CN106554731A - A kind of preparation method of binding agent - Google Patents
A kind of preparation method of binding agent Download PDFInfo
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- CN106554731A CN106554731A CN201510617972.XA CN201510617972A CN106554731A CN 106554731 A CN106554731 A CN 106554731A CN 201510617972 A CN201510617972 A CN 201510617972A CN 106554731 A CN106554731 A CN 106554731A
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- farinaceous size
- mixed liquor
- starch
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- amylase
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Abstract
The invention discloses a kind of preparation method of binding agent.Wherein, the preparation method of invention adhesives includes：Configuration farinaceous size, and the pH value of farinaceous size is adjusted to 9-11, toward farinaceous size, add cross-linking agent to carry out cross-linking reaction, the pH value of the farinaceous size after cross-linking reaction is adjusted to 6-8 and obtains mixed liquor, add plasticiser toward mixed liquor, Jing heating and heat preservation processes prepare binding agent.By the way, the binding agent that the present invention is prepared has excellent pliability, can be widely applied to bottom-surface coated application.
Description
Technical field
The present invention relates to a kind of preparation method of binding agent.
Background technology
Starch started from for 20 beginnings of the century for coating binder, began to use not extensively, with machine
The development of interior coating technique, starch rapidly become main adhesive.Natural or unmodified ative starch
With very high viscosity, property is unstable, easily aging, seldom uses as the adhesive of coating.
The modified shallow lake for meeting coating adhesive requirement can be produced by physics, chemistry or bio-modification
Powder, most widely used coating adhesive is modified starch now.Modified starch is used as formulation for coating material
Important component part, be mainly used in adhesive, it has good bonding characteristic, can make pigment
Granule mutually bonds and sticks on paper；With good water-retaining property, can prevent coating from making
During there is dehydrating phenomena；Rheological characteristic during scraper for coating is improved, has wider range of viscosities,
The viscosity requirement of most of coating can be met；Can have with many synthetic latexes good compatible
Property, and the advantages of the performance of synthetic latex can be improved.Coating waste water can be substantially reduced with modified starch
Into producing cost, and the printing quality of paper can be improved, make to be difficult during printing hair loss, dry linting,
Broken end and scumming, and absorbability, flatness, glossiness and whiteness of paper printing ink etc. can be controlled.
But it is poor to there is film-forming flexibility as coating adhesive in modified starch prepared by existing method
Defect, this is because native starch is generally by linear macromolecule (amylose) and dendritic big point
Sub (amylopectin) is constituted, and in the environment after moisture evaporation, starch film is easily aging to become fragile.
The content of the invention
The invention mainly solves the technical problem of providing a kind of preparation method of binding agent, Neng Gouyou
Effect improves the pliability of binding agent.
To solve above-mentioned technical problem, one aspect of the present invention is：There is provided a kind of viscous
The preparation method of mixture, methods described include：Configuration farinaceous size, and by the farinaceous size
PH value is adjusted to 9-11；Toward the farinaceous size, add cross-linking agent to carry out cross-linking reaction；To hand over
The pH value for joining reacted farinaceous size is adjusted to 6-8 and obtains mixed liquor；Toward the mixed liquor
Addition plasticiser, Jing heating and heat preservation processes prepare described adhesive.
Wherein, the addition of the plasticiser is the 10-40% of the starch oven-dry weight；The plasticizing
Agent is carbamide, glycerol, Polyethylene Glycol, Methanamide, dibutyl phthalate and O-phthalic
At least one in ester of acid two.
Wherein, it is described toward the mixed liquor add plasticiser the step of after, in heating and heat preservation mistake
Also include before journey：Add hydrophobic modifier toward the mixed liquor.
Wherein, 0.5-1.5% of the addition of the hydrophobic modifier for starch oven-dry weight；It is described to dredge
Water modifying agent is three Oleic acid acyloxy titanate esters of isopropyl, 3- glycydoxy trimethoxies
Base silane, 3- methacryloxypropyl trimethoxy silanes and aminopropyltriethoxy diethoxy
At least one in silane.
Wherein, it is described also to include before heating and heat preservation：Amylase is added toward the mixed liquor.
Wherein, the diastatic addition is the amount of the 50-200ppm relative to starch oven-dry weight；
The amylase is at least one in α-amylase and beta amylase.
Wherein, the farinaceous size solid content of configuration is 35%-40%.
Wherein, the heating and heat preservation process includes：80-85 degree is warming up to, 25-35min is incubated,
Then 90-95 degree is warming up to again, is incubated 10-20min.
Wherein, the cross-linking agent is Biformyl, epoxychloropropane, sodium trimetaphosphate and six inclined phosphorus
At least one in sour sodium；It is described carry out cross-linking reaction condition be：Temperature is 30-50 degree, is stirred
Mix reaction 2-3 hours.
Wherein, the pH value by the farinaceous size adjusts to 9-11 the pH adjusting agent for adopting
For at least one in sodium hydroxide and sodium bicarbonate；The farinaceous size by after cross-linking reaction
PH value adjust to 6-8 and obtain pH adjusting agent that mixed liquor adopts in hydrochloric acid and citric acid
It is at least one.
The invention has the beneficial effects as follows：The situation of prior art is different from, the present invention is by starch
Serosity adds plasticiser in crosslinking reaction, and the farinaceous size after cross-linking reaction with cross-linking agent
It is modified.So, improve the intensity of starch by cross-linking reaction, and the addition of plasticiser,
The hydroxyl or other groups of plasticiser forms hydrogen bond with the hydroxyl on starch molecule, instead of starch point
Hydrogen bond between son, improves the activity space of strand, improves the pliability of starch.So that
Obtain the binding agent for preparing of the invention and there is excellent pliability, can be widely applied to coated on bottom side
Cloth application.
Description of the drawings
Fig. 1 is a kind of flow chart of the preparation method of binding agent provided in an embodiment of the present invention.
Specific embodiment
Fig. 1 is referred to, Fig. 1 is a kind of preparation method of binding agent provided in an embodiment of the present invention
Flow chart, as described in Figure, the preparation method of the binding agent of the present embodiment includes：
S11：Configuration farinaceous size, and the pH value of farinaceous size is adjusted to 9-11.
When implementing, by weighing a certain amount of ative starch, and it is added in a certain amount of water
Stir farinaceous size is obtained so as to configure.Wherein, the ative starch in the embodiment of the present invention can be with
It is one or more in tapioca, corn starch, potato starch and wheaten starch
Mixing.
Wherein, as one kind preferably, the solid content for controlling the farinaceous size of configuration is 35%-40%.
Such as 37%, 38%, 39% etc..
After having configured farinaceous size, pH adjusting agent is added toward farinaceous size by the pH of farinaceous size
Adjust to 9-11.Such as by pH regulator to 9,9.5,10,10.5 etc..Wherein, adopted
PH adjusting agent can be conventional alkaline solution, for example, can be sodium hydroxide, carbonic acid
The combination of the one or two kinds of in hydrogen sodium.
S12：Toward farinaceous size, add cross-linking agent to carry out cross-linking reaction.
After the pH regulator of farinaceous size to 9-11, cross-linking agent is added to crosslink farinaceous size
Reaction.
Reaction is crosslinked by adding cross-linking agent, starch molecule chain length can be improved, increase starch
Molecular weight, lifts starch strength.
Wherein, as a kind of preferred implementation, the addition of cross-linking agent is starch oven-dry weight
0.5-1.5%.Such as 0.7%, 0.9%, 1.1%, 1.3% etc..
When implementing, the cross-linking agent that starch crosslinks reaction can be made in theory to realize this
The effect of invention.As a kind of concrete implementation, in the present embodiment cross-linking agent can selected from Biformyl,
One or more combination in epoxychloropropane, sodium trimetaphosphate and sodium hexameta phosphate.
In order that cross-linking reaction is more fully and thorough, the condition for controlling cross-linking reaction is temperature
30-50 degree, stirring reaction 2-3 hour.That is, by being warming up to 30-50 degree, such as
35 degree, 40 degree, 45 degree etc., stir 2-3 hours, such as 2.2 hours, 2.5 hours, it is 2.8 little
When etc., so that starch can be with cross-linking agent fully, cross-linking reaction is more thorough.Wherein,
Preferably, 40 degree are warming up to, are stirred 2 hours.
S13：The pH value of the farinaceous size after cross-linking reaction is adjusted to 6-8 and obtains mixed liquor.
After cross-linking reaction has been carried out, reacted farinaceous size is adjusted into pH by pH adjusting agent
Mixed liquor is obtained to 6-8.For example, can by pH regulator to 6.5,7.5,8 etc..It is preferred that
By pH regulator to 7.
Wherein, it can be conventional acid solution that pH adjusting agent used here is, illustrate and
Say, pH adjusting agent here can be hydrochloric acid, the mixing of the one or two kinds of of citric acid.
S14：Add plasticiser toward mixed liquor, Jing heating and heat preservation processes prepare binding agent.
The effect of plasticiser in the present invention is the pliability for lifting starch.When implementing, this
Bright plasticiser adopts small molecule plasticizers.For example, the plasticiser in the present embodiment can be
Carbamide, glycerol, Polyethylene Glycol, Methanamide, dibutyl phthalate and phthalic acid two
One or more mixing in ester.
Wherein, as a kind of preferred implementation, the addition of plasticiser is starch oven-dry weight
10-40%.Such as 15%, 20%, 25%, 30%, 35% etc..
Jing heating and heat preservations process is so as to obtaining binding agent.Wherein, as a kind of concrete implementation, this
The heating and heat preservation process of embodiment is specially：80-85 degree is warming up to, 25-35min is incubated, then
95 degree are warming up to again, are incubated 10-20min.82 degree, 84 degree or 85 degree are first warmed up to such as,
Insulation 25min or 30min or 35min.Then be further continued for being warmed up to such as 92 degree, 94
Spend or 95 degree, then be incubated 12min, 15min or 18min etc..
The molecule interchain of starch, the hydroxyl of plasticiser or other bases are penetrated into by small molecule plasticizers
Hydroxyl formation hydrogen bond on group and starch molecule, instead of the hydrogen bond between starch molecule, improves point
The activity space of subchain, so as to improve the pliability of starch.
Used as a kind of preferred implementation, the method for the present embodiment adds plasticizing in toward mixed liquor
After agent, before heating and heat preservation is carried out, also include the step for adding hydrophobic modifier toward mixed liquor
Suddenly.
Also there is the defect of resistance to water as coating adhesive in modified starch prepared by existing method.
This is because starch molecule is hydrophilic macromolecule chain in itself, poor water resistance.
In the embodiment of the present invention, it is to improve starch toward mixed liquor to add hydrophobic modifier purpose
Resistance to water.
Wherein, as a kind of preferred implementation, the addition of hydrophobic modifier is starch over dry
The 0.5-1.5% of amount.Such as 0.7%, 0.9%, 1.1%, 1.3% etc..
When implementing, hydrophobic modified dose in the present embodiment can be three Oleic acid acyl of isopropyl
Epoxide titanate esters, 3- glycydoxy trimethoxy silanes, 3- methacryloxies
The mixing of one or more in propyl trimethoxy silicane, aminopropyltriethoxy diethoxy silane.
By the addition of hydrophobic modifier, introduce with hydrophobic property on starch molecule chain backbone
Hydrophobising groups, introduce the alkyl of macromole, and starch molecule can be made to have " amphiphilic structure ", can
The resistance to water of starch is lifted further.
In addition, as another kind of preferred implementation, before heating and heat preservation is carried out, also entering one
Step includes diastatic step is added toward mixed liquor.By diastatic addition, can be further
The strand of starch molecule is cut off, increases the pliability of starch film forming.
Wherein, toward mixed liquor diastatic step is added to be to carry out cross-linking reaction in theory
After afterwards and by the pH regulator of starch size to 6-8, in the advance for carrying out heating and heat preservation process
OK.
In a kind of possible implementation, the method for the present embodiment includes adding toward mixed liquor simultaneously
Plus plasticiser, addition hydrophobic modifier and during amylase, preferably by hydrophobic modifier being eventually adding,
Plasticiser and diastatic addition order are unrestricted.
Wherein, as a kind of preferred implementation, diastatic addition is exhausted relative to starch
The amount of the 50-200ppm of dry measure.Such as 50ppm, 75ppm, 100ppm, 120ppm, 150ppm
Etc..
When implementing, amylase can be selected from any one of α-amylase and beta amylase
Or two kinds of combination.Preferably, amylase is selected from the combination of α-amylase and beta amylase,
Wherein, in diastatic combination, the amount of α-amylase is 1-99%, and the amount of beta amylase is 99-1%.
Respectively the side chain and straight chain of starch molecule are cut off by α-amylase and beta amylase, increased
Plus the pliability of starch film forming.
Above-mentioned is the method for preparing binding agent provided in an embodiment of the present invention, by farinaceous size with
Cross-linking agent adds plasticiser to be changed in crosslinking reaction, and the farinaceous size after cross-linking reaction
Property.So, improve the intensity of starch by cross-linking reaction, and the addition of plasticiser, plasticiser
Hydroxyl or other groups and starch molecule on hydroxyl form hydrogen bond, instead of between starch molecule
Hydrogen bond, improves the activity space of strand, improves the pliability of starch.So that this
The bright binding agent for preparing has excellent pliability, and can be widely applied to bottom-surface coated should
With.
In addition, by further adding hydrophobic modifier, by the addition of hydrophobic modifier, to shallow lake
The hydrophobising groups with hydrophobic property are introduced on powder molecule chain backbone, the alkyl of macromole is introduced,
Can make starch molecule that there is " amphiphilic structure ", can further lift the resistance to water of starch.
Further, starch enzyme modification can be further added, by molecule of the amylase to starch molecule
Chain is cut off, and further increases the pliability of starch film forming.
The preparation method of the binding agent of the present invention, by the composite modified of various modifying agent so that system
Adhesive strength, pliability and the resistance to water for obtaining has great lifting, can be widely applied to
Bottom-surface coated application.
In order to further illustrate technical scheme, lifted below in conjunction with specific embodiment
Example illustrates that involved concrete proportioning, concrete material are selected and specific reaction condition below,
It is as a kind of specific citing, not to limit the scope of the invention.
Embodiment 1：
Weigh 355.8g is added under 244.2g Maninot esculenta crantz. ative starchs (moisture 14%) stirring
In water, stir, obtain the starch solution that concentration is 35%.Using 10% sodium hydroxide solution
PH to 11 is adjusted, is added 1.5% sodium trimetaphosphate to be warming up to 40 degree and is stirred 2 hours, then with 10%
Salt acid for adjusting pH is to 7；
To above-mentioned mixed liquor add 200ppm composite alpha-amylases, in composite alpha-amylase α-amylase and
Beta amylase percentage ratio is respectively 1% and 99%；25% glycerol is added, while adding 1.0%3-
Glycydoxy trimethoxy silane, stirs,
80-85 degree is warming up to, 30min is incubated, 95 degree of insulation 15min is warming up to, is prepared
Novel coating binding agent.
Embodiment 2：
Weigh 355.8g is added under 244.2g Rhizoma Solani tuber osi ative starchs (moisture 14%) stirring
In water, stir, obtain the starch solution that concentration is 35%.Using 10% sodium hydroxide solution
PH to 11 is adjusted, is added 0.5% Biformyl to be warming up to 40 degree and is stirred 2 hours, then use 10% salt
Acid for adjusting pH is to 7；
To above-mentioned mixed liquor add 100ppm composite alpha-amylases, in composite alpha-amylase α-amylase and
Beta amylase percentage ratio is respectively 50% and 50%；10% Methanamide is added, while adding 1.5%
Aminopropyltriethoxy diethoxy silane, stirs, and is warming up to 80-85 degree, is incubated 30min,
95 degree of insulation 15min are warming up to, Novel coating binding agent is prepared.
Embodiment 3：
Weigh 320.9g is added under 279.1g native cornstarchs (moisture 14%) stirring
In water, stir, obtain the starch solution that concentration is 40%.Using 10% sodium hydroxide solution
PH to 11 is adjusted, is added 1.0% sodium hexameta phosphate to be warming up to 40 degree and is stirred 2 hours, then with 10%
Salt acid for adjusting pH is to 7；
To above-mentioned mixed liquor add 50ppm composite alpha-amylases, in composite alpha-amylase α-amylase and
Beta amylase percentage ratio is respectively 99% and 1%；40% neck phthalic acid dibutyl ester is added, together
When add 0.5%3- glycydoxy trimethoxy silanes, stir, be warming up to
80-85 degree, is incubated 30min, is warming up to 95 degree of insulation 15min, prepares Novel coating and glue
Mixture.
Application effect：
Using Novel coating binding agent 1:1 substitutes synthesis styrene-butadiene latex, and coating formula is GCC 100
Part, 6 parts of coating adhesive, 6 parts of styrene-butadiene latex are coated application；
Embodiment application data：
Can be clearly seen from test result, compared with traditional coating adhesive, Novel coating glues
Mixture has clear improvement at intensity, resistance to water and the quick-fried aspect of folding.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited,
Equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made, or
Other related technical fields are used in directly or indirectly, the patent for being included in the present invention in the same manner is protected
In the range of shield.
Claims (10)
1. a kind of preparation method of binding agent, it is characterised in that methods described includes：
Configuration farinaceous size, and the pH value of the farinaceous size is adjusted to 9-11；
Toward the farinaceous size, add cross-linking agent to carry out cross-linking reaction；
The pH value of the farinaceous size after cross-linking reaction is adjusted to 6-8 and obtains mixed liquor；
Add plasticiser toward the mixed liquor, Jing heating and heat preservation processes prepare the bonding
Agent.
2. method according to claim 1, it is characterised in that the addition of the plasticiser
For the 10-40% of the starch oven-dry weight；The plasticiser is carbamide, glycerol, Polyethylene Glycol, first
Amide, dibutyl phthalate and phthalic acid two at least one in ester.
3. method according to claim 1, it is characterised in that described toward the mixed liquor
After the step of addition plasticiser, also included before heating and heat preservation process：Toward the mixed liquor
Addition hydrophobic modifier.
4. method according to claim 3, it is characterised in that the hydrophobic modifier plus
Enter the 0.5-1.5% that amount is starch oven-dry weight；The hydrophobic modifier is three Oleic acid acyloxy of isopropyl
Titanate esters, 3- glycydoxy trimethoxy silanes, 3- methacryloxypropyls
At least one in trimethoxy silane and aminopropyltriethoxy diethoxy silane.
5. method according to claim 1, it is characterised in that described before heating and heat preservation
Also include：Amylase is added toward the mixed liquor.
6. method according to claim 5, it is characterised in that the diastatic addition
It is the amount of the 50-200ppm relative to starch oven-dry weight；The amylase be α-amylase and β-
At least one in amylase.
7. method according to claim 1, it is characterised in that the farinaceous size of configuration
Solid content is 35%-40%.
8. method according to claim 1, it is characterised in that the heating and heat preservation process bag
Include：80-85 degree is warming up to, 25-35min is incubated, is then warming up to 90-95 degree again, be incubated
10-20min。
9. method according to claim 1, it is characterised in that the cross-linking agent be Biformyl,
At least one in epoxychloropropane, sodium trimetaphosphate and sodium hexameta phosphate；It is described to be crosslinked
The condition of reaction is：Temperature be 30-50 degree, stirring reaction 2-3 hour.
10. method according to claim 1, it is characterised in that described by the farinaceous size
PH value adjust to 9-11 the pH adjusting agent for adopting for sodium hydroxide and sodium bicarbonate in
Few one kind；The pH value of the farinaceous size by after cross-linking reaction is adjusted to 6-8 and obtains mixed liquor
The pH adjusting agent for adopting is at least one in hydrochloric acid and citric acid.
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| CN201510617972.XA CN106554731A (en) | 2015-09-24 | 2015-09-24 | A kind of preparation method of binding agent |
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| CN201510617972.XA CN106554731A (en) | 2015-09-24 | 2015-09-24 | A kind of preparation method of binding agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325750A (en) * | 2017-07-24 | 2017-11-07 | 海南金海浆纸业有限公司 | One kind coating biological adhesive and preparation method thereof |
| CN107629563A (en) * | 2017-10-30 | 2018-01-26 | 惠州市华昱美实业有限公司 | A kind of fireproof coating and its preparation technology |
| CN109338798A (en) * | 2018-08-29 | 2019-02-15 | 佛山市森昂生物科技有限公司 | A kind of paper grade (stock) biology latex and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418196A (en) * | 2007-10-24 | 2009-04-29 | 天津大学 | Pressure sensitive viscous composite using rice flour as raw material and use thereof |
| CN103122598A (en) * | 2013-03-07 | 2013-05-29 | 浙江传化华洋化工有限公司 | Preparation method of high-concentration low-viscosity paper coating modified starch |
-
2015
- 2015-09-24 CN CN201510617972.XA patent/CN106554731A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418196A (en) * | 2007-10-24 | 2009-04-29 | 天津大学 | Pressure sensitive viscous composite using rice flour as raw material and use thereof |
| CN103122598A (en) * | 2013-03-07 | 2013-05-29 | 浙江传化华洋化工有限公司 | Preparation method of high-concentration low-viscosity paper coating modified starch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325750A (en) * | 2017-07-24 | 2017-11-07 | 海南金海浆纸业有限公司 | One kind coating biological adhesive and preparation method thereof |
| CN107629563A (en) * | 2017-10-30 | 2018-01-26 | 惠州市华昱美实业有限公司 | A kind of fireproof coating and its preparation technology |
| CN109338798A (en) * | 2018-08-29 | 2019-02-15 | 佛山市森昂生物科技有限公司 | A kind of paper grade (stock) biology latex and preparation method thereof |
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Application publication date: 20170405 |