CN112920307B - Dual-curing acrylic resin and preparation method and application thereof - Google Patents
Dual-curing acrylic resin and preparation method and application thereof Download PDFInfo
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- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
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Abstract
The invention discloses a dual-curing acrylic resin and a preparation method and application thereof, wherein the dual-curing acrylic resin comprises the following raw materials: isobornyl methacrylate, acrylic acid, methyl methacrylate, styrene, hydroxyethyl acrylate, an initiator I, a phosphine catalyst, glycidyl methacrylate ether, a neutralizer and dipentaerythritol pentahexaacrylate. According to the invention, through the collocation of the raw materials, under the action of a phosphine catalyst, the dual-curing acrylic resin is formed; the resin has high double bond and hydroxyl content, and a paint film formed by ultraviolet curing has good hardness; the paint film properties are further improved by thermal curing.
Description
Technical Field
The invention relates to the field of coatings, in particular to a dual-curing acrylic resin and a preparation method and application thereof.
Background
The 3C coating is a general term mainly used for surface finishing coatings of three major electronic products, namely computers (computers), communications (communications) and Consumer Electronics (Consumer Electronics). Due to the characteristics of 3C electronic products, the requirements on the appearance and the function of the coating are stricter and more strict than those of the traditional electric appliance products and other electronic products. Firstly, the inherent 'high-grade' elements of the 3C product make the requirements on the appearance of the product strict, such as the smoothness, the uniformity, the color stability and the like of a paint film; secondly, the mobile phone electronic product has the characteristics of portability, normal touch and multi-environment use, and also contributes to the extremely high requirements of the 3C electronic product on the paint film functionality of the 3C paint, such as high hardness, high wear resistance, excellent chemical resistance, secondary paint film performance after damage of high temperature, high humidity, water boiling and the like.
The silver paint is widely favored by people with rich colors, excellent effect of color variation along with angles and elegant and graceful decorative effect, and the preparation routes of the water-based silver paint in the related technology all have certain defects: 1) an aqueous self-drying system: the problems exist that the curing time is long, the wear resistance is poor, the RCA can only be dozens, and the requirement of the 3C field on wear resistance is difficult to meet. 2) Aqueous PU systems: there are problems of long curing time and poor abrasion resistance, similar to those of the self-drying system. 3) Aqueous UV systems: there are problems that the curing of the color-imparting system is not complete and the boiling resistance and RCA are poor.
Therefore, it is required to develop a dual-curing acrylic resin for aqueous silver paint, which can produce aqueous silver paint with short curing time and complete curing.
Disclosure of Invention
The first technical problem to be solved by the invention is as follows: the double curing acrylic resin can be used for preparing the waterborne silver paint with short curing time and complete curing.
The second technical problem to be solved by the invention is as follows: a preparation method of the dual-curing acrylic resin.
The third technical problem to be solved by the invention is as follows: the application of the dual-curing acrylic resin is provided.
The fourth technical problem to be solved by the invention is as follows: a water-based silver paint has short curing time and complete curing.
In order to solve the first technical problem, the present application provides a technical solution that: the double bond density of the dual-curing acrylic resin is 1.7-1.9 mol/kg;
the hydroxyl content of the dual-curing acrylic resin is 2.5-2.6 mol/kg.
According to some embodiments of the invention, the resin has a dry film TG in the range of 90 ℃ to 100 ℃.
According to some embodiments of the invention, the resin has an average relative molecular weight of 30000 to 40000.
According to some embodiments of the invention, the dual cure acrylic resin comprises the following raw materials: isobornyl methacrylate, acrylic acid, methyl methacrylate, styrene, hydroxyethyl acrylate, an initiator I, a phosphine catalyst, glycidyl methacrylate ether, a neutralizer and dipentaerythritol pentahexaacrylate.
Isobornyl methacrylate is used to provide high TG and fast solvent release; the acrylic acid provides hydrophilicity to the resin after neutralization; methyl methacrylate is used to provide high TG and good adhesion as well as excellent recoat performance; styrene is used to provide high TG and rapid solvent release; hydroxyethyl acrylate is used to provide the hydroxyl groups needed for thermal curing.
According to some embodiments of the present invention, the dual curing acrylic resin comprises the following raw materials in parts by weight:
120-140 parts of isobornyl methacrylate;
90-110 parts of acrylic acid;
50-70 parts of methyl methacrylate;
140-160 parts of styrene;
50-60 parts of hydroxyethyl acrylate;
4-5 parts of an initiator I;
9-11 parts of a phosphine catalyst;
140-160 parts of glycidyl methacrylate;
30-40 parts of a neutralizing agent;
and 240-260 parts of dipentaerythritol pentahexaacrylate.
According to some embodiments of the invention, the feedstock further comprises 400 to 500 parts of a solvent.
According to some embodiments of the invention, the solvent i is an ester solvent.
According to some embodiments of the invention, the ester solvent comprises butyl ester.
According to some embodiments of the invention, the butyl ester comprises at least one of butyl acetate, butyl formate and butyl propionate.
According to some embodiments of the invention, the feedstock further comprises 950 to 1050 parts of water.
According to some embodiments of the invention, the initiator I comprises di-tert-butyl peroxide.
According to some embodiments of the invention, the phosphine catalyst comprises triphenylphosphine.
According to some embodiments of the invention, the neutralizing agent comprises an organic base.
According to some embodiments of the invention, the organic base comprises at least one of triethylamine or triethanolamine.
The dual-curing acrylic resin according to the embodiment of the invention has at least the following beneficial effects: according to the invention, through the collocation of the raw materials, under the action of a phosphine catalyst, the dual-curing acrylic resin is formed; the resin has high double bond and hydroxyl content, and a paint film formed by ultraviolet curing has good hardness; the paint film performance is further improved through thermal curing, and particularly the RCA and physical properties of the paint film are improved in a black adding system; because the resin has more hydrophilic groups, the emulsification of the dipentaerythritol penta-hexaacrylate is better realized, so that the performance of a paint film is further improved; since the resin has a high TG, quick drying is achieved, giving an excellent silver-aligning effect.
In order to solve the second technical problem, the technical scheme provided by the invention is as follows: the preparation method of the dual-curing acrylic resin comprises the following steps:
s1, adding isobornyl methacrylate, acrylic acid, methyl methacrylate, styrene, hydroxyethyl acrylate and an initiator I into a solvent, and reacting at the temperature of 105-120 ℃ to obtain a precursor;
s2, cooling to 90-100 ℃, adding a phosphine catalyst into the precursor, dropwise adding glycidyl methacrylate, and reacting after the addition is finished to obtain a prepolymer;
s3, cooling to 30-50 ℃, adding a neutralizing agent into the prepolymer, adding dipentaerythritol pentahexaacrylate, adding water for dispersion, and extracting the solvent to obtain the dual-curing acrylic resin.
The preparation method of the dual-curing acrylic resin provided by the embodiment of the invention has at least the following beneficial effects: the resin obtained by the preparation method has the performance of self-drying resin; through thermal curing and UV curing, the performance is greatly improved, and the problem of additive color of the resin is solved; the invention greatly improves the performance of the resin by regulating and controlling the temperature in the preparation process.
In order to solve the third technical problem, the technical scheme provided by the invention is as follows: the dual-curing acrylic resin is applied to the preparation of the water-based silver paint.
According to the application of the embodiment of the invention, at least the following beneficial effects are achieved: the application solves the problem of difficult color adding in a UV curing system; meanwhile, the problems of poor wear resistance and low RCA in a self-drying system or a thermosetting system are solved, and the requirements of the application performance in the 3C field are met.
In order to solve the fourth technical problem of the present invention, the technical solution provided by the present invention is: the water-based silver paint is characterized in that: the method comprises the following raw materials: a component A and a component B;
wherein the component A comprises the following raw materials: the dual-curing acrylic resin, the water-based silver powder, the initiator II and the auxiliary agent;
the component B comprises a water-based isocyanate curing agent.
According to some embodiments of the invention, the mass ratio of the A component to the B component is 90 to 100:9 to 10.
According to some embodiments of the invention, the adjuvant comprises a matte powder, a thickener, a dispersant, a wetting agent and a solvent ii.
According to some embodiments of the invention, the solvent ii comprises water and an organic solvent.
According to some embodiments of the invention, the organic solvent comprises propylene glycol butyl ether.
According to some embodiments of the invention, the component a comprises the following raw materials in parts by weight:
63-65 parts of dual-curing acrylic resin;
5-7 parts of water-based silver powder;
0.5-0.7 parts of matte powder;
1-2 parts of an initiator II;
1-2 parts of a thickening agent;
0.5-0.7 parts of a dispersant;
0.5-0.7 parts of wetting agent;
and 20-26 parts of a solvent II.
The water-based silver paint provided by the embodiment of the invention has at least the following beneficial effects: the water-based silver paint disclosed by the invention utilizes the excellent performance brought by the UV curing of the dual-curing acrylic resin, and also utilizes the supplement of the dual-curing acrylic resin to the performance of a paint film brought by the thermal curing of the dual-curing acrylic resin, so that the problem of the coloring of the paint film is solved; the resin structure has a large number of benzene rings, and the TG value of the resin is improved, so that the resin has good quick-drying property, and an excellent silver bar effect is brought; the resin has good application performance of self-drying resin, and the performance of the resin is further improved through thermosetting; the resin contains a large number of double bonds, so that the emulsification of dipentaerythritol pentahexaacrylate is realized, the crosslinking density of the resin is further improved, and the resin is endowed with excellent wear resistance and water boiling resistance; meanwhile, the skeleton of the resin is acrylic resin, which is beneficial to recoating a paint film.
Detailed Description
The idea of the invention and the resulting technical effects will be clearly and completely described below in connection with the embodiments, so that the objects, features and effects of the invention can be fully understood. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
The first embodiment of the invention is as follows: a preparation method of dual-curing acrylic resin comprises the following steps:
s1, 5000mL of a four-necked flask equipped with a stirrer was charged with 450g of butyl acetate, and the temperature was raised to 110 ℃ while stirring was started.
S2, adding 130g of isobornyl methacrylate, 100g of acrylic acid, 60g of methyl methacrylate, 150g of styrene, 60g of hydroxyethyl acrylate and 4.4g of initiator di-tert-butyl peroxide into a glass beaker; the mixture is added into a constant pressure dropping funnel after being stirred evenly.
S3, after the temperature of the four-neck flask is raised to 110 ℃, slowly dripping the materials in the constant pressure dropping funnel for 4 h.
S4, after the materials in the constant pressure dropping funnel are dropped, preserving the heat for 4 hours at 110 ℃.
And S5, after the heat preservation is finished, cooling the four-neck flask to 100 ℃, adding 10g of triphenylphosphine, dropwise adding 148g of glycidyl methacrylate for 2h, and preserving the heat for 4h after the dropwise adding is finished.
S6, cooling the four-neck flask to 40 ℃, adding 35g of triethylamine for neutralization for 10min, adding 250g of dipentaerythritol penta-hexaacrylate, and uniformly dispersing.
S6, slowly adding 2000g of water for 2 hours, and removing butyl ester by vacuum distillation after the water is added to obtain the milky-white double-curing acrylic resin with blue light.
The dry film TG of the dual-curing acrylic resin prepared in the first embodiment of the invention is 100 ℃; the number average molecular weight is 3-4 ten thousand; the density of the solid double bonds is 1.8 mol/kg; the hydroxyl content is 2.58 mol/kg; therefore, the resin has high double bond and hydroxyl content, the paint film has good hardness after being cured by ultraviolet light, the paint film performance is further improved after being cured by heat, and the defects of low RCA (rolling circle amplification) and poor physical property of the paint film caused by incomplete curing are thoroughly overcome particularly in a black system (the black system refers to adding black paste into water-based paint). Meanwhile, the resin well emulsifies dipentaerythritol pentahexaacrylate due to more hydrophilic groups, so that the performance of a paint film is further improved. The resin provides a good silver-aligning effect due to its high TG.
The second embodiment of the invention is as follows: the water-based silver paint comprises a component A and a component B:
the formula of the component A of the water-based silver paint is as follows:
63.4 parts of dual-curing acrylic resin prepared in the first example;
6 parts of water-based silver powder;
0.6 part of dumb powder (Dongcao 1011);
initiator (IGM 1173 and IGM 184) 2 parts (IGM 1173 and IGM184 in each case);
1 part of thickening agent (digao 3030);
0.5 part of dispersant (digao 750);
0.5 part of wetting agent (digao 270);
6 parts of propylene glycol butyl ether;
20 parts of water;
the total amount is 100 parts.
The component B of the water-based silver paint is a water-based isocyanate curing agent (Cosimva Bayhydur 304).
The weight part ratio of the component A to the component B is 100: 10.
and dispersing the component A and the component B for 10min, and filtering to obtain the water-based silver paint.
Spraying the water-based silver paint prepared in the second embodiment on a target plastic board, wherein the film thickness of the paint film is 12-15 microns, baking for 8min at 60 ℃ after spraying, and curing under the illumination of a UV lamp, wherein the curing energy is 1000mj/cm2。
The third embodiment of the invention is as follows: the water-based silver paint comprises a component A and a component B:
the formula of the component A of the water-based silver paint is as follows:
63.4 parts of dual-curing acrylic resin prepared in the first example;
6 parts of water-based silver powder;
0.6 part of dumb powder (Dongcao 1011);
2 parts of initiator (IGM 1173 and IGM 184) (one part each of IGM1173 and IGM 184);
1 part of thickener (BYK 299);
0.5 part of dispersant (BYK 164);
0.5 part of wetting agent (digao 245);
6 parts of propylene glycol butyl ether;
20 parts of water;
the total amount is 100 parts.
The component B of the water-based silver paint is a water-based isocyanate curing agent (Cosimva Bayhydur 304).
The weight part ratio of the component A to the component B is 100: 9.
and dispersing the component A and the component B for 10min, and filtering to obtain the water-based silver paint.
Spraying the water-based silver paint prepared in the third embodiment on a target plastic board, wherein the film thickness of the paint film is 12-15 microns, baking for 8min at 60 ℃ after spraying, and curing under the illumination of a UV lamp, wherein the curing energy is 1000mj/cm2。
The fourth embodiment of the invention is as follows: the water-based silver paint comprises a component A and a component B:
the formula of the component A of the water-based silver paint is as follows:
63.4 parts of dual-curing acrylic resin prepared in the first example;
6 parts of water-based silver powder;
0.6 part of dumb powder (Dongcao 1011);
2 parts of initiator (IGM 1173 and IGM 184) (one part each of IGM1173 and IGM 184);
1 part of thickener (digao 3030);
0.5 part of dispersant (digao 750);
0.5 part of wetting agent (YCK 1110);
6 parts of propylene glycol butyl ether;
20 parts of water;
the total amount is 100 parts.
The component B of the waterborne silver paint is waterborne isocyanate curing agent (Cosburg Bayhydur 304).
The weight part ratio of the component A to the component B is 90: 10.
and dispersing the component A and the component B for 10min, and filtering to obtain the water-based silver paint.
Spraying the waterborne silver paint prepared in the fourth embodiment on a target plastic plate, wherein the film thickness of the paint film is 12-15 mu m, baking for 8min at 60 ℃ after spraying, and curing under the illumination of a UV lamp, wherein the curing energy is 1000mj/cm2。
The first comparative example of the present invention is: a preparation method of acrylic resin comprises the following steps:
s1, 5000mL of a four-necked flask equipped with a stirrer was charged with 450g of butyl acetate, and the temperature was raised to 110 ℃ while stirring was started.
S2, adding 60g of isobornyl methacrylate, 100g of acrylic acid, 60g of methyl methacrylate, 100g of styrene, 60g of hydroxyethyl acrylate, 120 g of butyl acrylate and 4.4g of initiator di-tert-butyl peroxide into a glass beaker, and uniformly stirring; add to a constant pressure dropping funnel.
S3, after the temperature of the four-neck flask is raised to 110 ℃, slowly dripping the materials in the constant pressure dropping funnel for 4 h.
S4, after the dropwise addition is finished, the reaction is carried out for 4 hours at the temperature of 110 ℃.
S5, after the heat preservation is finished, cooling the four-neck flask to 100 ℃, adding 10g of triphenylphosphine, dropwise adding 148g of glycidyl methacrylate for 2h, and after the dropwise adding is finished, preserving the heat at 100 ℃ for reacting for 4 h.
S6, after the heat preservation is finished, cooling the four-neck flask to 40 ℃, adding 35g of triethylamine, neutralizing for 10min, adding 250g of dipentaerythritol pentahexaacrylate, and uniformly dispersing.
S7, slowly adding 2000g of water for 2 hours, and removing butyl ester by vacuum distillation after the water is added to obtain milky acrylic resin with blue light.
The resin structure synthesized by the technical route only contains more butyl acrylate than the resin structure in the embodiment 1, but the dry film TG of the resin is only 48 ℃, the number average molecular weight is 3-4 ten thousand, the density of the double bonds of the solid part is 1.8mol/kg, and the hydroxyl content is 2.58mol/kg, so the double bonds and the hydroxyl content of the resin are also higher, but the hardness of the paint film after ultraviolet curing is poorer, the performance of the paint film is further improved after thermal curing, but the wear resistance of the resin is still poorer, the problems of lower RCA of the paint film and poorer physical properties caused by incomplete curing of a black system cannot be solved, and simultaneously, the TG of the resin is lower, and the orientation effect of silver is poorer.
The second comparative example of the present invention is: the water-based silver paint comprises the following raw materials: a component A and a component B.
The formula of the component A of the water-based silver paint is as follows:
63.4 parts of dual-curing acrylic resin prepared in comparative example I;
6 parts of water-based silver powder;
0.6 part of dumb powder (Dongcao 1011);
initiator (IGM 1173 and IGM 184) 2 parts (IGM 1173 and IGM184 in each case);
1 part of thickener (digao 3030);
0.5 part of dispersant (digao 750);
0.5 part of wetting agent (digao 270);
6 parts of propylene glycol butyl ether;
20 parts of water;
the total amount is 100 parts.
The silver paint B group is a water-based isocyanate curing agent, such as Cosmaba Bayhydur 304, and the component A: b-component = 100: 10.
the component B of the waterborne silver paint is waterborne isocyanate curing agent (Cosburg Bayhydur 304).
The weight part ratio of the component A to the component B is 100: 10.
and dispersing the component A and the component B for 10min, and filtering to obtain the water-based silver paint.
Spraying the water-based silver paint prepared in the second embodiment on a target plastic board, wherein the film thickness of the paint film is 15-20 microns, baking for 8min at 60 ℃ after spraying, and curing under the illumination of a UV lamp, wherein the curing energy is 800mj/cm2。
The performance test method of the coating comprises the following steps: the glossiness test adopts a 60-degree glossiness instrument;
the L value is measured by a color difference meter;
RCA value test standard reference: ASTM F2357-04, test load 175 g;
and (3) testing the water boiling performance: and (3) performing a boiling test at 85 ℃, taking out after boiling for a period of time, cooling to room temperature at normal temperature, and performing an adhesion test after checking the appearance (the adhesion test is qualified if being superior to 4B).
TABLE 1 Performance test results for coatings prepared in inventive example two and comparative examples two to three
| Example two | Comparative example No. two | |
| Degree of gloss | 22 | 24 |
| Value of L | 86.4 | 80.4 |
| RCA | 500 | 80 |
| Boiling in water | 1h | 0.5h，NG |
| Recoating | 7D | 7D |
By comparing the performance test results of the second embodiment of the invention with those of the second comparative embodiment, the RCA value of the water-based silver paint prepared by the second embodiment of the invention is high, and the boiling resistance is good, which shows that the resin in the second embodiment of the invention is cured thoroughly; meanwhile, the resin structure of acrylic acid is also known, and the water boiling performance and the RCA value of the coating can be improved only by having higher TG and simultaneously having high double bond content and hydroxyl content.
In conclusion, the water-based silver paint provided by the invention utilizes the excellent performance brought by the UV curing of the dual-curing acrylic resin, and also utilizes the supplement of the dual-curing acrylic resin to the performance of a paint film brought by the thermal curing of the dual-curing acrylic resin, thereby solving the problem of the coloring of the paint film; the resin structure has a large number of benzene rings, and the TG value of the resin is improved, so that the resin has good quick-drying property, and an excellent silver bar effect is brought; the resin has good application performance of self-drying resin, and the performance of the resin is further improved through thermosetting; the resin contains a large number of double bonds, so that the emulsification of dipentaerythritol pentahexaacrylate is realized, the crosslinking density of the resin is further improved, and the resin is endowed with excellent wear resistance and water boiling resistance; meanwhile, the skeleton of the resin is acrylic resin, which is beneficial to recoating a paint film.
While the embodiments of the present invention have been described in detail with reference to the description, the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (11)
1. A preparation method of dual-curing acrylic resin is characterized by comprising the following steps: the method comprises the following steps:
s1, adding isobornyl methacrylate, acrylic acid, methyl methacrylate, styrene, hydroxyethyl acrylate and an initiator I into the solvent I, and reacting at the temperature of 105-120 ℃ to obtain a precursor;
s2, cooling to 90-100 ℃, adding a phosphine catalyst into the precursor, dropwise adding glycidyl methacrylate, and reacting to obtain a prepolymer after the addition is finished;
s3, cooling to 30-50 ℃, adding a neutralizing agent into the prepolymer, adding dipentaerythritol pentahexaacrylate, adding water for dispersion, and extracting a solvent I to obtain the dual-curing acrylic resin;
the dual-curing acrylic resin comprises the following preparation raw materials in parts by weight: 120-140 parts of isobornyl methacrylate, 90-110 parts of acrylic acid, 50-70 parts of methyl methacrylate, 140-160 parts of styrene, 50-60 parts of hydroxyethyl acrylate, 4-5 parts of an initiator I, 9-11 parts of a phosphine catalyst, 140-160 parts of glycidyl methacrylate, 30-40 parts of a neutralizer, 240-260 parts of dipentaerythritol pentahexaacrylate, 400-500 parts of a solvent I and 950-1050 parts of water;
the solvent I is at least one of butyl acetate, butyl formate and butyl propionate;
the initiator I is di-tert-butyl peroxide.
2. The method of claim 1, wherein: the phosphine catalyst is triphenylphosphine.
3. The method of claim 1, wherein: the neutralizing agent is at least one of triethylamine or triethanolamine.
4. The method of claim 1, wherein: the double bond density of the dual-curing acrylic resin is 1.7-1.9 mol/kg.
5. The method of claim 1, wherein: the hydroxyl content of the dual-curing acrylic resin is 2.5-2.6 mol/kg.
6. The method of claim 1, wherein: the TG value of the dual-curing acrylic resin is 90-110 ℃.
7. The method of claim 1, wherein: the average relative molecular mass of the dual-curing acrylic resin is 3-4 ten thousand.
8. Use of the dual-curing acrylic resin prepared by the preparation method of any one of claims 1 to 7 in the preparation of water-based silver paint.
9. The water-based silver paint is characterized in that: the method comprises the following preparation raw materials: a component A and a component B;
wherein the component A comprises the following preparation raw materials: the dual curing acrylic resin prepared by the preparation method of any one of claims 1 to 7, water-based silver powder, an initiator II, matte powder, a thickener, a dispersant, a wetting agent and a solvent II;
the component B comprises a water-based isocyanate curing agent;
the initiator II consists of IGM1173 and IGM 184;
the solvent II is water and propylene glycol butyl ether.
10. The aqueous silver paint according to claim 9, characterized in that: the mass ratio of the component A to the component B is 90-100: 9-10.
11. The aqueous silver paint according to claim 9, characterized in that: the component A comprises the following raw materials in parts by weight: 63-65 parts of dual-curing acrylic resin, 5-7 parts of water-based silver powder, 0.5-0.7 part of matte powder, 1-2 parts of initiator II, 1-2 parts of thickener, 0.5-0.7 part of dispersant, 0.5-0.7 part of wetting agent and 20-26 parts of solvent II.
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| CN102220096A (en) * | 2010-04-09 | 2011-10-19 | 日东电工株式会社 | Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive tape |
| CN102208538A (en) * | 2011-04-18 | 2011-10-05 | 电子科技大学 | Substrate for flexible photoelectronic device and preparation method thereof |
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