CN1218973C - Synthetic method of acrylic acid series copoly-macromolecule damping material - Google Patents
Synthetic method of acrylic acid series copoly-macromolecule damping material Download PDFInfo
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- CN1218973C CN1218973C CN 03125426 CN03125426A CN1218973C CN 1218973 C CN1218973 C CN 1218973C CN 03125426 CN03125426 CN 03125426 CN 03125426 A CN03125426 A CN 03125426A CN 1218973 C CN1218973 C CN 1218973C
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Abstract
The present invention relates to a synthetic method for acrylic acid series copolymerization macromoleculedamping materials. The present invention is characterized in that distilled water is filled in a reaction still with a jacket in a water phase suspension polymerization method, and acrylic acid series monomers, crosslinking agents, initiating agents, organic dispersing agents and inorganic dispersing agents are added to participate in reaction. The method is realized by the procedures: 1. each component is proportioned according to weight; 2. various reaction substances are added in the reaction still according to the formula, the pH value is regulated to 2, the stirring speed is above 400 revolutions per minute, the reaction substances are gradually heated to 70 to 80 DEG C in the reaction still at normal pressure, and reaction time is from 4 to 6 hours; 3. the reaction substances are cooled to room temperature by filling cooling water in the jacket of the reaction still, and reaction materials are discharged; 4. the reaction materials are dried by washing and blowing by natural wind. The present invention has the advantages of simple technological flow, high safety factor of production, avoidance of a large number of organic solvent, environmental protection and low cost, synthesis temperature can be effectively controlled, macromolecule damping materials with larger molecular weight can be synthesized, and the quality of macromolecule damping materials is improved.
Description
Technical field
The present invention relates to the synthetic method of acrylic acid series copolymerized macromolecule damping material, particularly relate to a kind of synthetic method of water phase suspension acrylic acid series copolymerized macromolecule damping material.
Background technology
Acrylic acid series copolymerized macromolecule damping material mainly adopts solution method and emulsion polymerization to synthesize in prior art.
Solution method is that reaction monomers is dissolved in polymerization under action of evocating in toluene, dimethylbenzene and so on the organic solvent.Its advantage is that solvent is a heat-transfer medium, and polymerization temperature is controlled easily, but also exists solvent to play the chain-transfer agent effect, thus can not get the bigger polymer resistance material of molecular weight, and, consume a large amount of organic solvents, easily produce environmental pollution.Emulsion method is the polymerization of carrying out in the milk sap that reaction monomers and water are mixed with under the emulsifying agent effect, its advantage is that water is reaction medium, cost is low, reacting balance safety, polymerization velocity is fast, and the molecule of product is higher, but also exists owing to be added with more emulsifying agent in the polyreaction, polymer substance is impure, has influence on the character of polymer damping material.
Summary of the invention
The objective of the invention is on the basis of improving above synthetic method, to use new synthetic method, use aqueous suspension polymerization, replace solution and emulsion polymerization, the present invention does not use emulsifying agent and a large amount of organic solvent, cost is low, and production technique is simple, can effectively control synthesis temperature, the polymer damping material that synthesizes larger molecular weight has improved the quality of polymer damping material.
To achieve these goals, technical scheme of the present invention is: the synthetic method of acrylic acid series copolymerized macromolecule damping material, it is characterized in that: adopt aqueous suspension polymerization, in the reactor of strap clamp cover, put into distilled water, and then add acrylic acid series hard monomer, acrylic acid series soft monomer, linking agent, initiator, organic dispersing agent, inorganic dispersant participation reaction, realize by following steps:
1. the weight proportion of each constituent is:
Acrylic acid series soft monomer: butyl acrylate 20-100 weight part
Acrylic acid series hard monomer: butyl methacrylate or methymethacrylate 20-80 weight part
Distilled water 200-400 weight part
Following numerical value is the weight percent by the gross weight of acrylic acid series soft monomer and acrylic acid series hard monomer:
Linking agent: bisacrylamide 0.1-1
Initiator: Diisopropyl azodicarboxylate 0.1-1
Inorganic dispersant: aluminium hydroxide 1-10
Organic dispersing agent: arab resin rubber powder 1-10
2. by above-mentioned prescription various reactants are added in the reactor, pH value is adjusted to 2, and stirring velocity progressively is warmed up to 70-80 ℃ then more than 400 rev/mins in normal-pressure reaction kettle, and the reaction times is 4-6 hour;
3. logical cooling water temperature is emitted reaction mass to room temperature in the reacting kettle jacketing;
4. reaction mass, through washing, it is air-dry to blow natural wind.
Acrylate is a very easily polymeric monomer of a class, and temperature of reaction control is extremely important, adopts the method that progressively heats up during reaction, is raised between 70-80 ℃, and entire reaction course has constant temperature zone, and reaction times 4-6 hour, pH value adjusted to 2.Discharging behind the product cool to room temperature that reaction finishes, reaction mass is removed impurity such as organic and inorganic dispersion agent through washing, and it is air-dry to blow natural wind, and obtaining goods is translucent sticky particle shape material.This material can utilize its high viscosity, can partly change heat energy into and dissipates importing the mechanical energy of material or acoustic energy into, thereby reach damping.
The present invention and solution method synthetic macromolecule damping material compare, and its technical process is simple, and production safety coefficient height can be avoided in a large number with an organic solvent, utilizes environmental protection, and production cost is low; Can effectively control synthesis temperature, synthesize the polymer damping material of larger molecular weight, improve the quality of polymer damping material.Its product is translucent sticky particle, and its use temperature can be used as the damping of the machinery equipment of departments such as industry, traffic, military project, building, the special type function material that subtracts hot-tempered sound uses between-30-80 ℃.
Embodiment
Embodiment 1: add 4 liter water in 10 liter glass-lined kettles, add Butyl acrylate 400g, butyl methacrylate 200g, bisacrylamide 3g, aluminium hydroxide 50g, arab resin powder 25g, Diisopropyl azodicarboxylate 2.5g.
Start stirrer, remain on 500 rev/mins, be warmed up to 60 ℃ and kept 1 hour, be warmed up to 70 ℃ and kept 1 hour, be warmed up to 80 ℃ and kept 4 hours, after reaction finishes, discharging behind the product cool to room temperature, reactant is removed impurity through washing, it is air-dry to blow natural wind, and resulting product is soft translucent strong sticky particle shape material.
Embodiment 2: add 4 liter water in 10 liter glass-lined kettles, add butyl acrylate 400g, butyl methacrylate 400g, bisacrylamide 2g, aluminium hydroxide 40g, arab resin powder 20g, Diisopropyl azodicarboxylate 2g.
Start stirrer, remain on 500 rev/mins, be warmed up to 60 ℃ and kept 1 hour, be warmed up to 70 ℃ and kept 1 hour, be warmed up to 80 ℃ and kept 4 hours, after reaction finishes, discharging behind the product cool to room temperature, reactant is removed impurity through washing, it is air-dry to blow natural wind, and resulting product is soft translucent sticky particle shape material.
Embodiment 3: add 4 liter water in 10 liter glass-lined kettles, add butyl acrylate 400g, methyl methacrylate 200g, bisacrylamide 2g, aluminium hydroxide 40g, arab resin powder 20g, Diisopropyl azodicarboxylate 2g.
Start stirrer, remain on 500 rev/mins, be warmed up to 60 ℃ and kept 1 hour, be warmed up to 70 ℃ and kept 1 hour, be warmed up to 80 ℃ and kept 4 hours, after reaction finishes, discharging behind the product cool to room temperature, reactant is removed impurity through washing, it is air-dry to blow natural wind, and resulting product is the translucent weak sticky particle shape material of medium-soft matter.
Embodiment 4: add 4 liter water in 10 liter glass-lined kettles, add butyl acrylate 400g, methymethacrylate 400g, bisacrylamide 2g, aluminium hydroxide 40g, arab resin powder 20g, Diisopropyl azodicarboxylate 2g.
Start stirrer, remain on 500 rev/mins, be warmed up to 60 ℃ and kept 1 hour, be warmed up to 70 ℃ and kept 1 hour, be warmed up to 80 ℃ and kept 4 hours, after reaction finishes, discharging behind the product cool to room temperature, reactant is removed impurity through washing, it is air-dry to blow natural wind, and resulting product is the translucent weak sticky particle shape material of medium-soft matter.
Claims (1)
1. the synthetic method of acrylic acid series copolymerized macromolecule damping material, it is characterized in that: adopt aqueous suspension polymerization, in the reactor of strap clamp cover, put into distilled water, and then add acrylic acid series soft monomer, acrylic acid series hard monomer, linking agent, initiator, organic dispersing agent and inorganic dispersant participation reaction, realize by following steps:
1. the weight proportion of each constituent is:
The acrylic acid series soft monomer: butyl acrylate 20-100 weight part,
The acrylic acid series hard monomer: butyl methacrylate or methymethacrylate 20-80 weight part,
Distilled water 200-400 weight part,
Following numerical value is the weight percent by the gross weight of acrylic acid series soft monomer and acrylic acid series hard monomer:
Linking agent: bisacrylamide 0.1-1,
Initiator: Diisopropyl azodicarboxylate 0.1-1,
Inorganic dispersant: aluminium hydroxide 1-10,
Organic dispersing agent: arab resin rubber powder 1-10,
2. by above-mentioned prescription various reactants are added in the reactor, pH value is adjusted to 2, and stirring velocity progressively is warmed up to 70-80 ℃ then more than 400 rev/mins in normal-pressure reaction kettle, and the reaction times is 4-6 hour;
3. logical cooling water temperature is emitted reaction mass to room temperature in the reacting kettle jacketing;
4. reaction mass, through washing, it is air-dry to blow natural wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125426 CN1218973C (en) | 2003-09-18 | 2003-09-18 | Synthetic method of acrylic acid series copoly-macromolecule damping material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125426 CN1218973C (en) | 2003-09-18 | 2003-09-18 | Synthetic method of acrylic acid series copoly-macromolecule damping material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524887A CN1524887A (en) | 2004-09-01 |
| CN1218973C true CN1218973C (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03125426 Expired - Fee Related CN1218973C (en) | 2003-09-18 | 2003-09-18 | Synthetic method of acrylic acid series copoly-macromolecule damping material |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012043426A1 (en) * | 2010-09-30 | 2012-04-05 | 株式会社カネカ | Composition containing branched polymer for vibration-damping material |
| CN102660099B (en) * | 2012-05-11 | 2014-04-16 | 南昌航空大学 | Method for preparing blended high-damping polyacrylate damping hydrosol |
| CN103306144A (en) * | 2013-05-17 | 2013-09-18 | 合肥聚合辐化技术有限公司 | Thickening agent for printing and dyeing and preparation method of thickening agent |
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Granted publication date: 20050914 Termination date: 20091019 |