CN102924636B - Suspension polymerization dispersing agent and application thereof - Google Patents
Suspension polymerization dispersing agent and application thereof Download PDFInfo
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- CN102924636B CN102924636B CN201210452658.7A CN201210452658A CN102924636B CN 102924636 B CN102924636 B CN 102924636B CN 201210452658 A CN201210452658 A CN 201210452658A CN 102924636 B CN102924636 B CN 102924636B
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Abstract
The invention discloses a suspension polymerization dispersing agent and an application of the polymerization dispersing agent. The polymerization dispersing agent consists of main dispersing agent ammonium polymethacrylate and auxiliary dispersing agent polyvinyl alcohol, can be used in the suspension polymerization reaction with the participation of optional one or more selected from monomers consisting of acrylate, methacrylate, styrene, vinyl acetate, chloroethylene and the like. The suspension polymerization dispersing agent provided by the invention not only is environment-friendly but also can prepare the polymer with particle size within the range of 50microns to 1000microns by controlling the addition amount, in addition, the dispersing agent is convenient to use, low in raw material cost, easy-to-get in material, low in cost, is suitable for industrial production, and has extremely high application value.
Description
Technical field
The present invention relates to a kind of suspension polymerization dispersant and application thereof, belong to technical field of macromolecule polymerization.
Background technology
Suspension polymerization is that monomer is suspended in the polymerization process in water with small droplets shape.In monomer, be dissolved with initiator, a small droplets is equivalent to a small scale bulk polymerized unit.Change polymer solid particles into from monomer droplet, middle through polymkeric substance-monomer viscous particle stage, also need to add dispersion agent for preventing that particle is sticky, form protective membrane at particle surface.Dispersant dosage is relevant with selecting of polymerization single polymerization monomer and dispersion agent, and consumption is not monomer mass 0.05～30% not etc.The sodium salt of mentioning polyacrylic acid and polymethyl acrylic acid in " suspension polymerization " that Pan Zuren writes can be used as synthetic macromolecule dispersing agent, the sodium salt that Chinese patent CN102030849A also mentions polyacrylic acid and polymethyl acrylic acid can be used as the application of suspension polymerization dispersant, but after polyacrylic acid and the discharge of sodium polymethacrylate salt, can produce the residual of sodium Metal 99.5 ion, edatope is produced to adverse influence.
Summary of the invention
The problems referred to above that exist for prior art, the object of this invention is to provide a kind of environmentally friendly suspension polymerization dispersant and application thereof.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of suspension polymerization dispersant, is made up of main dispersant ammonium polymethacrylate and dispersion aids polyvinyl alcohol.
As a kind of preferred version, dispersion aids wherein and the mass ratio of main dispersant are (0.001～0.01): 1.
As further preferred version, described dispersion aids is that alcoholysis degree is 70～90% polyvinyl alcohol.
Suspension polymerization dispersant of the present invention can be used in the suspension polymerization of any one or a few participation in the monomers such as acrylate, methacrylic ester, vinylbenzene, vinyl acetate, vinylchlorid.
As a kind of preferred version, when described suspension polymerization dispersant is applied to suspension polymerization, need the first hot water dissolving with 60～100 DEG C by dispersion aids polyvinyl alcohol.
As further preferred version, when described suspension polymerization dispersant is applied to suspension polymerization, after needing first the mixed aqueous solution of main dispersant and dispersion aids to be stirred at 40～60 DEG C, then add polymerization single polymerization monomer.
As preferred version further, the consumption of described suspension polymerization dispersant is 0.1～5% of monomer total mass.
Compared with prior art, suspension polymerization dispersant provided by the invention, not only environmentally friendly, and by controlling addition, can make particle diameter is the polymkeric substance of 100～2000 μ m scopes, and easy to use, raw material is cheap and easy to get, cost is low, is applicable to suitability for industrialized production, has extremely strong practical value.
Embodiment
Below in conjunction with embodiment to the present invention do further in detail, intactly explanation.
Embodiment 1
The ammonium polymethacrylate aqueous solution 20g that get solid content and be 10%, rotary viscosity 25 DEG C time is 500mPa.s, the polyvinyl alcohol that is separately 80% by 0.003g alcoholysis degree is with the hot water dissolving of 80 DEG C of 30g; The above-mentioned main dispersant aqueous solution and the dispersion aids aqueous solution are added in the 5000mL there-necked flask that fills 3000mL deionized water, be warming up to 50 DEG C, stir and make to mix (approximately 20 minutes), obtain suspension polymerization dispersant of the present invention; The suspension polymerization dispersant making is applied to (300g methyl methacrylate, 700g vinylbenzene and appropriate initiator and conditioning agent) in polymerization system, carry out polyreaction according to suspension polymerization process; Polyreaction finishes, and washs, is dried, sieves; Through 30 mesh sieves, (particle diameter 780 μ percent of pass m) is 94% to the copolymer product of gained methyl methacrylate (30%) and vinylbenzene (70%), and through 60 mesh sieves, (particle diameter 250 μ percent of pass m) is 10%.
Embodiment 2
The ammonium polymethacrylate aqueous solution 120g that get solid content and be 5%, the rotary viscosity of 25 DEG C is 230mPa.s, the polyvinyl alcohol that is separately 85% by 0.02g alcoholysis degree is with the hot water dissolving of 85 DEG C of 20g; The above-mentioned main dispersant aqueous solution and the dispersion aids aqueous solution are added in the 5000mL there-necked flask that fills 3000mL deionized water, be warming up to 50 DEG C, stir and make to mix (approximately 20 minutes), obtain suspension polymerization dispersant of the present invention; The suspension polymerization dispersant making is applied to (300g methyl methacrylate, 700g n-BMA and appropriate initiator and conditioning agent) in polymerization system, carry out polyreaction according to suspension polymerization process; Polyreaction finishes, and washs, is dried, sieves; Through 60 mesh sieves, (particle diameter 250 μ percent of pass m) is 96% to the copolymer product of gained methyl methacrylate (30%) and n-BMA (70%), and through 120 mesh sieves, (particle diameter 120 μ percent of pass m) is 20%.
Embodiment 3
The ammonium polymethacrylate aqueous solution 500g that get solid content and be 2%, the rotary viscosity of 25 DEG C is 60mPa.s; The polyvinyl alcohol that is separately 85% by 0.04g alcoholysis degree is used the hot water dissolving of 70 DEG C of 50g; The above-mentioned main dispersant aqueous solution and the dispersion aids aqueous solution are added in the 5000mL there-necked flask that fills 3000mL deionized water, be warming up to 50 DEG C, stir and make to mix (approximately 20 minutes), obtain suspension polymerization dispersant of the present invention; The suspension polymerization dispersant making is applied to (1000g methyl methacrylate and appropriate initiator and conditioning agent) in polymerization system, carry out polyreaction according to suspension polymerization process; Polyreaction finishes, and washs, is dried, sieves; Through 120 mesh sieves, (particle diameter 120 μ percent of pass m) is 96% to gained polymethylmethacrylate product.
Visible in sum: suspension polymerization dispersant provided by the invention, not only environmentally friendly, and by controlling addition, can make particle diameter is the polymkeric substance of 50～1000 μ m scopes, and easy to use, and raw material is cheap and easy to get, cost is low, is applicable to suitability for industrialized production, has extremely strong practical value.
Finally be necessary described herein: above embodiment is only for being described in more detail technical scheme of the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (5)
1. a suspension polymerization dispersant, it is characterized in that: formed by main dispersant ammonium polymethacrylate and dispersion aids polyvinyl alcohol, dispersion aids wherein and the mass ratio of main dispersant are (0.001～0.01): 1, and described dispersion aids is that alcoholysis degree is 70～90% polyvinyl alcohol.
2. the application of suspension polymerization dispersant according to claim 1, is characterized in that: in the suspension polymerization of described suspension polymerization dispersant for any one or a few participation of acrylate, methacrylic ester, vinylbenzene, vinyl acetate, vinyl chloride monomer.
3. application according to claim 2, is characterized in that: when described suspension polymerization dispersant is applied to suspension polymerization, need the first hot water dissolving with 60～100 DEG C by dispersion aids polyvinyl alcohol.
4. application according to claim 3, is characterized in that: when described suspension polymerization dispersant is applied to suspension polymerization, after needing first the mixed aqueous solution of main dispersant and dispersion aids to be stirred at 40～60 DEG C, then add polymerization single polymerization monomer.
5. application according to claim 4, is characterized in that: the consumption of described suspension polymerization dispersant is 0.1～5% of monomer total mass.
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| CN201210452658.7A CN102924636B (en) | 2012-11-13 | 2012-11-13 | Suspension polymerization dispersing agent and application thereof |
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| CN201210452658.7A CN102924636B (en) | 2012-11-13 | 2012-11-13 | Suspension polymerization dispersing agent and application thereof |
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| CN102924636B true CN102924636B (en) | 2014-07-09 |
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| CN104313796B (en) * | 2014-09-09 | 2016-05-11 | 天津工业大学 | The manufacture method of tunica fibrosa for a kind of water-oil separating |
| CN106749824B (en) * | 2016-12-01 | 2019-03-05 | 丹东明珠特种树脂有限公司 | Crosslinked polystyrene sphere preparation dispersing agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101535569A (en) * | 2006-09-14 | 2009-09-16 | 凯米罗总公司 | Composition and method for paper processing |
| CN102659149A (en) * | 2012-02-28 | 2012-09-12 | 山东大学 | Preparation method for monodisperse high-purity alpha-Al2O3 powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101535569A (en) * | 2006-09-14 | 2009-09-16 | 凯米罗总公司 | Composition and method for paper processing |
| CN102659149A (en) * | 2012-02-28 | 2012-09-12 | 山东大学 | Preparation method for monodisperse high-purity alpha-Al2O3 powder |
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