CN107760123A - Anti-mildew fresh-keeping coating and its preparation method and application - Google Patents
Anti-mildew fresh-keeping coating and its preparation method and application Download PDFInfo
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- CN107760123A CN107760123A CN201711015234.3A CN201711015234A CN107760123A CN 107760123 A CN107760123 A CN 107760123A CN 201711015234 A CN201711015234 A CN 201711015234A CN 107760123 A CN107760123 A CN 107760123A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
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- C08J2431/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
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- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
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Abstract
A kind of anti-mildew fresh-keeping coating and its preparation method and application, by weight percentage composition include following component：Matrix resin 20%~50%, solvent 20%~70%, mould inhibitor 0.65%~25.5%, water-keeping material 0.3%~4% and auxiliary agent 0.2%~2%；Wherein, matrix resin is selected from least one of the polyvinyl alcohol of polyurethane, acrylic acid esters co-polymer, ethylene vinyl acetate analog copolymer, polyvinyl acetate copolymer and degree of hydrolysis more than 85%；Water-keeping material is selected from least one of hydroxy acrylate, glycerine, porous inorganic material and high hydroscopic resin.When the anti-mildew fresh-keeping coating is applied to preservative film, mould inhibitor can prevent fruits and vegetables etc. from going mouldy, and vapor can be adsorbed by water-keeping material caused by fruits and vegetables respiration, and then avoid the problem of preservative film inwall condensation accelerates the transparency variation of preservative film and bacterial multiplication, and water-keeping material is after absorption reaches finite concentration, vapor can be slowly discharged into preservative film, and then effectively suppresses the moisture loss of fruits and vegetables, so as to realize preferable fresh-keeping effect.
Description
Technical field
The present invention relates to technical field of coatings, more particularly to a kind of anti-mildew fresh-keeping coating and its preparation method and application.
Background technology
The condition of the shorter article storage of the Storage periods such as fruits and vegetables is harsher, otherwise will be sent out because of microorganism amount reproduction
Change of mildewing makes it no longer fresh, loses original value.It is simply wrapped outer to completely cut off generally by preservative film in industry at present
Portion's oxygen and moisture, reach fresh-keeping purpose.But the fresh-keeping effect of this fresh-keeping mode is bad, in particular for preserving fruit and vegetable utilizing
When, steam caused by the respiration of fruits and vegetables itself easily causes bacteria breed in preservative film inwall condensation and gone mouldy, Jin Erjia
Fast fruits and vegetables rot.
The content of the invention
Based on this, it is necessary to provide preferable anti-mildew fresh-keeping coating of a kind of fresh-keeping effect and its preparation method and application.
A kind of anti-mildew fresh-keeping coating, by weight percentage composition include following component：Matrix resin 20%~50%, solvent
20%~70%, mould inhibitor 0.65%~25.5%, water-keeping material 0.3%~4% and auxiliary agent 0.2%~2%；
Wherein, the matrix resin be selected from polyurethane, acrylic acid esters co-polymer, ethylene-vinyl acetate analog copolymer,
At least one of the polyvinyl alcohol of polyvinyl acetate copolymer and degree of hydrolysis more than 85%；The water-keeping material is selected from hydroxyl
At least one of acrylate, glycerine, porous inorganic material and high hydroscopic resin.
Above-mentioned anti-mildew fresh-keeping coating, matrix resin is dissolved in solvent and by the film forming of auxiliary agent adjusting coating, and is controlled
Each component can form anti-mildew fresh-keeping coating in said ratio；Mould inhibitor and water-keeping material are using matrix resin as carrier, fully
It is scattered in matrix resin, and then prevents the effect of fungus growth and water-absorbing-retaining.The anti-mildew fresh-keeping coating is applied to protect
During fresh film, not only mould inhibitor can prevent fruits and vegetables etc. from going mouldy, and vapor can be protected caused by fruits and vegetables respiration
Water material adsorbs, and then avoids the problem of preservative film inwall condensation accelerates the transparency variation of preservative film and bacterial multiplication,
And water-keeping material can slowly discharge vapor, and then effectively suppress fruits and vegetables after absorption reaches finite concentration into preservative film
Moisture loss, so as to realize preferable fresh-keeping effect.
In one of the embodiments, the mould inhibitor is selected from sorbate, citrate, dehydroacetic acid salt, xanthoxlin
And at least one of catechin.
In one of the embodiments, the mould inhibitor includes sorbate, citrate, dehydroacetic acid salt, xanthoxlin
And catechin, the weight percentage in the anti-mildew fresh-keeping coating, the sorbate are 0.2%~4%, the lemon
Lemon hydrochlorate is 0.2%~6%, and the dehydroacetic acid salt is 0%~2%, and the xanthoxlin is 0~6%, and the catechin is
0.25%~7.5%.
In one of the embodiments, the mould inhibitor be sorbate, citrate, dehydroacetic acid salt, xanthoxlin and
The combination of catechin, and the sorbate, the citrate, the dehydroacetic acid salt, the xanthoxlin and the catechu
The mass ratio of element is 1:1~2:0.5~0.8:1~2:1~2.
In one of the embodiments, the mass ratio of the mould inhibitor and the water-keeping material is 4~6:1.
In one of the embodiments, the matrix resin is polyvinyl acetate copolymer and degree of hydrolysis more than 85%
The combination of polyvinyl alcohol；The water-keeping material is the combination of high hydroscopic resin and porous inorganic material, wherein the super absorbent resin
Fat is the polyvinyl alcohol that degree of hydrolysis is less than 80%.
In one of the embodiments, the porous inorganic material is porous silica, and the high hydroscopic resin with
The mass ratio of the porous inorganic material is 1:0.5~1.
A kind of preparation method of anti-mildew fresh-keeping coating, comprises the following steps：
The each component of above-mentioned anti-mildew fresh-keeping coating is provided；
The matrix resin and the solvent are well mixed, obtain mixed liquor；
The water-keeping material, the auxiliary agent and the mould inhibitor are sequentially added in the mixed liquor and is well mixed, is obtained
To the anti-mildew fresh-keeping coating.
In one of the embodiments, the mould inhibitor adds the mixed liquor in a manner of being added dropwise.
Application of the above-mentioned anti-mildew fresh-keeping coating in anti-mildew fresh-keeping coating is prepared.
Embodiment
For the ease of understand the present invention, the present invention will be described more fully below, and give the present invention compared with
Good embodiment.But the present invention can realize in many different forms, however it is not limited to embodiment described herein.Phase
Instead, there is provided the purpose of these embodiments is to make the understanding more thorough and comprehensive to the disclosure.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
The arbitrary and all combination of the Listed Items of pass.
The anti-mildew fresh-keeping coating of one embodiment, by weight percentage composition include following component：Matrix resin 20%~
50%th, solvent 20%~70%, mould inhibitor 0.65%~25.5%, water-keeping material 0.3%~4% and auxiliary agent 0.2%~2%.
Wherein, matrix resin is selected from polyurethane, acrylic acid esters co-polymer, ethylene-vinyl acetate analog copolymer (referred to as
EVA), in the polyvinyl alcohol (abbreviation PVA) of polyvinyl acetate copolymer (abbreviation PVAC) and degree of hydrolysis more than 85% at least
It is a kind of.Wherein, degree of hydrolysis, also referred to as alcoholysis degree, and degree of hydrolysis is more than 85% polyvinyl alcohol, it is water-soluble very well.
Wherein, water-keeping material is selected from hydroxy acrylate, glycerine, high hydroscopic resin, porous inorganic material and degree of hydrolysis
At least one of polyvinyl alcohol less than 80%.
Above-mentioned anti-mildew fresh-keeping coating, matrix resin is dissolved in solvent and by the film forming of auxiliary agent adjusting coating, and is controlled
Each component can form anti-mildew fresh-keeping coating in said ratio；Mould inhibitor and water-keeping material are using matrix resin as carrier, fully
It is scattered in matrix resin, and then prevents the effect of fungus growth and water-absorbing-retaining.The anti-mildew fresh-keeping coating is applied to protect
During fresh film, not only mould inhibitor can prevent fruits and vegetables etc. from going mouldy, and vapor can be protected caused by fruits and vegetables respiration
Water material adsorbs, and then avoids the problem of preservative film inwall condensation accelerates the transparency variation of preservative film and bacterial multiplication,
And water-keeping material can slowly discharge vapor, and then effectively suppress fruits and vegetables after absorption reaches finite concentration into preservative film
Moisture loss, so as to realize preferable fresh-keeping effect.
The anti-mildew fresh-keeping coating is applied to preservative film etc. and packs product, and fruits and vegetables can be made to carry out any anticorrosive mildewproof in itself
Sterilization fresh-keeping processing, clean fruits and vegetables need to be only placed in the packaging product such as preservative film, be killed by packing product mould proof in itself
Bacterium function, have the function that, to placing thing anti-mildew fresh-keeping in packaging product, effectively to extend fruits and vegetables in storage is transported
Freshness, be advantageous to fruits and vegetables transportation and packing enterprise and widely popularize, market application foreground is wide.
In addition, being found by studying, when the anti-mildew fresh-keeping coating is applied to preservative film, water-keeping material can be into preservative film
Slowly release vapor, and then ensure the humidity in preservative film, therefore, it is necessary to suitably improve mould proof after water-keeping material is added
The content of agent.So select said ratio.Preferably, the mass ratio of mould inhibitor and water-keeping material is 4~6:1.
Preferably, polyvinyl alcohol of the degree of hydrolysis in matrix resin more than 85% is selected from polyvinyl alcohol 1788, polyvinyl alcohol
At least one of 2088 and polyvinyl alcohol 2488.Polyvinyl alcohol 1788, polyvinyl alcohol 2088 and polyvinyl alcohol 2488 are water
The good polyvinyl alcohol of dissolubility.By taking polyvinyl alcohol 1788 as an example, it is that the degree of polymerization is 1700, and degree of hydrolysis is 88% polyethylene
Alcohol.
Preferably, this patent has been obtained scattered more uniform in aforementioned body resin by research in substantial amounts of mould inhibitor
And the mould inhibitor that performance is more stable, mould inhibitor is in sorbate, citrate, dehydroacetic acid salt, xanthoxlin and catechin
At least one.Alternatively, sorbate, citrate, dehydroacetic acid salt are its sodium salt or sylvite.
Further, the weight percentage in anti-mildew fresh-keeping coating, sorbate are 0.2%~4%, citric acid
Salt is 0.2%~6%, and dehydroacetic acid salt is 0%~2%, and xanthoxlin is 0~6%, and catechin is 0.25%~7.5%.Research
It was found that adding catechin in sorbate and citrate, anti-mold effect can be effectively improved, main cause is that catechin is water-soluble
Easily polymerization forms unformed tannin to liquid, and tannin is easily oxidized, and especially hydrolyzes weak base in sorbate and citrate etc.
Property under the conditions of aoxidize faster, therefore can be combined with protein play kill mould effect.Within the range, the group of each mould inhibitor
It is preferable to close anti-mold effect.
Further, the weight percentage in anti-mildew fresh-keeping coating, sorbate are 2%~4%, citric acid
Salt is 2%~6%, and dehydroacetic acid salt is 1%~2%, and xanthoxlin is 3~4%, and catechin is 4%~7.5%.Add simultaneously
Xanthoxlin and dehydroacetic acid salt act synergistically as mould inhibitor, reach preferable anti-mold effect.
Further, mould inhibitor is the combination of sorbate, citrate, dehydroacetic acid salt, xanthoxlin and catechin,
And sorbate, citrate, dehydroacetic acid salt, the mass ratio of xanthoxlin and catechin are 1:1~2:0.5~0.8:1~2:1
~2.
In one of the embodiments, high hydroscopic resin can be hydrolysis starch, graft acrylamide, high substituted degree crosslinking carboxylic
Methylcellulose, cross-linked carboxymethyl cellulose graft acrylamide, cross-linking type hydroxyethyl cellulose graft acrylamide polymer,
At least one of the polyvinyl alcohol of low-density cross-linked type polyethylene alcohol and degree of hydrolysis less than 80%.
In one of the embodiments, porous inorganic material can be porous silica, zeolite etc..
Further, matrix resin is the group of the polyvinyl alcohol of polyvinyl acetate copolymer and degree of hydrolysis more than 85%
Close, and water-keeping material is the combination of high hydroscopic resin and porous inorganic material；Wherein, high hydroscopic resin is that degree of hydrolysis is less than 80%
Polyvinyl alcohol.Contain polyvinyl alcohol in such matrix resin and in high hydroscopic resin, pass through polyvinyl alcohol when both act on
Intermolecular interaction, enable to high hydroscopic resin to be connected with matrix resin closer, avoiding the addition of high hydroscopic resin causes
The problem of hole increases between matrix resin.
Further, porous inorganic material is porous silica.And the quality of high hydroscopic resin and porous inorganic material
Than for 1:0.5~1.
Further, polyvinyl acetate copolymer and degree of hydrolysis are more than the matter of 85% polyvinyl alcohol in matrix resin
Amount is than being 1:0.5~1.
In one of the embodiments, solvent is selected from least one of water and ethanol.Using polyurethane, polyvinyl alcohol,
The water-soluble preferable resin such as ethylene-vinyl acetate analog copolymer, polyvinyl acetate copolymer, solvent can be water, with up to
To environmental protection and reduce the effect of cost.Preferably, solvent is that volume ratio is 1:The combination of 1 second alcohol and water.
In one of the embodiments, auxiliary agent is in surfactant, emulsifying agent, wetting agent, defoamer and sagging inhibitor
At least one.Wherein, surfactant is Tween 80 and sapn etc., and surfactant can be such that mould inhibitor divides in matrix resin
Dissipate more uniform.Emulsifying agent may advantageously facilitate water-soluble poor resin and form stable aqueous emulsion.
This patent additionally provides the preparation method of the above-mentioned anti-mildew fresh-keeping coating of an embodiment, comprise the following steps S1~
S3。
Step S1：The each component of above-mentioned anti-mildew fresh-keeping coating is provided.
Step S2：Matrix resin and solvent are well mixed, obtain mixed liquor.
Specifically, the temperature that matrix resin and solvent are mixed is 30~65 DEG C.
Specifically, step S2 comprises the following steps：Stirred simultaneously under being 100~300 revs/min in rotating speed by resin and solvent
It is heated to 30~65 DEG C of 5~15min of mixing.So control temperature and stirring intensity, promote mixed liquor to be well mixed.
Step S3：Water-keeping material, auxiliary agent and mould inhibitor are sequentially added in mixed liquor and is well mixed, obtains anti-mildew fresh-keeping
Coating.
Specifically, the temperature mixed in step S3 is 30~65 DEG C.
Preferably, mould inhibitor is added in mixed liquor in a manner of being added dropwise.
Specifically, step S3 comprises the following steps：Sequentially added in mixed liquor under rotating speed is 200~400 rev/min
Water-keeping material and auxiliary agent stir 30~60min, and mould inhibitor is added dropwise under being then 500~800 revs/min in rotating speed, is added dropwise mould proof
The time control of agent is in 1~2h, so that mould inhibitor is fully dispersed.
The preparation method of above-mentioned anti-mildew fresh-keeping coating, technique are simple, it is easy to accomplish, obtained anti-mildew fresh-keeping coating is applied to
During preservative film, it can not only prevent fruits and vegetables etc. from going mouldy, and vapor caused by fruits and vegetables respiration can be by water conservation material
Material absorption, and then the problem of preservative film inwall condensation accelerates the transparency variation of preservative film and bacterial multiplication is avoided, and
Water-keeping material can slowly discharge vapor after absorption reaches finite concentration into preservative film, and then effectively suppress the water of fruits and vegetables
It is scattered to lose, so as to realize preferable fresh-keeping effect.
This patent additionally provides application of the above-mentioned anti-mildew fresh-keeping coating of an embodiment in anti-mildew fresh-keeping coating is prepared.
Specifically, when above-mentioned anti-mildew fresh-keeping coating is applied to anti-mildew fresh-keeping coating, comprise the following steps：Anti-mildew fresh-keeping is applied
Material coating and thermally treated, obtained anti-mildew fresh-keeping coating.
Above-mentioned anti-mildew fresh-keeping coating is through Overheating Treatment so that matrix resin crosslinks reaction and forms network structure, mould proof
Agent and water-keeping material are well-dispersed in the network structure of matrix resin, obtain the good anti-mildew fresh-keeping coating of fresh-keeping effect.This is anti-
Mould fresh-keeping coating especially suitable for the Storage periods such as fruits and vegetables it is shorter, easily go mouldy in short-term and need to eat the fresh-keeping of article in time.
Further, the condition of heat treatment is to handle 5~10s in 80~120 DEG C.
Alternatively, the thickness of anti-mildew fresh-keeping coating is 0.5~10 μm.Then resin can not for the thickness low LCL of anti-mildew fresh-keeping coating
Effective film forming, then the effect of anti-mildew fresh-keeping can not embody.And the thickness of anti-mildew fresh-keeping coating is blocked up, not only cost increase, and
It can not be completely dried in heat treatment, it may appear that the bad phenomenon such as viscous is returned, and when not being completely dried, due to outer surface part
Dry, and internal still into liquid, during continuing to air-dry, be easy to coating occur due to spontaneously drying inside to open
Situation about splitting, this also can greatly reduce the effect of anti-mildew fresh-keeping coating.
It is specific embodiment below.
Embodiment 1
Raw material is provided, percentage composition by weight includes：Polyvinyl acetate copolymer 25%, the poly- second that degree of hydrolysis is 88%
Enol 25%, volume ratio 1:1 ethanol water mixed solvent 20%, potassium sorbate 4%, sodium citrate 6%, dehydroacetic acid
The polyvinyl alcohol 4% and Tween 80 that sodium is 2%, xanthoxlin 6%, catechin 7.5%, degree of hydrolysis are 78% are 0.5%.
By polyvinyl alcohol that polyvinyl acetate copolymer and degree of hydrolysis are 88% in ethanol water in the mixed solvent in rotating speed
It is well mixed to be stirred and heated to 50 DEG C under 300 revs/min；Obtain mixed liquor.
Hydroxy acrylate is sequentially added under rotating speed is 300 rev/min and Tween 80 stirs 60min in mixed liquor,
Then mould inhibitor potassium sorbate, sodium citrate, sodium dehydroacetate, xanthoxlin and catechu is added dropwise under being 800 revs/min in rotating speed
Element, the time control of mould inhibitor is added dropwise in 1~2h, to be well mixed, cooling obtains anti-mildew fresh-keeping coating.
By anti-mildew fresh-keeping coating coated in PE substrates, then at 120 DEG C of processing 1.2s, obtain containing anti-mildew fresh-keeping coating
PE preservative films.
Embodiment 2
The experimental procedure of embodiment 2 is substantially the same manner as Example 1, and difference is the composition of raw material：Percentage by weight
Content includes：Polyurethane 20%, volume ratio 1:1 ethanol water mixed solvent 70%, potassium sorbate 0.2%, sodium citrate
It is 0.5% for 0.2%, catechin 0.25%, hydroxy acrylate 4% and Tween 80.
Embodiment 3
The experimental procedure of embodiment 3 is substantially the same manner as Example 1, and difference is the composition of raw material：Percentage by weight
Content includes：Acrylic acid esters co-polymer 20%, ethylene-vinyl acetate analog copolymer 15%, volume ratio 1:1 ethanol water
Mixed solvent 40%, potassium sorbate 2%, sodium citrate 2%, sodium dehydroacetate 1.6%, xanthoxlin 2%, catechin
It is 0.2% for 2%, glycerine 1.2% and Tween 80.
Embodiment 4
The experimental procedure of embodiment 4 is substantially the same manner as Example 3, and difference is the part composition of raw material：Sorbic acid
Potassium is 2%, sodium citrate 4%, sodium dehydroacetate 1%, xanthoxlin 4%, catechin 1%, glycerine 2%.
Embodiment 5
The experimental procedure of embodiment 5 is substantially the same manner as Example 4, and difference is the part composition of raw material：Degree of hydrolysis
The combination of polyvinyl alcohol 1% and porous silica 3% that degree of hydrolysis is 78% is replaced with for 78% polyvinyl alcohol 4%.
Embodiment 6
The experimental procedure of embodiment 6 is substantially the same manner as Example 4, and difference is the part composition of raw material：Degree of hydrolysis
The combination of polyvinyl alcohol 2% and porous silica 2% that degree of hydrolysis is 78% is replaced with for 78% polyvinyl alcohol 4%.
The experimental procedure of comparative example 1~2 is substantially the same manner as Example 1, and difference is, is not contained in the raw material of comparative example 1
Degree of hydrolysis is 78% polyvinyl alcohol；The amount for the polyvinyl alcohol that the degree of hydrolysis contained in the raw material of comparative example 2 is 78% is 8%.
Fresh apple is wrapped up respectively using PE preservative films made from embodiment 1~6 and comparative example 1~2 to be tested, and is seen
Examine apple cosmetic variation situation.The one side for having anti-mildew fresh-keeping coating during test directly contacts with apple.Test condition is：Environment temperature
45 DEG C of degree (in order to shorten test period, it is the temperature higher than normal temperature to set test temperature), humidity 65%, test object：Apple,
Testing time：15 days, as a result it see the table below.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of anti-mildew fresh-keeping coating, it is characterised in that percentage composition includes following component by weight：Matrix resin 20%~
50%th, solvent 20%~70%, mould inhibitor 0.65%~25.5%, water-keeping material 0.3%~4% and auxiliary agent 0.2%~2%；
Wherein, the matrix resin is selected from polyurethane, acrylic acid esters co-polymer, ethylene-vinyl acetate analog copolymer, poly-vinegar
At least one of the polyvinyl alcohol of vinyl acetate copolymer and degree of hydrolysis more than 85%；The water-keeping material is selected from hydroxy
At least one of acid esters, glycerine, porous inorganic material and high hydroscopic resin.
2. anti-mildew fresh-keeping coating as claimed in claim 1, it is characterised in that the mould inhibitor is selected from sorbate, citric acid
At least one of salt, dehydroacetic acid salt, xanthoxlin and catechin.
3. anti-mildew fresh-keeping coating as claimed in claim 1, it is characterised in that the mould inhibitor includes sorbate, citric acid
Salt, dehydroacetic acid salt, xanthoxlin and catechin, the weight percentage in the anti-mildew fresh-keeping coating, the sorbic acid
Salt is 0.2%~4%, and the citrate is 0.2%~6%, and the dehydroacetic acid salt is 0%~2%, and the xanthoxlin is
0~6%, the catechin is 0.25%~7.5%.
4. anti-mildew fresh-keeping coating as claimed in claim 3, it is characterised in that the mould inhibitor be sorbate, citrate,
The combination of dehydroacetic acid salt, xanthoxlin and catechin, and the sorbate, the citrate, the dehydroacetic acid salt, institute
The mass ratio for stating xanthoxlin and the catechin is 1:1~2:0.5~0.8:1~2:1~2.
5. the anti-mildew fresh-keeping coating as described in any one of Claims 1 to 4, it is characterised in that the mould inhibitor and the water conservation
The mass ratio of material is 4~6:1.
6. the anti-mildew fresh-keeping coating as described in any one of Claims 1 to 4, it is characterised in that the matrix resin is poly-vinegar acid
The combination of the polyvinyl alcohol of vinyl ester copolymers and degree of hydrolysis more than 85%；The water-keeping material is high hydroscopic resin and porous nothing
The combination of machine material, wherein the high hydroscopic resin is the polyvinyl alcohol that degree of hydrolysis is less than 80%.
7. anti-mildew fresh-keeping coating as claimed in claim 6, it is characterised in that the porous inorganic material is porous silica
Silicon, and the mass ratio of the high hydroscopic resin and the porous inorganic material is 1:0.5~1.
8. a kind of preparation method of anti-mildew fresh-keeping coating, it is characterised in that comprise the following steps：
The each component of anti-mildew fresh-keeping coating as described in any one of claim 1~7 is provided；
The matrix resin and the solvent are well mixed, obtain mixed liquor；
The water-keeping material, the auxiliary agent and the mould inhibitor are sequentially added in the mixed liquor and is well mixed, obtains institute
State anti-mildew fresh-keeping coating.
9. the preparation method of anti-mildew fresh-keeping coating as claimed in claim 8, it is characterised in that the mould inhibitor is in a manner of being added dropwise
Add the mixed liquor.
10. application of the anti-mildew fresh-keeping coating in anti-mildew fresh-keeping coating is prepared as described in any one of claim 1~7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108794957A (en) * | 2018-07-04 | 2018-11-13 | 合肥帧讯低温科技有限公司 | A kind of Efficient antibacterial Perserving materials and preparation method thereof |
| CN113025121A (en) * | 2019-12-25 | 2021-06-25 | 广东德康化工实业有限公司 | Oxygen-resistant, fresh-keeping and corrosion-resistant water-based plastic printing ink and preparation method thereof |
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| CN106634129A (en) * | 2016-12-29 | 2017-05-10 | 常德市金润新材料科技有限公司无锡新材料研究院 | Mildewproof preservative film and preparation method thereof |
| CN107151939A (en) * | 2017-05-24 | 2017-09-12 | 常德金德镭射科技股份有限公司 | A kind of preparation method of the fruits and vegetables fresh-keeping coating paper of hydroxyapatite/chitosan |
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| CN106634129A (en) * | 2016-12-29 | 2017-05-10 | 常德市金润新材料科技有限公司无锡新材料研究院 | Mildewproof preservative film and preparation method thereof |
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Application publication date: 20180306 |