CN108797095B - Preparation method and application of multifunctional coating finishing agent - Google Patents

Preparation method and application of multifunctional coating finishing agent Download PDF

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CN108797095B
CN108797095B CN201810704636.2A CN201810704636A CN108797095B CN 108797095 B CN108797095 B CN 108797095B CN 201810704636 A CN201810704636 A CN 201810704636A CN 108797095 B CN108797095 B CN 108797095B
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stirring
preparing
agent
multifunctional coating
resin
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CN108797095A (en
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张丹
郑创
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Shanghai Miaohang Packaging Technology Co.,Ltd.
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Jiangnan University
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    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
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    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
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    • C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
    • C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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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
    • C09D5/08—Anti-corrosive paints
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract

The invention discloses a preparation method and application of a multifunctional coating finishing agent, which is characterized by comprising the following steps: comprises preparing nanometer titanium dioxide dispersion; preparing modified PC resin; preparing modified PMMA resin; preparing a multifunctional coating finishing agent: mixing the modified PC resin and the modified PMMA resin, adding the nano titanium dioxide dispersion liquid, adding 8-12 g of dispersing agent, heating, adding 0.8-1.2 g of accelerator and 2-4 g of curing agent, stirring for reaction, cooling, adding 5-10 g of silane coupling agent, adding 4-6 g of adhesive, cooling after reaction, adding 4-6 g of dispersing agent again, and reacting to obtain the multifunctional coating finishing agent. The invention has good light transmission and impact resistance, has particularly remarkable application effect on substrates of glass, plastic and the like, can form a hard film after glass coating, not only retains high light transmission, but also can increase the surface strength of the substrate.

Description

Preparation method and application of multifunctional coating finishing agent
Technical Field
The invention belongs to the technical field of finishing agents, and particularly relates to a preparation method and application of a multifunctional coating finishing agent.
Background
The coating is a covering layer which is formed on the surface of a metal or nonmetal base body by a physical, chemical or other method and has a certain thickness, is different from the base body material and has certain strengthening, protecting or special functions, thereby achieving the purposes of protecting, insulating, decorating or endowing the base material with certain special properties. The coating process can be applied to substrates such as metal, fabric, plastic, glass and the like, is popular due to simple operation and obvious effect, can be used for various substrates, is a technology which develops rapidly in recent years, and is widely applied to various fields of national economy such as spinning, printing, papermaking, automobiles, composite boards, architectural coating and the like. The application of polymer materials in coating finishing agents is increasingly prominent in the field of materials.
The materials such as glass, ceramics and the like take silicate as a main component, the materials are hard and brittle, and the surfaces of the materials have certain polarity, so that the materials are subjected to coating finishing, the required coating finishing agent is required to have good flexibility, the key point is to solve the problem of good adhesion with a substrate, and the materials also need high light transmittance and excellent toughness for air damper window glass for buildings, automobiles and the like, so that the strength of the surface of the substrate is improved.
The most common polymer coating finishing agents in the market at present are Polyurethanes (PU) and polyvinyl chloride (PVC). The PU coating mainly endows the substrate with the performances of water resistance, air permeability and the like, is soft and elastic, has good strength, can be used for a very thin coating, and has good moisture permeability and air permeability, wear resistance and dry cleaning resistance due to the porosity of the coating. But the defects are that the cost is higher, the weather resistance is poor, the product stability is poor, and the product is easy to hydrolyze by water, heat and alkali. The PVC coating has relatively low cost and certain resistance to acid and alkali, but has poor air permeability and slightly hard hand feeling, and Vinyl Chloride (VCM) used for polymerizing PVC has toxicity and carcinogenic effect, and the VCM content is generally regulated to be below 1PPM to meet the standard. Therefore, it is necessary to develop a new multifunctional green composite material polymer coating finishing agent.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned technical drawbacks.
Accordingly, as one aspect of the present invention, the present invention overcomes the deficiencies of the prior art and provides a method for preparing a multifunctional coating finish.
In order to solve the technical problems, the invention provides the following technical scheme: a preparation method of a multifunctional coating finishing agent comprises the following steps,
preparing nano titanium dioxide dispersion liquid, namely adding 40-60 g of nano titanium dioxide particles into 1L g of water, adding 0.5-2 g of dispersing agent 5040 and 1-3 g of wetting agent PE-100, performing ultrasonic dispersion, and stirring to obtain nano titanium dioxide dispersion liquid;
preparing modified PC resin, namely dissolving 40-60 g of PC resin in 300m of L g of chloroform, adding 8-12 g of chlorosulfonic acid, heating, stirring, adding 0.2-0.3 g of sodium borohydride, and stirring for reaction;
preparing modified PMMA resin, namely dissolving 40-60 g of PMMA resin in 300m of L chloroform, adding 4-6 g of vinylpyridine and 12-16 g of ethylene glycol, heating, stirring for 1 hour, adding 0.1-0.3 g of potassium persulfate, and stirring for reaction;
preparing a multifunctional coating finishing agent: mixing the modified PC resin and the modified PMMA resin, adding the nano titanium dioxide dispersion liquid, adding 8-12 g of dispersing agent, heating, adding 0.8-1.2 g of accelerator and 2-4 g of curing agent, stirring for reaction, cooling, adding 5-10 g of silane coupling agent, adding 4-6 g of adhesive, cooling after reaction, adding 4-6 g of dispersing agent again, and reacting to obtain the multifunctional coating finishing agent.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the preparation method of the nano titanium dioxide dispersion liquid comprises the following steps of preparing 50g of nano titanium dioxide particles, 1g of dispersing agent 5040 and 2g of wetting agent PE-100.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the preparation method comprises the following steps of preparing the nano titanium dioxide dispersion liquid, wherein ultrasonic dispersion is carried out for 2.5 hours, and stirring is carried out for 6 hours at a high speed at normal temperature.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the modified PC resin is prepared, wherein the content of the PC resin is 40g, the content of chlorosulfonic acid is 8g, and the content of sodium borohydride is 0.2 g; heating and stirring, namely heating to 45 ℃, wherein the stirring time is 30 min; the stirring reaction lasts for 2 h.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the preparation method of the modified PMMA resin comprises the following steps of preparing a PMMA resin, wherein the content of the PMMA resin is 60g, the content of vinylpyridine is 6g, the content of ethylene glycol is 16g, and the content of potassium persulfate is 0.3 g.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the preparation method of the modified PMMA resin comprises the following steps of heating to 65 ℃, and stirring for reaction for 2.5 hours.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: the preparation method of the multifunctional coating finishing agent comprises the steps of adding 8-12 g of dispersing agent, heating, wherein the dispersing agent is 5g of sodium dodecyl sulfate and 5g of PEG, and heating to 90 ℃.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: adding 0.8-1.2 g of accelerator and 2-4 g of curing agent, stirring, reacting and cooling, wherein the accelerator is 0.5g of DMP-30 and 0.5g of triethylene diamine, the curing agent is 1.5g of isocyanate and 1.5g of hexahydrophthalic anhydride, stirring, reacting and cooling, the reaction time is 6 hours, and cooling to room temperature.
As a preferred scheme of the preparation method of the multifunctional coating finishing agent, the preparation method comprises the following steps: adding 5-10 g of silane coupling agent, adding 4-6 g of adhesive, reacting and cooling, wherein the silane coupling agent is compounded by 2.5g of KH570, 2.5g of HDTMS and 2.5g of MTMS, and the adhesive is 5g of PVA; cooling after the reaction, wherein the reaction time is 1 h; and adding 4-6 g of dispersing agent again, wherein the dispersing agent is 2.5g of sodium dodecyl sulfate and 2.5g of PEG, and the reaction time is 1.5 h.
As another aspect of the present invention, the present invention overcomes the disadvantages of the prior art and provides the use of the multifunctional coating finishing agent in the surface treatment of glass, fabric, metal and plastic.
In order to solve the technical problems, the invention provides the following technical scheme: the multifunctional coating finishing agent is applied to the surface treatment of glass, fabric, metal and plastic.
The invention has the beneficial effects that: the preparation of the invention is used for blending modification of high polymer materials, sulfonic group with strong water solubility is introduced into PC, sodium sulfonate can be used as a good solubilizing group during blending, vinyl pyridine and ethylene glycol are added into PMMA, and a group capable of forming hydrogen bonds or ionic groups is introduced into a high polymer chain, so that two high polymer materials form a compatible system.
The raw materials used in the invention are compatible and synergistic to each other, and jointly form a product with excellent performance. The compound coating finishing agent is simple and convenient to use, can be used for attaching a product to the surface of a base material in simple ways such as brushing, spraying and dipping, and forms a protective coating after drying.
The invention has active functional groups such as hydroxyl, carboxyl, ester group and the like, greatly enhances the binding force between the coating and the base material, and also enhances the adhesive force of the coating.
The invention has good light transmission and impact resistance, has particularly remarkable application effect on substrates of glass, plastic and the like, can form a hard film after glass coating, not only retains high light transmission, but also can increase the surface strength of the substrate. Meanwhile, the glass has excellent ultraviolet resistance due to the existence of the nano titanium dioxide dispersion liquid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a graph showing the effect of the coating finish of example 1 of the present invention as a coating on a metal surface, wherein the left graph is a graph of an untreated general iron block and the right graph is a graph of a coating treated according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with examples are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The preparation method comprises the following steps:
adding 40-60 g of nano titanium dioxide particles into 1L g of water, adding 0.5-2 g of dispersing agent 5040 and 1-3 g of wetting agent PE-100, ultrasonically dispersing for 2.5h, and stirring at high speed for 6h at normal temperature to prepare nano titanium dioxide aqueous dispersion;
dissolving 40-60 g of PC resin in 300m of L g of chloroform, and adding 8-12 g of ClSO2OH, heating to 45 ℃, stirring for 30min, and then adding 0.2-0.3 g of NaBH4Continuously stirring for 2 hours;
dissolving 40-60 g of PMMA resin in 300m of L chloroform, adding 4-6 g of vinylpyridine and 12-16 g of ethylene glycol, heating to 65 ℃, stirring for 1 hour, adding 0.1-0.3 g of potassium persulfate, and continuing stirring for 2.5 hours;
after stirring, the modified PC resin and the modified PMMA resin are cooled to room temperature by the aid of the tiger and are mixed in a three-necked bottle;
adding the nanometer titanium dioxide dispersion into a three-neck bottle, and stirring for 20 min;
adding 8-12 g of dispersing agent sodium dodecyl sulfate and PEG. Slowly heating while stirring, and setting an oil bath pan at 90 ℃;
when the temperature reaches 90 ℃, adding 0.8-1.2 g of accelerator DMP-30, triethylene diamine, 2-4 g of curing agent isocyanate and hexahydrophthalic anhydride, and stirring for 6 hours;
and cooling to 30 ℃, mixing 5-10 g of three silane coupling agents KH570, HDTMS and MTMS, and adding into a three-mouth bottle. Stirring for 2 hours;
adding 4-6 g of PVA as a binder, and stirring for 1 h;
and cooling the reaction liquid, adding 4-6 g of dispersing agent sodium dodecyl sulfate and PEG, and stirring at normal temperature for 1.5h to obtain the composite polymer material PC-PMMA coating finishing agent.
Example 1:
adding 50g of nano titanium dioxide particles into 1L g of water, adding 1g of dispersing agent 5040 and 2g of wetting agent PE-100, ultrasonically dispersing for 2.5h, and stirring at high speed for 6h at normal temperature to obtain nano titanium dioxide dispersion liquid;
40g of PC resin was dissolved in 300m L of chloroform, and 8g of ClSO was added2OH, heating to 45 ℃, stirring for 30min, and then adding 0.2g NaBH4Continuously stirring for 2 hours;
dissolving 60g of PMMA resin in 300m of L chloroform, adding 6g of vinylpyridine and 16g of ethylene glycol, heating to 65 ℃, stirring for 1h, adding 0.3g of potassium persulfate, and continuing stirring for 2.5 h;
after stirring, the modified PC resin and the modified PMMA resin are cooled to room temperature by the aid of the tiger and are mixed in a three-necked bottle;
adding the nano titanium dioxide dispersion liquid into a three-necked bottle, and stirring for 20 min;
adding 5g of sodium dodecyl sulfate and 5g of PEG as dispersing agents, slowly heating while stirring, and setting an oil bath kettle at 90 ℃;
when the temperature reaches 90 ℃, adding 0.5g of DMP-30 and 0.5g of triethylene diamine as accelerators, simultaneously adding 1.5g of isocyanate and 1.5g of hexahydrophthalic anhydride as curing agents, and stirring for 6 hours;
the temperature was reduced to 30 ℃ and the three silane coupling agents, 2.5g KH570, 2.5g HDTMS, 2.5g MTMS, were mixed and added to a three-necked flask. Stirring for 2 hours;
adding 5g of adhesive PVA, and stirring for 1 h;
and cooling the reaction liquid, adding 2.5g of sodium dodecyl sulfate and 2.5g of PEG as dispersing agents, and stirring at normal temperature for 1.5h to obtain the PC-PMMA coating finishing agent of the composite high polymer material.
The invention uses vinylpyridine and sodium borohydride (NaBH)4) Chlorosulfonic acid (ClSO)2OH), glycol and potassium persulfate are taken as modification aids, PEG, sodium dodecyl sulfate and a dispersing agent 5040 are taken as dispersing agents, PE-100 is taken as a wetting agent, DMP-30 and triethylene diamine are taken as accelerators, KH570, HDTMS and MTMS are taken as silane coupling agents, polyvinyl alcohol (PVA) is taken as an adhesive, and isocyanate and hexahydrophthalic anhydride are taken as curing agents4) Chlorosulfonic acid is added in the presence of (2) to introduce sulfonic acid groups into the aliphatic PC. Sulfonic acid group (-SO)3H) Sodium sulfonate (NaSO)3) The PC resin has strong water solubility, greatly enhances the water solubility of the PC resin and the compatibility with other macromolecules, and is convenient for uniform dispersion during blending; the ethylene glycol and vinyl pyridine added into PMMA are complex solubilizer, hydrophilic groups such as hydroxyl and the like, reduce the interfacial energy of the phase interface of the blend, promote the dispersion of the phases, refine and uniformly distribute dispersed phase particles, prevent the coagulation of the dispersed phases, strengthen the bonding between the phases and promote the blend which is thermodynamically incompatible to be process compatibleA blend of (A) and (B). The nano titanium dioxide aqueous dispersion is prepared, nano particles are uniformly dispersed in water by adding the auxiliary agent, and the addition of the titanium dioxide nano particles has a strong ultraviolet shielding effect on a coating and also has certain toughening, reinforcing, anti-fouling and self-cleaning effects on the coating. The light transmittance of the finishing agent prepared by the invention can reach 95%, the effect of the combined use and compounding of the dispersing agent is obviously better than that of the use of a single component with the same dosage, and a uniform system can be formed in a short time by the compounding use; the accelerator and the curing agent are used together, wherein the amount of the accelerator is less, and the accelerator is used as the auxiliary of the curing agent for reinforcing the resin, so that the hardness of a product is improved, and the adhesion between the two resins is improved. The aliphatic amine accelerant DMP-30 and triethylene diamine have good matching performance and are not mutually resistant, and the aliphatic amine accelerant has the functions of aging resistance and plasticization during compounding and has better using effect than a single accelerant.
Example 2:
adding 50g of nano titanium dioxide particles into 1L g of water, adding 2g of dispersing agent 5040 and 3g of wetting agent PE-100, ultrasonically dispersing for 2.5h, and stirring at high speed for 6h at normal temperature to obtain nano titanium dioxide dispersion liquid;
60g of PC resin was dissolved in 300m L of chloroform, and 12g of ClSO was added2OH, heating to 45 ℃, stirring for 30min, and then adding 0.3g of NaBH4Continuously stirring for 2 hours;
dissolving 40g of PMMA resin in 300m of L chloroform, adding 4g of vinylpyridine and 12g of ethylene glycol, heating to 65 ℃, stirring for 1 hour, adding 0.1g of potassium persulfate, and continuing stirring for 2.5 hours;
after stirring, the modified PC resin and the modified PMMA resin are cooled to room temperature by the aid of the tiger and are mixed in a three-necked bottle;
adding the nano titanium dioxide dispersion liquid into a three-necked bottle, and stirring for 20 min;
10g of dispersant sodium dodecyl sulphate was added. Slowly heating while stirring, and setting an oil bath pan at 90 ℃;
adding 1g of accelerator DMP-30 and 3g of curing agent isocyanate when the temperature reaches 90 ℃, and stirring for 6 hours;
and cooling to 30 ℃, mixing the silane coupling agents HDTMS and MTMS, and adding into a three-mouth bottle. Stirring for 2 hours;
adding 5g of adhesive PVA, and stirring for 1 h;
and cooling the reaction liquid, adding 5g of dispersant sodium dodecyl sulfate, and stirring at normal temperature for 1.5h to obtain the composite polymer material PC-PMMA coating finishing agent.
Example 3:
the PC-PMMA coating finishing agent of the embodiment 1 is used as a glass surface coating, and compared with a single-component PC coating, a PMMA coating and a common PVC coating, the light transmittance and the ultraviolet light transmittance of the glass treated by the coatings are detected and shown in Table 1.
TABLE 1
Light transmittance% Ultraviolet light transmittance%
PC 82 18
PMMA 85 21
PVC 78 23
The PC-PMMA of the invention 95 6
The light transmittance is measured by a method for measuring the light transmittance of daily glass in the national standard GB/T5433-2008.
Example 4:
the PC-PMMA coating finishing agent of the embodiment 1 of the invention is used as a transparent plastic surface coating, a hard film is formed after thermosetting, compared with a single-component PC coating, a PMMA coating, a common PVC coating and a PU coating, and the hardness, the impact strength and the like of a plastic base material are tested and shown in Table 2.
TABLE 2
hardness/HD Impact strength KJ/m2
PC 81 16.23
PMMA 84 1.35
PVC 74 9.21
PU 65 5.38
The PC-PMMA of the invention 90 25.62
The hardness of the plastic was measured by the method of GB/T2411-2008 for plastic and hard rubber using a durometer hardness tester.
The impact strength of the plastics was determined according to GB/T1843-2008 plastic Izod impact strength.
Example 5:
the PC-PMMA coating finishing agent of the embodiment 1 of the invention is used as a fabric coating, a roller coating method is adopted to finish the coating of the non-woven fabric, the coating is compared with a Polyacrylate (PA) coating agent, a PU coating agent and a PVC coating agent, the appearance and the hand feeling of the fabric are observed, and the mechanical property, the wear resistance, the flame retardance (limited oxygen index), the ultraviolet resistance and other properties of the fabric are tested as shown in Table 3.
TABLE 3
Figure BDA0001715161150000081
The tensile breaking strength of the fabric is determined according to the determination test method of the tensile property, breaking strength and breaking elongation of the fabric in GB/T3923.1-1997.
The tear strength of the fabric was determined according to the test method specified in GB 3917.1-97.
The abrasion resistance of the fabric is measured according to the method for measuring the abrasion resistance of the fabric of GB/T21196.1-2007 Martindall. The fabric limiting oxygen index is carried out according to the GB/T5454-1997 textile flammability test oxygen index method. The fabric UV transmittance was measured according to GB/T17032-1997 test method for the UV transmittance of textile fabrics.
Example 6:
the PC-PMMA coating finishing agent is used as a metal surface coating, an iron workpiece is subjected to coating treatment in a dipping mode, a transparent film is formed after thermosetting, the appearance of metal is observed, the surface hand feeling is felt, and an iron bar treated by the PC-PMMA coating finishing agent can feel smooth, fine and non-sticky in hand feeling and bright in appearance as shown in figure 1 (the left figure is an untreated common iron block, and the right figure is treated by the coating of the invention). In addition, it has been found that this film after the coating finish has an anticorrosive effect.
In conclusion, the PC is a high polymer with a high refractive index, and the carbonate group and other groups in the molecule are alternately arranged, so that the PC is a tough thermoplastic resin, has excellent properties such as high strength, fatigue resistance and solvent resistance, can have high transparency and free dyeing property when used as a coating, but has poor wear resistance and impact resistance, the PMMA is an acrylate polymer, commonly called organic glass, and has obvious moisture absorption due to the polar side methyl, the PMMA resin is a non-toxic environment-friendly material, the mechanical strength is high, the tensile resistance and the impact resistance are 7-18 times higher than those of common glass, and the chemical stability is good. But it is brittle, has low surface hardness, is easy to brush and scratch and loses luster. The invention compounds two macromolecules, overcomes the difficulty of poor compatibility of the two macromolecules through modification treatment, and adds auxiliary agents such as adhesive, accelerant, curing agent and the like to prepare the composite macromolecule coating finishing agent which can be used for surface treatment of glass, fabric, metal, plastic and the like, thereby endowing a substrate with various functional characteristics. The preparation method is simple in preparation process, stable in product, remarkable in effect, wide in application, safe, non-toxic, green and environment-friendly.
According to the invention, because the refractive indexes of the two high polymer materials are greatly different, the coating finishing agent PC-PMMA with high light transmission, good chemical corrosion resistance and aging resistance is obtained according to different proportions of the two materials. The preparation method is simple in preparation process, stable in product, remarkable in effect, wide in application, safe, non-toxic, green and environment-friendly.
The preparation of the invention is used for blending modification of high polymer materials, sulfonic group with strong water solubility is introduced into PC, sodium sulfonate can be used as a good solubilizing group during blending, vinyl pyridine and ethylene glycol are added into PMMA, and a group capable of forming hydrogen bonds or ionic groups is introduced into a high polymer chain, so that two high polymer materials form a compatible system.
The raw materials used in the invention are compatible and synergistic to each other, and jointly form a product with excellent performance. The compound coating finishing agent is simple and convenient to use, can be used for attaching a product to the surface of a base material in simple ways such as brushing, spraying and dipping, and forms a protective coating after drying.
The invention has active functional groups such as hydroxyl, carboxyl, ester group and the like, greatly enhances the binding force between the coating and the base material, and also enhances the adhesive force of the coating.
The invention has good light transmission and impact resistance, has particularly remarkable application effect on substrates of glass, plastic and the like, can form a hard film after glass coating, not only retains high light transmission, but also can increase the surface strength of the substrate. Meanwhile, the glass has excellent ultraviolet resistance due to the existence of the nano titanium dioxide dispersion liquid.
When the polymer coating finishing agent provided by the invention is used for coating on a metal base material, the process is simpler and more environment-friendly than the treatment methods such as electroplating, chemical plating and the like, and the finishing agent can be repeatedly brushed or dipped, so that the surface of the base material has high hardness and high adhesive force, and has good optical performance and visual effect.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. A preparation method of a multifunctional coating finishing agent is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
preparing nano titanium dioxide dispersion liquid, namely adding 40-60 g of nano titanium dioxide particles into 1L g of water, adding 0.5-2 g of dispersing agent 5040 and 1-3 g of wetting agent PE-100, performing ultrasonic dispersion, and stirring to obtain nano titanium dioxide dispersion liquid;
preparing modified PC resin, namely dissolving 40-60 g of PC resin in 300m of L g of chloroform, adding 8-12 g of chlorosulfonic acid, heating, stirring, adding 0.2-0.3 g of sodium borohydride, and stirring for reaction;
preparing modified PMMA resin, namely dissolving 40-60 g of PMMA resin in 300m of L chloroform, adding 4-6 g of vinylpyridine and 12-16 g of ethylene glycol, heating, stirring for 1 hour, adding 0.1-0.3 g of potassium persulfate, and stirring for reaction;
preparing a multifunctional coating finishing agent: mixing the modified PC resin and the modified PMMA resin, adding the nano titanium dioxide dispersion liquid, adding 8-12 g of dispersing agent, heating, adding 0.8-1.2 g of accelerator and 2-4 g of curing agent, stirring for reaction, cooling, adding 5-10 g of silane coupling agent, adding 4-6 g of adhesive, cooling after reaction, adding 4-6 g of dispersing agent again, and reacting to obtain the multifunctional coating finishing agent.
2. The method of preparing the multifunctional coating finish of claim 1, wherein: the preparation method of the nano titanium dioxide dispersion liquid comprises the following steps of preparing 50g of nano titanium dioxide particles, 1g of dispersing agent 5040 and 2g of wetting agent PE-100.
3. The method for preparing the multifunctional coating finishing agent according to claim 1 or 2, characterized in that: the preparation method comprises the following steps of preparing the nano titanium dioxide dispersion liquid, wherein ultrasonic dispersion is carried out for 2.5 hours, and stirring is carried out for 6 hours at a high speed at normal temperature.
4. The method for preparing the multifunctional coating finishing agent according to claim 1 or 2, characterized in that: the modified PC resin is prepared, wherein the content of the PC resin is 40g, the content of chlorosulfonic acid is 8g, and the content of sodium borohydride is 0.2 g; heating and stirring, namely heating to 45 ℃, wherein the stirring time is 30 min; the stirring reaction lasts for 2 h.
5. The method for preparing the multifunctional coating finishing agent according to claim 1 or 2, characterized in that: the preparation method of the modified PMMA resin comprises the following steps of preparing a PMMA resin, wherein the content of the PMMA resin is 60g, the content of vinylpyridine is 6g, the content of ethylene glycol is 16g, and the content of potassium persulfate is 0.3 g.
6. The method of preparing the multifunctional coating finish of claim 5, wherein: the preparation method of the modified PMMA resin comprises the following steps of heating to 65 ℃, and stirring for reaction for 2.5 hours.
7. The method of preparing the multifunctional coating finish of any one of claims 1, 2 or 6, wherein: the preparation method of the multifunctional coating finishing agent comprises the steps of adding 8-12 g of dispersing agent, heating, wherein the dispersing agent is 5g of sodium dodecyl sulfate and 5g of PEG, and heating to 90 ℃.
8. The method of preparing the multifunctional coating finish of claim 7, wherein: adding 0.8-1.2 g of accelerator and 2-4 g of curing agent, stirring, reacting and cooling, wherein the accelerator is 0.5g of DMP-30 and 0.5g of triethylene diamine, the curing agent is 1.5g of isocyanate and 1.5g of hexahydrophthalic anhydride, stirring, reacting and cooling, the reaction time is 6 hours, and cooling to room temperature.
9. The method of preparing the multifunctional coating finish of claim 8, wherein: adding 5-10 g of silane coupling agent, adding 4-6 g of adhesive, reacting and cooling, wherein the silane coupling agent is compounded by 2.5gKH570, 2.5g of HDTMS and 2.5g of MTMS, and the adhesive is 5g of PVA; cooling after the reaction, wherein the reaction time is 1 h; and adding 4-6 g of dispersing agent again, wherein the dispersing agent is 2.5g of sodium dodecyl sulfate and 2.5g of PEG, and the reaction time is 1.5 h.
10. The use of the multifunctional coating finishing agent prepared by the method of any one of claims 1 to 9 in the surface treatment of glass, fabric, metal and plastic.
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Citations (3)

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Publication number Priority date Publication date Assignee Title
KR20120122825A (en) * 2011-04-30 2012-11-07 (주)글로벌첼린지 Preparation of organic/inorganic coating solution with ultra high molecular weight polyethylene fabric
CN104927311A (en) * 2015-06-26 2015-09-23 浙江海洋学院 Portable fuel oil storing and transporting bag
CN107141439A (en) * 2017-06-05 2017-09-08 武汉理工大学 A kind of antimicrobial form castor oil-base cation aqueous polyurethane emulsion and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120122825A (en) * 2011-04-30 2012-11-07 (주)글로벌첼린지 Preparation of organic/inorganic coating solution with ultra high molecular weight polyethylene fabric
CN104927311A (en) * 2015-06-26 2015-09-23 浙江海洋学院 Portable fuel oil storing and transporting bag
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