CN105219291A - A kind of preparation method of anti-xanthochromia tape - Google Patents
A kind of preparation method of anti-xanthochromia tape Download PDFInfo
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- CN105219291A CN105219291A CN201510735870.8A CN201510735870A CN105219291A CN 105219291 A CN105219291 A CN 105219291A CN 201510735870 A CN201510735870 A CN 201510735870A CN 105219291 A CN105219291 A CN 105219291A
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- xanthochromia
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Abstract
The invention discloses a kind of preparation method of anti-xanthochromia tape, is its glue mixed by component A and B component?: component A is polyacrylate dispersion; B component is the strong reductant aqueous solution.The present invention by removing the possibility that S element significantly reduces glue xanthochromia in polyacrylate dispersion preparation process, prepares the later stage at glue simultaneously and adds strong reductant, finally reach good anti-xanthochromia effect.The properties of the tape be prepared into this emulsion adhesive is good, and in 5 years quality guaranteed perioves, glue xanthochromia does not occur and preparation technology is simple, pollution-free, with low cost, is applicable to large-scale industrial production.
Description
Technical field
The present invention relates to the preparation method of emulsion-type polyacrylate pressure-sensitive adhesive.
Background technology
Along with industrial development, technical progress, pressure sensitive adhesive quality improves constantly, and use range is also more and more extensive.In the past, most pressure sensitive adhesive was solvent pressure-sensitive adhesive, considered from environment protection, the factor such as to economize on resources, in recent years Water-borne modification gradually,
Wherein emulsion-type polyacrylate pressure-sensitive has become one of important directions of this field development.According to statistics, in all kinds of pressure sensitive adhesives that China produces, emulsion-type polyacrylate pressure-sensitive accounts for about 65%, has been widely used in the every profession and trades such as Pressuresensitive Label, gummed tape, coating, building, weaving and medical material.Emulsion-type polyacrylate pressure-sensitive has the performance of following excellence: take water as solvent, not with an organic solvent, toxicological harmless, pollution-free, belong to environmentfriendly products; Acrylic monomer is many to be easy to carry out copolymerization with other hard monomer and function monomer containing ester group, carboxyl, hydroxyl energy group, make the emulsion adhesive with various performance, and preparation cost to be low, is convenient to application; Relative molecular mass is higher, and ageing resistance, pressure-sensitive and adhesiveproperties are excellent.
But As time goes on the Pressuresensitive Tape that most emulsion-type polyacrylate pressure-sensitive adhesive is made can turn to be yellow from initial white after application gradually, finally become faint yellow, have impact on the attractive in appearance of adhesive article in the application, particularly the stationery adhesive tape of xanthochromia in use affects larger, the serious desire to purchase that even can affect human consumer.Chinese invention patent CN102863929A discloses a kind of preparation method of anti-xanthochromia tape, its preparation process has added the effect that strong reductant reaches anti-xanthochromia after prepared by conventional polypropylene acid esters pressure-sensitive adhesive, but the method merely just carries out anti-xanthochromia process after prepared by polyacrylate pressure-sensitive adhesive, the main component of pressure-sensitive adhesive and traditional preparation methods are not changed to some extent, thus the essential high molecular structure of tackiness agent does not also obviously change, therefore after detecting, find that its effect duration falls short of, especially adhesive tape is after long-term hot and humid encased conveying, anti-xanthochromia effect can obviously reduce.
summary of the invention:
The object of the present invention is to provide a kind of preparation method of anti-xanthochromia tape.For achieving the above object, technical scheme of the present invention is as follows:
The invention provides a kind of preparation method of anti-xanthochromia tape, by weight percentage, this tape uses anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive, and tackiness agent is mixed by component A and B component:
The emulsion 99.2-99.8% of component A to be polyacrylic ester be main component
B component is strong reductant aqueous solution 0.2-0.8%
The formula of the component A of anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive of the present invention comprises by the percentages accounting for component A gross weight:
Soft monomer 45-55%
Hard monomer 2-5%
Function monomer 2-8%
Emulsifying agent 1.2-6%
Initiator 0.1-0.3%
Oxygenant and sweetening agent 0.1-0.2%
Reductive agent 0.2-0.5%
PH adjusting agent 0.4-0.8%
Water 40%-50%
Component A forms through letex polymerization by above formula
Described soft monomer is one or more in n-butyl acrylate, Isooctyl acrylate monomer, ethyl propenoate, ethyl acrylate.Described hard monomer is one or more in methyl methacrylate, vinylbenzene, vinyl cyanide, vinyl acetate.Described function monomer be vinylformic acid, methacrylic acid, methylene-succinic acid, toxilic acid, fumaric acid, N hydroxymethyl acrylamide, Hydroxyethyl acrylate, Propylene glycol monoacrylate, glycidyl acrylate one or more.Described emulsifying agent is polyoxyethylene nonylphenol ether.Described initiator is one or both in Potassium Persulphate, ammonium persulphate.Described oxygenant is hydrogen peroxide.Described reductive agent is inferior sodium phosphate.Described pH adjusting agent is ammoniacal liquor.Described sweetening agent is hydrated barta.
Preferably, described initiator and sweetening agent add by mol ratio 1:1 proportioning.
The B component of described anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive is mixed by strong reductant inferior sodium phosphate and water.Comprise by the percentages accounting for B component gross weight:
Inferior sodium phosphate 15-30%
Water 70-85%
The preparation method of anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive provided by the invention comprises following processing step:
(1) by the recipe ratio of component A, the 35-40% of the 30-35% of the 40-45% of water gross weight, emulsifying agent gross weight, initiator gross weight, all soft monomer, hard monomer and function monomer emulsification 15-20min in pre-emulsification device are obtained pre-emulsion.Remaining water, emulsifying agent, initiator, chain-transfer agent are added in polymerization reactor, when stirring is warming up to 77-83 DEG C, add the 15-20% of pre-emulsion weight, after reaction 30-40min, drip residue pre-emulsion, control reaction times 4h, after insulation 1h, cooling, is cooled to 70 DEG C, add oxygenant, after 5min, add reductive agent.Be cooled to 50 DEG C of dischargings.Add sweetening agent and by ammoniacal liquor adjust ph to 7-8, filter and obtain component A.
(2), under room temperature, B component is slowly added in component A, after being uniformly mixed, obtained anti-xanthochromia tape of the present invention.The component (A) used is respectively 99.2-99.8% and 0.2-0.8% with the weight percent of component (B), and the two weight percent adds up to 100%.
The invention has the beneficial effects as follows: (1) emulsion-type polyacrylate pressure-sensitive adhesive comprises component A and a small amount of B component, after B component is slowly dissolved in component A, due to the long-term restraining effect to oxidizing reaction of the strong reductant in component (B), make polyacrylate latex grain in use by the dioxygen oxidation in air, thus can not guarantee that the adhesive coating of adhesive tape can not be oxidized to yellow.(2) emulsifying agent such as sodium laurylsulfonate or Sodium dodecylbenzene sulfonate will do not added in general preparation process containing S element in preparation process, can reduce the risk of the oxidized after yellowing of adhesive tape effectively.(3) add sweetening agent and the S element added in the initiator such as Potassium Persulphate, ammonium persulphate is become precipitation by filtering removal.In sum, the present invention by removing the possibility that S element significantly reduces glue xanthochromia in polyacrylate dispersion preparation process, prepares the later stage at glue simultaneously and adds strong reductant, finally reach good anti-xanthochromia effect.
The properties of the tape be prepared into this emulsion adhesive is good, and in 5 years quality guaranteed perioves, glue xanthochromia does not occur and preparation technology is simple, pollution-free, with low cost, is applicable to large-scale industrial production.
embodiment:
The embodiment below enumerated is specifically described the present invention, but the present invention is not limited in these examples.Percentage ratio (except particularly pointing out) in following examples is all weight percentage.
According to the formula of table one, component A is formed by letex polymerization.According to the formula of table two, B component is mixed in stirred at ambient temperature by water and strong reductant inferior sodium phosphate.According to the formula of table three, B component is slowly added in component A and mixes in stirred at ambient temperature, be i.e. obtained emulsion-type polyacrylate pressure-sensitive adhesive.This tackiness agent now-making-now-using, performance is best.
Be coated on super transparent BOPP film by pressure sensitive adhesive with RK line rod spreader, film thickness is 25mm, and bondline thickness is about 35mm, is warming up to 100-120 DEG C, and after drying, bondline thickness is about 25mm, namely obtains Pressuresensitive Tape after curling.Pressuresensitive Tape is cut into wide 25mm, the batten of long 200mm, for test.
The formula of component A in pressure-sensitive adhesive:
a50%；b0.5%；c3%；d2.5%；e2%；f0.25%；g0.05%；h0.3%；i0.5%；j40.9%。
Note: a=n-butyl acrylate, b=Isooctyl acrylate monomer, c=methyl methacrylate, d=methacrylic acid, e=polyoxyethylene nonylphenol ether, f=ammonium persulphate and hydrated barta, g=hydrogen peroxide, h=inferior sodium phosphate, i=Nitrogen element quality are ammoniacal liquor, the j=water of 15%.
Table one: the formula of B component in pressure-sensitive adhesive
Table two: the formula of emulsion-type acrylate resin
Table three: the component A in embodiment and the properties of pressure-sensitive adhesive and xanthochromia performance
| Confining force (h) | 180 degree of splitting (N/25mm) | Initial bonding strength (cm) | 72h xanthochromia performance | 720h xanthochromia performance | |
| Inventive samples | 150 | 7 | 2.5 | Nondiscoloration | Nondiscoloration |
| Market samples | 80 | 4 | 3 | Become faint yellow | Become yellow |
Note: xanthochromia performance test conditions is: temperature 70 C, humidity 95%R.H., fixed temperature and humidity uninterrupted 72 hours or 720 hours, tape width is 48mm, internal diameter 300mm, length 200m.
Claims (3)
1. a preparation method for anti-xanthochromia tape, is characterized in that, comprises following processing step:
The first step is prepare the component A of anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive: by the recipe ratio of component A, and the 35-40% of the 30-35% of the 40-45% of water gross weight, emulsifying agent gross weight, initiator gross weight, all soft monomer, hard monomer and function monomer emulsification 15-20min in pre-emulsification device are obtained pre-emulsion; Remaining water, emulsifying agent, initiator, chain-transfer agent are added in polymerization reactor, when stirring is warming up to 77-83 DEG C, add the 15-20% of pre-emulsion weight, after reaction 30-40min, drip residue pre-emulsion, control reaction times 4h, after insulation 1h, cooling, is cooled to 70 DEG C, add oxygenant, after 5min, add reductive agent; Be cooled to 50 DEG C of dischargings; Add sweetening agent and by ammoniacal liquor adjust ph to 7-8, filter and obtain component A;
The formula of the component A of described anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive comprises by the percentages accounting for component A gross weight:
Soft monomer 45-55%
Hard monomer 2-5%
Function monomer 2-8%
Emulsifying agent 1.2-6%
Initiator 0.1-0.3%
Oxygenant and sweetening agent 0.1-0.2%
Reductive agent 0.2-0.5%
PH adjusting agent 0.4-0.8%
Water 40%-50%;
Second step is the anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive of preparation: under room temperature, B component slowly added in component A, after being uniformly mixed, and obtained anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive;
By weight percentage, this tackiness agent is mixed by component A and B component described anti-xanthochromia emulsion-type polyacrylate pressure-sensitive adhesive:
The emulsion 99.2-99.8% of component A to be polyacrylic ester be main component
B component is strong reductant aqueous solution 0.2-0.8%;
The B component of described anti-xanthochromia tape is mixed by strong reductant inferior sodium phosphate and water;
Comprise by the percentages accounting for B component gross weight:
Inferior sodium phosphate 15-30%
Water 70-85%;
3rd step: will with RK line rod spreader pressure sensitive adhesive will be coated on super transparent BOPP film, heat up dry, curling after namely obtain tape.
2. the preparation method of anti-xanthochromia tape as claimed in claim 1, is characterized in that, described soft monomer is one or more in n-butyl acrylate, Isooctyl acrylate monomer, ethyl propenoate, ethyl acrylate; Described hard monomer is one or more in methyl methacrylate, vinylbenzene, vinyl cyanide, vinyl acetate; Described function monomer be vinylformic acid, methacrylic acid, methylene-succinic acid, toxilic acid, fumaric acid, N hydroxymethyl acrylamide, Hydroxyethyl acrylate, Propylene glycol monoacrylate, glycidyl acrylate one or more; Described emulsifying agent is polyoxyethylene nonylphenol ether; Described initiator is one or both in Potassium Persulphate, ammonium persulphate; Described oxygenant is hydrogen peroxide; Described reductive agent is inferior sodium phosphate; Described pH adjusting agent is ammoniacal liquor; Described sweetening agent is hydrated barta.
3. the preparation method of anti-xanthochromia tape as claimed in claim 1 or 2, is characterized in that, described initiator and sweetening agent add by mol ratio 1:1 proportioning.
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| CN201510735870.8A CN105219291A (en) | 2015-11-02 | 2015-11-02 | A kind of preparation method of anti-xanthochromia tape |
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| CN201510735870.8A CN105219291A (en) | 2015-11-02 | 2015-11-02 | A kind of preparation method of anti-xanthochromia tape |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864257A (en) * | 2010-05-26 | 2010-10-20 | 北京高盟新材料股份有限公司 | Adhesive for automobile adhesive film and preparation method thereof |
| CN102863929A (en) * | 2012-09-17 | 2013-01-09 | 马千里 | Anti-yellowing emulsion polyacrylic ester pressure-sensitive adhesive and preparation method thereof |
| CN103146326A (en) * | 2013-03-14 | 2013-06-12 | 马千里 | Emulsion type acrylic ester adhesive for anti-yellowing polishing membrane and preparation method thereof |
-
2015
- 2015-11-02 CN CN201510735870.8A patent/CN105219291A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864257A (en) * | 2010-05-26 | 2010-10-20 | 北京高盟新材料股份有限公司 | Adhesive for automobile adhesive film and preparation method thereof |
| CN102863929A (en) * | 2012-09-17 | 2013-01-09 | 马千里 | Anti-yellowing emulsion polyacrylic ester pressure-sensitive adhesive and preparation method thereof |
| CN103146326A (en) * | 2013-03-14 | 2013-06-12 | 马千里 | Emulsion type acrylic ester adhesive for anti-yellowing polishing membrane and preparation method thereof |
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Application publication date: 20160106 |