CN1759928A - A sort of dispersant and application - Google Patents
A sort of dispersant and application Download PDFInfo
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- CN1759928A CN1759928A CN200510031043.7A CN200510031043A CN1759928A CN 1759928 A CN1759928 A CN 1759928A CN 200510031043 A CN200510031043 A CN 200510031043A CN 1759928 A CN1759928 A CN 1759928A
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- mix monomer
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Abstract
A disperser used for preparing the gypsum slurry as the filler of paper is disclosed. Said gypsum slurry features high content of solid, dispersity and stability, and low granularity and viscosity.
Description
Technical field
The present invention relates to a kind of dispersant that is used for gypsum slurry, relate in particular to a kind of dispersant that is used for the gypsum slurry that adding of paper fill out and be coated with.
Technical background
Gypsum can be divided into the plaster of paris and crown filler by its source, and the plaster of paris is at Chinese aboundresources, and storage capacity occupies first place in the world.The crown filler is mainly derived from industrial by-products, in flue gas desulfurization course, absorbs sulfur dioxide with calcium hydroxide, makes dihydrate gypsum through oxidation again; Also by-product gypsum in the production process of phosphoric acid.
The comprehensive utilization of industry by-product gypsum not only helps environmental protection, also makes industrial by-products obtain effective utilization, is a good job of benefiting the nation and the people.
Gypsum is as a kind of Chinese white, its whiteness height, and to the good stability of soda acid, real density is little, and higher relatively refractive index is arranged, and hardness is low.Make the coating that slurry is used for paper with gypsum, coating whiteness height; Ink absorption is good; Acid still alkaline technology all adapts to; When coating layer thickness was identical, the slurry consumption was few; When coating weight is identical, thick coating; Little to the coating apparatus wearing and tearing.
At present, the gypsum slurry of routine techniques preparation, solid content is low, and particle is big, bad dispersibility, slurry stability is bad, and the viscosity height can not satisfy the needs of field of papermaking, as U.S. Pat 6852159 disclosed technology, need improve.Wherein, the effect of dispersant can not be underestimated, and the performance of dispersant will directly influence stability of slurry and viscosity, so the new dispersant that is used for gypsum slurry of developmental research, will be of great practical significance.
Technology contents
The technical issues that need to address of the present invention are to disclose a kind of dispersant and application thereof, to overcome the above-mentioned defective that prior art exists, satisfy the needs of field of papermaking.
Said dispersant is preparation like this:
(1) mixture of 100～150 weight parts waters and 1 weight portion initator being heated to temperature is 60～85 ℃, obtains mixture;
(2) the mix monomer B of 20～100 weight portions and the mix monomer A of 15～100 weight portions are added dropwise in the mixture of step (1) simultaneously, the control rate of addition, with 1 part of initator is benchmark, control mix monomer A rate of addition is 1～2 part/hour, the rate of addition of mix monomer B is 16～17 parts/hour, and mix monomer B and mix monomer A are dripped simultaneously;
(3) be warming up to 80～95 ℃, be incubated 30～60 minutes, obtain dispersant;
Said initator is selected from a kind of or its mixture in ammonium persulfate, sodium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, hydrogen peroxide butyl, di-tert-butyl peroxide, peroxidating two formyls, the azodiisobutyronitrile;
The component of said mix monomer A and parts by weight are:
Methacrylic acid 1-5 part
Acrylic acid 10-50 part
Methyl methacrylate 5-30 part
Butyl methacrylate 2-15 part
The component of said mix monomer B and parts by weight are:
Acrylamide 0.5-10 part
Acrylonitrile 1-15 part
Deionized water 20-80 part
Initator 0.1-1.5 part
Mix monomer A can adopt the method for conventional physical mixed to be prepared;
Mix monomer B is preparation like this: add entry earlier, under constantly stirring, add acrylamide, acrylonitrile, initator respectively, obtain mix monomer B solution.
Dispersant of the present invention is a dispersant efficiently, adds dispersant in the product, can reduce the reunion between the particle, reduce milling time, make bulky grain be worn into granule easily, can be used for preparing high solid content gypsum sizing material, the preparation method of high solid content gypsum sizing material comprises the steps:
Land plaster and water are mixed together, add dispersant during mixing, ground then 1～3 hour, the particle diameter that is ground to land plaster accounts for more than 30% of total number of particles less than the particle of 2 μ m, adds auxiliary dispersants then, stirred then 0.5～3.0 hour, promptly obtain gypsum slurry, wherein, the weight solid content of land plaster is for containing 30～80%, wherein, the weight percentage of each component is as follows:
Land plaster 30-80%
Dispersant 0.1-5%
Auxiliary dispersants 0.1-5%
Water surplus.
Said auxiliary dispersants is preparation like this:
(1) water of 150～200 weight portions and the initator of 1 weight portion are heated to 60～85 ℃;
(2) then the mix monomer C of 165～265 weight portions and the mix monomer D of 50～80 weight portions are added dropwise in the mixture of step (1) simultaneously, the control rate of addition, with 1 part of initator is benchmark, the rate of addition of mix monomer C be 16.5～45.6 weight portions/hour, the rate of addition of mix monomer D be 5.0～13.3 weight portions/hour, and mix monomer C and mix monomer D are dripped simultaneously;
(3) be warming up to 80～95 ℃, be incubated 30～120 minutes, obtain auxiliary dispersants;
The component of said mix monomer C and parts by weight are:
Methacrylic acid 1-5 part
Acrylic acid 25-35 part
Acrylonitrile 3-10 part
Methylpropene sodium sulfonate 20-35 part
SSS 15-20 part
Acrylamide 1-10 part
Deionized water 100-150 part
Initator 0.1-2.5 part
The component of said mix monomer D and weight content are:
Methyl methacrylate 30-50 part
Butyl methacrylate 20-30 part
Said initator is selected from a kind of or its mixture in ammonium persulfate, sodium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, hydrogen peroxide butyl, di-tert-butyl peroxide, peroxidating two formyls, the azodiisobutyronitrile;
Mix monomer D can adopt the method for conventional physical mixed to be prepared;
Mix monomer C is preparation like this: add entry earlier, under constantly stirring, add methacrylic acid, acrylic acid, acrylonitrile, methylpropene sodium sulfonate, SSS, acrylamide, initator respectively, obtain mix monomer C solution.
Adopt the gypsum slurry of dispersant of the present invention preparation, the solid content height, particle is little, good dispersion, the slurry good stability, viscosity is low, and the gypsum slurry that is obtained is mainly used in adding of paper and fills out and be coated with, and can satisfy the needs of field of papermaking.
The specific embodiment
Embodiment 1
Synthesizing of dispersant:
Mix monomer A
Methacrylic acid 35g
Acrylic acid 250g
Methyl methacrylate 150g
Butyl methacrylate 100g
Above-mentioned raw material is mixed, promptly obtain mix monomer A;
Mix monomer B
Acrylamide 70g
Acrylonitrile 60g
Deionized water 800g
Initator ammonium persulfate 8g
Mix monomer B is preparation like this: add 800g water earlier, under constantly stirring, add acrylamide, acrylonitrile, initator respectively, obtain mix monomer B solution.
In the stirred tank of 5 liters of strap clamp covers and reflux condensate device, add 1200g water and 10g initiator ammonium persulfate, agitating heating, when temperature is raised to 80 ℃, slowly drip mix monomer A and mix monomer B simultaneously, mix monomer A rate of addition is 89g/ hour, and the rate of addition of mix monomer B is 156g/ hour, control mix monomer A and mix monomer B drip simultaneously, be warmed up to 90 ℃ after dropwising, and under this temperature, be incubated 1 hour, obtain dispersant.
The preparation of gypsum slip:
Synthesizing of auxiliary dispersants:
Mix monomer C
Methacrylic acid 20g
Acrylic acid 300g
Acrylonitrile 80g
Methylpropene sodium sulfonate 280g
SSS 180g
Acrylamide 60g
Deionized water 1200g
Initator ammonium persulfate 10g
Mix monomer D
Methyl methacrylate 450g
Butyl methacrylate 240g
In the stirred tank of 8 liters of strap clamp covers and reflux condensate device, add 1800g water and 15g initiator ammonium persulfate, agitating heating, when temperature is raised to 80 ℃, slowly drip the aqueous solution and the mix monomer D of mix monomer C simultaneously, mix monomer C rate of addition is 213g/ hour, and the rate of addition of mix monomer D is 69g/ hour, control mix monomer C and mix monomer D drip simultaneously, be warmed up to 90 ℃ after dropwising, and under this temperature, be incubated 1 hour, obtain auxiliary dispersants;
In 100 liters tank diameter, add 30 premium on currency, open stirring, add 70kg200 purpose natural gesso, add the 400g dispersant, with 20 liters the sand mill that is pumped into two series connection, slurry behind the sand milling carries out analytical test with the laser light scattering particle size analyzer, records granularity 82% less than 2 μ m, with pump slurry is sent in another 100 liters of tank diameters, 500g adds auxiliary dispersants then, stirred 1 hour, and promptly obtained the gypsum slip, the slurry weight solid content is 69.5%.
Adopt the method for ISO 2884-2-2003 standard code, recording slurry viscosity with NDJ-1 type rotation viscometer is 180 centipoises.
Is in 300 the centrifuge centrifugal 3 hours with slurry at separating factor, and the bottom precipitum is 1.2% (weight), and can be evenly dispersed in the slurry again after stirring.
Embodiment 2
Synthesizing of dispersant:
Mix monomer A
Methacrylic acid 28g
Acrylic acid 200g
Methyl methacrylate 310g
Butyl methacrylate 80g
Mix monomer B
Acrylamide 65g
Acrylonitrile 82g
Deionized water 500g
Initator hydrogen peroxide 10g
In the stirred tank of 5 liters of strap clamp covers and reflux condensate device, add 1500g water and 15g initator sodium peroxydisulfate, open agitating heating, when temperature is raised to 75 ℃, slowly drip mix monomer A and mix monomer B simultaneously, the rate of addition of mix monomer A is 88g/ hour, the rate of addition of mix monomer B is 94g/ hour, and control mix monomer A and mix monomer B drip simultaneously;
Mix monomer A and mix monomer B drip simultaneously, are warmed up to 90 ℃ after dropwising, and are incubated 45 minutes under this temperature, obtain dispersant.
The preparation of gypsum slip:
Synthesizing of auxiliary dispersants:
Mix monomer C
Methacrylic acid 15g
Acrylic acid 250g
Acrylonitrile 100g
Methylpropene sodium sulfonate 320g
SSS 160g
Acrylamide 75g
Deionized water 1000g
Initator sodium peroxydisulfate 10g
Mix monomer D
Methyl methacrylate 380g
Butyl methacrylate 310g
In the stirred tank of 8 liters of strap clamp covers and reflux condensate device, add 2000g water and 15g initator sodium peroxydisulfate, open agitating heating, when temperature is raised to 85 ℃, slowly drip the mix monomer C aqueous solution and mix monomer D simultaneously, the rate of addition of mix monomer C is 241g/ hour, the rate of addition of mix monomer D is 86g/ hour, and control mix monomer C and mix monomer D drip simultaneously;
Be warmed up to 90 ℃ after dropwising, and under this temperature, be incubated 1 hour, obtain auxiliary dispersants.
In 100 liters tank diameter, add 30 premium on currency, open stirring, add 75kg200 purpose natural gesso, add 800g dispersant 1, with 20 liters the sand mill that is pumped into two series connection, slurry behind the sand milling carries out analytical test with the laser light scattering particle size analyzer, record granularity 78% less than 2 μ m, with pump with slurry send into another 100 liters of tank diameters in, add 750g then and go into auxiliary dispersants, stir and promptly obtained gypsum slip of the present invention, slurry solid content 71% in 1.5 hours.
Adopt the method for ISO 2884-2-2003 standard code, recording slurry viscosity with NDJ-1 type rotation viscometer is 150 centipoises.
Is in 300 the centrifuge centrifugal 3 hours with slurry at separating factor, and the bottom precipitum is 1.5% (weight), and can be evenly dispersed in the slurry again after stirring.
Claims (4)
1. a dispersant is characterized in that, is to prepare like this:
(1) mixture of 100～150 weight parts waters and 1 weight portion initator being heated to temperature is 60～85 ℃;
(2) the mix monomer B of 20～100 weight portions and the mix monomer A of 15～100 weight portions are added dropwise in the mixture of step (1) simultaneously, mix monomer B and mix monomer A drip simultaneously;
(3) be warming up to 80～95 ℃, be incubated 30～60 minutes, obtain dispersant;
Said initator is selected from a kind of or its mixture in ammonium persulfate, sodium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, hydrogen peroxide butyl, di-tert-butyl peroxide, peroxidating two formyls, the azodiisobutyronitrile;
The component of said mix monomer A and parts by weight are:
Methacrylic acid 1-5 part
Acrylic acid 10-50 part
Methyl methacrylate 5-30 part
Butyl methacrylate 2-15 part
The component of said mix monomer B and parts by weight are:
Acrylamide 0.5-10 part
Acrylonitrile 1-15 part
Deionized water 20-80 part
Initator 0.1-1.5 part.
2. dispersant according to claim 1, it is characterized in that, be benchmark with 1 part of initator, and control mix monomer A rate of addition is 1～2 part/hour, the rate of addition of mix monomer B is 16～17 parts/hour, and mix monomer A and mix monomer B are dripped simultaneously.
3. the application of dispersant according to claim 1 is characterized in that, is used to prepare high solid content gypsum sizing material.
4. the application of dispersant according to claim 1 is characterized in that, the high solid content gypsum sizing material good stability of preparation, viscosity are low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100310437A CN1330405C (en) | 2005-10-21 | 2005-10-21 | A sort of dispersant and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100310437A CN1330405C (en) | 2005-10-21 | 2005-10-21 | A sort of dispersant and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1759928A true CN1759928A (en) | 2006-04-19 |
| CN1330405C CN1330405C (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100310437A Expired - Fee Related CN1330405C (en) | 2005-10-21 | 2005-10-21 | A sort of dispersant and application |
Country Status (1)
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| CN (1) | CN1330405C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418617C (en) * | 2006-10-11 | 2008-09-17 | 上海东升新材料有限公司 | Dispersant in use for fibroid light calcium, preparation method and application |
| CN100509683C (en) | 2006-09-30 | 2009-07-08 | 江苏博特新材料有限公司 | Low molecular weight copolymer dispersant and preparing method thereof |
| CN101385958B (en) * | 2008-10-20 | 2011-04-13 | 西北工业大学 | Polyester type amphipathic nature ultra-dispersant and preparation method thereof |
| CN102120791A (en) * | 2010-11-19 | 2011-07-13 | 苏州博纳化学科技有限公司 | Preparation method of dispersant |
| CN101274242B (en) * | 2008-01-08 | 2011-08-10 | 陕西科技大学 | Method for preparing polymer ceramic dispersants |
| CN101654891B (en) * | 2009-06-30 | 2011-12-28 | 山东宝莫生物化工股份有限公司 | New preparation method of high effective polyacrylamide paper fibre dispersant |
| CN103045002A (en) * | 2013-01-17 | 2013-04-17 | 长沙华润涂料有限公司 | Method for preparing environment-friendly and efficient water-borne coating dispersing agent |
| CN103154128A (en) * | 2010-10-11 | 2013-06-12 | 巴斯夫聚合建材有限公司 | Dispersant containing gypsum slurry |
| CN105085820A (en) * | 2014-05-12 | 2015-11-25 | 江南大学 | Synthesis and application of amide type polyether sodium sulfonate macromolecules for reinforcing mould gypsum |
| CN113105583A (en) * | 2021-05-10 | 2021-07-13 | 华东理工大学 | Preparation method of synthetic paper base coat adhesive |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3184728B2 (en) * | 1995-02-20 | 2001-07-09 | 花王株式会社 | Dispersant for gypsum / water slurry |
| FR2766106B1 (en) * | 1997-07-18 | 2001-09-07 | Coatex Sa | USE OF A COPOLYMER WITH SURFACTORY STRUCTURE AS A DISPERSING AND / OR GRINDING AID |
| JP3727304B2 (en) * | 2002-12-16 | 2005-12-14 | 竹本油脂株式会社 | Gypsum slurry composition |
-
2005
- 2005-10-21 CN CNB2005100310437A patent/CN1330405C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100509683C (en) | 2006-09-30 | 2009-07-08 | 江苏博特新材料有限公司 | Low molecular weight copolymer dispersant and preparing method thereof |
| CN100418617C (en) * | 2006-10-11 | 2008-09-17 | 上海东升新材料有限公司 | Dispersant in use for fibroid light calcium, preparation method and application |
| CN101274242B (en) * | 2008-01-08 | 2011-08-10 | 陕西科技大学 | Method for preparing polymer ceramic dispersants |
| CN101385958B (en) * | 2008-10-20 | 2011-04-13 | 西北工业大学 | Polyester type amphipathic nature ultra-dispersant and preparation method thereof |
| CN101654891B (en) * | 2009-06-30 | 2011-12-28 | 山东宝莫生物化工股份有限公司 | New preparation method of high effective polyacrylamide paper fibre dispersant |
| CN103154128A (en) * | 2010-10-11 | 2013-06-12 | 巴斯夫聚合建材有限公司 | Dispersant containing gypsum slurry |
| CN102120791A (en) * | 2010-11-19 | 2011-07-13 | 苏州博纳化学科技有限公司 | Preparation method of dispersant |
| CN102120791B (en) * | 2010-11-19 | 2012-07-18 | 苏州博纳化学科技有限公司 | Preparation method of dispersant |
| CN103045002A (en) * | 2013-01-17 | 2013-04-17 | 长沙华润涂料有限公司 | Method for preparing environment-friendly and efficient water-borne coating dispersing agent |
| CN105085820A (en) * | 2014-05-12 | 2015-11-25 | 江南大学 | Synthesis and application of amide type polyether sodium sulfonate macromolecules for reinforcing mould gypsum |
| CN105085820B (en) * | 2014-05-12 | 2018-10-30 | 江南大学 | The synthesis and application of acid amide type polyethers sodium sulfonate macromolecular for mould gypsum enhancing |
| CN113105583A (en) * | 2021-05-10 | 2021-07-13 | 华东理工大学 | Preparation method of synthetic paper base coat adhesive |
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| Publication number | Publication date |
|---|---|
| CN1330405C (en) | 2007-08-08 |
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Denomination of invention: A sort of dispersant and application Effective date of registration: 20191225 Granted publication date: 20070808 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shanghai branch Pledgor: SHANGHAI DONGSHENG NEW MATERIALS Co.,Ltd. Registration number: Y2019310000035 |
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Date of cancellation: 20210813 Granted publication date: 20070808 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shanghai branch Pledgor: SHANGHAI DONGSHENG NEW MATERIALS Co.,Ltd. Registration number: Y2019310000035 |
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Granted publication date: 20070808 |