CN107858078B - Epoxy woodware sealing agent and preparation method and application thereof - Google Patents
Epoxy woodware sealing agent and preparation method and application thereof Download PDFInfo
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- CN107858078B CN107858078B CN201711326790.2A CN201711326790A CN107858078B CN 107858078 B CN107858078 B CN 107858078B CN 201711326790 A CN201711326790 A CN 201711326790A CN 107858078 B CN107858078 B CN 107858078B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the field of high polymer materials, in particular to an epoxy woodware sealing agent which comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight: 49-56% of nonionic aqueous epoxy emulsion; 16-19% of epoxy-acrylic emulsion; 3.2 to 8.7 percent of assistant A; 16.3 to 31.8 percent of water; the mass ratio of the nonionic aqueous epoxy emulsion to the epoxy-acrylic emulsion is 3: 0.8-1.2; the mass percentage of each component of the component A is 100 percent; the component B comprises the following components in percentage by mass: 14.8 to 24.6 percent of water; 75-85% of water-based epoxy curing agent; 0.2 to 0.4 percent of assistant B; the mass percentage of each component of the component B is 100 percent. The sealant has excellent sealing effect, better rib expansion prevention effect, compact paint film formation, wood hardness enhancement by turning, no influence on subsequent construction adhesion of water-based paint, no organic solvent, low VOC (volatile organic compound) emission and more environmental protection. The invention also discloses a preparation method and application of the sealant.
Description
Technical Field
The invention relates to the field of high polymer materials, and in particular relates to an epoxy woodware sealing agent and a preparation method and application thereof.
Background
With the popularization of the water-based wood paint, the concept of environmental protection becomes an important standard for people to choose furniture and home furnishings. In recent years, the furniture material is mainly solid wood, and the application of the water-based wood paint to the solid wood also has some problems, such as unsatisfactory sealing effect of part of the water-based wood paint and incapability of sealing grease and tannic acid; the solid wood with multiple fibers and wood ribs is difficult to treat, and the rib expansion phenomenon is easy to occur; part of solid wood is soft, the hardness of the water-based wood paint is generally higher than that of the oil paint, and a paint film and wood are easy to collapse simultaneously after collision, so that the appearance is influenced.
Disclosure of Invention
The invention mainly aims to solve the technical problem of providing the epoxy woodware sealing agent, which overcomes the defects of the prior art, has excellent sealing effect, better rib expansion prevention effect, forms a compact paint film, changes direction to enhance the hardness of wood, does not influence the subsequent construction adhesion of water-based paint, has no organic solvent, has low VOC (volatile organic compound) emission and is more environment-friendly.
The technical scheme of the invention is as follows:
an epoxy woodware sealing agent comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight:
49-56% of nonionic aqueous epoxy emulsion;
16-19% of epoxy-acrylic emulsion;
3.2 to 8.7 percent of assistant A;
16.3 to 31.8 percent of water;
the mass ratio of the nonionic aqueous epoxy emulsion to the epoxy-acrylic emulsion is 3: 0.8-1.2;
the non-ionic water-based epoxy emulsion has the epoxy equivalent of 185-215g/Eq and the solid content of 60 percent, and preferably Epikote3510-W-60A produced by Vast America;
the mass percentage of each component of the component A is 100 percent.
The component B comprises the following components in percentage by mass:
14.8 to 24.6 percent of water;
75-85% of water-based epoxy curing agent;
0.2 to 0.4 percent of assistant B; the auxiliary agent B is preferably an antifoaming agent;
the mass percentage of each component of the component B is 100 percent.
Further, the 3.2-8.7 wt% of the assistant A comprises the following components:
0.1 to 0.3 percent of pH regulator;
0.2 to 0.4 percent of defoaming agent;
2-5% of a filler;
0.5 to 2 percent of thickening agent;
0.2 to 0.5 percent of flatting agent;
0.2 to 0.5 percent of wetting agent. The leveling agent is polyether modified polydimethylsiloxane leveling agent, preferably BYK-306 produced by Germany Bike. The wetting agent is a polysiloxane-polyether copolymer, preferably german digao 450, and the like.
Furthermore, the epoxy-acrylic emulsion is an aqueous dispersion which takes epoxy resin as a main component and is modified by polyacrylate. Aqueous dispersions modified with polyacrylates, preferably 3240 for new materials of Anhui legends.
Furthermore, the waterborne epoxy curing agent is a waterborne amine curing agent. The amine curing agent is hydrated by a series of chemical modification methods, has excellent compatibility with epoxy resin and longer pot life, and is preferably H208B of Shanghai Hanzhong chemical engineering.
Further, the pH regulator is a multifunctional amine assistant. AMP-95 produced by Dow, USA is preferred.
Further, the defoaming agent is a defoaming polymer solution without organic silicon. BYK-055, produced by bike, Germany, is preferred.
Further, the filler is zinc stearate.
Further, the thickening agent is organic modified bentonite. EW from Haimines is preferred.
The preparation method of the epoxy woodware sealing agent comprises the following steps:
the preparation method of the component A comprises the following steps:
A. sequentially adding the aqueous epoxy emulsion, the epoxy-acrylic emulsion, the pH regulator, the thickening agent and the defoaming agent in the component A into a dispersion cylinder, and stirring and dispersing at a high speed for 10-20 minutes until the viscosity of the emulsion is obviously increased;
B. adding the filler into the mixture obtained in the step A in sequence, and stirring and dispersing for 10-15 minutes until the fineness is less than or equal to 50 mu m;
C. adding a flatting agent, a wetting agent and water into the mixture obtained in the step B, adjusting the viscosity of the mixture to 155s-180s (viscosity is measured by a Chuanyn cup at 25 ℃), stirring and dispersing at medium speed for 5-10 minutes until the mixture is uniform, filtering and packaging;
the preparation method of the component B comprises the following steps:
and sequentially adding the component B, namely the waterborne epoxy curing agent and the defoaming agent into the dispersion cylinder, stirring and dispersing the water uniformly, filtering and packaging.
The application method of the epoxy woodenware sealing agent comprises the following steps: the component A and the component B are mixed according to the proportion of 1: uniformly mixing the components in a mass ratio of 0.2-0.4, and then performing subsequent construction. Namely, after a certain amount of water is added and the proper construction viscosity is adjusted, construction can be carried out, and a paint film with excellent physicochemical properties and decorative properties can be obtained after drying.
Compared with the prior art, the invention is characterized in that:
the non-ionic waterborne epoxy emulsion is selected to replace the original epoxy resin, the viscosity of a film forming substance is not required to be reduced by adding an organic solvent, the organic solvent is not used, the VOC emission is low, the environment is protected, the epoxy resin is not required to be emulsified to make the epoxy resin hydrophilic, and the system is more stable. Meanwhile, the non-ionic epoxy emulsion has better alkali resistance than the ionic epoxy emulsion, better storage stability in a water-based slightly-alkaline system and excellent mechanical property.
The sealant system is matched with the epoxy-acrylic emulsion, so that the curing reaction of the water-based epoxy emulsion can be accelerated, and the surface drying speed is improved. Controlling the water-based epoxy emulsion: the mass ratio of the epoxy-acrylic emulsion is 3: 1, the coating can achieve better drying speed and film-forming hardness, and can obtain compact film coating effect by spraying or brushing on the wood, has excellent sealing effect, can effectively fix fibers and wood ribs on the surface of the wood, and does not generate rib expansion after polishing. After sufficient exothermic reaction, the paint film can reach the pencil hardness of 1H-2H, a high-hardness transition layer is established between the wood surface and the water-based wood paint, and the hardness of the wood is enhanced in a turning way.
Detailed Description
The present invention will be described in more detail with reference to examples. The examples are only preferred embodiments of the present invention and are not intended to limit the present invention.
The nonionic waterborne epoxy emulsion used in this example was Epikote3510-W-60A, the epoxy-acrylic emulsion was 3240 of a new Anhui legend material, the defoamer was BYK-055, the thickener was EW produced by Hamming, the leveling agent was BYK-306, the wetting agent was German Digao 450, the waterborne epoxy hardener was H208B, and the pH adjuster was AMP-95 produced by Dow. The code of the relevant substance is a product code of a manufacturer or a commercially available product, and is specifically described.
Example 1
Preparing a component A: weighing 100kg of the following components in percentage by mass: 52kg of waterborne epoxy emulsion, 18kg of epoxy-acrylic emulsion, 0.2kg of pH regulator, 0.3kg of defoamer, 2kg of filler, 1.2kg of thickener, 0.3kg of flatting agent, 0.4kg of wetting agent and 25.5kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
A. sequentially adding the aqueous epoxy emulsion, the epoxy-acrylic emulsion, the pH regulator, the thickening agent and the defoaming agent in the component A into a dispersion cylinder, and stirring and dispersing at a high speed for 10 minutes until the viscosity of the emulsion is obviously increased;
B. sequentially adding the filler in the step A, stirring and dispersing for 10-15 minutes until the fineness is less than or equal to 50 mu m;
C. and C, adding a leveling agent, a wetting agent and water in the step B to enable the viscosity of the sealing agent to reach 155s-180s, stirring at a medium speed for 5 minutes until the sealing agent is uniform, filtering and packaging.
Preparing a component B: weighing 100kg of the following components in percentage by mass: 80kg of waterborne epoxy curing agent, 0.2kg of defoaming agent and 19.8kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
and sequentially adding the component B, namely the waterborne epoxy curing agent and the defoaming agent into the dispersion cylinder, stirring and dispersing the water uniformly, and filtering and packaging.
When coating, the component A and the component B curing agent are fully stirred and uniformly mixed, and then water is added, wherein the component A, the component B and the water are mixed according to the mass ratio of 1: 0.25: 0.1-0.2; and (3) adjusting the viscosity of the mixed sealing agent to 20-30s, uniformly mixing, spraying the mixture on the surface of the woodware, and naturally drying or baking the mixture at low temperature for 4 hours.
Example 2
Preparing a component A: weighing 100kg of the following components in percentage by mass: 56kg of aqueous epoxy emulsion, 19kg of epoxy-acrylic emulsion, 0.2kg of pH regulator, 0.2kg of defoamer, 4kg of filler, 0.8kg of thickener, 0.3kg of flatting agent, 0.5kg of wetting agent and 19kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
A. sequentially adding the aqueous epoxy emulsion, the epoxy-acrylic emulsion, the pH regulator, the thickening agent and the defoaming agent in the component A into a dispersion cylinder, and stirring and dispersing at a high speed for 10 minutes until the viscosity of the emulsion is obviously increased;
B. sequentially adding the filler in the step A, stirring and dispersing for 10-15 minutes until the fineness is less than or equal to 50 mu m;
C. and C, adding a leveling agent, a wetting agent and water in the step B to enable the viscosity of the sealing agent to reach 155s-180s, stirring at a medium speed for 5 minutes until the sealing agent is uniform, filtering and packaging.
Preparing a component B: weighing 100kg of the following components in percentage by mass: 75kg of waterborne epoxy curing agent, 0.2kg of defoaming agent and 24.8kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
and sequentially adding the component B, namely the waterborne epoxy curing agent and the defoaming agent into the dispersion cylinder, stirring and dispersing the water uniformly, and filtering and packaging.
When coating, the component A and the component B curing agent are fully stirred and uniformly mixed, and then water is added, wherein the component A, the component B and the water are mixed according to the mass ratio of 1: 0.2: 0.1-0.2; and (3) adjusting the viscosity of the mixed sealing agent to 20-30s, uniformly mixing, spraying the mixture on the surface of the woodware, and naturally drying or baking the mixture at low temperature for 4 hours.
Example 3
Preparing a component A: weighing 100kg of the following components in percentage by mass: 49kg of aqueous epoxy emulsion, 16kg of epoxy-acrylic emulsion, 0.2kg of pH regulator, 0.2kg of defoamer, 3kg of filler, 1.5kg of thickener, 0.3kg of flatting agent, 0.5kg of wetting agent and 29.3kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
A. sequentially adding the aqueous epoxy emulsion, the epoxy-acrylic emulsion, the pH regulator, the thickening agent and the defoaming agent in the component A into a dispersion cylinder, and stirring and dispersing at a high speed for 10 minutes until the viscosity of the emulsion is obviously increased;
B. sequentially adding the filler in the step A, stirring and dispersing for 10-15 minutes until the fineness is less than or equal to 50 mu m;
C. and C, adding a leveling agent, a wetting agent and water in the step B to enable the viscosity of the sealing agent to reach 155s-180s, stirring at a medium speed for 5 minutes until the sealing agent is uniform, filtering and packaging.
Preparing a component B: weighing 100kg of the following components in percentage by mass: 85kg of waterborne epoxy curing agent, 0.2kg of defoaming agent and 14.8kg of water are weighed.
The preparation method comprises the following steps of weighing the raw materials according to the mass components:
and sequentially adding the component B, namely the waterborne epoxy curing agent and the defoaming agent into the dispersion cylinder, stirring and dispersing the water uniformly, and filtering and packaging.
When coating, the component A and the component B curing agent are fully stirred and uniformly mixed, and then water is added, wherein the component A, the component B and the water are mixed according to the mass ratio of 1: 0.3: 0.1-0.2; and (3) adjusting the viscosity of the mixed sealing agent to 20-30s, uniformly mixing, spraying the mixture on the surface of the woodware, and naturally drying or baking the mixture at low temperature for 4 hours.
The above examples are compared with the common water-based two-component seal primer on the market, and the relevant experimental results are as follows:
the test results of examples 1 to 3 and comparative example are shown in Table 1
Table 1:
in conclusion, the test results show that the epoxy wood sealer provided by the invention solves the problems of poor sealing performance, poor expansion prevention and the like of the sealing primer, enables the coating film to have higher hardness than that of the conventional water-based paint, establishes a high-hardness transition layer between the wood surface and the water-based wood paint, and does not influence the subsequent coating of the water-based paint.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (9)
1. The epoxy woodware sealing agent comprises a component A and a component B, and is characterized in that the component A comprises the following components in percentage by weight:
49-56% of nonionic aqueous epoxy emulsion;
16-19% of epoxy-acrylic emulsion;
3.2 to 8.7 percent of assistant A;
16.3 to 31.8 percent of water;
the mass ratio of the nonionic aqueous epoxy emulsion to the epoxy-acrylic emulsion is 3: 0.8-1.2;
the mass percentage of each component of the component A is 100 percent;
the component B comprises the following components in percentage by mass:
14.8 to 24.6 percent of water;
75-85% of water-based epoxy curing agent;
0.2 to 0.4 percent of assistant B;
the mass percentage of each component of the component B is 100 percent;
wherein, the epoxy-acrylic emulsion is an aqueous dispersion which takes epoxy resin as a main component and is modified by polyacrylate.
2. The epoxy woodenware sealant according to claim 1, wherein the 3.2-8.7 wt% of the additive A comprises the following components:
0.1 to 0.3 percent of pH regulator;
0.2 to 0.4 percent of defoaming agent;
2-5% of a filler;
0.5 to 2 percent of thickening agent;
0.2 to 0.5 percent of flatting agent;
0.2 to 0.5 percent of wetting agent;
and the auxiliary agent B is a defoaming agent.
3. The epoxy wood sealer according to claim 1 or 2, wherein the water-based epoxy curing agent is a water-based amine curing agent.
4. The epoxy wood sealer according to claim 2, wherein the pH regulator is a multifunctional amine adjuvant.
5. The epoxy wood sealer according to claim 2, wherein the defoamer is a silicone-free defoaming polymer solution.
6. The epoxy woodenware sealant according to claim 2, characterized in that the filler is zinc stearate.
7. The epoxy wood sealer according to claim 2, wherein the thickener is organically modified bentonite.
8. A method for preparing the epoxy woodenware sealing agent according to claim 2, which is characterized by comprising the following steps:
the preparation method of the component A comprises the following steps:
A. sequentially adding the aqueous epoxy emulsion, the epoxy-acrylic emulsion, the pH regulator, the thickening agent and the defoaming agent in the component A into a dispersion cylinder, and stirring and dispersing at a high speed for 10-20 minutes until the viscosity of the emulsion is 4000-6000cp at 25 ℃;
B. adding the filler into the mixture obtained in the step A in sequence, and stirring and dispersing for 10-15 minutes until the fineness is less than or equal to 50 mu m;
C. adding a flatting agent, a wetting agent and water into the mixture obtained in the step B, adjusting the viscosity of the mixture to 155s-180s, stirring and dispersing at a medium speed for 5-10 minutes until the mixture is uniform, filtering and packaging;
the preparation method of the component B comprises the following steps:
and sequentially adding the component B, namely the waterborne epoxy curing agent and the defoaming agent into the dispersion cylinder, stirring and dispersing the water uniformly, filtering and packaging.
9. An application method of the epoxy woodenware sealing agent as claimed in claim 1 or 2, characterized by comprising the following steps: the component A and the component B are mixed according to the proportion of 1: uniformly mixing the components in a mass ratio of 0.2-0.4, and then performing subsequent construction.
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| CN108641573A (en) * | 2018-04-20 | 2018-10-12 | 河北晨阳工贸集团有限公司 | A kind of sealer and preparation method thereof with the efficiently anti-muscle energy that rises |
| CN110041795A (en) * | 2019-03-22 | 2019-07-23 | 河北晨阳工贸集团有限公司 | A kind of water-base epoxy priming paint and preparation method thereof |
| CN111004559A (en) * | 2019-12-23 | 2020-04-14 | 东莞市涂芭新材料有限公司 | Waterborne epoxy woodware primer coating coated on wood and preparation method thereof |
| CN111205737B (en) * | 2020-03-04 | 2022-07-22 | 广东华润涂料有限公司 | Double-component water-based woodware sealing primer |
| CN112680069B (en) * | 2020-12-14 | 2022-09-13 | 成都展辰涂料有限公司 | Waterborne two-component epoxy woodware coating for sealing tannic acid and high grease and preparation method thereof |
| CN114539881A (en) * | 2022-03-08 | 2022-05-27 | 锦益得节能环保科技(山东)有限公司 | Water-based epoxy alkali-resistant seal primer |
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| CN101429267B (en) * | 2008-12-25 | 2010-09-22 | 海洋化工研究院 | Preparation and uses of epoxy/acrylic acid hybridisation emulsion |
| CN101831225A (en) * | 2010-04-15 | 2010-09-15 | 林玉财 | Low-carbon environmental-friendly aqueous wood lacquer with double components |
| CN102675530A (en) * | 2012-04-23 | 2012-09-19 | 上海中新裕祥化工有限公司 | Novel aqueous acrylic acid modified alicyclic epoxy emulsion and preparation method thereof |
| CN103642342B (en) * | 2013-12-06 | 2015-11-25 | 叶氏化工研发（上海）有限公司 | A kind of impervious look aqueous wooden ware seal coat |
| CN106221506B (en) * | 2016-08-30 | 2017-06-30 | 河北晨阳工贸集团有限公司 | A kind of epoxy emulsion and preparation method thereof |
| CN106833272A (en) * | 2017-02-07 | 2017-06-13 | 沈阳百辰化学科技有限公司 | A kind of high-strength tasteless abrasion proof pure water-base epoxy paint and preparation method thereof |
| CN107459893A (en) * | 2017-08-03 | 2017-12-12 | 合肥隆延科技有限公司 | Antibacterial aqueous woodwork coating |
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