CN1554829A - Latex special for dry method dustless paper and its preparing method - Google Patents
Latex special for dry method dustless paper and its preparing method Download PDFInfo
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- CN1554829A CN1554829A CNA2003101145419A CN200310114541A CN1554829A CN 1554829 A CN1554829 A CN 1554829A CN A2003101145419 A CNA2003101145419 A CN A2003101145419A CN 200310114541 A CN200310114541 A CN 200310114541A CN 1554829 A CN1554829 A CN 1554829A
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Abstract
The present invention relates to latex specially for dry process dustless paper and its preparation process, and belongs to the field of special chemical. butyl acrylate, methyl acrylate, ethoxyl acrylate, styrene, acrylic acid and butyl methacrylate as monomers, are added with deionized water, emulsifier, NaHCO3 and initiator to produce branch chain connection to form copolymer. The present invention can meet the requirement of producing dustless paper and is favorable to spraying. The present invention has high fiber combining strength of paper, high dry and wet strength, simple production operation and stable product quality.
Description
Technical field
The invention belongs to the papermaking specialty chemicals, special-purpose latex during particularly a kind of dry method dust-free paper is produced.The invention still further relates to the preparation method of this latex.
Background technology
Dry method dust-free paper special-purpose latex is a kind of water-soluble emulsion polyphosphazene polymer mould assembly adhesive, and in the duse process paper web, it plays a part bonding fluff pulp fibers, the price of its quality affects product and quality.Latex is a kind of polymer, form by a plurality of chemical chains that are called as monomer, the chemical characteristic of monomer can have influence on intensity, hardness, viscosity, absorptivity, anti-solvent ability and the anti-flammability etc. of latex, common latex polymerization type has now: A ethene, acetate ethylene copolymer (being commonly called as diene latex), the B Styrene-Butadiene, three kinds of C acrylic acid esters co-polymers.Comprehensive relatively three analog copolymers, diene latex is because there are many inconvenience in ethene normal temperature down for gas in transportation, use, the production process; Raw material will carry out pre-emulsification earlier in the production, has increased production stage, and the pre-emulsified degree of monomer is strict simultaneously, the poor operability of production.Styrene-Butadiene, in process of production, can rapid aging when curing temperature and time are limited, but the general yellowing look all in latex surface is not suitable for the production of dust-free paper.The 3rd class acrylic acid esters co-polymer, though smell is low, cost of material is compared higher, this latex easily adheres on the machinery equipment simultaneously, is difficult to clean, and is unfavorable for spraying applying glue.
It as application number 01805296.7 application for a patent for invention, a kind of preparation method who is used for the latex of art paper, comprise that is passed through to add the step of the chain conversion agent of 0.1-10 part weight with emulsion polymerisation, described chain conversion agent comprises: i) simple function group mercaptan compound and ii) contain multi-functional group thiol's compound based at least two thiol functionalities of 100 parts of weight styrenes-divinylic monomer composition.Latex by the inventive method preparation can easily be controlled molecule and gel content, has so just improved polymerization stability and mechanical stability.This invention promptly belongs to styrene-butadiene class latex.
Summary of the invention
The object of the present invention is to provide a kind of styrene and acrylate dry-like method dust-free paper special-purpose latex.The present invention also provides the preparation method of this kind latex for this reason.
The present invention is achieved in that
Dry method dust-free paper special-purpose latex is characterized in that it is that component by the following weight proportioning is made: butyl acrylate 15-20, methyl acrylate 3-5, hydroxy-ethyl acrylate 3-5, styrene 10-12, acrylic acid 2-4, butyl methacrylate 1-2, NaHCO
30.1-0.2 and deionized water 50-60.
Prepare the method for dry method dust-free paper special-purpose latex, comprise the following steps:
Get butyl acrylate, methyl acrylate, hydroxy-ethyl acrylate, styrene, acrylic acid and butyl methacrylate and mix the back compositing monomer, standby; Get initator and be dissolved in the deionized water, it is standby to form initiator solution; Add deionized water and emulsifying agent and logical N in the polymeric kettle
2, be warming up to 75 ℃ after mixing; Add NaHCO
3Add the above-mentioned monomer of part; After emulsion forms, add initiator solution; In polymeric kettle, drip residual monomer; Keep slaking reaction, the decompression degassing then.
After the present invention adopts such scheme, utilize initator, key is closed in insatiable hunger in the reactant open, the monomer side chain is connected, make its copolymerization, form that high molecular, viscosity are big, the copolymer of backbone, both satisfied the production requirement of dust-free paper, be beneficial to the sprinkling applying glue again.The present invention has following technique effect:
1, under action of evocating, be reflected in the micella and take place, latex is more tended towards stability, be difficult for breakdown of emulsion.
2, the sticking footpath of latex is little, page softness after the film forming.
3, monomer dropping has been brought into play the effect of monomer repository, utilization rate height, steady quality, wet strength height.
4, before monomer adds, in polymeric kettle, form stable emulsification system earlier, regulate pH value, so both be beneficial to the polymerization of monomer, have controllability again.The dyanainic friction factor of paper fiber and static friction factor reduce after the applying glue, and the ionic conductivity of fiber and moisture absorption electric conductivity increase, and produce electric discharge phenomena, sheet resistance is descended, thereby prevent accumulation of static electricity, solved dust-free paper produce in the big disadvantage of static, the company's of being beneficial to production that continues.
5, because the micella number is big, so chain termination speed significantly reduces, and causes the glue polymerization speed fast, and molecular weight is big, and viscosity is big, and the page fiber combining is strong, does the wet strength height.
6, increased butyl methacrylate, taked the mode from interlinkage, the side chain number is increased, bonding force is stronger, constant product quality.
7, the present invention adopts the method for many monomer polymerizations, and the morphon major part is a liquid phase, the quantifying proved recipe just, production operation is easy to be understandable, constant product quality.
The specific embodiment
Below in conjunction with embodiment the present invention is elaborated.
Dry method dust-free paper special-purpose latex of the present invention is a kind of styrene and acrylic acid esters co-polymer, belongs to moisture macromolecule emulsus liquid type adhesive, and manufacture craft is as follows:
One, prescription (by 100 parts of quality):
Butyl acrylate 19, methyl acrylate 3, hydroxy-ethyl acrylate 4, styrene 12, acrylic acid 2, butyl methacrylate 1, NaHCO
3, deionized water 55, initator 0.4, emulsifying agent 3, stabilizing agent 0.6.
Above-mentioned initator adopts ammonium persulfate, and emulsifying agent adopts MS-1 and OP-10.
Two, method:
Get butyl acrylate, methyl acrylate, hydroxy-ethyl acrylate, styrene, acrylic acid and butyl methacrylate by recipe ratio, fully mix the back compositing monomer, the monomer head tank of the polymeric kettle of packing into is standby;
Get a part of deionized water in the formula ratio, add initator, the dissolving back forms initiator solution, and the polymeric kettle special high level of packing into groove is standby; This part deionized water generally accounts for about 10% of formula ratio;
Getting remaining deionized water adds in the polymeric kettle;
In polymeric kettle, add emulsifying agent by formula ratio, and stirring (slowly) makes its dissolving;
Logical N in the polymeric kettle
2And be warming up to 75 ℃, logical generally speaking N
2About 0.5 hour;
In polymeric kettle, add NaHCO then
3Dissolving, and suitably accelerate mixing speed;
In the monomer head tank, put into partial monosomy (observe still liquid foaming situation, control adding speed is not to be as the criterion towards still); This partial monosomy weight generally accounts for about 10% of formula ratio;
After emulsion forms (about 5 minutes), the fill a prescription initiator solution of 90% weight of disposable adding begins slowly to drip residual monomer (rate of addition visual response situation and decide) then in still;
After monomer dropping is intact, add remaining initiator solution;
Keep still internal reaction (75 ℃) slaking 2 hours (the monomers flow back amount is looked in the centre, if quantity of reflux is big, can add the initiator solution of formula ratio about 10% again in slaking after 1 hour);
1 hour (can be cooled to 60 ℃) of the decompression degassing;
In emulsion, add the stabilizing agent of formula ratio etc. again, and add ammoniacal liquor adjusting pH value to 5-6;
Naturally be cooled to about 40 ℃ discharging;
Get final product through the pack of 200-300 mesh filter screen.
Three, this product technical indicator:
1, solid content (%) 45 ± 1
2, viscosity [mPa.S (25 ℃)] 245-255
3, density [g/cm3 (25 ℃)] 1.008 ± 40.005
4, pH value 5-6
Four, quality contrast:
Be the technique effect of checking product of the present invention, produce HL-101 latex with general Taiwan and carried out test comparison that the result is:
| Index name | Standard | ??HL-101 | Special-purpose latex |
| Whiteness (%) | ????≥80 | ????79.8 | ????81.2 |
| Tensile strength (kN/M) | ????0.2 | ????0.203 | ????0.215 |
| Wet strength (%) | ????40 | ????40.2 | ????40.8 |
Conclusion: every technical indicator of product of the present invention all reaches standard, and apparently higher than the HL-101 product.
Claims (10)
1, dry method dust-free paper special-purpose latex is characterized in that it is that component by the following weight proportioning is made: butyl acrylate 15-20, methyl acrylate 3-5, hydroxy-ethyl acrylate 3-5, styrene 10-12, acrylic acid 2-4, butyl methacrylate 1-2, NaHCO
30.1-0.2 and deionized water 50-60.
2, dry method dust-free paper special-purpose latex according to claim 1 is characterized in that the weight ratio of above-mentioned component is: butyl acrylate 19, methyl acrylate 3, hydroxy-ethyl acrylate 4, styrene 12, acrylic acid 2, butyl methacrylate 1 and deionized water 55.
3, dry method dust-free paper special-purpose latex according to claim 1 and 2 is characterized in that above-mentioned component also comprises: ammonium persulfate, emulsifying agent, stabilizing agent.
4, prepare the method for dry method dust-free paper special-purpose latex, comprise the following steps:
(1) get butyl acrylate, methyl acrylate, hydroxy-ethyl acrylate, styrene, acrylic acid and butyl methacrylate and mix the back compositing monomer, standby; Get initator and be dissolved in the deionized water, it is standby to form initiator solution;
(2) add deionized water and emulsifying agent and logical N in the polymeric kettle
2, be warming up to 75 ℃ after mixing;
(3) add NaHCO
3
(4) add the above-mentioned monomer of part;
(5) after emulsion forms, add initiator solution;
(6) in polymeric kettle, drip residual monomer;
(7) keep slaking reaction, the decompression degassing then.
5, the method for preparing dry method dust-free paper special-purpose latex according to claim 4 is characterized in that: after the decompression degassing, also add stabilizing agent in the emulsion, and add ammoniacal liquor adjusting pH value to 5-6.
6, according to claim 4 or the 5 described methods that prepare dry method dust-free paper special-purpose latex, it is characterized in that: after dripping residual monomer, add initiator solution once more.
7, according to claim 4 or the 5 described methods that prepare dry method dust-free paper special-purpose latex, it is characterized in that: above-mentioned initator is an ammonium persulfate.
8, the method for preparing dry method dust-free paper special-purpose latex according to claim 6 is characterized in that: above-mentioned initator is an ammonium persulfate.
9, the method for preparing dry method dust-free paper special-purpose latex according to claim 7 is characterized in that: mentioned emulsifier is MS-1.
10, the method for preparing dry method dust-free paper special-purpose latex according to claim 8 is characterized in that: mentioned emulsifier is MS-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310114541 CN1234938C (en) | 2003-12-26 | 2003-12-26 | Latex special for dry method dustless paper and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310114541 CN1234938C (en) | 2003-12-26 | 2003-12-26 | Latex special for dry method dustless paper and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1554829A true CN1554829A (en) | 2004-12-15 |
| CN1234938C CN1234938C (en) | 2006-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310114541 Expired - Fee Related CN1234938C (en) | 2003-12-26 | 2003-12-26 | Latex special for dry method dustless paper and its preparing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418834A (en) * | 2015-12-29 | 2016-03-23 | 廊坊市北辰创业树脂材料有限公司 | Paper-plastic aqueous adhesive and preparation method thereof |
| CN105504137A (en) * | 2016-01-11 | 2016-04-20 | 英德市波特化工实业有限公司 | Heat and cold resisting water-soluble air-drying acrylic resin and preparing method thereof |
| CN111411529A (en) * | 2020-01-14 | 2020-07-14 | 华南理工大学 | Thermal bonding method dust-free expanded paper and preparation method and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132387B (en) * | 2013-01-18 | 2015-05-20 | 广东佳景科技有限公司 | Leatherette paper dip-dying solution and preparation method of the same |
-
2003
- 2003-12-26 CN CN 200310114541 patent/CN1234938C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418834A (en) * | 2015-12-29 | 2016-03-23 | 廊坊市北辰创业树脂材料有限公司 | Paper-plastic aqueous adhesive and preparation method thereof |
| CN105418834B (en) * | 2015-12-29 | 2021-01-29 | 廊坊市北辰创业树脂材料股份有限公司 | Paper-plastic water-based adhesive and preparation method thereof |
| CN105504137A (en) * | 2016-01-11 | 2016-04-20 | 英德市波特化工实业有限公司 | Heat and cold resisting water-soluble air-drying acrylic resin and preparing method thereof |
| CN111411529A (en) * | 2020-01-14 | 2020-07-14 | 华南理工大学 | Thermal bonding method dust-free expanded paper and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1234938C (en) | 2006-01-04 |
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