low molecular weight phenylethylene copolymer-maleic anhydride and preparation method thereof |
| CN109575172B (en) * | 2018-12-11 | 2021-01-05 | 三明学院 | Low molecular weight styrene maleic anhydride copolymer and preparation method thereof |
| CN112694554A (en) * | 2021-01-11 | 2021-04-23 | 浙江阿尔法化工科技有限公司 | Synthesis method and production equipment of SMA resin |
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