CN108912941B

CN108912941B - coating composition for 3D glass decoration, 3D glass and preparation method thereof

Info

Publication number: CN108912941B
Application number: CN201710173530.XA
Authority: CN
Inventors: 崔静娜; 罗文海
Original assignee: BYD Co Ltd
Current assignee: Shantou BYD Electronics Co Ltd
Priority date: 2017-03-22
Filing date: 2017-03-22
Publication date: 2019-12-10
Anticipated expiration: 2037-03-22
Also published as: CN108912941A

Abstract

The invention discloses a coating composition for decorating 3D glass, the 3D glass and a preparation method thereof. The coating composition comprises, based on 100% of its total weight: 40-80 wt% of thermosetting modified epoxy resin, 10-30 wt% of epoxy curing agent, 5-20 wt% of polyester acrylate, 1-5 wt% of photoinitiator and 0.1-6 wt% of coupling agent; wherein the polyester acrylate has a tensile strength of not less than 800 psi. The present invention forms a decorative coating having a heat-resistant crosslinked network structure by using a thermosetting epoxy resin in a coating composition; meanwhile, a proper amount of polyester acrylate with the tensile strength not less than 800psi is used in a matching manner to form flexible connection points in the cross-linked network structure, so that the flexibility of the formed decorative coating is improved, and the method is suitable for a 3D glass forming process of firstly forming the decorative coating on the plane glass and then carrying out hot bending forming.

Description

Coating composition for 3D glass decoration, 3D glass and preparation method thereof

Technical Field

The invention relates to the field of 3D glass production, in particular to a coating composition for 3D glass decoration, 3D glass and a preparation method thereof.

Background

With the improvement of living standard, consumers have higher and higher requirements on the appearance of electronic products; the window effect of the electronic product can be improved, and the 3D glass which is clear and has strong perspective is more and more widely applied.

Because the 3D glass has the characteristic of inward recess, the surface decoration can not be carried out by using the traditional plane silk screen printing, and the surface decoration can only be carried out by adopting the modes of transfer printing or spraying and film pasting at present; however, when the surface decoration is performed by using the pad printing method, a special printing rubber head and equipment are required, so that the disadvantages of high equipment investment and high cost are caused; when the surface decoration is carried out by adopting the spraying and film pasting modes, because the tolerance exists in the preparation of the protective film, the jig used by the film pasting also has the tolerance, and the decoration precision is easy to deteriorate when various tolerances are added together.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a coating composition for decorating 3D glass, the 3D glass and a preparation method thereof, so that the equipment investment is reduced, and the precision and the aesthetic property of a decorative coating are improved.

in order to achieve the above object, the present invention provides a coating composition for glass decoration, comprising, based on 100% by weight of the total composition: 40-80 wt% of thermosetting modified epoxy resin, 10-30 wt% of epoxy curing agent, 5-20 wt% of polyester acrylate, 1-5 wt% of photoinitiator and 0.1-6 wt% of coupling agent; wherein the polyester acrylate has a tensile strength of not less than 800 psi.

Meanwhile, the invention also provides a preparation method of the 3D glass, which comprises the following steps: s1, weighing the components in the coating composition according to the invention in proportion, and stirring and mixing in a solvent to obtain a coating mixture; s2, covering the coating mixture on the surface of the plane glass to form a coating layer, and curing to form a decorative coating; and S3, putting the plane glass with the decorative coating formed on the surface obtained in the S2 into a 3D mould, and carrying out hot bending forming to obtain the 3D glass.

In addition, the invention also provides 3D glass prepared by the preparation method.

The coating composition for decorating 3D glass, the 3D glass and the preparation method thereof are applied, and the coating composition is used with thermosetting epoxy resin to form a decorative coating with a heat-resistant cross-linked network structure; meanwhile, a proper amount of polyester acrylate with the tensile strength not less than 800psi is used in a matching manner to form flexible connection points in the cross-linked network structure, so that the flexibility of the formed decorative coating is improved, the method is suitable for a 3D glass forming process of firstly forming the decorative coating on the plane glass and then carrying out hot bending forming, and the precision and the attractiveness of the decorative coating can be improved while the equipment investment is reduced.

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

Aiming at the current situations that the existing 3D glass surface decoration method is high in equipment investment, insufficient in precision and poor in appearance, the invention provides a coating composition for glass decoration, which comprises the following components in percentage by weight of 100 percent: 40-80 wt% of thermosetting modified epoxy resin, 10-30 wt% of epoxy curing agent, 5-20 wt% of polyester acrylate, 1-5 wt% of photoinitiator and 0.1-6 wt% of coupling agent; wherein the polyester acrylate has a tensile strength of not less than 800 psi.

The coating composition according to the present invention preferably comprises, based on 100% of its total weight: 48-75 wt% of thermosetting modified epoxy resin, 10-25 wt% of epoxy curing agent, 6-18 wt% of polyester acrylate, 1-4 wt% of photoinitiator and 0.5-5 wt% of coupling agent.

According to the coating composition, the thermosetting modified epoxy resin is obtained by modification, and the thermosetting modified epoxy resin has better heat resistance. In order to facilitate the thermosetting modified epoxy resin to form a cross-linked network structure under the promotion of the epoxy curing agent, the thermosetting modified epoxy resin is preferably phenolic aldehyde modified epoxy resin with the epoxy amount of 150-350eq/100g and/or organosilicon modified epoxy resin with the epoxy equivalent of 500-2000eq/100 g. The control of the epoxy equivalent of the thermosetting modified epoxy resin is beneficial to controlling the crosslinking degree of the thermosetting modified epoxy resin, and further the heat resistance and the flexibility of a crosslinking network structure formed by crosslinking the thermosetting modified epoxy resin are considered. Phenolic-modified epoxy resins that may be used in practice include, but are not limited to, DEN425 (epoxide equivalent weight 169-175eq/100g), DEN 431 (epoxide equivalent weight 172-179eq/100g), or DEN 439 (epoxide equivalent weight 191-210eq/100g) commercially available from DOW corporation; f-51 (epoxy equivalent: 185-200eq/100g), F-44-80 (epoxy equivalent: 312eq/100g), or F-44D (epoxy equivalent: 227eq/100g) commercially available from Sanmu group, Inc., Jiangsu; phenolic-modified epoxy resins may be used including, but not limited to, GR-5003 (epoxy equivalent of 800-1000eq/100g) commercially available from Glupont nanomaterial Co., Ltd, Dongguan.

The "tensile strength" of the polyester acrylates according to the coating compositions of the invention is measured with reference to ISO 527-2 test method for the tensile properties of plastics. Wherein a tougher coating is facilitated by controlling the "tensile strength" of the polyester acrylate. Preferably, the polyester acrylate has a tensile strength of not less than 1000psi, preferably not less than 2000psi, more preferably not less than 3000 psi. Polyester acrylates that may be used in the present invention include, but are not limited to, CN983NS (tensile strength of 8400psi), CN964 (tensile strength of 3300psi), CN968 (tensile strength of 11000psi), CN2261 (tensile strength of 10000psi), CN117 (tensile strength of 15235psi), CN120NS (tensile strength of 15556psi) commercially available from Sartomer, Guangzhou chemical Co., Ltd.

According to the coating composition of the present invention, preferably, the epoxy curing agent is one or more selected from dicyandiamide, organic acid anhydride, amino resin and polythiol compound.

Among them, organic acid anhydrides that can be used include, but are not limited to, aromatic acid anhydrides, alicyclic acid anhydrides, long chain aliphatic acid anhydrides, halogenated acid anhydrides, and acid anhydride adducts. The aromatic acid anhydrides include, but are not limited to, phthalic anhydride, trimellitic anhydride, pyromellitic dianhydride, and benzophenonetetracarboxylic dianhydride. The alicyclic anhydrides include, but are not limited to, maleic anhydride, elaeostearic anhydride, alkenyl succinic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride and methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, nadic anhydride, methyl nadic anhydride, glutaric anhydride, terpene anhydrides, methylcyclohexene tetracarboxylic dianhydride, and dodecenyl succinic anhydride. The long chain aliphatic anhydrides include, but are not limited to, polyazelaic anhydride, polysebacic anhydride, and the like. The halogen-containing anhydrides include, but are not limited to, tetrabromophthalic anhydride and tetrachlorophthalic anhydride. The anhydride adducts include, but are not limited to, trimellitic anhydride ethylene glycol, glycerol esters, diphenyl sulfone tetracarboxylic dianhydride, and the like. The acid anhydride curing agents may be classified into monofunctional type, bifunctional type and free acid anhydride type according to their functional groups. Commercially available products that may be used include, but are not limited to, SMS-01 (methyl tetrahydrophthalic anhydride), SMS-02, commercially available from Sanmu group, Jiangsu.

Amino resins that may be used herein include, but are not limited to, urea formaldehyde resins, melamine formaldehyde resins, and polyamide polyamine epichlorohydrin. Commercially available products that may be used include, but are not limited to, CYMEL 303, CYMEL 325, CYMEL 1123 commercially available from cyanotex, usa; YF-582, commercially available from Sync coating, Inc., Right, Tianjin; and SH-5718 of Shanghai mechanical crystallization chemical Co., Ltd.

commercially available products in which polythiol compounds can be used include, but are not limited to, Cacure 3-800, Cacure 3830-81, Cacure WR-6, commercially available from Corning; EPomateqx-40, EPomate qx-io, commercially available from Toray corporation of Japan.

According to the coating composition of the present invention, the photoinitiator is a photoinitiator capable of being used with polyester acrylate, preferably the photoinitiator is selected from one or more of MBF, 651, 907, 1173, 184, 369, TPO, 819, 2100, 784, commercially available from Ciba company.

According to the coating composition of the present invention, preferably, the coupling agent is one or more selected from the group consisting of a silane coupling agent, a titanate coupling agent, and a zirconium-based coupling agent. Among the silane coupling agents that may be used are, but not limited to, KH-540, KH-550, KH-560, KH-570, KH-792, Si-602, Si-563, A-151, commercially available from Kyowa Kagaku K.K. Titanate coupling agents that may be used therein include, but are not limited to, isopropyldioleate acyloxy (dioctylphosphonoxy) titanate (titanate coupling agent TMC-101), monoalkoxy unsaturated fatty acid titanate (titanate coupling agent TMC-105), and the chelate of bis (dioctyloxypyrophosphate) ethylene titanate and triethanolamine (titanate coupling agent TMC-311 w). Zirconium-based coupling agents that may be used herein include, but are not limited to, Cavco Mod from Cavedon chemical, USA.

According to the preparation method of the present invention, there may be no particular requirement for the method of mixing the components in S1, however, in order to improve the uniformity of mixing between the components, it is preferable that the step of stirring and mixing S1 in the solvent comprises: s11, under the first mixing condition, adding epoxy resin, polyester acrylate and a coupling agent into a solvent, stirring and mixing to obtain a primary mixture; s12, adding an epoxy curing agent and a photoinitiator into the primary mixture under a second mixing condition, and mixing to obtain the coating mixture;

The production method according to the present invention, wherein there may be no particular requirement for the first mixing condition and the second mixing condition, may be a mixing condition conventionally used for uniformly mixing raw materials. Preferably, the first mixing conditions include: stirring at 1000-3000rpm for 10-30 min; the second mixing conditions include: stirring at 1000-3000rpm for 10-30 min;

The preparation method according to the present invention, wherein the amount of the solvent may be used without particular requirement, however, in order to facilitate the dissolution and dispersion between the components and the application of the coating mixture, it is preferable that the amount of the solvent is 5 to 25% by weight based on the total weight of the coating composition.

According to the preparation method of the present invention, in order to facilitate the dissolution and dispersion of the components in the coating composition, it is preferable that one or more diluents are included in the solvent; wherein when the solvent is a mixture of several diluents, the method further comprises the step of premixing the diluents to form a mixture solvent in S11. Premixing the various diluents advantageously facilitates better dissolution and dispersion of the components of the coating composition.

the diluent used in the production method of the present invention is not particularly limited, and may be appropriately selected according to the component to be dissolved, and examples thereof include aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), alicyclic hydrocarbons (e.g., cyclohexane, cyclohexanone, tolucyclohexanone, etc.), alcohols (e.g., methanol, ethanol, isopropanol, etc.), ethers (e.g., diethyl ether, propylene oxide, etc.), esters (e.g., methyl acetate, ethyl acetate, propyl acetate, etc.), ketones (e.g., acetone, methyl butanone, methyl isobutyl ketone, etc.), and glycol derivatives (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, etc.).

According to the preparation method of the invention, the thickness of the decorative coating in the S2 can be not required, and the conventional thickness of the glass decorative coating in the field can be referred. Preferably, the decorative coating in S2 has a thickness of 5 to 20 μm. The coating layer may be formed in any manner capable of covering the surface of the flat glass, such as spraying, brushing, screen printing, etc., and it is preferable in the present invention that the coating layer is formed by a screen printing method.

According to the preparation method of the present invention, preferably, the curing step in S2 includes: (1) precuring the coating layer under the heating and curing condition to form a precured coating; (2) and curing the coating layer under the ultraviolet curing condition to form the decorative coating.

According to the preparation method of the invention, the heating curing conditions preferably comprise heating treatment at 150-180 ℃ for 60-90min, and the ultraviolet curing conditions comprise ultraviolet intensity of 1500-2500mJ/cm ² and irradiation time of 10-60 s.

According to the preparation method of the present invention, there is no special requirement for the 3D mold used in S3, as long as the mold conventionally used in the art is used, generally, the 3D mold includes a female mold and a male mold, the female mold is a mold with a groove structure (or a planar structure) formed therein, the male mold is a mold with a protrusion structure formed therein, the groove structure of the female mold is matched with the protrusion structure of the male mold, and/or the surface depression structure of the 3D glass to be prepared is matched with the protrusion structure of the male mold. Preferably, in the step of loading the flat glass having the decorative coating formed on the surface thereof obtained in S2 into the 3D mold, the convex structure of the convex mold facing the side of the flat glass having the decorative coating formed thereon is loaded into the 3D mold, and the decorative coating is formed on the side of the 3D glass having the concave structure therein, thus prepared.

According to the preparation method of the present invention, preferably, the forming conditions of the hot-bending forming in S3 include: the heating temperature is 550-650 ℃, and the heating time is 25-50 min.

meanwhile, the invention also provides 3D glass prepared by the preparation method. The decorative coating in the 3D glass has relatively good adhesive force, clear boundary, basically smooth surface without unevenness, and relatively good temperature resistance, humidity resistance, salt mist resistance and thermal shock resistance.

the present invention will be described in detail below by way of examples.

Examples 1 to 4

(1) Coating composition for 3D glass decoration: the components and component contents are shown in table 1.

(2) Preparation of 3D glass:

S1, preparing a coating mixture:

Stirring a diluent (raw materials and the using amount of the diluent are shown in the table 1) in a high-speed dispersion machine at the rotating speed of 500rpm for 5min, then adding thermosetting modified epoxy resin, polyester acrylate and a coupling agent, and stirring for 15min at the rotating speed of 1500rpm by using the high-speed dispersion machine; then adding an epoxy curing agent and a photoinitiator, and stirring for 15min at the rotating speed of 1500rpm by using a high-speed dispersion machine to obtain a coating composition;

S2, cutting plane glass (purchased from Corning company) into glass substrates with the length, width and thickness of 100mm multiplied by 70mm multiplied by 7.5mm, printing the coating composition on one side surface of the glass substrate by a screen printing method, leveling for 5min at room temperature to form a covering surface, and carrying out pre-curing treatment under the heating curing condition (shown in the table 1) and then carrying out curing treatment under the ultraviolet curing condition (shown in the table 1) to form a decorative coating (with the thickness of 12 μm);

And S3, loading the plane glass obtained in the S2 into a 3D mold in a convex structure with the side provided with the decorative coating facing a male mold in the 3D mold, and performing hot bending molding (the conditions are shown in the table 1) to obtain the required 3D glass, wherein the 3D glass is respectively marked as 3D glass products Y1-Y4.

Table 1.

In table 1:

the modified epoxy resin is organosilicon modified epoxy resin with a limited number of GR-5003 from Glupont nanometer materials in Dongguan, and the epoxy equivalent is 1000eq/100 g.

The epoxy resin curing agent is methyl tetrahydrophthalic anhydride which is commercially available from Jiangsu Sanmu group Co., Ltd and has the model number of SMS-01.

The polyester acrylate was a product commercially available from Sartomer, Guangzhou chemical company, Saedoma, Inc. model No. CN964 and had a tensile strength of 3300 psi.

the photoinitiator was a product commercially available from Ciba under model number 184.

The coupling agent is a silane coupling agent which is commercially available from Guangzhou Kyoho chemical Co., Ltd and has the model number of KH-550.

Xylene, methyl isobutyl copper and n-butanol were commercially available from alatin reagent, inc.

Example 5

(1) Coating composition for 3D glass decoration: with reference to example 1, the difference is that:

The same amount of novolac epoxy resin (commercially available from Dow chemical (DOW) and DEN425, with an epoxy equivalent of 169-175eq/100g) was used in place of the silicone epoxy resin in example 1;

The polyester acrylate of example 1 was replaced with an equivalent amount of polyester acrylate (commercially available from Sartomer, Guangzhou chemical Co., Ltd., model No. CN964, 2200psi tensile strength).

(2) preparation of 3D glass: the 3D glass prepared was designated Y5 using the same procedure as in example 1.

Example 6

The polyester acrylate (commercially available from Sartomer, guangzhou chemical limited, sandomoma, model CN971a80, with a tensile strength of 1157psi) was used in place of the foregoing polyester acrylate in equal amounts.

(2) Preparation of 3D glass: the 3D glass prepared was designated Y6 using the same procedure as in example 1.

Example 7

The same amount of novolac epoxy resin (which is commercially available from Jiangsu Sanmu group Co., Ltd., model number is F-44-50, and the epoxy equivalent is 454) is adopted to replace the organic silicon epoxy resin;

(2) Preparation of 3D glass: the 3D glass prepared was designated Y7 using the same procedure as in example 1.

Comparative example 1

(1) Coating composition for 3D glass decoration: with reference to example 1, the difference is that: polyester acrylate and a light curing agent were not added, and the amount of the thermosetting modified epoxy resin was 70.8 parts by weight;

(2) Preparation of 3D glass: the 3D glass prepared by the same process as in example 1 was designated DY 1.

Comparative example 2

An equivalent amount of polyester acrylate (commercially available from Sartomer, guangzhou chemical limited, model CN 966J 75NS, 428psi tensile strength) was used in place of the foregoing polyester acrylate.

(2) Preparation of 3D glass: the 3D glass prepared by the same process as in example 1 was designated DY 2.

The test method and the result are as follows:

1) And (3) testing the adhesive force: reference standard ISO 2409 (paints and varnishes-cross-hatch test)

the test method comprises the following steps: the coating was scribed 12 scratches using the back of a scalpel, at least two of which were at 90 ° angles to the other scratches, to form a grid on the surface, the grid having 1 mm sides. Ensuring that each score cuts to the base material. Brush 5 times in each direction along the scribe. A 3M tape (type 3M600, a product of the company audioceae, guan) was stuck on the surface, the tape was rubbed with a fingertip to ensure good contact with the coating, and the tape was peeled off regularly within 0.5 to 1 second from the free end of the tape at an angle of 60 ° within 5 minutes.

Grading:

5B: the edges of the cuts are completely smooth, and the squares of the grid are not peeled off;

4B: the area of the peeled portion is not more than 5% of the area of the adhesive tape in contact with the surface;

3B: the area of the peeled portion is more than 5% and not more than 15% of the area of the adhesive tape in contact with the surface;

2B: the area of the peeled portion is more than 15% and not more than 35% of the area of the adhesive tape in contact with the surface;

1B: the area of the peeled portion is more than 35% and not more than 65% of the area of the adhesive tape in contact with the surface.

The test requires that the adhesive force performance is more than or equal to 3B. The results are shown in Table 2.

2) appearance observation condition:

And observing whether the boundary has sawteeth or not and whether the surface has unevenness or not by naked eyes.

grading:

A: the boundary is clear, and the surface is smooth and has no unevenness;

B: the boundary is locally fuzzy, and/or the surface is basically smooth without unevenness and has slight flaws (the area is less than 1 percent of the total area);

C: the boundary is locally jagged, and/or the surface is locally (the area is less than 5 percent of the total area) uneven;

D: the boundary is locally jagged, and the surface is uneven (the area is more than 5 percent of the total area).

The results are shown in Table 2.

3) Neutral salt spray test

Equipment: a saline spray tester PC240005 was used:

Conditions are as follows: dissolving chemically pure sodium chloride in deionized water, wherein the concentration is 50 +/-5 g/L;

And (3) testing results: salt spray experiment tests show that whether the color and luster of the paint film are changed or not is observed by naked eyes within 48 hours. If the color and the gloss are not changed, the test is regarded as passed. The results are shown in Table 2.

4) Constant temperature and humidity test

The test method comprises the following steps: the samples were allowed to stand at each of-40 ℃ and 85 ℃ for 2 hours for a cycle, with a switching time of less than 10 seconds and a recovery time of less than 5 minutes for 10 cycles, and after the test was completed, the samples were recovered at room temperature for 2 hours. The condition of the sample was then observed. If the paint film has no bubble after the test, the sample has no abnormal phenomena such as cracking, falling, bubbling, discoloring and the like of the coating, and the test is regarded as passed. The results are shown in Table 2.

5) cold and heat shock test

TABLE 2

	Adhesion force	Appearance observation	Neutral salt spray	Constant temperature and humidity	cold and hot shock
						Y1	5B	A	By passing	by passing	By passing
Y2	5B	A	By passing	By passing	By passing
						Y3	5B	A	By passing	by passing	By passing
Y4	3B	B	By passing	by passing	By passing
						Y5	5B	A	By passing	By passing	By passing
Y6	4B	A	By passing	by passing	By passing
						Y7	3B	C	By passing	by passing	By passing
DY1	2B	d (surface crack full cloth)	Do not pass through	do not pass through	do not pass through
						DY2	2B	D (surface crack full cloth)	Do not pass through	do not pass through	Do not pass through

as can be seen from table 2, in the 3D glasses prepared in examples 1 to 7 using the coating composition for decorating 3D glass according to the present invention and the method for preparing 3D glass according to the present invention, the decorative coating has relatively good adhesion, a clear boundary, a substantially smooth surface without unevenness, and relatively good heat and humidity resistance, salt spray resistance, and thermal shock resistance, compared to comparative examples 1 and 2.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.

Claims

1. A coating composition for decorating glass, comprising, based on 100% by weight of the total composition: 40-80 wt% of thermosetting modified epoxy resin, 10-30 wt% of epoxy curing agent, 5-20 wt% of polyester acrylate, 1-5 wt% of photoinitiator and 0.1-6 wt% of coupling agent; wherein the polyester acrylate has a tensile strength of not less than 800psi,

The thermosetting epoxy resin is selected from novolac epoxy resin with the epoxy equivalent of 150-350eq/100g and/or organosilicon modified epoxy resin with the epoxy equivalent of 500-1500eq/100 g.

2. the coating composition of claim 1, wherein the coating composition comprises, based on 100% of its total weight: 48-75 wt% of thermosetting modified epoxy resin, 10-25 wt% of epoxy curing agent, 6-18 wt% of polyester acrylate, 1-4 wt% of photoinitiator and 0.5-5 wt% of coupling agent.

3. The coating composition of claim 1 or 2, wherein the polyester acrylate has a tensile strength of not less than 1000 psi.

4. The coating composition of claim 3, wherein the polyester acrylate has a tensile strength of not less than 2000 psi.

5. The coating composition of claim 3, wherein the polyester acrylate has a tensile strength of not less than 3000 psi.

6. The coating composition according to claim 1 or 2, wherein the epoxy curing agent is one or more selected from dicyandiamide, organic acid anhydride, amino resin, and polythiol compound.

7. the coating composition according to claim 1 or 2, wherein the coupling agent is one or more selected from silane coupling agents, titanate coupling agents and zirconium-based coupling agents.

8. A preparation method of 3D glass is characterized by comprising the following steps:

S1, weighing the components in the coating composition according to any one of claims 1 to 7 in proportion, and stirring and mixing in a solvent to obtain a coating mixture;

S2, covering the coating mixture on the surface of the plane glass to form a coating layer, and curing to form a decorative coating;

and S3, putting the plane glass with the decorative coating formed on the surface obtained in the S2 into a 3D mould, and carrying out hot bending forming to obtain the 3D glass.

9. the preparation method according to claim 8, wherein the step of stirring and mixing S1 in the solvent comprises:

S11, adding the thermosetting modified epoxy resin, the polyester acrylate and the coupling agent into a solvent under a first mixing condition, and stirring and mixing to obtain a primary mixture;

And S12, adding an epoxy curing agent and a photoinitiator into the primary mixture under a second mixing condition, and mixing to obtain the coating mixture.

10. The production method according to claim 9, wherein the first mixing condition includes: stirring at 1000-3000rpm for 10-30 min;

The second mixing conditions include: the stirring speed is 1000-3000rpm, and the stirring time is 10-30 min.

11. The method of claim 9, wherein the solvent is used in an amount of 5 to 25 wt% based on the total weight of the coating composition.

12. The preparation method according to claim 9, wherein the solvent comprises one or more diluents; when the solvent is a mixture of several diluents, the method further comprises a step of premixing the diluents to form a mixture solvent in S11.

13. The method of claim 12, wherein the diluent is selected from the group consisting of benzene, toluene, xylene, cyclohexane, cyclohexanone, toluene cyclohexanone, methanol, ethanol, isopropanol, diethyl ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, acetone, methyl butanone, methyl isobutyl ketone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol monobutyl ether.

14. The production method according to claim 8, wherein the decorative coating formed in S2 has a thickness of 5 to 20 μm.

15. The production method according to claim 8, wherein the cover layer in S2 is formed by a screen printing method.

16. the method of claim 8, wherein the step of curing in S2 includes:

(1) Precuring the coating layer under the heating and curing condition to form a precured coating;

(2) And curing the coating layer under the ultraviolet curing condition to form the decorative coating.

17. The production method according to claim 16, wherein the heat curing condition includes: heating at 150-180 deg.C for 60-90 min.

18. the method as claimed in claim 16, wherein the UV curing conditions include a UV intensity of 1500 and 2500mJ/cm ² and an irradiation time of 10-60 s.

19. The production method according to claim 8, wherein the molding conditions for the hot-roll molding in S3 include: the heating temperature is 550-650 ℃, and the heating time is 25-50 min.

20. A 3D glass produced by the production method according to any one of claims 8 to 19.