Embodiment
The method of preparing hyperbranched ionic amide type polymer by inverse emulsion polymerization of the present invention shifts (RAFT) inverse emulsion polymerization method by semicontinuous reversible addition-fracture, because used the special chain transfer agent that chain transfer constant is high in RAFT polymerization process, the regeneration of reversible addition-fracture occurs for this chain-transfer agent and Propagating Radical shifts, keep free radical activity, realize controlled and radical polymerization " activity ", and can regulate and control the structure of polymkeric substance.Simultaneously, employing adds the operating procedure of follow-up phase, can obtain the outer end of branched chain and be ionic comonomer block or macroion degree copolymerization block hyperbranched ionic acylamide polymer, use in conjunction with low proportioning chain-transfer agent, polyreaction is easily controlled, and can highly transform the stabilized latex that ground forms high solids content.
Specifically, the method for preparing hyperbranched ionic amide type polymer by inverse emulsion polymerization of the present invention, comprises the following steps:
One, preparation external phase: at ambient temperature, oil-soluble emulsifier, polymeric surface active agent are dissolved in to solvent oil, mix;
Solvent oil comprises the liquefied hydrocarbon of aromatic series, cycloalkane, aliphatic category and containing substituent compound, comprises isoparaffin, 120# solvent oil, 200# solvent oil, kerosene, whiteruss, white oil a kind of and composition thereof of tetrachloroethylene, tetracol phenixin, toluene, benzene, dimethylbenzene, octane, dodecane, the tetradecane, different carbon chain.The mass ratio of controlling water in solvent oil and disperse phase is 0.5-2:2-0.5.
The mass ratio of oil-soluble emulsifier, polymeric surface active agent, solvent oil is controlled at 0.4-15:0.01-12:8-68; Wherein oil-soluble emulsifier comprises dehydrated sorbitol mono-fatty acid ester, sorbitan monostearate, heavy wool acid polyglycerol ester and Zerol etc. and composition thereof.Polymeric surface active agent is a kind of amphipathic nature polyalcohol, in polymkeric substance, there is hydrophilic, lipophilic group simultaneously, comprise oxyethylene-propylene oxide block copolymer, ten dihydroxystearic acids-epoxyethane block copolymer, acrylate-acrylamide copolymer, acrylate-acrylic copolymer, acrylate-Sipacril 2739OF, acrylate-dimethyl diene ammonium chloride copolymer, acrylate-dimethylaminoethyl methacrylate quaternized copolymer and composition thereof.
Two, preparation disperse phase: water soluble emulsifier, amides monomer, ionic comonomer, RAFT chain-transfer agent, initiator are dissolved in water, are mixed with disperse phase; The mass ratio that wherein water soluble emulsifier, amides monomer, ionic comonomer, RAFT chain turn between agent, initiator, water is controlled at 0.4-15:0-45:0.01-45:0.00045-0.45:0.00009-0.45:3-65;
Water soluble emulsifier is nonionic surface active agent, comprise dehydration sorb sugar ester ethylene oxide adduct, alkyl alcohol or alkylphenol ethylene oxide adduct etc., as Polysorbate 80, polyoxyethylene oleic acid base ether, polyoxyethylene stearyl acid amides, polyoxyethylene nonylplenyl ether etc. and composition thereof.
Amides monomer comprises the two substituted acrylamides of acrylamide, Methacrylamide, N-, N methacrylamide, NIPA, N-acryloyl morpholine, N-(2-hydroxypropyl) acrylamide, N-acryloyl tetramethyleneimine, N-vinyl formamide, NVP etc.
Ionic comonomer comprises anionic monomer, cationic monomer and amphipathic water-soluble monomer.Described anionic monomer comprises vinylformic acid, methacrylic acid, ethylacrylic acid, propyl group vinylformic acid, to vinylbenzenesulfonic acid (sodium), to vinyl benzoic acid etc.; Described cationic monomer comprises dimethyl diallyl ammonium chloride, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, N-dimethyl ethenylphenyl ammonia and quaternary ammonium salt thereof, 2-vinyl pyridine, 4-vinylpridine etc.; Described amphipathic water-soluble monomer comprises N-(3-sulfonic acid propyl group) 2-vinyl pyridine, 2-acrylyl oxy-ethyl phosphorylcholine etc.
RAFT chain-transfer agent is dithio or trithio compound, comprising dithiobenzoic acid ester class, trithiocarbonic acid salt, dithiocarbamate(s), xanthate class etc.Described dithioesters class link transfer agent comprises 4-cyanopentanoic acid dithiobenzoic acid ester.The different base dithiobenzoic acid of 2-cyano group third ester, 2-(2-hydroxyethanoic acid dithio carbonylsulfide) propionic acid, 4-cyano group-4-(diethyl thiocarbamyl sulphur) valeric acid, 2-methoxyethyl 2-phenyl-2-(amyl group thio-carbonyl sulfide) acetic ester etc.Described trithiocarbonate comprises (3-benzene first sulfydryl thio-carbonyl sulfide) propionic acid, 2-(second sulfydryl thio-carbonyl sulfide)-2 Methylpropionic acid, 3-((1-carboxyl second sulfydryl) thio-carbonyl sulfide) propionic acid, 2,2 '-thiocarbonyls two (sulfanyl) two (2 Methylpropionic acid) etc., xanthogenic acid 0 ester class is as xanthogenic acid guanidine-acetic acid, (2-(acetoxyl group) methyl) xanthogen phenylformic acid etc.
Initiator can be the various initiators that are applicable to polar solvent system, as chemical initiator, and photochemical initiators, radiation initiators etc.Chemical initiator when had peroxide initiator, azo-initiator, oxidation-reduction initiator etc.Conventional peroxide initiator comprises ammonium persulphate, Potassium Persulphate etc., and azo-initiator comprises 4,4 '-azo two (4-cyanopentanoic acid), azo diisobutyl amidine hydrochlorides, azo di-isopropyl mew quinoline hydrochloride, azo di-isopropyl mew quinoline etc.Described photochemical initiators comprises (2-hydroxyl-1-[4-(hydroxyl) phenyl]-2-methyl isophthalic acid-acetone) etc.
Three, prepare follow-up phase: amides monomer and dienes monomer are mixed with to the follow-up phase of the aqueous solution, follow-up two portions that divide mutually: the mass ratio between the amides monomer of the follow-up phase of first part, dienes monomer, water is controlled at 0.01-45:0-5:1-40; Mass ratio between the amides monomer of the follow-up phase of second section, dienes monomer, water is controlled at 0.01-45:0-5:1-40; First part is follow-up is controlled at 0.1-5:0.1-5 with the mass ratio of the follow-up phase of second section;
Dienes compound comprises symmetry and asymmetry vinyl compound; Conventional dienes compound comprises N, N '-methylene-bisacrylamide, diacrylate macrogol ester, Ethylene glycol dimethacrylate etc.Described asymmetric dienes compound comprises (methyl) vinylformic acid vinyloxy group macrogol ester etc.
Four, under room temperature, mechanical stirring condition, disperse phase is joined in external phase gradually, mix pre-emulsification, letting nitrogen in and deoxidizing 30 minutes; Add the temperature that raises after initiator, under 25-80 ℃ of condition, carry out polyreaction; React after 0.5-5 hour, 0-3 hour follow-up being added in reaction system of Nei Jiang first part; Continue reaction after 1-3 hour, in 0-3 hour, be added in reaction system second section is follow-up, continue reaction 1-3 hour, prepare hyperbranched ionic acylamide polymer.
Described emulsifying agent in step 1 and step 2 is nonionic surface active agent.In described step 1, described oil-soluble emulsifier comprises dehydrated sorbitol mono-fatty acid ester, sorbitan monostearate, heavy wool acid polyglycerol ester and Zerol etc.; In described step 2, water soluble emulsifier comprises Polysorbate 80, polyoxyethylene oleic acid base ether, polyoxyethylene stearyl acid amides and polyoxyethylene nonylplenyl ether etc., and the hydrophile-lipophile balance value of composite rear emulsifying agent (HLB) is worth between 2-7.
Polymerization temperature is controlled between 25 ℃ to 80 ℃, react after 0.5-5 hour, 0-3 hour the follow-up of Nei Jiang first part, be added in reaction system, continue reaction after 1-3 hour, in second section follow-up being added to reaction system in 0-3 hour, continue reaction 1-3 hour, total reaction time was controlled between 5-17 hour.The final hyperbranched ionic acylamide polymer obtaining be emulsion total amount 5% to 60% between.
Below by specific examples, further illustrate the present invention program and result, but can not think that the present invention only limits in these examples.In example, except specified otherwise, all marks and percentage ratio are all weight ratios.
Embodiment 1
In 100ml there-necked flask, add 1.2 parts of ten dihydroxystearic acids-epoxyethane block copolymers, 1.56 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 3.175 parts of acrylamides, 3.3 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0348 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.24 part of Tween80 are dissolved in 6.26 parts of water (PH=7), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0292 part of over cure ammonium, is warming up to 50 ℃, adds 0.0137 part of sodium bisulfite to start reaction.React after 3 hours, 1.9 parts of acrylamides are dissolved in 1.5 parts of water, add reaction system, react again after 3 hours, by 1.27 parts of acrylamides and 0.0197 part of N, N '-methylene-bisacrylamide is dissolved in 1 part of water, and the constant rate of speed with 6ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched Polyacrylamide latex.
In this embodiment, the transformation efficiency of polymerization system is 96.5%, its weight-average molecular weight is 2.80 * 10
5, molecular weight distribution is 1.61, the parameter g ' of polymkeric substance branching degree can characterize the degree of branching of molecule, g '=1 of linear polymer, and the g ' <1 of branching molecule for 0.712(g '; Degree of branching is higher, and g ' is less), the flocculating property of sample represents with relative turbidity, the relative turbidity Tr=T/To of Tr=0.453(, To is initial TiO
2the turbidity of turbid solution, T is the TiO adding after sample flocculation agent for some time
2the turbidity of turbid solution, adds 1mg polymer samples/g TiO
2, flocculation time is 30min).
Embodiment 2
In 100ml there-necked flask, add 0.9 part of ten dihydroxystearic acids-epoxyethane block copolymer, 2.04 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 1.82 parts of acrylamides, 5.55 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0145 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.06 part of Tween80 are dissolved in 4 parts of water (PH=4.4), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0122 part of over cure ammonium, is warming up to 50 ℃, adds 0.0066 part of sodium bisulfite to start reaction.React after 0.5 hour, by 1.37 parts of acrylamides and 0.0082 part of N, N '-methylene-bisacrylamide is dissolved in 1.8 parts of water, add reaction system, react after 1 hour, by 1.37 parts of acrylamides and 0.041 part of N, N '-methylene-bisacrylamide is dissolved in 1.5 parts of water again, constant rate of speed with 6ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched Polyacrylamide latex.
In this embodiment, the transformation efficiency of polymerization system is 86.7%, its weight-average molecular weight is 6.43 * 10
5, molecular weight distribution is 1.5, the parameter g ' of polymkeric substance branching degree is 0.722, the flocculating property of sample represents with relative turbidity, Tr=0.157.
Implementation column 3
The solid content of maintenance system is constant, reduces the content of cationic monomer MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, and ion degree is reduced to 15% from 25% of example 2.
In 100ml there-necked flask, add 0.9 part of ten dihydroxystearic acids-epoxyethane block copolymer, 2.04 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 2.36 parts of acrylamides, 3.88 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0103 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.06 part of Tween80 are dissolved in 4 parts of water (PH=4.4), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0086 part of over cure ammonium, is warming up to 50 ℃, adds 0.0047 part of sodium bisulfite to start reaction.React after 0.5 hour, by 1.77 parts of acrylamides and 0.0082 part of N, N '-methylene-bisacrylamide is dissolved in 1.8 parts of water, adds reaction system.React again after 3 hours, by 1.77 parts of acrylamides and 0.0246 part of N, N '-methylene-bisacrylamide is dissolved in 1.5 parts of water, and the constant rate of speed with 6.7ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched cationic-type polyacrylamide latex.The transformation efficiency of polymerization system is 96%, its weight-average molecular weight is 1.22 * 10
6, molecular weight distribution is 1.18, the parameter g ' of polymkeric substance branching degree is 0.675, the flocculating property of sample represents with relative turbidity, Tr=0.339.
Embodiment 4
In 100ml there-necked flask, add 0.9 part of ten dihydroxystearic acids-epoxyethane block copolymer, 2.04 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 1.37 parts of acrylamides, 5.55 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0146 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.06 part of Tween80 are dissolved in 4 parts of water (PH=4.4), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0122 part of over cure ammonium, is warming up to 50 ℃, adds 0.0066 part of sodium bisulfite to start reaction.React after 1 hour, 1.82 parts of acrylamides are dissolved in 1.8 parts of water, add reaction system, react again after 1.5 hours, by 1.37 parts of acrylamides and 0.0412 part of N, N '-methylene-bisacrylamide is dissolved in 1.5 parts of water, and the constant rate of speed with 6ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched cationic-type polyacrylamide latex.
In this embodiment, the transformation efficiency of polymerization system is 90.8%, its weight-average molecular weight is 5.93 * 10
5, molecular weight distribution is 1.74, the parameter g ' of polymkeric substance branching degree is 0.628, the flocculating property of sample represents with relative turbidity, Tr=0.325.
Embodiment 5
In 100ml there-necked flask, add 0.9 part of ten dihydroxystearic acids-epoxyethane block copolymer, 2.04 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 1.82 parts of acrylamides, 5.55 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0146 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.06 part of Tween80 are dissolved in 4 parts of water (PH=4.4), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0122 part of over cure ammonium, is warming up to 50 ℃, adds 0.0066 part of sodium bisulfite to start reaction.React after 1 hour, 0.46 part of acrylamide is dissolved in 1.8 parts of water, add reaction system, react again after 1.5 hours, by 2.28 parts of acrylamides and 0.0412 part of N, N '-methylene-bisacrylamide is dissolved in 1.5 parts of water, and the constant rate of speed with 7.6ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched cationic-type polyacrylamide latex.
In this embodiment, the transformation efficiency of polymerization system is 89.7%, its weight-average molecular weight is 4.53 * 10
5, molecular weight distribution is 1.8, the parameter g ' of polymkeric substance branching degree is 0.780, the flocculating property of sample represents with relative turbidity, Tr=0.163.
Embodiment 6
In 100ml there-necked flask, add 0.9 part of ten dihydroxystearic acids-epoxyethane block copolymer, 2.04 parts of Span80,8.58 parts of isoparaffins, mechanical stirring mixes and letting nitrogen in and deoxidizing, is mixed with external phase.By 1.82 parts of acrylamides, 5.55 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride aqueous solution (80wt%), 0.0146 part of thin base thiocarbonyl propionic acid of 3-benzene first, 0.06 part of Tween80 are dissolved in 4 parts of water (PH=4.4), are mixed with disperse phase.It is 400 revs/min that stirring velocity is set, and at ambient temperature, disperse phase constant speed is added dropwise to external phase in 1 hour, obtains monomer emulsion, adds 0.0122 part of over cure ammonium, is warming up to 50 ℃, adds 0.0066 part of sodium bisulfite to start reaction.React after 0.5 hour, by 2.74 parts of acrylamides and 0.0246 part of N, N '-methylene-bisacrylamide is dissolved in 3.3 parts of water, and the constant rate of speed with 8.5ml/h in 28min is added drop-wise in reaction system, obtains stable hyperbranched cationic-type polyacrylamide latex.
In this embodiment, the transformation efficiency of polymerization system is 85.9%, its weight-average molecular weight is 5.05 * 10
5, molecular weight distribution is 1.18, the parameter g ' of polymkeric substance branching degree is 0.816, the flocculating property of sample represents with relative turbidity, Tr=0.39.
Above-described embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change that the present invention is made, all fall into protection scope of the present invention.