CN103254446A - One-step production method for degradable biological latex - Google Patents
One-step production method for degradable biological latex Download PDFInfo
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- CN103254446A CN103254446A CN2013101520117A CN201310152011A CN103254446A CN 103254446 A CN103254446 A CN 103254446A CN 2013101520117 A CN2013101520117 A CN 2013101520117A CN 201310152011 A CN201310152011 A CN 201310152011A CN 103254446 A CN103254446 A CN 103254446A
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Abstract
The invention discloses a one-step production method for a degradable biological latex. The one-step production method comprises the following steps of: firstly placing dry corn starch in a mixing device, sequentially spraying hydrochloric acid, sodium trimetaphosphate solution, acrylic solution and hydrogen peroxide into the mixing device, uniformly mixing to form a corn starch mixture, then sieving the corn starch mixture by utilizing a sieve body of 48-65 meshes, placing the sieved corn starch mixture in a squeezing device to carry out squeezing curing treatment, and sequentially smashing, drying and cooling the cured corn starch mixture to prepare a degradable biological latex finished product. According to the process, the main raw material of the corn starch is a renewable biological resource, easily obtained, biodegradable and pollution-free. By adopting the production technology of a squeezing method, the crystal structure of the starch can be damaged, and therefore, a molecular chain is fully extended and exposed, the starch is pre-gelatinized, the product can be dissolved in cold water, the emission of three wastes can not be generated, and the one-step production method is beneficial to environment conservation.
Description
Technical field
The present invention relates to a kind of production technique of degradable biological latex.
Background technology
White Board is the important paper kind of a big class of paper industry, and along with expanding economy, as the high-grade variety in the paper, its demand is increasing.The petroleum base styrene-butadiene latex that uses as paint adhesive in the coating process or the demand of propyl benzene latex are huge, be huge consumption for non-renewable petroleum resources, there is bigger pollution in its production use simultaneously, the product price height, seriously fetter the development of paper industry, pressed for development of alternatives.
At present more about the substitute of disclosed petroleum base latex, utilize starch base as an alternative product be exactly one of them, but majority can't adapt to present high speed and big fabric width paper machine in many substitutes, and along with the progress of paper industry, high solids coatings is widely applied, and traditional treated starch can not satisfy the demand of paper industry fully.Press for the high-grade latex substitute that exploitation can adapt to present papermaking development.
Summary of the invention
Technical problem to be solved by this invention provides a kind of product and easily dissolves, and produces environment friendly and pollution-free degradable biological latex one-step process for producing.
For solving the problems of the technologies described above, technical scheme of the present invention is: earlier the corn dry starch is placed in the mixing device, spray into the hydrochloric acid of relative starch butt weight 1.4%～1.6%, the solution of the Trisodium trimetaphosphate of starch butt weight 0.3～0.5% and acrylic acid solution of relative starch butt weight 2～4% relatively in the mixing device successively, and mix with the corn dry starch, spray into the hydrogen peroxide of relative starch butt weight 0.03～0.06% again, and mix formation W-Gum mixture; Utilize 48～65 mesh sieve bodies that above-mentioned W-Gum mixture is sieved then; The W-Gum mixture that screening is obtained is put into squeezing device and is carried out squeezing, maturing and handle; The W-Gum mixture that slaking is good pulverizes successively, dry, cooling namely makes degradable biological latex finished product.
As optimized technical scheme, degradable biological latex one-step process for producing, earlier the corn dry starch is placed in the mixing device, spray into the hydrochloric acid of relative starch butt weight 1.5%, the solution of the Trisodium trimetaphosphate of starch butt weight 0.4% and acrylic acid solution of relative starch butt weight 3% relatively in the mixing device successively, and mix with the corn dry starch, spray into the hydrogen peroxide of relative starch butt weight 0.05% again, and mix formation W-Gum mixture; Utilize 60 mesh sieve bodies that above-mentioned W-Gum mixture is sieved then; The W-Gum mixture that screening is obtained is put into squeezing device and is carried out squeezing, maturing and handle; The W-Gum mixture that slaking is good pulverizes successively, dry, cooling namely makes degradable biological latex finished product.
As optimized technical scheme, described mixing device comprises double worm mixer.
As optimized technical scheme, described squeezing device comprises twin-screw extruder.
As to improvement of the technical scheme, the working parameter of described twin-screw extruder is:
Rate of feeding: 40～50rpm; Screw speed: 90～110rpm; Soft district barrel zone temperature: 110～130 ℃.
As optimized technical scheme, the moisture weight content was 30～35% before W-Gum mixture squeezing, maturing was handled, and slaking reaction district temperature is 70～90 ℃.
As optimized technical scheme, the moisture weight content was 33% before W-Gum mixture squeezing, maturing was handled, and slaking reaction district temperature is 80 ℃.
Owing to adopted technique scheme, the invention has the beneficial effects as follows: the main raw material in this technology is W-Gum, and W-Gum is renewable biological source, draws materials conveniently, and is biodegradable, pollution-free.Adopt the extrusion process production technology; because it is to react under High Temperature High Pressure, can destroy the crystalline texture of starch, make molecular chain fully stretch exposure; be conducive to fully carrying out of chemical reaction; reaction efficiency is high, owing to destroyed the crystalline texture of starch, can make the starch pregelatinated; product can fully dissolve in cold water; the heat energy of comparing when having reduced boiling with traditional starch based sizing agent consumes, and can not produce " three wastes " discharging in this technology, helps to protect environment.
Embodiment
Degradable biological latex one-step process for producing, as a kind of preferred embodiment, this technology is to be made by following method: earlier the corn dry starch is placed in the mixing device, spray into the hydrochloric acid of relative starch butt weight 1.5%, the solution of the Trisodium trimetaphosphate of starch butt weight 0.4% and acrylic acid solution of relative starch butt weight 3% relatively in the mixing device successively, and mix with the corn dry starch, spray into the hydrogen peroxide of relative starch butt weight 0.05% again, and mix formation W-Gum mixture; Utilize 60 mesh sieve bodies that above-mentioned W-Gum mixture is sieved then; The W-Gum mixture that screening is obtained is put into squeezing device and is carried out squeezing, maturing and handle; The W-Gum mixture that slaking is good pulverizes successively, dry, cooling namely makes degradable biological latex finished product.
Mixing device comprises double worm mixer described in the present embodiment; Described squeezing device comprises twin-screw extruder, and the working parameter of described twin-screw extruder is: rate of feeding: 40～50rpm; Screw speed: 90～110rpm; Soft district barrel zone temperature: 110～130 ℃, in order corn dry starch squeezing, maturing to be handled reach best effects, working parameter that can twin-screw extruder is set to: rate of feeding: 45rpm, screw speed 100rpm, 120 ℃ of soft district barrel zone temperatures.
Describe each component below in detail to the influence of product:
The hydrochloric acid addition is to the influence of product: along with the reduction of hydrochloric acid addition, viscosity improves gradually, and the stability beginning is higher, after reduce gradually, it is bigger that viscosity is influenced by the hydrochloric acid addition, more low as the hydrochloric acid addition of viscosity-depression agent, viscosity is more high; And the ageing resistance of starch reduces after the viscosity increased, and stability reduces, therefore, when the hydrochloric acid addition be starch butt weight 1.4%～1.6% the time, viscosity reaches about 250cp, stability is 100%, meets product requirement.
Moisture was to the influence of product before W-Gum mixture squeezing, maturing was handled: along with the reduction of moisture content, viscosity raises rapidly, and stability raises earlier gradually, after occur again reducing largely, this be because, can make the pharmaceutical chemicals of adding be penetrated into uniformly more rapidly that starch granules is inner to react with starch molecule when moisture content is higher, especially the infiltration of hydrochloric acid can increase the degree of hydrolyzed starch molecular chain, and sufficient moisture can make particle slaking fully in extrusion machine, guarantee amount of cure and the homogeneity of particle, be conducive to carrying out fully smoothly of chemical reaction, but when moisture content is higher, also crystallization again of starch molecule by the extrusion machine discharge, take place aging, the reduction that the stability of starch can be in various degree when therefore moisture content was higher, and moisture content is crossed when hanging down, slaking can not well take place in starch in the extrusion process, there is the partial crystallization structure, just chemical reaction can not take place well also, therefore stability also can be lower, finds that by a large amount of tests the range of viscosities of starch is 250～300 when the moisture content of squeezing, maturing is 32%～34%, stability is 99%, meets product requirement.
The addition of Trisodium trimetaphosphate is to the influence of quality product: along with the raising of the addition of Trisodium trimetaphosphate, the viscosity of starch raises gradually, when the addition of Trisodium trimetaphosphate during greater than starch butt weight 0.8% viscosity occur reducing, this is because Trisodium trimetaphosphate is a kind of linking agent, make starch molecule form network structure, when addition is low, it has played bridging action between starch molecule, viscosity and the stability of starch have been increased, and when addition was higher, crosslinked action strengthened, and made and formed network structure closely between the starch molecule, limited the dispersion of starch molecule in water, show as starch viscosity reduction and stability reduction, therefore, when the Trisodium trimetaphosphate addition reach starch butt weight 0.4% the time, the viscosity of biological latex is 245cp, and stability reaches 99%.
The vinylformic acid addition is to the influence of quality product: along with acrylic acid addition improves gradually, viscosity increases sharply, and stability improves the higher level of back maintenance rapidly, this be because, vinylformic acid and starch generation graft reaction, acrylic acid addition is more high, the quantity that hydrophilic radical inserts is more many, the viscosity of biological latex is more high, and stability is to be determined by the aging of biological latex, and it is more many that hydrophilic radical inserts, and resistance to deterioration is more strong, more be not easy to take place again by intramolecularly or intermolecularly form hydrogen bond and recrystallization, therefore stability is just more good, therefore, when acrylic acid addition be starch butt weight 3% the time, the viscosity of biological latex is 253cp, and stability reaches 99%.
Squeezing, maturing is handled the influence to quality product: along with the rising of squeezing, maturing temperature, viscosity reduces rapidly, tend towards stability more than 90 ℃, and stability increases gradually with the raising of squeezing, maturing temperature, reduce gradually later on when being higher than 85 ℃, this be because, the more high destruction to starch granules crystalline texture of temperature is more complete, the pharmaceutical chemicals that adds and the reaction of starch molecule are more complete, show as the reduction of viscosity and the raising of stability, and too high when temperature, except meeting destroys the crystalline texture of starch granules, also can starch molecular chain be interrupted, cause viscosity and the stability of starch to reduce rapidly, therefore when the squeezing, maturing temperature was 80 ℃ of left and right sides, the viscosity of biological latex was 250cp, and stability reaches 99%.
This handicraft product adopts hydrochloric acid to come the hydrolyzed starch chain, adjusts viscosity, improves stability; Adopt crosslinking reaction, make the starch molecule chain bridging form network structure, reach and improve anti-shear stability, the purpose of gaining in strength; Adopt acrylic acid-grafted reaction, insert hydrophilic radical, increase the polarity of this product, strengthened wetting ability, increased the water-retentivity of coating, because polar molecule easier molecular orientation when being subjected to shearing, show stronger pseudo-plasticity, use the pseudo-plasticity of coating behind this product to strengthen, mobile better during high-shear, because graft reaction has taken place strengthens the acid and alkali-resistance degree of this product greatly, can satisfy the needs of paper.
The degradable biological latex that obtains in the present embodiment is carried out the mensuration of viscosity, the mensuration of whiteness, the mensuration of transparency, the mensuration of stability, mensuration, the detection of spot number and the ash content detection of moisture content respectively, can obtain technical indicator as shown in the table:
The concrete mensuration mode of above-mentioned each technical indicator is the known content of those of ordinary skill in the art, here repeats no more.
The main raw material of this product technology is W-Gum, and China's corn resources is abundant, as renewable biological source, draws materials conveniently, and is biodegradable, pollution-free, and my company has great raw material advantage as the W-Gum manufacturer of domestic maximum simultaneously.
This Technology adopts the extrusion process production technology.Extrusion technique is widely used in industry-by-industry at present, because it is to react under High Temperature High Pressure, can destroy the crystalline texture of starch, makes molecular chain fully stretch exposure, is conducive to fully carrying out of chemical reaction, and reaction efficiency is high; Owing to destroyed the crystalline texture of starch, can make the starch pregelatinated, the degradable biological latex products can fully be dissolved in cold water, compares the heat energy consumption when having reduced boiling with traditional starch based sizing agent; Because extrusion production technology is that final product also is solid to the modification of material under lower moisture content, do not produce " three wastes " discharging, belong to the product that clean environment firendly is produced.
This technology is positioned to develop petroleum base latex substitute-degradable biological latex pollution-free, low-cost, Functionality, quality and appealing design.Good rheological property when mainly providing the machine coating to papermaking as the latex that is coated with the tamanori use, good coating water retention property provides good dried wet tenacity, good printing performance to paper.
Claims (7)
1. degradable biological latex one-step process for producing, it is characterized in that: earlier the corn dry starch is placed in the mixing device, spray into the hydrochloric acid of relative starch butt weight 1.4%～1.6%, the solution of the Trisodium trimetaphosphate of starch butt weight 0.3～0.5% and acrylic acid solution of relative starch butt weight 2～4% relatively in the mixing device successively, and mix with the corn dry starch, spray into the hydrogen peroxide of relative starch butt weight 0.03～0.06% again, and mix formation W-Gum mixture; Utilize 48～65 mesh sieve bodies that above-mentioned W-Gum mixture is sieved then; The W-Gum mixture that screening is obtained is put into squeezing device and is carried out squeezing, maturing and handle; The W-Gum mixture that slaking is good pulverizes successively, dry, cooling namely makes degradable biological latex finished product.
2. degradable biological latex one-step process for producing as claimed in claim 1, it is characterized in that: earlier the corn dry starch is placed in the mixing device, spray into the hydrochloric acid of relative starch butt weight 1.5%, the solution of the Trisodium trimetaphosphate of starch butt weight 0.4% and acrylic acid solution of relative starch butt weight 3% relatively in the mixing device successively, and mix with the corn dry starch, spray into the hydrogen peroxide of relative starch butt weight 0.05% again, and mix formation W-Gum mixture; Utilize 60 mesh sieve bodies that above-mentioned W-Gum mixture is sieved then; The W-Gum mixture that screening is obtained is put into squeezing device and is carried out squeezing, maturing and handle; The W-Gum mixture that slaking is good pulverizes successively, dry, cooling namely makes degradable biological latex finished product.
3. degradable biological latex one-step process for producing as claimed in claim 1 or 2, it is characterized in that: described mixing device comprises double worm mixer.
4. degradable biological latex one-step process for producing as claimed in claim 1 or 2, it is characterized in that: described squeezing device comprises twin-screw extruder.
5. degradable biological latex one-step process for producing as claimed in claim 4, it is characterized in that: the working parameter of described twin-screw extruder is:
Rate of feeding: 40～50rpm; Screw speed: 90～110rpm; Soft district barrel zone temperature: 110～130 ℃.
6. degradable biological latex one-step process for producing as claimed in claim 1 is characterized in that: the moisture weight content was 30～35% before W-Gum mixture squeezing, maturing was handled, and slaking reaction district temperature is 70～90 ℃.
7. degradable biological latex one-step process for producing as claimed in claim 6 is characterized in that: the moisture weight content was 33% before W-Gum mixture squeezing, maturing was handled, and slaking reaction district temperature is 80 ℃.
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| CN201310152011.7A CN103254446B (en) | 2013-04-27 | 2013-04-27 | One-step production method for degradable biological latex |
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| CN201310152011.7A CN103254446B (en) | 2013-04-27 | 2013-04-27 | One-step production method for degradable biological latex |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067897A (en) * | 1992-04-11 | 1993-01-13 | 福州大学 | The manufacture method of fo instant gel starch |
| CN1346832A (en) * | 2001-11-06 | 2002-05-01 | 华南理工大学 | Non-crystal granular starch and its preparing process |
| EP2251358A1 (en) * | 2008-03-07 | 2010-11-17 | San-Ei Gen F.F.I., INC. | Method for modifying starch and method for producing starch blended preparation |
| CN102115551A (en) * | 2010-12-31 | 2011-07-06 | 永港伟方（北京）科技股份有限公司 | Starch-based nano biological latex and preparation method thereof |
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- 2013-04-27 CN CN201310152011.7A patent/CN103254446B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067897A (en) * | 1992-04-11 | 1993-01-13 | 福州大学 | The manufacture method of fo instant gel starch |
| CN1346832A (en) * | 2001-11-06 | 2002-05-01 | 华南理工大学 | Non-crystal granular starch and its preparing process |
| EP2251358A1 (en) * | 2008-03-07 | 2010-11-17 | San-Ei Gen F.F.I., INC. | Method for modifying starch and method for producing starch blended preparation |
| CN102115551A (en) * | 2010-12-31 | 2011-07-06 | 永港伟方（北京）科技股份有限公司 | Starch-based nano biological latex and preparation method thereof |
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