CN104877520A - Corrosion-resistant plastic-bag coating and preparation method thereof - Google Patents
Corrosion-resistant plastic-bag coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a corrosion-resistant plastic-bag coating and a preparation method thereof. The preparation method comprises the following steps: (1) enabling titanate, urushiol and epoxy resin to conduct contact reaction to prepare modified phenolphthalein resin; (2) mixing the modified phenolphthalein resin, epoxy resin, spider silk, loofah sponge, 2-Methoxy-4-methylphenol, ferric acetylacetonate, dimethylethanolamine, a microcapsule curing agent, a filler, an organic solvent and a dispersant to prepare the corrosion-resistant plastic-bag coating, wherein the capsule core of the microcapsule curing agent is diaminodiphenyl-methane, and the wall material is 2,2-toluene diisocyanate. The corrosion-resistant plastic-bag coating prepared by the preparation method can be firmly adhered to the surface of a plastic product, and has the characteristic of excellent acid, alkali and oil resistance.
Description
Technical field
The present invention relates to coating, particularly, relate to a kind of corrosion-resistant polythene bag coating and preparation method thereof.
Background technology
Plastic cement is that a class has plastic synthesized polymer material, defines the large synthetic materials of current daily life indispensable three with synthetic rubber, synthon.Specifically, plastic cement be with natural or synthetic resins for main component, add various additive, can mould under the condition such as certain temperature and pressure and make definite shape, at 25 DEG C, keep the material of shape invariance.There is following characteristics: 1, lightweight; 2, excellent chemical stability; 3, excellent electrical insulation capability; 4, the poor conductor of heat, has noise elimination and cushioning effect; 5, the specific tenacity that physical strength distribution is wide and higher.Because above-mentioned advantage makes plastic cement be widely used in daily life, as the use of polythene bag.
Although for the materials such as cloth, timber and bamboo, polythene bag has excellent chemical stability, and in the environment of strongly-acid, strong basicity or oiliness, polythene bag is often corroded and then causes the damage of plasthetics.At present, mainly through by coating application on polythene bag envelope to stop or to postpone the generation of breakoff phenomenon and the development of polythene bag, and then extend the work-ing life of polythene bag.But existing plastic coating corrosion resistance nature is not strong, is difficult to practical requirement.
Summary of the invention
The object of this invention is to provide a kind of corrosion-resistant polythene bag coating and preparation method thereof, obtain by this preparation method the surface that corrosion-resistant polythene bag coating can be attached to plasthetics securely, this coating has the characteristic of excellent acidproof, alkaline-resisting and oil resistant simultaneously.
To achieve these goals, the invention provides a kind of preparation method of corrosion-resistant polythene bag coating, comprising:
1) titanic acid ester, laccol and epoxy resin are carried out contact reacts and obtain modified paint phenolphthalein resin;
2) modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent, filler, organic solvent and dispersant are obtained corrosion-resistant polythene bag coating;
Wherein, the capsule-core of micro capsule curing agent is diaminodiphenyl-methane, and wall material is 2,2-tolylene diisocyanate.
Present invention also offers a kind of corrosion-resistant polythene bag coating, this corrosion-resistant polythene bag coating is prepared from by above-mentioned method.
Pass through technique scheme, make the corrosion-resistant polythene bag coating obtained can not only be attached to the surface of plasthetics securely by the synergy of modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent, filler, organic solvent and dispersion agent in preparation method provided by the invention, but also there is the characteristic of excellent acidproof, alkaline-resisting and oil resistant.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of preparation method of corrosion-resistant polythene bag coating, comprising:
1) titanic acid ester, laccol and epoxy resin are carried out contact reacts and obtain modified paint phenolphthalein resin;
2) modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent, filler, organic solvent and dispersant are obtained corrosion-resistant polythene bag coating;
Wherein, the capsule-core of micro capsule curing agent is diaminodiphenyl-methane, and wall material is 2,2-tolylene diisocyanate.
In step 1 of the present invention) in, the consumption of each material can be selected in wide scope, but in order to make modified paint phenolphthalein resin, there is more excellent productive rate, preferably, in step 1) in, relative to the laccol of 1 weight part, the consumption of titanic acid ester is 0.05-0.12 weight part, and the consumption of epoxy resin is 1-1.5 weight part.
In step 1 of the present invention) in, catalytic time and temperature can be selected in wide scope, but in order to modified paint phenolphthalein resin has more excellent productive rate, preferably, in step 1) in, contact reacts meets the following conditions: temperature of reaction is 30-50 DEG C, and the reaction times is 3-5h.
In step 2 of the present invention) in, the consumption of each material can be selected in wide scope, but it is more excellent acidproof in order to make the coating obtained have, the characteristic of alkaline-resisting and oil resistant, preferably, in step 2) in, relative to the epoxy resin of 100 weight parts, the consumption of modified paint phenolphthalein resin is 5-15 weight part, the consumption of spider silk is 1-4 weight part, the consumption of Vegetable Sponge of Luffa is 2-5 weight part, the consumption of 4-methyl guaiacol and 4 is 3-11 weight part, the consumption of ferric acetyl acetonade is 4-9 weight part, the consumption of dimethylethanolamine is 9-22 weight part, the consumption of micro capsule curing agent is 20-50 weight part, the consumption of filler is 15-30 weight part, the consumption of organic solvent is 60-80 weight part, the consumption of dispersion agent is 4-12 weight part.
In the present invention, the concrete kind of filler can be selected in wide scope, but in order to the characteristic making the coating obtained have more excellent acidproof, alkaline-resisting and oil resistant, preferably, filler is selected from one or more in talcum powder, aluminium powder, silica powder and white carbon black.
In the present invention, the concrete kind of organic solvent can be selected in wide scope, but in order to the characteristic making the coating obtained have more excellent acidproof, alkaline-resisting and oil resistant, preferably, organic solvent is selected from one or more in ethanol, propyl carbinol, dimethylbenzene and acetic acid.
In the present invention, the concrete kind of dispersion agent can be selected in wide scope, but in order to the characteristic making the coating obtained have more excellent acidproof, alkaline-resisting and oil resistant, preferably, dispersion agent is selected from one or more in fatty acid dispersion agent, aliphatic amide type dispersion agent, ester class dispersion agent and paraffin class dispersion agent.
In the present invention, the concrete kind of epoxy resin can be selected in wide scope, but in order to the characteristic making the coating obtained have more excellent acidproof, alkaline-resisting and oil resistant, preferably, epoxy resin meets the following conditions: viscosity is 2000-5000cps/25 DEG C, and epoxy equivalent (weight) is 160-180g/eq.
Simultaneously, the capsule-core of micro capsule curing agent is diaminodiphenyl-methane, wall material is 2,2-tolylene diisocyanate, the preparation method of micro capsule curing agent can be the preparation method of any one routine in this area, as interfacial polymerization, situ aggregation method and solvent evaporated method, but considers from the convenience of productive rate and operation, preferably, the preparation method of micro capsule curing agent comprises:
A, diaminodiphenyl-methane and 2,2-tolylene diisocyanate are scattered in toluene tetrachloride, then add the obtained emulsion of aqueous gelatin solution mixing;
B, emulsion to be mixed with sodium dodecyl benzene sulfonate aqueous solution, then heat-treat obtained micro capsule curing agent.
In the step a of the preparation method of above-mentioned micro capsule curing agent, the concrete consumption of each material can be selected in wide scope, but in order to emulsion can be formed quickly, preferably, with the diaminodiphenyl-methane of 1 weight part for benchmark, the consumption of 2,2-tolylene diisocyanate is 0.5-1.5 weight part, the consumption of toluene tetrachloride is 50-80 weight part, and the consumption of aqueous gelatin solution is 4-7 weight part;
In the step b of the preparation method of above-mentioned micro capsule curing agent, the concrete consumption of each material can be selected in wide scope, but solidification can be played in time to make the micro capsule curing agent obtained, preferably, with the emulsion of 100 weight parts, the consumption of sodium dodecyl benzene sulfonate aqueous solution is 150-180 weight part.
In the step a of the preparation method of above-mentioned micro capsule curing agent, in aqueous gelatin solution, concentration can be selected in wide scope, but in order to make diaminodiphenyl-methane and 2,2-tolylene diisocyanate can emulsification more in time, preferably, in aqueous gelatin solution, the content of gelatin is 0.5-1.5 % by weight, and in sodium dodecyl benzene sulfonate aqueous solution, the content of Sodium dodecylbenzene sulfonate is 0.8-1.2 % by weight.
In the step b of the preparation method of above-mentioned micro capsule curing agent, heat treated actual conditions can be selected in wide scope, but in order to make obtained micro capsule curing agent can have more excellent productive rate, preferably, thermal treatment meets the following conditions: temperature is 40-50 DEG C, and the time is 4-6h.
Present invention also offers a kind of corrosion-resistant polythene bag coating, this corrosion-resistant polythene bag coating is prepared from by above-mentioned method.
Below will be described the present invention by embodiment.In following examples, oil-proofness detects is undertaken by methylene dichloride pickling process (dipping 10min); Alkali resistance detects by being the sodium hydroxide solution of 5% at polythene bag surface smear massfraction, carries out observation and record after placing 3h; Acid resistance detects by being the hydrochloric acid soln of 10% at polythene bag surface smear massfraction, carries out observation and record after placing 3h.
Preparation example 1
A, at 25 DEG C, diaminodiphenyl-methane and 2,2-tolylene diisocyanate are scattered in toluene tetrachloride, then add aqueous gelatin solution (content of gelatin is 1 % by weight) mixing 1h and obtain emulsion; The weight ratio of diaminodiphenyl-methane, 2,2-tolylene diisocyanates, toluene tetrachloride and aqueous gelatin solution is 1:1:65:6.
B, at 25 DEG C, mixed with sodium dodecyl benzene sulfonate aqueous solution (content of Sodium dodecylbenzene sulfonate is 1 % by weight) by emulsion, then at 45 DEG C, thermal treatment 5h obtains micro capsule curing agent D1; Wherein, the mass ratio of emulsion and sodium dodecyl benzene sulfonate aqueous solution is 100:165.
Preparation example 2
A, at 25 DEG C, diaminodiphenyl-methane and 2,2-tolylene diisocyanate are scattered in toluene tetrachloride, then add aqueous gelatin solution (content of gelatin is 0.5 % by weight) mixing 1h and obtain emulsion; The weight ratio of diaminodiphenyl-methane, 2,2-tolylene diisocyanates, toluene tetrachloride and aqueous gelatin solution is 1:0.5:50:4.
B, at 25 DEG C, mixed with sodium dodecyl benzene sulfonate aqueous solution (content of Sodium dodecylbenzene sulfonate is 0.8 % by weight) by emulsion, then at 40 DEG C, thermal treatment 4h obtains micro capsule curing agent D2; Wherein, the mass ratio of emulsion and sodium dodecyl benzene sulfonate aqueous solution is 100:150.
Preparation example 3
A, at 25 DEG C, diaminodiphenyl-methane and 2,2-tolylene diisocyanate are scattered in toluene tetrachloride, then add aqueous gelatin solution (content of gelatin is 1.5 % by weight) mixing 1h and obtain emulsion; The weight ratio of diaminodiphenyl-methane, 2,2-tolylene diisocyanates, toluene tetrachloride and aqueous gelatin solution is 1:1.5:80:7.
B, at 25 DEG C, mixed with sodium dodecyl benzene sulfonate aqueous solution (content of Sodium dodecylbenzene sulfonate is 1.2 % by weight) by emulsion, then at 50 DEG C, thermal treatment 6h obtains micro capsule curing agent D3; Wherein, the mass ratio of emulsion and sodium dodecyl benzene sulfonate aqueous solution is 100:180.
Embodiment 1
1) at 40 DEG C, titanic acid ester, laccol and epoxy resin (viscosity is 3000cps/25 DEG C, and epoxy equivalent (weight) is 170g/eq) are carried out contact reacts 4h and obtains modified paint phenolphthalein resin; Wherein, the weight ratio of laccol, titanic acid ester and epoxy resin is 1:0.08:1.2.
2) at 25 DEG C, above-mentioned modified paint phenolphthalein resin, epoxy resin (viscosity is 3000cps/25 DEG C, and epoxy equivalent (weight) is 170g/eq), spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D1, silica powder, propyl carbinol and paraffin mixing 5h are obtained corrosion-resistant polythene bag coating A1; Wherein, the weight ratio of modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D1, silica powder, propyl carbinol and paraffin is 100:10:3:3:7:6:15:30:22:70:8.
Embodiment 2
1) at 30 DEG C, titanic acid ester, laccol and epoxy resin (viscosity is 2000cps/25 DEG C, and epoxy equivalent (weight) is 160g/eq) are carried out contact reacts 3h and obtains modified paint phenolphthalein resin; Wherein, the weight ratio of laccol, titanic acid ester and epoxy resin is 1:0.05:1.
2) at 25 DEG C, above-mentioned modified paint phenolphthalein resin, epoxy resin (viscosity is 2000cps/25 DEG C, and epoxy equivalent (weight) is 160g/eq), spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D2, talcum powder, ethanol and vinyl bis-stearamides mixing 5h are obtained corrosion-resistant polythene bag coating A2; Wherein, the weight ratio of modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D2, silica powder, propyl carbinol and paraffin is 100:5:1:2:3:4:9:20:15:60:4.
Embodiment 3
1) at 30-50 DEG C, titanic acid ester, laccol and epoxy resin (viscosity is 5000cps/25 DEG C, and epoxy equivalent (weight) is 180g/eq) are carried out contact reacts 5h and obtains modified paint phenolphthalein resin; Wherein, the weight ratio of laccol, titanic acid ester and epoxy resin is 1:0.12:1.5.
2) at 25 DEG C, above-mentioned modified paint phenolphthalein resin, epoxy resin (viscosity is 5000cps/25 DEG C, and epoxy equivalent (weight) is 180g/eq), spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D3, white carbon black, acetic acid and glyceryl monostearate mixing 5h are obtained corrosion-resistant polythene bag coating A3; Wherein, the weight ratio of modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent D3, silica powder, propyl carbinol and paraffin is 100:15:4:5:11:9:22:50:30:80:12.
Comparative example 1
Carry out obtained corrosion-resistant polythene bag coating B1 according to the method for embodiment 1, difference is, step 2) middle without modified paint phenolphthalein resin.
Comparative example 2
Carry out obtained corrosion-resistant polythene bag coating B2 according to the method for embodiment 1, difference is, step 2) middle without spider silk.
Comparative example 3
Carry out obtained corrosion-resistant polythene bag coating B3 according to the method for embodiment 1, difference is, step 2) middle without Vegetable Sponge of Luffa.
Comparative example 4
Carry out obtained corrosion-resistant polythene bag coating B4 according to the method for embodiment 1, difference is, step 2) in micro capsule curing agent is changed to p-hydroxybenzenyl sulfonate.
Comparative example 5
Carry out obtained corrosion-resistant polythene bag coating B5 according to the method for embodiment 1, difference is, step 2) middle without micro capsule curing agent.
Comparative example 6
Carry out obtained corrosion-resistant polythene bag coating B6 according to the method for embodiment 1, difference is, step 2) middle without 4-methyl guaiacol and 4.
Comparative example 7
Carry out obtained corrosion-resistant polythene bag coating B7 according to the method for embodiment 1, difference is, step 2) middle without ferric acetyl acetonade.
Test example 1
Oil resistance detects:
By on above-mentioned corrosion-resistant polythene bag coating application to plastic film until coating is dry, be then placed in methylene dichloride and flood 10min, then observe the dope layer on plastic film surface.Concrete the results are shown in Table 1.
Test example 2
Alkaline resistance properties detects:
By on above-mentioned corrosion-resistant polythene bag coating application to plastic film until coating is dry, be then that the sodium hydroxide solution of 5% is painted on dope layer by massfraction, place the dope layer carrying out observing plastic film surface after 3h.Concrete the results are shown in Table 1.
Test example 3
Acid resistance detects:
By on above-mentioned corrosion-resistant polythene bag coating application to plastic film until coating is dry, be then that the hydrochloric acid soln of 10% is painted on dope layer by massfraction, place the dope layer carrying out observing plastic film surface after 3h.Concrete the results are shown in Table 1.
Table 1
| Oil-proofness detects | Alkali resistance detects | Acid resistance detects | |
| A1 | Surface is not inferior to 4L | Nondiscoloration, without bubbling, do not play spot | Nondiscoloration, without bubbling, do not play spot |
| A2 | Surface is not inferior to 4L | Nondiscoloration, without bubbling, do not play spot | Nondiscoloration, without bubbling, do not play spot |
| A3 | Surface is not inferior to 4L | Nondiscoloration, without bubbling, do not play spot | Nondiscoloration, without bubbling, do not play spot |
| B1 | Surface is inferior to 4L | Nondiscoloration, bubbling, a spot | Variable color, without bubbling, rise spot |
| B2 | Surface is inferior to 4L | Variable color, without bubbling, rise spot | Variable color, bubbling, a spot |
| B3 | Surface is inferior to 4L | Nondiscoloration, bubbling, a spot | Variable color, without bubbling, rise spot |
| B4 | Surface is inferior to 4L | Nondiscoloration, bubbling, do not play spot | Nondiscoloration, bubbling, a spot |
| B5 | Surface is inferior to 4L | Variable color, bubbling, a spot | Nondiscoloration, bubbling, a spot |
| B6 | Surface is inferior to 4L | Variable color, without bubbling, do not play spot | Variable color, bubbling, a spot |
| B7 | Surface is inferior to 4L | Variable color, bubbling, do not play spot | Nondiscoloration, bubbling, a spot |
By known in above-described embodiment, comparative example and test example, corrosion-resistant polythene bag coating provided by the invention makes this corrosion-resistant polythene bag coating have the characteristic of excellent acidproof, alkaline-resisting and oil resistant by the synergy between each raw material.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a preparation method for corrosion-resistant polythene bag coating, is characterized in that, comprising:
1) titanic acid ester, laccol and epoxy resin are carried out contact reacts and obtain modified paint phenolphthalein resin;
2) described modified paint phenolphthalein resin, epoxy resin, spider silk, Vegetable Sponge of Luffa, 4-methyl guaiacol and 4, ferric acetyl acetonade, dimethylethanolamine, micro capsule curing agent, filler, organic solvent and dispersant are obtained corrosion-resistant polythene bag coating;
Wherein, the capsule-core of described micro capsule curing agent is diaminodiphenyl-methane, and wall material is 2,2-tolylene diisocyanate.
2. preparation method according to claim 1, wherein, in step 1) in, relative to the laccol of 1 weight part, the consumption of described titanic acid ester is 0.05-0.12 weight part, and the consumption of described epoxy resin is 1-1.5 weight part.
3. preparation method according to claim 2, wherein, in step 1) in, described contact reacts meets the following conditions: temperature of reaction is 30-50 DEG C, and the reaction times is 3-5h.
4. according to the preparation method in claim 1-3 described in any one, wherein, in step 2) in, relative to the epoxy resin of 100 weight parts, the consumption of described modified paint phenolphthalein resin is 5-15 weight part, the consumption of described spider silk is 1-4 weight part, the consumption of described Vegetable Sponge of Luffa is 2-5 weight part, the consumption of described 4-methyl guaiacol and 4 is 3-11 weight part, the consumption of described ferric acetyl acetonade is 4-9 weight part, the consumption of described dimethylethanolamine is 9-22 weight part, the consumption of described micro capsule curing agent is 20-50 weight part, the consumption of described filler is 15-30 weight part, the consumption of described organic solvent is 60-80 weight part, the consumption of described dispersion agent is 4-12 weight part.
5. preparation method according to claim 4, wherein, described filler be selected from talcum powder, aluminium powder, silica powder and white carbon black one or more.
6. preparation method according to claim 4, wherein, described organic solvent be selected from ethanol, propyl carbinol, dimethylbenzene and acetic acid one or more.
7. preparation method according to claim 4, wherein, described dispersion agent be selected from fatty acid dispersion agent, aliphatic amide type dispersion agent, ester class dispersion agent and paraffin class dispersion agent one or more.
8. preparation method according to claim 7, wherein, described epoxy resin meets the following conditions: viscosity is 2000-5000cps/25 DEG C, and epoxy equivalent (weight) is 160-180g/eq.
9. according to the preparation method in claim 1-8 described in any one, wherein, described preparation method also comprises:
A, diaminodiphenyl-methane and 2,2-tolylene diisocyanate are scattered in toluene tetrachloride, then add the obtained emulsion of aqueous gelatin solution mixing;
B, described emulsion to be mixed with sodium dodecyl benzene sulfonate aqueous solution, then heat-treat obtained micro capsule curing agent;
Preferably, with the described diaminodiphenyl-methane of 1 weight part for benchmark, the consumption of described 2,2-tolylene diisocyanates is 0.5-1.5 weight part, and the consumption of described toluene tetrachloride is 50-80 weight part, and the consumption of institute's gelatin water solution is 4-7 weight part;
More preferably, with the described emulsion of 100 weight parts, the consumption of described sodium dodecyl benzene sulfonate aqueous solution is 150-180 weight part;
Further preferably, in institute's gelatin water solution, the content of gelatin is 0.5-1.5 % by weight, and in described sodium dodecyl benzene sulfonate aqueous solution, the content of Sodium dodecylbenzene sulfonate is 0.8-1.2 % by weight;
Still more preferably, described thermal treatment meets the following conditions: temperature is 40-50 DEG C, and the time is 4-6h.
10. a corrosion-resistant polythene bag coating, is characterized in that, described corrosion-resistant polythene bag coating is prepared from by the method in claim 1-9 described in any one.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109294306A (en) * | 2018-09-04 | 2019-02-01 | 中国石油天然气集团公司 | A kind of anticorrosive coating and its manufacture, application method |
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Application publication date: 20150902 |