CN114316726A - Low-temperature curing water-soluble acrylic resin coating - Google Patents
Low-temperature curing water-soluble acrylic resin coating Download PDFInfo
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- CN114316726A CN114316726A CN202111560993.4A CN202111560993A CN114316726A CN 114316726 A CN114316726 A CN 114316726A CN 202111560993 A CN202111560993 A CN 202111560993A CN 114316726 A CN114316726 A CN 114316726A
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Abstract
The invention relates to a low-temperature curing water-soluble acrylic resin coating and a preparation method thereof. The invention has the advantages of low curing temperature and good extensibility on the premise of keeping good performance of the acrylic resin.
Description
Technical Field
The invention belongs to the field of baking varnish construction, and particularly relates to a water-based acrylic resin coating.
Background
The water-based acrylic resin has the advantages of low price, safe use, resource and energy conservation, environmental pollution and public nuisance reduction, and the like, and the water-based acrylic resin coating is pollution-free coating which is the fastest developed and most diversified in water-based coatings, so the water-based acrylic resin coating becomes the main direction for developing the material industry at present.
However, the aqueous acrylic resin coating has the defects of high curing temperature, brittle paint film and the like, and cannot adapt to special application. In the prior art, acrylic resin is usually modified, and although the curing temperature of a polymer resin coating is reduced and the hardness, scratch resistance and self-cleaning performance are improved, the curing effect is poor, and the performance such as film forming, ductility and the like of the polymer is easy to reduce. For example, CN108467648B discloses a coating with good stability, good paint film flatness and strong anti-pollution capability, but the curing temperature is 190-200 ℃.
Benzoxazine resin is a novel thermosetting heat-resistant polymer which appears internationally in recent years, has the characteristics of simple synthesis, low curing temperature and low cost due to a bridging structure and a unique hydrogen bonding effect in molecules, is expected to replace the traditional thermosetting resin in many fields, but has the defect of low glass transition temperature in the preparation process of the benzoxazine resin, and limits further industrial application of the benzoxazine resin.
Disclosure of Invention
The invention aims to provide a low-temperature curing water-soluble acrylic resin coating which has the advantages of low curing temperature, good extensibility and high stability.
The technical scheme adopted by the invention for solving the problems is as follows:
a low-temperature curing water-soluble acrylic resin coating comprises silver-plated glass fiber modified acrylic resin, pigment, epoxy resin, sulfonated polybenzoxazine resin and high imino melamine resin.
Further, the mass parts of the components are 30-50 parts of sulfonated polybenzoxazine resin; 1-5 parts of pigment; 10-20 parts of silver-plated glass fiber modified acrylic resin; 1-2 parts of epoxy resin; 15-25 parts of high imino melamine resin.
Further, the high imino group melamine resin is mixed etherified high imino group melamine resin, wherein the mass ratio of the methylated melamine resin to the butylated melamine resin to the phosphate modified melamine resin is 1: 0.5-1.5: 0.3 to 0.5.
Further, the preparation method of the coating comprises the following steps:
firstly, preparing silver-plated glass fiber modified acrylic resin: step 1: uniformly mixing 10-15 parts of methacrylic acid monomer, 5-10 parts of acrylic acid monomer, 3-4 parts of isooctyl methacrylate, 6-9 parts of n-butyl acrylate, 5-8 parts of methyl methacrylate, 1-3 parts of styrene and 2-3 parts of aromatic polycarbonate; step 2: taking 10-15 parts of a base material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 80-100 ℃, dropwise adding the mixed monomer solution prepared in the step 1 into a reaction container for 2-3 hours, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 2.5-4 hours, and then sequentially adding a neutralizing agent and an antifoaming agent; and step 3: cooling the reaction to below 60 ℃, adding 5-10 parts of silver-plated glass fiber and 0.1-0.5 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 1-2 h;
II, high imino group melamine resin: methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the mass ratio of 1: 0.5-1.5: 0.3-0.5, and uniformly mixing for later use;
preparing a sulfonated polybenzoxazine epoxy resin blend: dissolving benzidine disulfonic acid and 3-pentadecylphenol in excess formaldehyde according to the molar ratio of 1:2 to generate sulfonated polybenzoxazine, mixing a proper amount of lignin, and mixing the materials in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin;
fourthly, preparing the coating: mixing the prepared silver-plated glass fiber modified acrylic resin, high imino melamine resin, sulfonated polybenzoxazine epoxy resin blend and pigment according to parts by mass, adding a proper amount of deionized water, and uniformly mixing。
Further, the preparation process of the silver-plated glass fiber comprises the following steps:
s1, adding SnCl into glass fiber with diameter of 25 μm and length of 5 cm2 20 g/L of hydrochloric acid of 80 mL/L, ultrasonic stirring at 30 ℃ for 20 min, and the glass fiber loading of 5 g/L; washing with deionized water, and addingInto AgNO3 0.5g/L，NH3·H2O40 mL/L, ultrasonically stirring for 10 min at 30 ℃, cleaning with deionized water, and drying for later use;
S2、AgNO35-10 g/L, 5-15 g/L glucose, C2H5OH 60~100g/L，NH3·H2100 mL/L of O, 3-6 g/L of NaOH, 1.0-1.5 mg/L of KI, 20 g/L of glass fiber loading capacity, 15-45 ℃, ultrasonic stirring for 10-15 min, and plating silver on the surface of the glass fiber in a rough manner.
In the preparation process of the silver-plated glass fiber, silver nitrate with low cost is used as an activating agent, glucose is used as a reducing agent, KI is used as a stabilizing agent, and nano silver is electroplated on the surface of the glass fiber to obtain the silver-plated glass fiber, wherein the ductility of the silver-plated glass fiber can be enhanced.
Rough silver plating: when the plating is carried out for 10-15 min, the plating layer is rough, and part of the glass fiber is exposed outside and contains hydroxyl; the silver-plated surface of the glass fiber silver-plated layer is completely plated with silver for too long time, but no crosslinking sites exist.
Further, the coupling agent is an aliphatic urethane acrylate with isocyanate.
Compared with the prior art, the invention has the advantages that:
(1) when the construction temperature is reduced, a paint film becomes brittle, the glass fiber is treated by adopting a coupling agent, the silane is hydrolyzed to generate triol which is combined with silanol on the surface of the glass fiber, the mechanical properties such as strength, ductility and the like of the paint are improved by the glass fiber modified acrylic resin, the ductility is further increased by the rough silver plating on the surface of the glass fiber, the stability is good during transportation, and the polymerization inhibition effect is achieved at normal temperature;
(2) the polybenzoxazine resin has good compatibility with epoxy resin, the mixture has high chemical stability, can be polymerized by self-opening rings at a specific temperature, and reduces the curing temperature, but the glass transition temperature of the formed coating is lower, so that the sulfonated polybenzoxazine resin can introduce a functional group with strong electricity absorption property to reduce the curing temperature, can improve the glass transition temperature of the resin, and can form a self-opening ring crosslinked network framework; the addition of lignin can also obviously reduce the formaldehyde emission of the copolycondensation resin gluing product.
(3) The methylated melamine resin, the butylated melamine resin and the phosphate modified melamine resin are mixed etherified amino resin, have high imino content and high activity, reduce the curing temperature and can be used as a cross-linking agent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical effects of the acrylic resin with high nitric acid resistance and the preparation method thereof according to the present invention will be further described with reference to the following specific examples, but the specific implementation methods mentioned in these examples are only illustrative and explanatory of the technical solution of the present invention, and do not limit the implementation scope of the present invention, and all modifications and substitutions based on the above principles should be within the protection scope of the present invention.
The preparation method of the silver-plated glass fiber comprises the following steps: adding SnCl into glass fiber with diameter of 25 μm and length of 5 cm220 g/L of hydrochloric acid of 80 mL/L, ultrasonic stirring for 20 min at 30 ℃, and glass fiber loading of 5 g/L; adding AgNO after washing with deionized water3 0.5g/L，NH3·H2O40 mL/L, ultrasonically stirring for 10 min at 30 ℃, cleaning with deionized water, and drying for later use; AgNO35-10 g/L, 5-15 g/L glucose, C2H5OH 60~100g/L，NH3·H2100 mL/L of O, 3-6 g/L of NaOH, 1.0-1.5 mg/L of KI, 20 g/L of glass fiber, 15-45 ℃, ultrasonic stirring for 10-15 min, and plating silver on the surface of the glass fiber in a rough manner.
The preparation method of the sulfonated polybenzoxazine comprises the following steps: the mass ratio of benzidine disulfonic acid to 3-pentadecylphenol is 7: 12, dissolving in excessive formaldehyde, wherein the formaldehyde is a solvent and participates in the reaction, 3 parts by mass of formaldehyde is consumed when 10 parts by mass of sulfonated polybenzoxazine is generated to generate the sulfonated polybenzoxazine, the sulfonated polybenzoxazine is diluted by a diluent phosphoric acid and can be precipitated by water and formaldehyde, and a proper amount of lignin is added to prevent formaldehyde which is not completely removed from being released.
Example 1
Uniformly mixing 10 parts of methacrylic acid monomer, 5 parts of acrylic acid monomer, 3 parts of methacrylic acid isooctyl ester, 6 parts of n-butyl acrylate, 5 parts of methyl methacrylate, 1 part of styrene and 2 parts of aromatic polycarbonate; taking 10 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 h, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3h, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, adding 5 parts of silver-plated glass fiber and 0.2 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 1h to obtain the silver-plated glass fiber modified acrylic resin.
Methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1:1: 0.5 mass ratio for mixing evenly for standby.
Mixing the components in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin to obtain the sulfonated polybenzoxazine epoxy resin blend.
Mixing 10 parts of the prepared silver-plated glass fiber modified acrylic resin, 15 parts of high imino melamine resin, 30 parts of sulfonated polybenzoxazine epoxy resin blend and 2 parts of pigment according to parts by mass, adding proper deionized water, and uniformly stirring.
Example 2
Uniformly mixing 15 parts of methacrylic acid monomer, 10 parts of acrylic acid monomer, 4 parts of isooctyl methacrylate, 9 parts of n-butyl acrylate, 8 parts of methyl methacrylate, 3 parts of styrene and 3 parts of aromatic polycarbonate; taking 15 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 hours, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3 hours, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, adding 10 parts of silver-plated glass fiber and 0.5 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 2 hours to obtain the silver-plated glass fiber modified acrylic resin.
Methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1:1: 0.5, and uniformly mixing for later use.
Mixing the components in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin to obtain the sulfonated polybenzoxazine epoxy resin blend.
Mixing 10 parts of the prepared silver-plated glass fiber modified acrylic resin, 15 parts of high imino melamine resin, 30 parts of sulfonated polybenzoxazine epoxy resin blend and 2 parts of pigment according to parts by mass, adding proper deionized water, and uniformly stirring.
Example 3
Uniformly mixing 10 parts of methacrylic acid monomer, 5 parts of acrylic acid monomer, 3 parts of methacrylic acid isooctyl ester, 6 parts of n-butyl acrylate, 5 parts of methyl methacrylate, 1 part of styrene and 2 parts of aromatic polycarbonate; taking 10 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 h, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3h, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, adding 5 parts of silver-plated glass fiber and 0.2 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 1h to obtain the silver-plated glass fiber modified acrylic resin.
Methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1:1: 0.5, and uniformly mixing for later use.
Mixing the components in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin to obtain the sulfonated polybenzoxazine epoxy resin blend.
And mixing 20 parts of the prepared silver-plated glass fiber modified acrylic resin, 25 parts of high imino melamine resin, 50 parts of sulfonated polybenzoxazine epoxy resin blend and 2 parts of pigment according to parts by mass, adding proper deionized water, and uniformly stirring.
Comparative example 1
Uniformly mixing 10 parts of methacrylic acid monomer, 5 parts of acrylic acid monomer, 3 parts of methacrylic acid isooctyl ester, 6 parts of n-butyl acrylate, 5 parts of methyl methacrylate, 1 part of styrene and 2 parts of aromatic polycarbonate; taking 10 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 h, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3h, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, adding 5 parts of silver-plated glass fiber and 0.2 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 1h to obtain the silver-plated glass fiber modified acrylic resin.
Mixing the components in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin to obtain the sulfonated polybenzoxazine epoxy resin blend.
Mixing 10 parts of the prepared silver-plated glass fiber modified acrylic resin, 40 parts of sulfonated polybenzoxazine epoxy resin blend and 2 parts of pigment according to parts by mass, adding proper deionized water, and uniformly stirring.
Comparative example 2
Uniformly mixing 15 parts of methacrylic acid monomer, 10 parts of acrylic acid monomer, 4 parts of isooctyl methacrylate, 9 parts of n-butyl acrylate, 8 parts of methyl methacrylate, 3 parts of styrene and 3 parts of aromatic polycarbonate; taking 15 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 hours, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3 hours, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, adding 10 parts of silver-plated glass fiber and 0.5 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 2 hours to obtain the silver-plated glass fiber modified acrylic resin.
Methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1:1: 0.5, and uniformly mixing for later use.
Mixing 10 parts of silver-plated glass fiber modified acrylic resin, 15 parts of high imino group melamine resin and 2 parts of pigment according to the mass parts, adding proper deionized water and stirring uniformly.
Comparative example 3
Uniformly mixing 10 parts of methacrylic acid monomer, 5 parts of acrylic acid monomer, 3 parts of methacrylic acid isooctyl ester, 6 parts of n-butyl acrylate, 5 parts of methyl methacrylate, 1 part of styrene and 2 parts of aromatic polycarbonate; taking 10 parts of a bottom material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 85 ℃, dropwise adding the prepared mixed monomer solution into a reaction container for 2-3 h, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 3h, and then sequentially adding a neutralizer and a defoaming agent; and (3) cooling the reaction to below 60 ℃, and carrying out ultrasonic treatment for 1h to obtain the polyacrylic resin.
Methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1:1: 0.5, and uniformly mixing for later use.
Mixing the components in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin to obtain the sulfonated polybenzoxazine epoxy resin blend.
Mixing 10 parts of the prepared polyacrylic resin, 10 parts of high imino group melamine resin, 25 parts of sulfonated polybenzoxazine epoxy resin blend and 2 parts of pigment according to parts by mass, adding proper deionized water, and uniformly stirring.
Comparative example 4:
CN108467648B discloses a method for preparing coating.
TABLE 1
| Curing temperature/. degree.C | Elongation/percent | |
| Example 1 | 160 | 20.6 |
| Example 2 | 170 | 26.1 |
| Example 3 | 165 | 22.5 |
| Comparative example 1 | 190 | 24.2 |
| Comparative example 2 | 195 | 20.2 |
| Comparative example 3 | 170 | 10.5 |
| Comparative example 4 | 190 | 8.9 |
As can be seen from the table, in examples 1 to 3, compared with comparative examples 1, 2 or 4, respectively, the curing temperature of 20 to 40 ℃ can be reduced by adding the high imino melamine resin or the sulfonated polybenzoxazine epoxy resin blend. Compared with the examples 1-3 and the comparative examples 1-2, the silver-plated glass fiber modified acrylic resin is not added in the comparative examples 3 and 4, so that the paint film is brittle, the extensibility is poor, and the stability in the transportation process is poor.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (6)
1. A low-temperature curing water-soluble acrylic resin coating is characterized in that: comprises silver-plated glass fiber modified acrylic resin, pigment, epoxy resin, sulfonated polybenzoxazine resin and high imino melamine resin.
2. The low-temperature-curable water-soluble acrylic resin coating according to claim 1, wherein the coating comprises the following components in parts by mass
30-50 parts of sulfonated polybenzoxazine resin;
1-5 parts of pigment;
10-20 parts of silver-plated glass fiber modified acrylic resin;
1-2 parts of epoxy resin;
15-25 parts of high imino melamine resin.
3. The low-temperature curing water-soluble acrylic resin coating as claimed in claim 2, wherein the high imino group melamine resin is mixed etherified high imino group melamine resin, wherein the mass ratio of the methylated melamine resin, the butylated melamine resin and the phosphate modified melamine resin is 1: 0.5-1.5: 0.3 to 0.5.
4. The low-temperature curing water-soluble acrylic resin coating according to claim 2, wherein the coating preparation method comprises the following steps:
firstly, preparing silver-plated glass fiber modified acrylic resin:
step 1: uniformly mixing 10-15 parts of methacrylic acid monomer, 5-10 parts of acrylic acid monomer, 3-4 parts of isooctyl methacrylate, 6-9 parts of n-butyl acrylate, 5-8 parts of methyl methacrylate, 1-3 parts of styrene and 2-3 parts of aromatic polycarbonate;
step 2: taking 10-15 parts of a base material which is prepared by taking n-butyl alcohol, isopropanol and deionized water in a ratio of 1:1: 8-10, heating to 80-100 ℃, dropwise adding the mixed monomer solution prepared in the step 1 into a reaction container for 2-3 hours, slowly dropwise adding an initiator, keeping the temperature of the reaction container for 2.5-4 hours, and then sequentially adding a neutralizing agent and an antifoaming agent;
and step 3: cooling the reaction to below 60 ℃, adding 5-10 parts of silver-plated glass fiber and 0.1-0.5 part of coupling agent into the reaction, and carrying out ultrasonic treatment for 1-2 hours to obtain silver-plated glass fiber modified acrylic resin;
high imino melamine resin:
methyl etherified melamine resin, butylated melamine resin and phosphate modified melamine resin are mixed according to the proportion of 1: 0.5-1.5: 0.3-0.5, and uniformly mixing for later use;
preparation of sulfonated polybenzoxazine epoxy resin blend:
dissolving 1mol of benzidine disulfonic acid and 2mol of 3-pentadecylphenol in excessive formaldehyde to generate sulfonated polybenzoxazine, mixing with proper amount of lignin, and mixing the materials in a mass ratio of 10: 1, uniformly mixing the sulfonated polybenzoxazine and the epoxy resin;
preparation of the coating:
the silver-plated glass fiber modified acrylic resin, the high imino group melamine resin, the sulfonated polybenzoxazine epoxy resin blend and the pigment are mixed according to the mass parts, and proper deionized water is added to be uniformly stirred.
5. The low-temperature curing water-soluble acrylic resin coating according to claim 4, wherein the silver-plated glass fiber is prepared by the following steps:
s1 sensitization and activation: adding Sn Cl into glass fiber with the diameter of 25 mu m and the length of 5 cm220 g/L of hydrochloric acid, 80 mL/L of hydrochloric acid, ultrasonic stirring for 20 min at 30 ℃, and glass fiber loading of 5 g/L; adding Ag NO after washing with deionized water3 0.5g/L，NH3·H2O40 mL/L, ultrasonically stirring for 10 min at 30 ℃, cleaning with deionized water, and drying for later use;
s2 silver plating: AgNO3 5-10 g/L, 5-15 g/L glucose, C2H5OH 60~100g/L，NH3·H2100 mL/L of O, 3-6 g/L of NaOH, 1.0-1.5 mg/L of KI, 20 g/L of glass fiber loading capacity, 15-45 ℃, ultrasonic stirring for 10-15 min, and plating silver on the surface of the glass fiber in a rough manner.
6. The low-temperature-curable water-soluble acrylic resin coating according to claim 4, wherein the coupling agent is an aliphatic urethane acrylate with isocyanate.
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| CN202111560993.4A CN114316726A (en) | 2021-12-20 | 2021-12-20 | Low-temperature curing water-soluble acrylic resin coating |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557487A (en) * | 2010-12-23 | 2012-07-11 | 上海杰事杰新材料(集团)股份有限公司 | Silver-coated glass fiber and preparation method of silver-coated glass fiber |
| CN104254567A (en) * | 2012-04-25 | 2014-12-31 | 汉高股份有限及两合公司 | Curable resin composition, cured product and method of producing a cured product |
-
2021
- 2021-12-20 CN CN202111560993.4A patent/CN114316726A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557487A (en) * | 2010-12-23 | 2012-07-11 | 上海杰事杰新材料(集团)股份有限公司 | Silver-coated glass fiber and preparation method of silver-coated glass fiber |
| CN104254567A (en) * | 2012-04-25 | 2014-12-31 | 汉高股份有限及两合公司 | Curable resin composition, cured product and method of producing a cured product |
Non-Patent Citations (1)
| Title |
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| 姚炳建等: ""甲醇染料电池用磺化苯并噁嗪树脂的合成与性能研究"", 《主题D高性能高分子材料》 * |
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