CN102786620B - Small-particle-size carboxylic styrene-butadiene latex and its preparation method - Google Patents
Small-particle-size carboxylic styrene-butadiene latex and its preparation method Download PDFInfo
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- 239000004816 latex Substances 0.000 title claims abstract description 102
- 229920000126 latex Polymers 0.000 title claims abstract description 102
- 239000002174 Styrene-butadiene Substances 0.000 title claims abstract description 59
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000011115 styrene butadiene Substances 0.000 title claims abstract description 59
- 229920003048 styrene butadiene rubber Polymers 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 49
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 31
- 239000003999 initiator Substances 0.000 claims abstract description 19
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000178 monomer Substances 0.000 claims abstract description 17
- 239000008234 soft water Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 15
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims description 21
- -1 sodium alkyl sulfate Chemical class 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000006116 polymerization reaction Methods 0.000 claims description 14
- 239000003153 chemical reaction reagent Substances 0.000 claims description 13
- 239000006174 pH buffer Substances 0.000 claims description 13
- 239000003352 sequestering agent Substances 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 12
- 239000012874 anionic emulsifier Substances 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- LVHBHZANLOWSRM-UHFFFAOYSA-N itaconic acid Chemical compound OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 229940077388 benzenesulfonate Drugs 0.000 claims description 3
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 6
- 238000007720 emulsion polymerization reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 239000002738 chelating agent Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000007872 degassing Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000006179 pH buffering agent Substances 0.000 abstract 1
- 239000002861 polymer material Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 125000002877 alkyl aryl group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention belongs to the technical field of seed emulsion polymerization, relates to a preparation of a high polymer material, and especially relates to a small-particle-size carboxylic styrene-butadiene latex and its preparation method. Technical problems comprising unadjustable particle size, bad mechanical stability, bad chemical stability and the like of latexes in the prior art are solved in the invention. The preparation method which adopts a seed emulsion polymerization technology and adopts butadiene and styrene as monomers comprises the following steps: adding soft water, a seed latex, an electrolyte, a chelating agent and a pH buffering agent; heating; adding functional monomers, unsaturated carboxylic acid, a molecular weight adjustment agent, a composite emulsifier and an initiator; degassing when the conversion rate reaches above 98%; cooling; and synthesizing the carboxylic styrene-butadiene latex. Compared with the prior art, the preparation method of the small-particle-size carboxylic styrene-butadiene latex has the advantages of realization of the adjustment of the particle size of the latex, and simple operation; and compared with present carboxylic styrene-butadiene latexes, the carboxylic styrene-butadiene latex prepared in the invention has the advantages of narrow monodispersion, good fluidity, excellent mechanical stability and excellent chemical stability.
Description
Technical field
The invention belongs to seeded emulsion polymerization technical field, relate to the preparation of macromolecular material, especially relate to a kind of Small-particle-size carboxylic styrene-butadiene latex and preparation method thereof.
Background technology
Letex polymerization is with water as solvent, by means of mechanical stirring, makes monomer be dispersed into milk sap in water, to be caused and the polyreaction of carrying out by initiator under the effect of emulsifying agent.In recent years along with the development of emulsion polymerization technology, the purposes of synthetic latex is also constantly expanded, especially carboxylic styrene butadiene latex, and its purposes comprises Paper Coating, carpet back coating, fabric coating, footwear material bonding etc.Along with the development of paper industry, Paper Coating speed goes is fast, and preparation coating solids is also more and more higher, therefore has higher requirement to styrene-butadiene latex, requires that latex has good mobility and mechanical stability, excellent cohesive strength.For many years, the research in the raising of synthetic latex performance is all being carried out in countries in the world, in the hope of improving the some shortcomings of currently available products, realizes the multifunction of latex.
In order to solve prior art Problems existing, people have carried out long-term exploration, propose solution miscellaneous.Such as, Chinese patent literature discloses a kind of technology of preparing [application number: 200510082910.X] of novel carboxylic styrene-butadiene latex, with aliphatic conjugated diene hydrocarbon, aromatic ethenyl compound for main monomer, add the vinyl unsaturated carboxylic acid of C3-C5, vinyl esters of unsaturated carboxylic acids, vinyl unsaturated carboxylic acid acid amides and vinyl unsaturated nitrile monomer and carry out modification; Emulsifying agent comprises anionic emulsifier and the alkylaryl polyethenoxy ether class nonionic emulsifying agents such as alkyl atmosphere polyoxyethylene ether sulfate, and the not one in alkylaryl polyoxyethylene ether sulfate or alkyl diphenyl ether disulfonate at least selected by anionic emulsifier; Persulphate is initiator, and alkyl sulfide alcohols is molecular weight regulator, adopts ionogen, sequestrant, pH buffer reagent required in letex polymerization.
Such scheme improves prior art to a certain extent, by utilizing batch charging mode synthetic surface tension force high, and the novel carboxylic styrene-butadiene latex that particle diameter is little.But the latex particle size size of program synthesis can not regulate, and makes particle diameter distribution of latex concentrate, affects the mobility that latex is good, mechanical stability and chemical stability.
Summary of the invention
The object of the invention is for the problems referred to above, provide a kind of operation simple, use easy to operate, the Small-particle-size carboxylic styrene-butadiene latex preparation method of the size of adjustable latex.
Another object of the present invention is to provide a kind of Small-particle-size carboxylic styrene-butadiene latex adopting above-mentioned preparation method to obtain.
For achieving the above object, present invention employs following technical proposal: the first conception of the present invention is to provide a kind of Small-particle-size carboxylic styrene-butadiene latex preparation method, and this preparation method comprises the steps:
Material component of A, seed latex and preparation method thereof:
1. seed latex comprises the material component of following portions by weight:
Soft water: 250-350 part, divinyl: 10-30 part, vinylbenzene: 70-90 part, compound emulsifying agent: 10-15 part, initiator: 0.2-1.2 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of seed latex:
The rear priority that vacuumizes polymeric kettle drops into above-mentioned soft water, compound emulsifying agent, molecular weight regulator, pH buffer reagent, divinyl, vinylbenzene and the ionogen needed for letex polymerization and sequestrant, after being warming up to 40-60 DEG C, add initiator, reaction 10-15 hour, reaction to transformation efficiency reaches after more than 98%, cool to less than 30 DEG C, synthesize seed latex;
Material component of B, carboxylic styrene butadiene latex and preparation method thereof:
1. carboxylic styrene butadiene latex comprises the material component of following portions by weight:
Soft water: 100-120 part, seed latex: 10-15 part, divinyl: 30-80 part, vinylbenzene: 20-70 part, unsaturated carboxylic acid: 1-5 part, function monomer: 2-6 part, compound emulsifying agent: 1-4 part, initiator: 0.3-1.5 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of carboxylic styrene butadiene latex:
Polymeric kettle vacuumizes rear priority and adds ionogen, sequestrant and pH buffer reagent needed for above-mentioned soft water, seed latex, letex polymerization, after being warming up to 75 DEG C, drip divinyl, vinylbenzene, function monomer, unsaturated carboxylic acid, molecular weight regulator, compound emulsifying agent and initiator simultaneously, time for adding controls at 2-3 hour, temperature controls at 75-95 DEG C, insulation reaction 3-5 hour, when transformation efficiency reaches more than 98%, carry out degassed process, regulate between latex pH value to 7-8 with alkali lye, cool to less than 30 DEG C, synthesis carboxylic styrene butadiene latex.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described unsaturated carboxylic acid comprises any one or multiple combination in vinylformic acid, methacrylic acid, methylene-succinic acid.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described function monomer comprises vinyl cyanide and acrylamide.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described compound emulsifying agent is the combination of any one or two kinds in anionic emulsifier and nonionic emulsifying agent.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described anionic emulsifier comprises any one or multiple combination in sodium alkyl sulfate, alkyl sodium sulfonate, sodium alkyl benzene sulfonate and alkyl diphenyl ether disulphonic acid sodium.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, it is any one or multiple combination in 5-40 alkylphenol polyoxyethylene that described nonionic emulsifying agent comprises ethoxymer distribution.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described molecular weight regulator is alkyl sulfhydryl.
In the preparation method of above-mentioned Small-particle-size carboxylic styrene-butadiene latex, described alkyl sulfhydryl is lauryl mercaptan.
Second conception of the present invention is to provide a kind of Small-particle-size carboxylic styrene-butadiene latex, and this Small-particle-size carboxylic styrene-butadiene latex adopts above-mentioned preparation method to obtain, and the size of described Small-particle-size carboxylic styrene-butadiene latex is 80-100nm.
Compared with prior art, this Small-particle-size carboxylic styrene-butadiene latex preparation method, operation is simple, uses easy to operate, the size of adjustable latex; The advantage of the Small-particle-size carboxylic styrene-butadiene latex adopting the present invention to prepare is: size distribution is in very narrow single dispersing, and good fluidity, have excellent mechanical stability and chemical stability, cohesive strength is high.
Accompanying drawing explanation
Fig. 1 is the Electronic Speculum figure of embodiment 1 product.
Fig. 2 is the Electronic Speculum figure of comparative example 1 product.
Embodiment
Embodiment 1:
Material component of A, seed latex and preparation method thereof:
1. seed latex comprises the material component of following portions by weight:
Soft water: 250-350 part, divinyl: 10-30 part, vinylbenzene: 70-90 part, compound emulsifying agent: 10-15 part, initiator: 0.2-1.2 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of seed latex:
The rear priority that vacuumizes polymeric kettle drops into above-mentioned soft water, compound emulsifying agent, molecular weight regulator, pH buffer reagent, divinyl, vinylbenzene and the ionogen needed for letex polymerization and sequestrant, after being warming up to 40-60 DEG C, add initiator, reaction 10-15 hour, reaction to transformation efficiency reaches after more than 98%, cool to less than 30 DEG C, synthesis seed latex;
Material component of B, carboxylic styrene butadiene latex and preparation method thereof:
1. carboxylic styrene butadiene latex comprises the material component of following portions by weight:
Soft water: 100-120 part, seed latex: 10-15 part, divinyl: 30-80 part, vinylbenzene: 20-70 part, unsaturated carboxylic acid: 1-5 part, function monomer: 2-6 part, compound emulsifying agent: 1-4 part, initiator: 0.3-1.5 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of carboxylic styrene butadiene latex:
Polymeric kettle vacuumizes rear priority and adds ionogen, sequestrant and pH buffer reagent needed for above-mentioned soft water, seed latex, letex polymerization, after being warming up to 75 DEG C, drip divinyl, vinylbenzene, function monomer, unsaturated carboxylic acid, molecular weight regulator, compound emulsifying agent and initiator simultaneously, time for adding controls at 2-3 hour, temperature controls at 75-95 DEG C, insulation reaction 3-5 hour, when transformation efficiency reaches more than 98%, carry out degassed process, regulate between latex pH value to 7-8 with alkali lye, cool to less than 30 DEG C, synthesis carboxylic styrene butadiene latex.
In above-described embodiment 1, described molecular weight regulator is alkyl sulfhydryl, and described alkyl sulfhydryl comprises lauryl mercaptan; Compound emulsifying agent is the combination of any one or two kinds in anionic emulsifier and nonionic emulsifying agent, described anionic emulsifier comprises any one or multiple combination in sodium alkyl sulfate, alkyl sodium sulfonate, sodium alkyl benzene sulfonate and alkyl diphenyl ether disulphonic acid sodium, and it is any one or multiple combination in 5-40 alkylphenol polyoxyethylene that described nonionic emulsifying agent comprises ethoxymer distribution; Unsaturated carboxylic acid comprises any one or multiple combination in vinylformic acid, methacrylic acid, methylene-succinic acid; Function monomer comprises vinyl cyanide and acrylamide.
Adopt the Small-particle-size carboxylic styrene-butadiene latex that above-mentioned preparation method obtains, its particle diameter is 80-100nm.
As one of technical scheme optimized the most, in the present embodiment 1, in the preparation of seed latex, soft water is 280kg, and molecular weight regulator is 10kg, compound emulsifying agent is 12kg, and divinyl is 10kg, and vinylbenzene is 90kg, initiator is 0.5kg, and temperature of reaction is 52 DEG C, and the reaction times is 12 hours; In the preparation of carboxylic styrene butadiene latex, soft water is 110kg, seed latex is 13kg, and divinyl is 45kg, and vinylbenzene is 55kg, unsaturated carboxylic acid is 3kg, function monomer is 4kg, and compound emulsifying agent is 3kg, and initiator is 0.8kg, molecular weight regulator is 0.5kg, time for adding is 3.5 hours, and temperature of reaction is 80 DEG C, and insulation reaction is 3 hours.
Embodiment 2:
Material component of seed latex and carboxylic styrene butadiene latex and preparation method thereof all with above-described embodiment 1 roughly the same, do not repeat herein.
In above-described embodiment 2, described molecular weight regulator, compound emulsifying agent, unsaturated carboxylic acid, function monomer all with embodiment 1 roughly the same, do not repeat herein.
Adopt the Small-particle-size carboxylic styrene-butadiene latex that above-mentioned preparation method obtains, its particle diameter is 80-100nm.
As one of technical scheme optimized the most, in the present embodiment 2, in the preparation of seed latex, soft water is 310kg, and compound emulsifying agent is 11kg, and divinyl is 15kg, and vinylbenzene is 85kg, and initiator is 0.4kg, and temperature of reaction is 48 DEG C, and the reaction times is 14 hours; The preparation seed latex of carboxylic styrene butadiene latex chooses 12kg, and time for adding is 3 hours, all the other consumptions all with embodiment 1 roughly the same, do not repeat herein.
Embodiment 3:
Material component of seed latex and carboxylic styrene butadiene latex and preparation method thereof all with above-described embodiment 1 or 2 roughly the same, do not repeat herein.
In above-described embodiment 3, described molecular weight regulator, compound emulsifying agent, unsaturated carboxylic acid, function monomer all with embodiment 1 or 2 roughly the same, do not repeat herein.
Adopt the Small-particle-size carboxylic styrene-butadiene latex that above-mentioned preparation method obtains, its particle diameter is 80-100nm.
As one of technical scheme optimized the most, in the present embodiment 3, in the preparation of seed latex, soft water is 330kg, and compound emulsifying agent is 13kg, and divinyl is 22kg, and vinylbenzene is 78kg, and initiator is 0.7kg, and temperature of reaction is 55 DEG C, and the reaction times is 11 hours; In the preparation of carboxylic styrene butadiene latex, seed latex is chosen for 10kg, and time for adding is 2.5 hours, all the other consumptions all with embodiment 1 or 2 roughly the same, do not repeat herein.
In order to compare the performance of the Small-particle-size carboxylic styrene-butadiene latex obtained by the inventive method, be described further below in conjunction with comparative example 1.
Adopt the preparation method of embodiment 1, do not add seed latex to test, consumption is constant, other conditions are also constant, and synthesized carboxylic styrene butadiene latex performance declines to some extent, and surface tension is on the low side, particle diameter is larger, exceed 80-100nm, chemical stability and mechanical stability are also all poor, cannot meet the requirement of Coated Paper coating.
Carry out Electronic Speculum test to the product carboxylic styrene butadiene latex of embodiment 1 and comparative example 1, the Electronic Speculum of embodiment 1 the results are shown in Figure 1, and the Electronic Speculum of comparative example 1 the results are shown in Figure 2, can obtain from Fig. 1 and Fig. 2, and the particle size dispersion of Fig. 1 is very narrow single dispersing, good fluidity.
Known from embodiment 1-3, the size of carboxylic styrene butadiene latex can by the accurate control regulating the add-on of seed latex to realize final latex particle size, and namely along with the increase of seed latex amount, the particle diameter of its carboxylic styrene butadiene latex reduces.
The testing method accepted standard of Small-particle-size carboxylic styrene-butadiene latex is as follows:
Total solid content: SH/T1154-92
Viscosity: SH/T1152-92
PH value: SH/T1150-92
Surface tension: SH/T1156-92
Mechanical stability: SH/T1151-92
Chemical stability: SH/T1608-95
Particle diameter: AUTOSIZER IIC particle instrument
In order to the raw material dosage that more clearly indicates 3 embodiments and 1 comparative example and the product performance obtained, list in a tabular form below.
The synthesizing formula of table 1 Small-particle-size carboxylic styrene-butadiene latex
The performance index of table 2 Small-particle-size carboxylic styrene-butadiene latex
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (2)
1. a preparation method for Small-particle-size carboxylic styrene-butadiene latex, is characterized in that, this preparation method comprises the steps:
Material component of A, seed latex and preparation method thereof:
1. seed latex comprises the material component of following portions by weight:
Soft water: 250-350 part, divinyl: 10-30 part, vinylbenzene: 70-90 part, compound emulsifying agent: 10-15 part, initiator: 0.2-1.2 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of seed latex:
The rear priority that vacuumizes polymeric kettle drops into above-mentioned soft water, compound emulsifying agent, molecular weight regulator, pH buffer reagent, divinyl, vinylbenzene and the ionogen needed for letex polymerization and sequestrant, after being warming up to 40-60 DEG C, add initiator, reaction 10-15 hour, reaction to transformation efficiency reaches after more than 98%, cool to less than 30 DEG C, synthesize seed latex;
Material component of B, carboxylic styrene butadiene latex and preparation method thereof:
1. carboxylic styrene butadiene latex comprises the material component of following portions by weight:
Soft water: 100-120 part, seed latex: 10-15 part, divinyl: 30-80 part, vinylbenzene: 20-70 part, unsaturated carboxylic acid: 1-5 part, function monomer: 2-6 part, compound emulsifying agent: 1-4 part, initiator: 0.3-1.5 part, molecular weight regulator: 0.1-0.6 part and the ionogen needed for letex polymerization, sequestrant and pH buffer reagent;
2. the preparation method of carboxylic styrene butadiene latex:
Polymeric kettle vacuumizes rear priority and adds ionogen, sequestrant and pH buffer reagent needed for above-mentioned soft water, seed latex, letex polymerization, after being warming up to 75 DEG C, drip divinyl, vinylbenzene, function monomer, unsaturated carboxylic acid, molecular weight regulator, compound emulsifying agent and initiator simultaneously, time for adding controls at 2-3 hour, temperature controls at 75-95 DEG C, insulation reaction 3-5 hour, when transformation efficiency reaches more than 98%, carry out degassed process, regulate between latex pH value to 7-8 with alkali lye, cool to less than 30 DEG C, synthesis carboxylic styrene butadiene latex;
Described unsaturated carboxylic acid comprises any one or multiple combination in vinylformic acid, methacrylic acid, methylene-succinic acid; Described function monomer comprises vinyl cyanide and acrylamide; Described compound emulsifying agent is the combination of any one or two kinds in anionic emulsifier and nonionic emulsifying agent; Described anionic emulsifier comprises any one or multiple combination in sodium alkyl sulfate, alkyl sodium sulfonate, sodium alkyl benzene sulfonate and alkyl diphenyl ether disulphonic acid sodium; It is any one or multiple combination in 5-40 alkylphenol polyoxyethylene that described nonionic emulsifying agent comprises ethoxymer distribution; Described molecular weight regulator is alkyl sulfhydryl; Described alkyl sulfhydryl is lauryl mercaptan.
2. the Small-particle-size carboxylic styrene-butadiene latex that obtains of the preparation method of Small-particle-size carboxylic styrene-butadiene latex according to claim 1; The particle diameter of described Small-particle-size carboxylic styrene-butadiene latex is 80-100nm.
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| KR101394405B1 (en) * | 2011-12-09 | 2014-05-15 | 금호석유화학 주식회사 | Styrene-Butadiene latex for coating paper and its preparing method |
| CN104231173B (en) * | 2014-09-17 | 2018-08-14 | 珠海金鸡化工有限公司 | carboxylic styrene butadiene latex preparation system and preparation method thereof |
| CN104211858B (en) * | 2014-09-17 | 2015-12-30 | 珠海金鸡化工有限公司 | carboxylic styrene butadiene latex and preparation method thereof |
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