CN103409046B - A kind of aqueous PET bottom-coating and its preparation method and application - Google Patents
A kind of aqueous PET bottom-coating and its preparation method and application Download PDFInfo
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- CN103409046B CN103409046B CN201310365498.7A CN201310365498A CN103409046B CN 103409046 B CN103409046 B CN 103409046B CN 201310365498 A CN201310365498 A CN 201310365498A CN 103409046 B CN103409046 B CN 103409046B
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Abstract
The present invention relates to a kind of aqueous PET bottom-coating for UV light-curable ink priming coat and its preparation method and application.In the coating of every 100 weight portions, including each component of following parts by weight: aqueous polyester resin, 40～75 parts by weight；Cosolvent, 3～15 parts by weight；Deionized water, 5～57 parts by weight；Defoamer, 0.1～0.5 parts by weight.Product volatile organic matter (VOC) content of the present invention is low, and environmental protection manufactures and uses process safety；The aqueous polyester resin used is good with the adhesive force of PET film, and when PET film surface tension value is more than 40 dyne, formulation for coating material is even without curing agent, catalytic component, and the time that baking paint requires is shorter, can obtain higher production efficiency；And product drying rate of the present invention is fast, solidifying without UV after drying, production technology is easy, and production efficiency is high.
Description
Technical field
The invention belongs to water paint field, be specifically related to a kind of aqueous PET bottom-coating and its preparation method and application.
Background technology
UV curable print color saturation is high, printing glossiness is high, particularly uses day in high-grade product packaging
Benefit is extensively.But printing on this non-absorbability base material of PET, UV light-curable ink adhesive force is low, is susceptible to deinking and asks
Topic.
It is that the most the most frequently used two kind increase UV light-curable ink adhesive force in PET that sided corona treatment and primary coat process
Method.Sided corona treatment has poor stability and invests huge shortcoming, it is adaptable to continuous production processes.Primary coat Treatment Stability
Good, the PET film surface tension processed is not by time effects, and low cost, it is not necessary to special installation and technique, the scope of application
Extensively.
Traditional PET bottom-coating is solvent based product, employs a large amount of volatile organic solvent, is easily generated a large amount of volatilization
Property organic matter (VOC), pollute environment, infringement technologist healthy；Organic solvent is volatile simultaneously, in high temperature drying tunnel
Easily burning causes production accident；Also needing to be pre-mixed before machine in conventional double-component system, operating procedure is loaded down with trivial details, and necessary one
Secondary property is finished.
CN201210408829.6 disclose a kind of environment-friendly water-based high adhesion force PET precoated shet coating composition and preparation,
Purposes.This coating is a kind of water paint, but it to reach preferable adhesive force and must carry out UV after drying film forming more admittedly
Change, which increase processing step, make troubles to operation.
Summary of the invention
The invention aims to solve the problem that UV light-curable ink adhesive force on a pet film is bad, it is provided that one
Plant and use safety, the aqueous PET bottom-coating of simple process.
It is a further object of the present invention to provide the preparation method of above-mentioned aqueous PET bottom-coating.
It is a further object of the present invention to provide the application of above-mentioned aqueous PET bottom-coating.
The above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of aqueous PET bottom-coating, in the coating of every 100 parts, including the following component calculated by weight:
Aqueous polyester resin 40～75 parts；
Cosolvent 3～15 parts；
Deionized water 5～57 parts；
Defoamer 0.1 ~ 0.5 part；
Described aqueous polyester resin is preferably aqueous saturated polyester resin.
Described cosolvent is at least one in alkylol, alcohol ether, ketone or ether acetates.
Described defoamer is mineral oil defoaming agent, polyethers defoamer, organosiloxane class defoamer or polyether-modified
At least one in organosiloxane class defoamer.
Preferably, number-average molecular weight Mn of described aqueous saturated polyester resin is 8000～20000, glass transition temperature
Tg is 10～80 DEG C.Molecular weight Mn is the highest, and resistance to water is the best, but resin dispersion viscosity is the biggest；Aqueous saturated polyester resin glass
Glass transition temperature Tg is the highest, and dried coating film speed is the fastest, solvent resistance is the strongest.Preferably, described aqueous saturated polyester resin
Number-average molecular weight Mn be 10000～15000.
Preferably, also including the curing agent of 2～10 parts by weight in described aqueous PET bottom-coating, curing agent can enter
One step shortens the hardening time of coating.Preferably, at least one during described curing agent is amino resins or isocyanates.
Described cosolvent is at least one in alkylol, alcohol ether, ketone or ether acetates；
Preferably, described cosolvent be methyl alcohol, ethanol, isopropanol, EGME, ethylene glycol ethyl ether, butyl glycol ether,
At least one in propylene glycol monomethyl ether, propylene-glycol ethyl ether, diethylene glycol ether, butyl.
Described defoamer is mineral oil defoaming agent, polyethers defoamer, organosiloxane class defoamer or polyether-modified
At least one in organosiloxane class defoamer；
Preferably, described aqueous PET bottom-coating also includes at least one in following auxiliary agent, described auxiliary agent and weight
Number is: catalyst 0.1～2 parts, wetting agent 0.1～1 part, antitack agent 0.1～1 part.
Preferably, in the formula of described aqueous PET bottom-coating, catalyst uses with curing agent simultaneously.
Preferably, described catalyst is strongly acidic catalyst, enclosed type acid catalyst, metallic catalyst or amines catalyst
In at least one；
Preferably, at least one during described wetting agent is anionic wetting agents or non-ionic wetting agent；
Preferably, at least one during described antitack agent is polysiloxanes, mineral oil or wax emulsion.
The preparation method of described aqueous PET bottom-coating, comprises the following steps:
S1. the component with aqueous polyester resin poor compatibility is dissolved in cosolvent, adds deionized water, control dispersion speed
Degree is to stir under 300～500 r/min, obtains dispersion 1；
S2. controlling rate of dispersion is 300～800r/min, aqueous polyester resin, other components is added under stirring
Enter in dispersion 1, stir, i.e. obtain described aqueous PET bottom-coating.
In step S2., when described aqueous polyester resin is hard resin, incite somebody to action solid with the hot water of 75～95 DEG C before using
Body resin is dissolved as content 30～the resin solution of 35%, then carries out the mixing of step S2.
In order to accelerate aqueous polyester resin dissolving in the hot water, hot water can add solvent and/or pH adjusting agent in the past,
Described solvent be ethanol, isopropanol, EGME, ethylene glycol ethyl ether, butyl glycol ether one or more；Described pH regulates
Agent is ammoniacal liquor, triethylamine, AMP-95(2-amino-2-methyl-1-propyl alcohol), N methyldiethanol amine, N, N-dimethylethanolamine,
One in triethanolamine, isopropylamine, morpholine, pyridine.
Described aqueous PET bottom-coating can apply to the coating processed as the primary coat of PET material, and it is concrete
Application process, comprises the following steps:
Described aqueous PET bottom-coating steel rider or ceramic roller are applied in PET film, through temperature 105～125 DEG C,
After time 10～15s continuous drying, direct coating UV light-curable ink.
Aqueous PET bottom-coating of the present invention has good applicability to PET film, especially as the PET of required coating
When the surface tension of film is more than 40 dyne, can be without curing agent in the formula of aqueous PET bottom-coating, the time of baking
Can be shorter, production efficiency is higher.
Compared with prior art, the invention have the advantages that and beneficial effect:
1, aqueous PET bottom-coating of the present invention is water paint, and volatile organic matter (VOC) content is low, green ring
Protect, manufacture and use process safety；
2, product of the present invention has fast drying rate and high adhesiveness, can reach reason without UV solidification after the drying
The adhesive force thought, industrialized production of being more convenient for, improves production efficiency.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described further.Test method used in following embodiment
If no special instructions, it is conventional method；The raw material that used, reagent etc., if no special instructions, being can be commercial etc. from routine
Raw material that commercial sources obtains and reagent.
In embodiment, aqueous saturated polyester resin can be selected for the EW-312 of SK Chemical Co., Ltd., and number-average molecular weight Mn is
10000～15000, glass transition temperature Tg is 60 DEG C；Can be selected for the EW-370 of SK Chemical Co., Ltd., number-average molecular weight Mn
Being 10000～15000, glass transition temperature Tg is 43 DEG C；Can be selected for the WP-850 of Guangzhou Chan Xie macromolecule Co., Ltd, Gu
Content 30%, number-average molecular weight Mn is 10000～15000, and glass transition temperature Tg is 50 DEG C.
EW-312 and EW-370 of SK Chemical Co., Ltd. can in the form of a solution or solid form provide, when this product is solid
During body resin form, available following method is dissolved:
By 20kg isopropanol, 30kg deionized water adds in the stainless steel cauldron of 200L, starts dispersion machine and adjusts dispersion
Speed is that 800r/min disperses 5min, adds 35kg solid polyester resin, be heated to 90 DEG C in system, keeps 800r/min high
Speed dispersion 3h be completely dissolved to hard resin, add about 15kg deionized water regulation solid content to 35%, be cooled to room temperature, obtain
Polyester resin dispersion.
Following embodiment is selected EW-312 and EW-370 of the solid content 35% after dissolving.
Table one: the component of embodiment and parts by weight
Embodiment 1～3
The aqueous PET bottom-coating of the present embodiment 1～3, comprises the component shown in table one and parts by weight.Its preparation method
Comprise the following steps:
A. putting in reactor by cosolvent, deionized water, controlling rate of dispersion is to stir under 300r/min；
B. controlling rate of dispersion is 500r/min, adds aqueous polyester resin, and stirring 20min makes aqueous polyester resin mix
Uniformly, it is eventually adding defoamer and is uniformly dispersed, i.e. obtain aqueous PET bottom-coating.
The application of the aqueous PET bottom-coating of the present embodiment, specific as follows:
The aqueous PET bottom-coating obtained is applied in PET film with 200 mesh steel riders, through temperature 120～130 DEG C, time
Between 13～15s continuous dryings, be coated UV light-curable ink.After tested, when not precoating aqueous PET bottom-coating, the upper printing of PET
UV light-curable ink easily can pull with 3M adhesive tape；And after being coated with fabric aqueous PET bottom-coating, adhesive tape test 3M adhesive tape is pullled
5 times UV light-curable ink comes off on a small quantity with priming coat.
Embodiment 4
The aqueous PET bottom-coating of the present embodiment 4, comprises the component shown in table one and parts by weight.Its preparation method bag
Include following steps:
A. putting in reactor by wetting agent, cosolvent, deionized water, controlling rate of dispersion is to stir under 300r/min
10min；
B. controlling rate of dispersion is 500r/min, adds aqueous polyester resin, antitack agent, defoamer, and stirring 20min makes water
Property polyester resin mixes, and i.e. obtains aqueous PET bottom-coating.
The application of the aqueous PET bottom-coating of the present embodiment, specific as follows:
The aqueous PET bottom-coating obtained is applied in PET film with 200 mesh steel riders, through temperature 115～125 DEG C, time
Between 13～15s continuous dryings, be coated UV light-curable ink.After tested, when not precoating aqueous PET bottom-coating, the upper printing of PET
UV light-curable ink easily can pull with 3M adhesive tape；And after being coated with fabric aqueous PET bottom-coating, adhesive tape test 3M adhesive tape is pullled
5 times UV light-curable ink does not falls off.
Embodiment 5
The aqueous PET bottom-coating of the present embodiment 5, comprises the component shown in table one and parts by weight.Its preparation method bag
Include following steps:
A. putting in reactor by catalyst, wetting agent, cosolvent, controlling rate of dispersion is to stir under 300r/min
5min, adds curing agent, deionized water, and controlling rate of dispersion is stirring 10min under 500r/min；
B. keeping rate of dispersion is 500r/min, adds aqueous polyester resin, and stirring 30min makes aqueous polyester resin mix
Uniformly, it is eventually adding defoamer, then under 500r/min, disperses 10min, i.e. obtain aqueous PET bottom-coating.
The application of the aqueous PET bottom-coating of the present embodiment, specific as follows:
The aqueous PET bottom-coating obtained is applied in PET film with 220 mesh steel riders, through temperature 105～115 DEG C, time
Between 12～15s continuous dryings, be coated UV light-curable ink.After tested, when not precoating aqueous PET bottom-coating, the upper printing of PET
UV light-curable ink easily can pull with 3M adhesive tape；And after being coated with fabric aqueous PET bottom-coating, adhesive tape test 3M adhesive tape is pullled
5 times UV light-curable ink does not falls off.
Embodiment 6
The aqueous PET bottom-coating of the present embodiment 6, comprises the component shown in table one and parts by weight.Its preparation method bag
Include following steps:
A. putting in reactor by catalyst, wetting agent, cosolvent, controlling rate of dispersion is to stir under 300r/min
5min, adds curing agent, deionized water, and controlling rate of dispersion is stirring 10min under 500r/min；
B. keeping rate of dispersion is 800r/min, adds aqueous polyester resin, antitack agent, and stirring 30min makes waterborne polyester
Resin, antitack agent mix, and are eventually adding defoamer, then disperse 10min under 500r/min, i.e. obtain aqueous PET primary coat
Coating.
The application of the aqueous PET bottom-coating of the present embodiment, specific as follows:
The aqueous PET bottom-coating obtained is applied in PET film with 220 mesh steel riders, through temperature 110～120 DEG C, time
Between 12～15s continuous dryings, be coated UV light-curable ink.After tested, when not precoating aqueous PET bottom-coating, the upper printing of PET
UV light-curable ink easily can pull with 3M adhesive tape；And after being coated with fabric aqueous PET bottom-coating, adhesive tape test 3M adhesive tape is pullled
5 times UV light-curable ink does not falls off.
Embodiment 7
The aqueous PET bottom-coating of the present embodiment 7, comprises the component shown in table one and parts by weight.Its preparation method bag
Include following steps:
A. putting in reactor by catalyst, wetting agent, cosolvent, controlling rate of dispersion is to stir under 300r/min
5min, adds curing agent, deionized water, and controlling rate of dispersion is stirring 20min under 500r/min；
B. keeping rate of dispersion is 500r/min, adds aqueous polyester resin, and stirring 30min makes aqueous polyester resin mix
Uniformly, it is eventually adding defoamer, then under 500r/min, disperses 10min, i.e. obtain aqueous PET bottom-coating.
The application of the aqueous PET bottom-coating of the present embodiment, specific as follows:
The aqueous PET bottom-coating obtained is applied in PET film with 220 mesh steel riders, through temperature 115～125 DEG C, time
Between 10～13s continuous dryings, be coated UV light-curable ink.After tested, when not precoating aqueous PET bottom-coating, the upper printing of PET
UV light-curable ink easily can pull with 3M adhesive tape；And after being coated with fabric aqueous PET bottom-coating, adhesive tape test 3M adhesive tape is pullled
5 times UV light-curable ink does not falls off.
Comparative example 1: prepare PET bottom-coating, by obtain by middle preparation embodiment 5 method of CN201210408829.6
PET bottom-coating is applied in PET film with 220 mesh steel riders, through temperature 115～125 DEG C, time 13～15s continuous drying, Gu
Chemical conversion film, no longer carries out UV solidification, direct coating UV light-curable ink.
After tested, after film-forming, no longer carry out UV and solidify direct coating UV light-curable ink, adhesive tape test 3M glue
Band is pullled 2 UV light-curable inks and is i.e. occurred coming off.It can be seen that the PET bottom-coating of prior art, owing to it is to utilize third
The double bond of olefin(e) acid is just provided that enough adhesive force after UV solidifies, it is therefore necessary to carry out UV solidification after film-forming.And this
PET bottom-coating described in application, is i.e. provided that enough adhesive force, can more convenient use after film-forming.
The above-mentioned adhesive tape test of the present embodiment is measured by the following method:
Being kept flat by sample on a glass, priming coat upwards, takes 3M600 adhesive tape and is affixed on priming coat, presses with thumb,
Uniformly posting, then peel off rapidly with 160～180 ° of methods, surface is without substantially coming off for qualified.
Above-described embodiment is the present invention preferably embodiment, but the present invention being not restricted to the described embodiments, other
Without departing from essence of the present invention and the change of principle, modify, substitute, combine, simplify and be the substitute mode of present invention equivalence, all wrap
Containing within the scope of the present invention.
Claims (3)
1. the method improving UV light-curable ink adhesive force on a pet film, it is characterised in that by aqueous PET bottom-coating
It is applied in PET film, after temperature 105～125 DEG C, time 10～15s continuous drying, direct coating UV light-curable ink；
Described aqueous PET bottom-coating, in the coating of every 100 weight portions, is made up of the following component calculated by weight:
Aqueous polyester resin 40～75 parts；
Cosolvent 3～15 parts；
Deionized water 5～57 parts；
Defoamer 0.1 ~ 0.5 part；
Curing agent 2～10 parts；
Catalyst 0.1～2 parts；
Wetting agent 0.1～1 part；
Antitack agent 0.1～1 part；
Described aqueous polyester resin is aqueous saturated polyester resin；
Described cosolvent is at least one in alkylol, alcohol ether, ketone or ether acetates；
Described defoamer is mineral oil defoaming agent, polyethers defoamer, organosiloxane class defoamer or polyether-modified organic
At least one in type siloxane defoamer；
Number-average molecular weight Mn of described aqueous saturated polyester resin is 8000～20000, and glass transition temperature Tg is 10～80
℃；
Described curing agent is isocyanates.
Method the most according to claim 1, it is characterised in that described cosolvent is methyl alcohol, ethanol, isopropanol, ethylene glycol
In methyl ether, ethylene glycol ethyl ether, butyl glycol ether, propylene glycol monomethyl ether, propylene-glycol ethyl ether, diethylene glycol ether or butyl
At least one.
Method the most according to claim 1, it is characterised in that described catalyst is that strongly acidic catalyst, enclosed type acid are urged
At least one in agent, metallic catalyst or amines catalyst；
Described wetting agent is at least one in anionic wetting agents or non-ionic wetting agent；
Described antitack agent is at least one in polysiloxanes, mineral oil or wax emulsion.
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| CN103409046B true CN103409046B (en) | 2016-09-07 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130636A (en) * | 2014-07-27 | 2014-11-05 | 广西梧州龙鱼漆业有限公司 | Water wall paint for external walls |
| CN105038532B (en) * | 2015-07-08 | 2018-02-23 | 中国乐凯集团有限公司 | A kind of hydrophilic PET bottoms coating fluid and its application on PET |
| CN106609097A (en) * | 2015-10-26 | 2017-05-03 | 天津市新丽华色材有限责任公司 | Metallic paint formula |
| CN106905732A (en) * | 2017-04-17 | 2017-06-30 | 德阳森华新材料科技有限公司 | Environment protection multifunctional optical curing of UV coating |
| CN109988488B (en) * | 2017-12-29 | 2021-06-22 | 上海维凯光电新材料有限公司 | Anti-counterfeiting easily-torn electronic tag coating and preparation method thereof |
| CN108373650A (en) * | 2018-03-28 | 2018-08-07 | 深圳市美丽华科技股份有限公司 | A kind of aqueous PET ink for screen printing and preparation method thereof |
| CN111379191A (en) * | 2018-12-28 | 2020-07-07 | 上海杰易森股份有限公司 | Primer coating for water-based silver cardboard and preparation method thereof |
| CN112341659A (en) * | 2020-11-12 | 2021-02-09 | 常州百佳年代薄膜科技股份有限公司 | Primer, preparation method, raw material formula, coating process and BOPET film |
| CN112795294B (en) * | 2021-01-07 | 2022-02-22 | 湖南松井新材料股份有限公司 | Water-based paint, preparation method thereof, spraying method and product |
| CN113004756A (en) * | 2021-03-24 | 2021-06-22 | 安徽国风塑业股份有限公司 | PET (polyethylene terephthalate) primer for water-based UV (ultraviolet) coating as well as preparation method and application of PET primer |
| CN114736580A (en) * | 2022-04-13 | 2022-07-12 | 滁州金桥德克新材料有限公司无锡分公司 | Water-based release adhesive and preparation method and application thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101550311B (en) * | 2009-05-07 | 2011-07-20 | 杭州传化涂料有限公司 | Aqueous finish paint used for coiled material |
| CN102909973A (en) * | 2012-10-23 | 2013-02-06 | 山东丽鹏股份有限公司 | Production process for skip printing of aluminum plate |
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