CN106811078A - Protection film composition based on modified silicasol emulsion - Google Patents
Protection film composition based on modified silicasol emulsion Download PDFInfo
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- CN106811078A CN106811078A CN201510891911.2A CN201510891911A CN106811078A CN 106811078 A CN106811078 A CN 106811078A CN 201510891911 A CN201510891911 A CN 201510891911A CN 106811078 A CN106811078 A CN 106811078A
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Abstract
The invention discloses the protection film composition based on modified silicasol emulsion, it is obtained by the raw material of following mass fraction：Aliphatic Polyester Aqueous Polyurethane Dispersions 60 ~ 80%, modified silicasol 5 ~ 10%, titanium dioxide 2 ~ 5%, mica 3 ~ 5%, aqueous silicone oil 1 ~ 3%, neopelex 0.1 ~ 0.5%, alkali soluble is swollen acrylic thickener 0.5 ~ 1%, polyether-modified dimethyl siloxane 0.3 ~ 0.6%, acrylic acid copolymer sodium salt 0.1 ~ 0.5%, organic silicon modified by polyether 0.1 ~ 0.5%, balance of distilled water.In the present invention, from Aliphatic Polyester Aqueous Polyurethane Dispersions and modified silicasol compounding as film forming matter, mechanical strength, strippable property and the tolerance to acid-base salt solution of coating can be improved.From mica as filler, the performances such as hardness, intensity, wearability and the base material adhesive force of coating film can be improved.
Description
Technical field
The present invention relates to decorating field, more particularly, to the protection film composition based on modified silicasol emulsion.
Background technology
To prevent material or half product under the atmospheric environment to be contaminated, corrode and damage, and increase the service life, it will usually there is the coating of good protective and strippable property in their surface smear it is carried out effective and interim to seal protection up for safekeeping.In this way, can both isolate air, salt fog, the invasion of microorganism in the external world, antiseptic effect is reached；The effect of decontamination can be cleaned to reach by adsorbing pollutant again.For compared with solvent-borne type protective coating, aqueous protective coating has more security and the feature of environmental protection, thus is widely used in the decorating field of product.But, existing aqueous protective coating still has the shortcomings that coating strength is low, strippable property is poor and barrier propterty is single.
The content of the invention
The purpose of the present invention is the defect for overcoming above-mentioned prior art, there is provided the protection film composition based on modified silicasol emulsion, and effective closing protection can be carried out to protected object, has the advantages that strippable property is good, coating strength is high, cohesive force is strong and stability is strong.
The purpose of the present invention is achieved through the following technical solutions：
Protection film composition based on modified silicasol emulsion, is obtained by the raw material of following mass fraction：Aliphatic Polyester Aqueous Polyurethane Dispersions 60 ~ 80%, modified silicasol 5 ~ 10%, titanium dioxide 2 ~ 5%, mica 3 ~ 5%, aqueous silicone oil 1 ~ 3%, neopelex 0.1 ~ 0.5%, alkali soluble is swollen acrylic thickener 0.5 ~ 1%, polyether-modified dimethyl siloxane 0.3 ~ 0.6%, acrylic acid copolymer sodium salt 0.1 ~ 0.5%, organic silicon modified by polyether 0.1 ~ 0.5%, balance of distilled water；The Aliphatic Polyester Aqueous Polyurethane Dispersions are obtained by the raw material of following quality proportioning：40 ~ 80 parts of IPDI, 25 ~ 40 parts of polypropylene glycol, 25 ~ 80 parts of polyethylene glycol, 3 ~ 10 parts of dihydromethyl propionic acid, 50 ~ 80 parts of butanone, 5 ~ 12 parts of diethylenetriamine, 3 ~ 9 parts of triethylamine, 1 ~ 3 part of dibutyl tin laurate, 40 ~ 80 parts of distilled water；The modified silicasol is obtained by the raw material of following quality proportioning：40 ~ 60 parts of alkaline silica sol, 30 ~ 50 parts of ethanol, 1 ~ 6 part of propyl trimethoxy silicane.
Aqueous protective coating is mainly made up of film forming matter, color stuffing, auxiliary agent and solvent.Wherein, film forming matter is the nucleus of protective coating, and the present invention, as film forming matter, can improve mechanical strength, strippable property and the tolerance to acid-base salt solution of coating from Aliphatic Polyester Aqueous Polyurethane Dispersions and modified silicasol compounding.The following raw material is selected in the preparation of Aliphatic Polyester Aqueous Polyurethane Dispersions：The reaction of isocyanate groups and hydroxyl is carried out with polyethylene glycol from IPDI and polypropylene glycol, the mechanical property and water resistance of film forming can be improved.From diethylenetriamine as chain extender, it can carry out crosslinking chain extension to system, can so improve the tensile strength of coating film.
To improve stability when alkaline silica sol is compounded with Aliphatic Polyester Aqueous Polyurethane Dispersions, the present invention has carried out surface modification treatment to alkaline silica sol.Wherein, from propyl trimethoxy silicane as silane coupler, protection film composition stabilization under room temperature environment can be enable to store 6 ~ 12 months and occur without gelatin phenomenon.The addition of modified silicasol can make in the nano-silica filled film to coating, and the segment of silica can constitute the network-like structure for mutually running through with the organic high molecular polymer in coating and mica, so, the pliability of organic polymer can be improved, meanwhile, coating film bulk strength and hardness can also be improved.Because the permeability of modified silicasol is fabulous, it can be penetrated into inside protected base material so that coating film is securely attached on base material.Modified silicasol can also improve the consistency of coating film, can so prevent moisture and other media from invading, and then improve the corrosion resistance of film.
Color stuffing is indispensable part in formulation for coating material, and coloring and filling effect are played in coating.Titanium dioxide is the very good Chinese white of covering power, and with good ultraviolet radiation absorption function of shielding.From mica as filler, the performances such as hardness, intensity, wearability and the base material adhesive force of coating film can be improved.Alkali soluble is swollen, and acrylic thickener can improve the viscosity of dispersion, be conducive to dispersion of the mica in system, prevent mica from sinking to luming；The denseness of coating can also be increased simultaneously, the stability of coating is improved.The base material adhesive force of adjusting coating film is capable of in the use of aqueous silicone oil, film is had preferable peeling effect.Used as wetting agent, it can reduce the surface tension of coating film to neopelex, coating film cissing phenomenon is occurred, is prevented from making application uneven because protected object is unclean with soaking base material, reduction well.Because color stuffing all has hydrophobicity, thus their less stables in water, easily reunite and sink.And pass through to add acrylic acid copolymer sodium salt, then can keep dispersiveness of the color stuffing in water.Polyether-modified dimethyl siloxane is used as levelling agent, it is possible to decrease the interfacial tension between coating and ground, improves the phenomenons such as coating is bad to shrinkage cavity that by the wetability of ground, reduction causes by ground, adhesive force.Coating is required for various artificial and mechanically actuateds in production, storage and work progress, foam is so easily caused to produce, and foam can hinder the dispersion of mica, and film coated surface is caused to form pin hole and shrinkage cavity, so as to influence the outward appearance of coating film, anti-corrosive properties and weatherability.And add the organic silicon modified by polyether can be then effectively improved above mentioned problem.
To ensure isocyanate group-NCO and being smoothed out that the hydroxyl-OH reacts, further, the mol ratio of the isocyanate group-NCO and hydroxyl-OH is 2.6 ~ 4 in the raw material of the Aliphatic Polyester Aqueous Polyurethane Dispersions:1.As-NCO/-OH ＜ 2.6, the viscosity of product can be increased, and be difficult dispersion；And as-NCO/-OH ＞ 4, the easy gel of Aliphatic Polyester Aqueous Polyurethane Dispersions reduces storage period.
To reach good neutralization, further, the addition of the triethylamine and the dihydromethyl propionic acid equimolar amounts.
It is that balance is reached between adhesive force and peel strength, further, the modified silicasol is 1 with the mass ratio of the Aliphatic Polyester Aqueous Polyurethane Dispersions:4.The consumption of modified silicasol directly affects the combination property and production cost of coating.Specifically, when the addition of modified silicasol is excessive, not only result in film and become fragile, film adhesive is excessive, be unfavorable for peeling off；The stability of coating system can be also influenceed, increases the production cost of coating.And modified silicasol consumption it is very few when, active force of the nano-particle in coating is weaker, so causes the performance improvement effect of coating unobvious.Therefore consumption of the modified silicasol in coating must be rationally appropriate.When the present invention is from the ratio, may be such that the tensile strength and elongation at break of coating film is strengthened, while moderate peel strength is also maintained, good acid and alkali-resistance salt performance.
To improve stability of the color stuffing in system, further, the addition of the acrylic acid copolymer sodium salt is the 2 ~ 4% of the titanium dioxide and mica total amount.
Further, the solid content of the ethanol and the mass ratio of the solid content of the alkaline silica sol are 1:1.Adding ethanol can slow down self condensing for silanol in propyl trimethoxy silicane, most of silanol is set to participate in the modified-reaction to alkaline silica sol, but amount of alcohol is excessive and is unfavorable for modified-reaction, thus the mass ratio of silica in ethanol and alkaline silica sol is controlled 1:1.
Further, the addition of the propyl trimethoxy silicane accounts for the 4 ~ 6% of the alkaline silica sol solid content.The consumption of propyl trimethoxy silicane must can just have good modified effect enough.If consumption is not enough, can cause that the silicone hydroxyl of alkaline silica sol particle surface is modified incomplete；If consumption is excessive, unnecessary propyl trimethoxy silicane it may happen that some side reactions and make particle aggregation or crosslinking.
The invention has the advantages that：Obtained protection film composition of the invention can carry out effective closing protection to protected object, prevent protected object to be contaminated, corrode and damage.Meanwhile, the coating also has stronger cohesive force, good strippable property, coating strength higher and stability higher.Specifically, mechanical strength, strippable property and the tolerance to acid-base salt solution of coating can be improved as film forming matter from Aliphatic Polyester Aqueous Polyurethane Dispersions and modified silicasol compounding.From mica as filler, the performances such as hardness, intensity, wearability and the base material adhesive force of coating film can be improved.The viscosity of dispersion can be improved from the swollen acrylic thickener of alkali soluble, increases the denseness of coating, improve the stability of coating.From aqueous silicone oil as remover, the base material adhesive force of energy adjusting coating film improves the rippability of film.From neopelex as wetting agent, coating can be enable film cissing phenomenon occur with soaking base material, reduction well.From acrylic acid copolymer sodium salt as dispersant, dispersiveness of the color stuffing in water can be kept.From polyether-modified dimethyl siloxane as levelling agent, it is possible to decrease the interfacial tension between coating and ground, coating is improved to by the wetability of ground.From organic silicon modified by polyether as defoamer, the generation of foam can be reduced, so as to improve the outward appearance of coating film, anti-corrosive properties and weatherability.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1
Protection film composition based on modified silicasol emulsion, is obtained by the raw material of following mass fraction：Aliphatic Polyester Aqueous Polyurethane Dispersions 60 ~ 80%, modified silicasol 5 ~ 10%, titanium dioxide 2 ~ 5%, mica 3 ~ 5%, aqueous silicone oil 1 ~ 3%, neopelex 0.1 ~ 0.5%, alkali soluble is swollen acrylic thickener 0.5 ~ 1%, polyether-modified dimethyl siloxane 0.3 ~ 0.6%, acrylic acid copolymer sodium salt 0.1 ~ 0.5%, organic silicon modified by polyether 0.1 ~ 0.5%, balance of distilled water；The Aliphatic Polyester Aqueous Polyurethane Dispersions are obtained by the raw material of following quality proportioning：40 ~ 80 parts of IPDI, 25 ~ 40 parts of polypropylene glycol, 25 ~ 80 parts of polyethylene glycol, 3 ~ 10 parts of dihydromethyl propionic acid, 50 ~ 80 parts of butanone, 5 ~ 12 parts of diethylenetriamine, 3 ~ 9 parts of triethylamine, 1 ~ 3 part of dibutyl tin laurate, 40 ~ 80 parts of distilled water；The modified silicasol is obtained by the raw material of following quality proportioning：40 ~ 60 parts of alkaline silica sol, 30 ~ 50 parts of ethanol, 1 ~ 6 part of propyl trimethoxy silicane.
Aqueous protective coating is mainly made up of film forming matter, color stuffing, auxiliary agent and solvent.Wherein, film forming matter is the nucleus of protective coating, and the present invention, as film forming matter, can improve mechanical strength, strippable property and the tolerance to acid-base salt solution of coating from Aliphatic Polyester Aqueous Polyurethane Dispersions and modified silicasol compounding.The following raw material is selected in the preparation of Aliphatic Polyester Aqueous Polyurethane Dispersions：The reaction of isocyanate groups and hydroxyl is carried out with polyethylene glycol from IPDI and polypropylene glycol, the mechanical property and water resistance of film forming can be improved.In the reaction, butanone is added to reduce the viscosity of primary product.From diethylenetriamine as chain extender, it can carry out crosslinking chain extension to system, can so improve the tensile strength of coating film.
To improve stability when alkaline silica sol is compounded with Aliphatic Polyester Aqueous Polyurethane Dispersions, the present invention has carried out surface modification treatment to alkaline silica sol.Wherein, from propyl trimethoxy silicane as silane coupler, protection film composition stabilization under room temperature environment can be enable to store 6 ~ 12 months and occur without gelatin phenomenon.The addition of modified silicasol can make in the nano-silica filled film to coating, and the segment of silica can constitute the network-like structure for mutually running through with the organic high molecular polymer in coating and mica, so, the pliability of organic polymer can be improved, meanwhile, coating film bulk strength and hardness can also be improved.Because the permeability of modified silicasol is fabulous, it can be penetrated into inside protected base material so that coating film is securely attached on base material.Modified silicasol can also improve the consistency of coating film, can so prevent moisture and other media from invading, and then improve the corrosion resistance of film.
Color stuffing is indispensable part in formulation for coating material, and coloring and filling effect are played in coating.Titanium dioxide is the very good Chinese white of covering power, and with good ultraviolet radiation absorption function of shielding.From mica as filler, the performances such as hardness, intensity, wearability and the base material adhesive force of coating film can be improved.Alkali soluble is swollen, and acrylic thickener can improve the viscosity of dispersion, be conducive to dispersion of the mica in system, prevent mica from sinking to luming；The denseness of coating can also be increased simultaneously, the stability of coating is improved.The base material adhesive force of adjusting coating film is capable of in the use of aqueous silicone oil, film is had preferable peeling effect.Used as wetting agent, it can reduce the surface tension of coating film to neopelex, coating film cissing phenomenon is occurred, is prevented from making application uneven because protected object is unclean with soaking base material, reduction well.Because color stuffing all has hydrophobicity, thus their less stables in water, easily reunite and sink.And pass through to add acrylic acid copolymer sodium salt, then can keep dispersiveness of the color stuffing in water.Polyether-modified dimethyl siloxane is used as levelling agent, it is possible to decrease the interfacial tension between coating and ground, improves the phenomenons such as coating is bad to shrinkage cavity that by the wetability of ground, reduction causes by ground, adhesive force.Coating is required for various artificial and mechanically actuateds in production, storage and work progress, foam is so easily caused to produce, and foam can hinder the dispersion of mica, and film coated surface is caused to form pin hole and shrinkage cavity, so as to influence the outward appearance of coating film, anti-corrosive properties and weatherability.And add the organic silicon modified by polyether can be then effectively improved above mentioned problem.
To ensure isocyanate group-NCO and being smoothed out that the hydroxyl-OH reacts, it is preferable that the mol ratio of the isocyanate group-NCO and hydroxyl-OH is 2.6 ~ 4 in the raw material of the Aliphatic Polyester Aqueous Polyurethane Dispersions:1.As-NCO/-OH ＜ 2.6, the viscosity of product can be increased, and be difficult dispersion；And as-NCO/-OH ＞ 4, the easy gel of Aliphatic Polyester Aqueous Polyurethane Dispersions reduces storage period.
To reach good neutralization, it is preferable that the addition of the triethylamine and the dihydromethyl propionic acid equimolar amounts.
It is that balance is reached between adhesive force and peel strength, it is preferable that the modified silicasol is 1 with the mass ratio of the Aliphatic Polyester Aqueous Polyurethane Dispersions:4.The consumption of modified silicasol directly affects the combination property and production cost of coating.Specifically, when the addition of modified silicasol is excessive, not only result in film and become fragile, film adhesive is excessive, be unfavorable for peeling off；The stability of coating system can be also influenceed, increases the production cost of coating.And modified silicasol consumption it is very few when, active force of the nano-particle in coating is weaker, so causes the performance improvement effect of coating unobvious.Therefore consumption of the modified silicasol in coating must be rationally appropriate.When the present invention is from the ratio, may be such that the tensile strength and elongation at break of coating film is strengthened, while moderate peel strength is also maintained, good acid and alkali-resistance salt performance.
To improve stability of the color stuffing in system, it is preferable that the addition of the acrylic acid copolymer sodium salt is the 2 ~ 4% of the titanium dioxide and mica total amount.
Preferably, the solid content of the ethanol and the mass ratio of the solid content of the alkaline silica sol are 1:1.Adding ethanol can slow down self condensing for silanol in propyl trimethoxy silicane, most of silanol is set to participate in the modified-reaction to alkaline silica sol, but amount of alcohol is excessive and is unfavorable for modified-reaction, thus the mass ratio of silica in ethanol and alkaline silica sol is controlled 1:1.
Preferably, the addition of the propyl trimethoxy silicane accounts for the 4 ~ 6% of the alkaline silica sol solid content.The consumption of propyl trimethoxy silicane must can just have good modified effect enough.If consumption is not enough, can cause that the silicone hydroxyl of alkaline silica sol particle surface is modified incomplete；If consumption is excessive, unnecessary propyl trimethoxy silicane it may happen that some side reactions and make particle aggregation or crosslinking.
Above content is to combine the further description that specific preferred embodiment is made to the present invention, it is impossible to assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, the other embodiment drawn in the case where technical scheme is not departed from should be included within the scope of the present invention.
Claims (7)
1. the protection film composition of modified silicasol emulsion is based on, it is characterised in that：It is obtained by the raw material of following mass fraction：Aliphatic Polyester Aqueous Polyurethane Dispersions 60 ~ 80%, modified silicasol 5 ~ 10%, titanium dioxide 2 ~ 5%, mica 3 ~ 5%, aqueous silicone oil 1 ~ 3%, neopelex 0.1 ~ 0.5%, alkali soluble is swollen acrylic thickener 0.5 ~ 1%, polyether-modified dimethyl siloxane 0.3 ~ 0.6%, acrylic acid copolymer sodium salt 0.1 ~ 0.5%, organic silicon modified by polyether 0.1 ~ 0.5%, balance of distilled water；The Aliphatic Polyester Aqueous Polyurethane Dispersions are obtained by the raw material of following quality proportioning：40 ~ 80 parts of IPDI, 25 ~ 40 parts of polypropylene glycol, 25 ~ 80 parts of polyethylene glycol, 3 ~ 10 parts of dihydromethyl propionic acid, 50 ~ 80 parts of butanone, 5 ~ 12 parts of diethylenetriamine, 3 ~ 9 parts of triethylamine, 1 ~ 3 part of dibutyl tin laurate, 40 ~ 80 parts of distilled water；The modified silicasol is obtained by the raw material of following quality proportioning：40 ~ 60 parts of alkaline silica sol, 30 ~ 50 parts of ethanol, 1 ~ 6 part of propyl trimethoxy silicane.
2. the protection film composition based on modified silicasol emulsion according to claim 1, it is characterised in that：The mol ratio of the isocyanate group-NCO and hydroxyl-OH is 2.6 ~ 4 in the raw material of the Aliphatic Polyester Aqueous Polyurethane Dispersions:1.
3. the protection film composition based on modified silicasol emulsion according to claim 1, it is characterised in that：The addition of the triethylamine and the dihydromethyl propionic acid equimolar amounts.
4. the protection film composition based on modified silicasol emulsion according to claim 1, it is characterised in that：The modified silicasol is 1 with the mass ratio of the Aliphatic Polyester Aqueous Polyurethane Dispersions:4.
5. the protection film composition based on modified silicasol emulsion according to claim 1, it is characterised in that：The addition of the acrylic acid copolymer sodium salt is the 2 ~ 4% of the titanium dioxide and mica total amount.
6. the protection film composition based on modified silicasol emulsion according to any one in claim 1 ~ 5, it is characterised in that：The solid content of the ethanol is 1 with the mass ratio of the solid content of the alkaline silica sol:1.
7. the protection film composition based on modified silicasol emulsion according to claim 6, it is characterised in that：The addition of the propyl trimethoxy silicane accounts for the 4 ~ 6% of the alkaline silica sol solid content.
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| CN201510891911.2A CN106811078A (en) | 2015-11-27 | 2015-11-27 | Protection film composition based on modified silicasol emulsion |
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| CN201510891911.2A CN106811078A (en) | 2015-11-27 | 2015-11-27 | Protection film composition based on modified silicasol emulsion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262089A (en) * | 2022-08-06 | 2022-11-01 | 安徽东锦服饰有限公司 | Production process of waterproof and moisture permeable composite fabric |
| CN115477895A (en) * | 2022-09-24 | 2022-12-16 | 依工特种材料（苏州）有限公司 | Multi-curing conformal coating and preparation method thereof |
| CN117683463A (en) * | 2023-12-27 | 2024-03-12 | 深圳市希顺有机硅科技有限公司 | Environment-friendly weather-resistant silicone rubber coating and preparation method thereof |
-
2015
- 2015-11-27 CN CN201510891911.2A patent/CN106811078A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262089A (en) * | 2022-08-06 | 2022-11-01 | 安徽东锦服饰有限公司 | Production process of waterproof and moisture permeable composite fabric |
| CN115477895A (en) * | 2022-09-24 | 2022-12-16 | 依工特种材料（苏州）有限公司 | Multi-curing conformal coating and preparation method thereof |
| CN117683463A (en) * | 2023-12-27 | 2024-03-12 | 深圳市希顺有机硅科技有限公司 | Environment-friendly weather-resistant silicone rubber coating and preparation method thereof |
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