CN103242481B - A kind of preparation method of high solids content polypropylene-base paper making intensifier - Google Patents
A kind of preparation method of high solids content polypropylene-base paper making intensifier Download PDFInfo
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- CN103242481B CN103242481B CN201310149797.7A CN201310149797A CN103242481B CN 103242481 B CN103242481 B CN 103242481B CN 201310149797 A CN201310149797 A CN 201310149797A CN 103242481 B CN103242481 B CN 103242481B
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Abstract
The invention belongs to technical field of water-soluble polymer material, be specifically related to a kind of preparation method of high solids content polypropylene-base paper making intensifier.The present invention adopts the starting material such as acrylamide, vinylformic acid, ammonium persulphate, S-WAT to prepare paper making intensifier through aqueous solution polymerization technique, solves lower, the water-soluble poor problem of prior art solid content.Preparation method of the present invention can improve polymericular weight and solid content, effective reduction transportation cost and production cost, products obtained therefrom has enhancing and retention and dispersion effect, have good solubility simultaneously, soak and namely can be dissolved completely in water, utilization ratio improves, and has wide market outlook and significant economic benefit.
Description
Technical field
The invention belongs to technical field of water-soluble polymer material, be specifically related to a kind of preparation method of high solids content polypropylene-base paper making intensifier.
Background technology
Polyacrylamide water-soluble high-molecular material has good water-soluble, excellent tackifying, efficiently flocculence, therefore it is widely used in field of papermaking, can adopt the method preparations such as free yl solution polymerization, reverse emulsion polymerization, precipitation polymerization.
Aqueous solution polymerization technique is simple, and polymerization yield rate is high, and environmental pollution is few, is the prefered method preparing organic polymer.Aqueous solution polymerization has many good qualities, but also there is a lot of shortcoming, is difficult to the polymkeric substance of the high molecular preparing high solids content.Usually require that molecular weight is greater than 50 ~ 1,000,000 as paper strengthening agent, for acrylamide, usually when molecular weight is more than 500,000, when monomer content is more than 15%, the viscosity of system will reach 50PaS reaction and dispel the heat very difficult, easily occur sudden and violent poly-, and polymeric water-soluble be very poor.Though reversed-phase emulsion, anti-phase suspension, precipitation polymerization etc. can effectively address these problems.But organic solvent to be used in a large number, there is the problems such as pollution and production cost, and product be water-soluble poor, uses very difficult.The zwitterion polywater solution of the paper strengthening agent liquid product now commercially sold normally acrylamide, solid content is low, and transportation cost is high.Although solid phase prod transportation cost is lower than liquid cost, production cost is higher, and needs spended time to be dissolved in water when using again, and there is some particle can not dissolve completely and be filtered, and utilization ratio reduces.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, provide a kind of preparation method of polypropylene-base paper making intensifier, described preparation method can improve polymericular weight and solid content, effectively can reduce transportation cost, products obtained therefrom has enhancing and retention and dispersion effect, have good solubility simultaneously, soak and namely can be dissolved completely in water, utilization ratio improves.
The present invention is achieved through the following technical solutions:
The preparation method of high solids content polypropylene-base paper making intensifier of the present invention, comprises the following steps:
(1) batching and weight percent as follows: acrylamide 10 ~ 20%, vinylformic acid 10 ~ 20%, ammonium persulphate and S-WAT totally 1 ~ 2%(ammonium persulphate: sulfurous acid=2:1), water 68 ~ 72%;
(2) acrylamide is mixed with vinylformic acid, squeeze in measuring container stand-by as raw material;
(3) in the overcurrent acid ammonium be mixed in proportion and S-WAT, adding water to dissolving, injecting measuring container as composite initiator stand-by;
(4) add the standby half water yield of institute in a kettle., it is stand-by that all the other half water yields squeeze into measuring container;
(5) drive reactor to stir, and open water in vapour reacting by heating still, when water temperature is raised to 75 ~ 80 DEG C, first add 5% of composite initiator total amount, and then add 30% of raw material total amount;
(6) control temperature of reaction 55 ~ 65 DEG C, under condition of normal pressure, then drip remaining raw material mixed solution and composite initiator, polyreaction 6 ~ 8 hours, period divides three times and adds remaining water simultaneously;
(7) finally adding sodium hydroxide regulates pH value in reactor to be 5 ~ 6, then stirs and get final product.
According to the preparation method of above-mentioned high solids content polypropylene-base paper making intensifier, described measuring container is scale tank.
According to the preparation method of above-mentioned high solids content polypropylene-base paper making intensifier, during described polyreaction, add water spacer at 1 ~ 2 hour at every turn, add 1/4 ~ 1/2 of surplus water at every turn.
positive beneficial effect of the present invention:
(1) the present invention can improve polymericular weight and solid content: because the present invention takes different proportioning raw materials and the mode that adds water, polymkeric substance is made effectively to be scattered in solvent, admittedly adding water spacer for three times can reach more than 30% at 1 ~ 2 hour content to finished product, the molecular weight distribution of polymkeric substance, between 50 ~ 5,000,000, effectively can reduce transportation cost.
(2) raw materials relative low price of the present invention, be easy to get, greatly reduce production cost, add lower transportation cost, there is significant economic benefit.
(3) gained paper making intensifier product of the present invention not only has good strengthening for paper, fiber retention and fiber dispersion effect, have good solubility simultaneously, stir a little after soaking and namely can be dissolved completely in water, substantially increase utilization ratio, have broad application prospects.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
embodiment 1
The preparation method of the present embodiment polypropylene-base paper making intensifier, step is as follows:
(1) batching and weight proportion as follows: acrylamide 20 parts, 10 parts, vinylformic acid, ammonium persulphate and S-WAT totally 1 part (ammonium persulphate: sulfurous acid=2:1), 69 parts, water;
(2) acrylamide is mixed with vinylformic acid, squeeze in scale tank stand-by as raw material;
(3) be dissolved in water in the overcurrent acid ammonium be mixed in proportion and S-WAT, inject scale tank as composite initiator stand-by;
(4) add the standby half water yield of institute in a kettle., it is stand-by that all the other half water yields squeeze into scale tank;
(5) drive reactor to stir, and open water in vapour reacting by heating still, when water temperature is raised to 75 ~ 80 DEG C, first add 5% of composite initiator total amount, and then add 30% of raw material total amount;
(6) control temperature of reaction 60 DEG C, under condition of normal pressure, then drip surplus stock mixed solution and composite initiator, polyreaction 8 hours, period adds remaining water every the 2 little time-division three times (surplus waters 1/3,1/3,1/3) simultaneously;
(7) finally adding sodium hydroxide regulates pH value in reactor to be 5 ~ 6, then stirs and get final product.
Product determination of solid content, oven drying method is 31.1%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
embodiment 2
The preparation method of the present embodiment polypropylene-base paper making intensifier, step is as follows:
(1) batching and weight proportion as follows: acrylamide 20 parts, 10 parts, vinylformic acid, ammonium persulphate and S-WAT totally 2 parts (ammonium persulphate: sulfurous acid=2:1), 68 parts, water;
(2) acrylamide is mixed with vinylformic acid, squeeze in scale tank stand-by as raw material;
(3) in the overcurrent acid ammonium be mixed in proportion and S-WAT, add water dissolution, inject scale tank as composite initiator stand-by;
(4) add the half water yield in a kettle., it is stand-by that all the other half water yields squeeze into scale tank;
(5) drive reactor to stir, and open water in vapour reacting by heating still, when water temperature is raised to 75 ~ 80 DEG C, first add 5% of composite initiator total amount, and then add 30% of raw material total amount;
(6) control temperature of reaction 60 DEG C, under condition of normal pressure, then drip surplus stock mixed solution and composite initiator, polyreaction 8 hours, period adds remaining water every the 1.5 little time-division three times (surplus waters 1/2,1/4,1/4) simultaneously;
(7) finally adding sodium hydroxide regulates pH value in reactor to be 5 ~ 6, then stirs and get final product.
Product determination of solid content, oven drying method is 30.5%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
embodiment 3
The preparation method of the present embodiment polypropylene-base paper making intensifier, step is as follows:
(1) batching and weight proportion as follows: acrylamide 18 parts, 10 parts, vinylformic acid, ammonium persulphate and S-WAT totally 2 parts (ammonium persulphate: sulfurous acid=2:1), 70 parts, water;
(2) acrylamide is mixed with vinylformic acid, squeeze in scale tank stand-by as raw material;
(3) in the overcurrent acid ammonium be mixed in proportion and S-WAT, add water dissolution, inject scale tank as composite initiator stand-by;
(4) add the half water yield in a kettle., it is stand-by that all the other half water yields squeeze into scale tank;
(5) drive reactor to stir, and open water in vapour reacting by heating still, when water temperature is raised to 75 ~ 80 DEG C, first add 5% of composite initiator total amount, and then add 30% of raw material total amount;
(6) control temperature of reaction 60 DEG C, under condition of normal pressure, then drip surplus stock mixed solution and composite initiator, polyreaction 7 hours, period adds remaining water every the 1 little time-division three times (surplus waters 1/4,1/4,1/2) simultaneously;
(7) finally adding sodium hydroxide regulates pH value in reactor to be 5 ~ 6, then stirs and get final product.
Product determination of solid content, oven drying method is 30.1%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
embodiment 4
The preparation method of the present embodiment polypropylene-base paper making intensifier is except weight proportion, identical with embodiment 1: acrylamide 15 parts, 15 parts, vinylformic acid, ammonium persulphate and S-WAT totally 1 part (ammonium persulphate: sulfurous acid=2:1), 69 parts, water.
Determination of solid content, oven drying method is 30.1%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
embodiment 5
The preparation method of the present embodiment polypropylene-base paper making intensifier is except weight proportion, identical with embodiment 2: acrylamide 12 parts, 15 parts, vinylformic acid, ammonium persulphate and S-WAT totally 1 part (ammonium persulphate: sulfurous acid=2:1), 72 parts, water.
Determination of solid content, oven drying method is 30.5%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
embodiment 6
The preparation method of the present embodiment polypropylene-base paper making intensifier is except weight proportion, identical with embodiment 3: acrylamide 15 parts, 14 parts, vinylformic acid, ammonium persulphate and S-WAT totally 1 part (ammonium persulphate: sulfurous acid=2:1), 70 parts, water; React 8 hours at 60 DEG C by technique.
Determination of solid content, oven drying method is 30.2%.
Solvability, sample thief 10g, add water 200 g, and soak 15min, stir 5 min with magnetic stirring apparatus at 100r/min, sample dissolves completely.
The present invention is not limited to above-mentioned embodiment, and those skilled in the art also can make multiple change accordingly, but to be anyly equal to the present invention or similar change all should be encompassed in the scope of the claims in the present invention.
Claims (2)
1. a preparation method for high solids content polypropylene-base paper making intensifier, is characterized in that, comprises the following steps:
(1) get the raw materials ready: material and weight percent as follows, acrylamide 10 ~ 20%, vinylformic acid 10 ~ 20%, ammonium persulphate and S-WAT totally 1 ~ 2%, wherein ammonium persulphate: S-WAT=2:1, water 68 ~ 72%;
(2) acrylamide is mixed with vinylformic acid, squeeze in measuring container stand-by as raw material;
(3) ammonium persulphate be mixed in proportion and S-WAT being added water to dissolving, injecting measuring container as composite initiator stand-by;
(4) add the standby half water yield of institute in a kettle., it is stand-by that all the other half water yields squeeze into measuring container;
(5) drive reactor to stir, and open water in vapour reacting by heating still, when water temperature is raised to 75 ~ 80 DEG C, first add 5% of composite initiator total amount, and then add 30% of raw material total amount;
(6) control temperature of reaction 55 ~ 65 DEG C, under condition of normal pressure, then drip surplus stock mixed solution and composite initiator simultaneously, polyreaction 6 ~ 8 hours, period divides three times and adds remaining water, adds water spacer at 1 ~ 2 hour at every turn, adds 1/4 ~ 1/2 of surplus water at every turn;
(7) finally adding sodium hydroxide regulates pH value in reactor to be 5 ~ 6, then stirs and get final product.
2. the preparation method of high solids content polypropylene-base paper making intensifier according to claim 1, is characterized in that: described measuring container is scale tank.
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| JPS54132693A (en) * | 1978-04-05 | 1979-10-15 | Sumitomo Chem Co Ltd | Paper strength-reinforcing resin emulsion |
| WO2002053835A1 (en) * | 2000-12-27 | 2002-07-11 | Japan Pmc Corporation | Papermaking additive, process for producing papermaking additive, and paper containing papermaking additive |
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Non-Patent Citations (2)
| Title |
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| 彭采宇.丙烯酸-丙烯酰胺共聚物/蒙脱土复合材料的研究.《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑(月刊)》.2005,(第5期),第B020-71页. * |
| 阴离子聚丙烯酸胺的合成研究及在造纸中的应用;李云华等;《黑龙江造纸》;20050320(第1期);第29-31页 * |
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