CN111171696A - Water-based double-component matte white finish and preparation method thereof - Google Patents
Water-based double-component matte white finish and preparation method thereof Download PDFInfo
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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Abstract
The invention discloses a water-based double-component matte white finish and a preparation method thereof, and relates to the technical field of water-based coatings. The technical key points are as follows: the water-based double-component matte white finish comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: hydroxy acrylic resin: 15-40 parts; polyurethane: 15-40 parts; amine neutralizer: 0.3-0.8 part; wetting agent: 0.1-0.5 part; defoaming agent: 0.5-1 part; film-forming auxiliary agent: 2-6 parts; thickening agent: 0.2-0.6 part; a flatting agent: 0.5-1 part; white pulp: 25-30 parts; wax auxiliary agent: 1-3 parts of preservative: 0.05-0.1 part; water: 5-10 parts; the component B comprises the following components in parts by weight: HDI: 32-64 parts; IPDI: 20-60 parts; PGDA: 7-15 parts; dehydrating agent: 0.1 to 0.5 portion. The water-based double-component matte white finish prepared by adopting the formula has the advantages of long service life and recycling.
Description
Technical Field
The invention relates to the technical field of water-based coatings, in particular to a water-based double-component matte white finish and a preparation method thereof.
Background
At present, the oil-to-water process of large furniture enterprises is mainly divided into the following categories: the first type is furniture enterprises mainly customizing the rear end of furniture, basically takes water-based two-component primer and water-based two-component finish paint as main processes, and the construction mode mainly takes diaphragm pump spraying as a main mode; the second type is furniture enterprises mainly comprising plate furniture and wooden doors, the common process is UV primer and water-based finish paint, and the construction mode mainly comprises mechanical spraying such as reciprocating spraying; the third category is furniture enterprises mainly made of bamboo products and pine wood, the common process is water-based single-component base paint and water-based single-component finish paint, and the construction mode is mainly electrostatic spraying equipment.
The invention mainly provides the water-based bi-component matte white finish which is suitable for spraying by a reciprocating machine for furniture enterprises mainly including second-class plate-type furniture and wooden doors. At present, the furniture enterprises mainly adopt a process of roller coating UV primer and water-based single-component white finish as main materials, the process has the biggest problems that the performance of the single-component finish cannot meet the requirements of customers, and the main surface is easy to have risks of bubbling, delaminating and the like in a later period of high humidity. The tests of mechanical spraying construction, surface effect and the like are broken through by replacing water-based bi-component finish paint in part of the existing enterprises.
The water-based bi-component finish paint mainly comprises two parts, namely-OH-containing resin and-NCO-containing curing agent, belongs to a reaction type drying mode, and finally reacts with-NCO and-OH to form a hardened paint film along with the change of time and temperature. The period from paint mixing to hardening is called activation period, the viscosity of the finish paint is continuously increased in the activation period, and the period when the viscosity is increased to be incapable of being sprayed or the spraying effect is obviously reduced is called usable time. The in-industry evaluation of the service life means that the viscosity of the paint with the constant temperature of 35 ℃ is measured every 1h after the paint is prepared and cured, the state is observed, and the service life of the water-based double-component finishing paint on the market at present is between 2 and 3 h.
The spraying working principle of the reciprocating engine is that a workpiece is conveyed into the reciprocating engine on a conveyor belt, the high-pressure nozzle starts to spray the workpiece in a reciprocating mode after sensing the workpiece, paint sprayed on a crawler belt of the reciprocating engine is scraped off by a scraper when the paint is conveyed to the lower portion of the crawler belt of the reciprocating engine, and the paint is collected and recycled. In the process, the film-forming assistant and water sprayed and atomized in the paint film on the caterpillar track are quickly volatilized, the viscosity is rapidly increased, and the process of accelerating gelatinization is carried out, while the water-based double-component finish paint on the market cannot be recycled in a reciprocating cycle manner like single-component finish paint, so that the aim of saving the water paint while realizing high-efficiency spraying by the reciprocating machine equipment of a client can not be really fulfilled.
Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water-based double-component white finish paint which has the advantages of long service life and recycling.
The second purpose of the invention is to provide a preparation method of the water-based bi-component white finish, which has the advantages of simple operation and suitability for large-scale production and use.
In order to achieve the first purpose, the invention provides the following technical scheme:
the water-based double-component matte white finish comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:
hydroxy acrylic resin: 15-40 parts;
polyurethane: 15-40 parts;
amine neutralizer: 0.3-0.8 part;
wetting agent: 0.1-0.5 part;
defoaming agent: 0.5-1 part;
film-forming auxiliary agent: 2-6 parts;
thickening agent: 0.2-0.6 part;
a flatting agent: 0.5-1 part;
white pulp: 25-30 parts;
wax auxiliary agent: 1-3 parts of preservative: 0.05-0.1 part;
water: 5-10 parts;
the component B comprises the following components in parts by weight:
HDI: 32-64 parts;
IPDI: 20-60 parts;
PGDA: 7-15 parts;
dehydrating agent: 0.1 to 0.5 portion.
By adopting the technical scheme, the low-hydroxyl resin with long service life is adopted as the raw material and is compounded with the polyurethane resin for use, and the prepared finish paint has the advantage of long service life and can meet the requirement of recycling.
The existing curing agent mainly takes HDI as a main component, polyether modification and sulfonate modification are only slight differences of compatibility and tolerance, the usable time is not obviously improved, the HDI type curing agent is adopted to be compounded with the IPDI type curing agent for use, and compared with PMA, DMM, PDGA and EDGA commonly used in the market, the compounded curing agent has lower reaction activity and longer usable time.
The core of the formula in the invention is simplification, namely, a small amount of auxiliary agent is added as much as possible to reduce the influence on the usable time, and the obtained coating has good viscosity and excellent paint film performance.
More preferably, the hydroxyl group content of the hydroxyl acrylic resin is 1.5 to 3.9%.
By adopting the technical scheme, the hydroxyl acrylic resin with different hydroxyl contents and the polyurethane resin are compounded for use and then react with the curing agent, so that the finish paint with excellent performances in all aspects can be obtained.
More preferably, the film-forming aid is a combination of DPM and EDG, and the dosage ratio of the DPM to the EDG is 1: 1.
By adopting the technical scheme, in the aqueous bi-component formula, the influence of the cosolvent on the usable time is very large. The invention adopts the DPM and the EDG to carry out compound use, and strictly controls the dosage ratio, the obtained film-forming additive can prolong the service life of the coating to a greater extent, and the viscosity stability of the obtained coating is also best.
More preferably, the matting agent is fumed silica.
By adopting the technical scheme, the extinction powder has a larger influence on the usable time in a two-component system, common extinction agents comprise fumed silica, PMMA organic resin type and polymethyl urea resin powder, and compared with the other two extinction agents, the extinction agent has the advantages that the fumed silica has a smaller influence on the usable time, the influence on the viscosity of the system in the usable time is minimum, and the extinction agent is obviously superior to the other two extinction agents.
More preferably, the wax assistant is one of a microcrystalline wax emulsion, a carnauba wax emulsion, and a polyethylene wax emulsion.
By adopting the technical scheme, the microcrystalline wax emulsion has the characteristics of small hardness, good toughness, tendency to plastic flow under stress, large extensibility and good coverage, does not need to be heated and melted or dissolved by using a solvent when in use, has uniform film formation and good coverage, is easy to be used with other emulsions in a formula in a composite way, is better used for an aqueous system, and reduces the use of a volatile agent organic solvent; the carnauba wax emulsion and the polyethylene wax emulsion used for the water-based varnish have the characteristics of acid resistance, alkali resistance, hard water resistance, strong water solubility and stable emulsion, and can not be layered, demulsified and agglomerated after being diluted by water in any proportion, have long shelf life, high solid content and good dispersibility.
Further preferably, the amine neutralizer is AMP-95, the wetting agent is BYK-346, and the preservative is DOW 342.
By adopting the technical scheme, the amine neutralizer AMP-95 has low odor and volatility, and has the advantages of stable pH value regulation, promotion of gloss display of a paint film and improvement of in-tank corrosion resistance; the wetting agent BYK-346 has excellent wetting and dispersing performance, enhances the emulsification effect in a pre-dispersing system, effectively reduces the flooding and the floating phenomena of the colored paint, and improves the color development, namely the stability of the colored paint; the preservative DOW342 can ensure that the paint is not invaded by bacteria and algae, inhibit the corrosion-causing microorganisms of the paint and prevent the paint from demulsifying and deteriorating.
More preferably, DEFEN DF-8205 is adopted as the defoaming agent, and L-1084 is adopted as the thickening agent.
By adopting the technical scheme, the DEFEN DF-8205 is a composite defoaming agent without organic silicon, and has good foam inhibition durability, good dispersibility and strong defoaming capability; the thickener L-1084 can better control the fluidity of the coating, improve the storage stability of the coating and prevent the coating from sagging when the coating is coated on the surface of a vertical object.
In order to achieve the second purpose, the invention provides the following technical scheme:
a preparation method of a water-based bi-component matte white finish paint is disclosed, wherein the component A is obtained by the following preparation steps:
s1, putting the hydroxyl acrylic resin and the polyurethane in corresponding parts by weight into a dispersion cylinder, and dispersing for 5-10min at the rotating speed of 400-600 rpm;
s2, putting the amine neutralizer, the wetting agent and the defoaming agent in corresponding parts by weight into the dispersion tank in the step S1, increasing the rotating speed to 600-800rpm, dispersing for 5-10min, adding the film-forming assistant and the thickening agent, and continuing to disperse for 5-10 min;
s3, reducing the rotating speed to 300-400rpm, adding a flatting agent, increasing the rotating speed to 1000-1200rpm, dispersing at high speed for 30min, scraping glass without shrinkage cavity, and making the fineness of a fineness plate less than 30 μm;
s4, reducing the rotating speed to 600-800rpm, sequentially adding white pulp, wax auxiliary agent and preservative, and dispersing for 10-15min to obtain the product; the component B is obtained by the following preparation steps:
mixing PGDA and dehydrating agent, dehydrating thoroughly, adding the HDI and IPDI premix, charging nitrogen gas into dispersion cylinder, discharging the mixed curing agent, and sealing immediately for later use.
By adopting the technical scheme, the finish paint prepared by the preparation method has good dispersibility, stable film-forming property, long service life and good viscosity stability, and the preparation method does not involve heating and other conditions, is simple to operate and is suitable for large-scale production and use.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the low-hydroxyl resin with long service life is used as a raw material and is compounded with the polyurethane resin for use, so that the prepared finish paint has the advantage of long service life and can meet the requirement of recycling; the HDI type curing agent is compounded with the IPDI type curing agent for use, and compared with PMA, DMM, PDGA and EDGA commonly used in the market, the HDI type curing agent has lower reaction activity and longer service life;
(2) according to the invention, the hydroxyl acrylic resin with different hydroxyl contents and the polyurethane resin are compounded and used, and then the compound is reacted with the curing agent, so that the finish paint with excellent performances in all aspects can be obtained; according to the invention, DPM and EDG are compounded for use, and the dosage ratio is strictly controlled, so that the obtained film-forming additive can prolong the service life of the coating to a greater extent, and the viscosity stability of the obtained coating is also the best;
(3) the invention also provides a preparation method of the water-based double-component matte white finish, the finish prepared by the method has good dispersibility, stable film-forming property, long service life and good viscosity stability, and the preparation method does not involve heating and other conditions, is simple to operate and is suitable for large-scale production and use.
Drawings
FIG. 1 is a flow chart of the process for preparing the A component in example 1 of the present invention.
Detailed Description
The invention will be described in detail below with reference to fig. 1 and an embodiment.
Example 1: the water-based double-component matte white finish comprises the following components in parts by weight as shown in Table 1, wherein the component A is prepared by the following steps:
s1, putting the hydroxyl acrylic resin and the polyurethane into a dispersion cylinder according to the corresponding weight parts in the table 1, and dispersing for 5min at the rotating speed of 400 rpm;
s2, putting the amine neutralizer, the wetting agent and the defoaming agent in corresponding parts by weight into the dispersion tank in the step S1, increasing the rotating speed to 600rpm, dispersing for 5min, adding the film-forming assistant and the thickening agent, and continuing to disperse for 5 min;
s3, reducing the rotating speed to 300rpm, adding a flatting agent, increasing the rotating speed to 1000rpm, dispersing at high speed for 30min, scraping glass without shrinkage cavity, and ensuring that the fineness of a fineness plate is less than 30 mu m;
and S4, reducing the rotating speed to 600rpm, sequentially adding the white pulp, the wax assistant and the preservative, and dispersing for 10min to obtain the product.
Wherein the component B is obtained by the following preparation steps:
mixing PGDA and dehydrating agent, dehydrating thoroughly, adding the HDI and IPDI premix, charging nitrogen gas into dispersion cylinder, discharging the mixed curing agent, and sealing immediately for later use.
When in use, the obtained component A and the component B are fully and uniformly mixed.
Wherein, the hydroxyl content of the hydroxyl acrylic resin is 1.5 percent;
the film-forming assistant is a composition of DPM and EDG, and the dosage ratio of the DPM to the EDG is 1: 1;
the flatting agent adopts fumed silica;
the wax auxiliary agent adopts microcrystalline wax emulsion;
the amine neutralizer is AMP-95;
the wetting agent adopts BYK-346;
the preservative adopts DOW 342;
the defoaming agent adopts DEFEN DF-8205;
the thickening agent adopts L-1084;
the dehydrating agent adopts BF5 of Samsung chemical industry.
Examples 2 to 6: the difference between the water-based double-component matte white finish and the example 1 is that the components and the corresponding parts by weight are shown in the table 1.
TABLE 1 Components and parts by weight of examples 1-6
Example 7: a water-based double-component matte white finish is different from the water-based double-component matte white finish in example 1 in that the hydroxyl content of the hydroxyl acrylic resin in the component A is 3.9 percent.
Example 8: an aqueous two-component matte white finish differs from example 1 in that the wax adjuvant in component a is a carnauba wax emulsion.
Example 9: the difference between the water-based double-component matte white finish and the embodiment 1 is that the wax additive in the component A adopts polyethylene wax emulsion.
Example 10: an aqueous two-component matte white finish, which differs from example 1 in that the component A is obtained by the following preparation steps:
s1, putting the hydroxyl acrylic resin and the polyurethane into a dispersion cylinder according to the corresponding parts by weight of the components in the embodiment 1, and dispersing for 10min at the rotating speed of 600 rpm;
s2, putting the amine neutralizer, the wetting agent and the defoaming agent in corresponding parts by weight into the dispersion cylinder in the step S1, increasing the rotating speed to 800rpm, dispersing for 10min, adding the film-forming assistant and the thickening agent, and continuing to disperse for 10 min;
s3, reducing the rotating speed to 400rpm, adding a flatting agent, increasing the rotating speed to 1200rpm, dispersing at a high speed for 30min, scraping glass without shrinkage cavity, and enabling the fineness of a fineness plate to be less than 30 mu m;
and S4, reducing the rotating speed to 800rpm, sequentially adding the white pulp, the wax assistant and the preservative, and dispersing for 15min to obtain the product.
Comparative example 1: a water-based two-component matte white finish, which is different from example 1 in that no polyurethane is added to the component a.
Comparative example 2: an aqueous two-component matte white finish, different from example 1, was prepared in that no IPDI was added to the B component.
Comparative example 3: the difference between the water-based double-component matte white finish and the example 1 is that PMA is adopted to replace IPDI in the component B.
Comparative example 4: an aqueous two-component matte white finish was different from example 1 in that no HDI was added to component b.
Comparative example 5: the difference between the water-based double-component matte white finish and the water-based double-component matte white finish in example 1 is that PMA is adopted in the component B to replace HDI.
Performance testing
The aqueous two-component white top coats obtained in examples 1 to 10 and comparative examples 1 to 5 were subjected to performance tests, and the gloss, initial viscosity of the coating, and recovered viscosity and gloss of the recovered oil were counted in Table 2.
As can be seen from the test data in Table 2, the viscosity increases for examples 1-10 are all relatively small, whereas the viscosity increases for comparative examples 1-10 are relatively large, with the viscosity increases being greatest for comparative example 3 and comparative example 5. In addition, the recycling viscosity of the coating materials of the examples 1 to 10 is relatively stable, the effect is optimal, and the viscosity of the comparative example 2 and the comparative example 4 is the maximum and is unstable.
Table 2 results of performance testing
The aqueous two-component white topcoats obtained in examples 1 to 10 and comparative examples 1 to 5 were subjected to performance tests, and the adhesion of the coating, the 1-week water resistance, the adhesion of the recovered oil, and the 1-week water resistance were counted in Table 3.
As can be seen from the test data in Table 3, the paint in examples 1-10 still has composite standard adhesion and 0 grade after being recycled, and has no abnormal water resistance in 1 week; after the coatings of comparative examples 1-5 are recycled, wherein the adhesion force of the recycled oil in comparative example 1 and comparative examples 1, 3 and 5 is reduced to level 1, the water resistance of 1 week is not abnormal, while the adhesion force of the recycled oil in comparative examples 2 and 4 obviously does not meet the standard requirement and the water resistance of 1 week has bubble phenomenon, which shows that the waterborne two-component white finish paint prepared by using the low-hydroxyl resin as the raw material to be compounded with the polyurethane resin and using HDI and IPDI to be compounded as the curing agent has the advantages of long service life and recycling use.
Table 3 results of performance testing
| Detecting the index | Adhesion force | 1 week water resistance | Adhesion of recovered oil | Recovery of oil1 week water resistance |
| Standard requirements | Grade not less than 1 | No abnormality | Grade not less than 1 | No abnormality |
| Example 1 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 2 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 3 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 4 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 5 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 6 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 7 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 8 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 9 | Level 0 | No abnormality | Level 0 | No abnormality |
| Example 10 | Level 0 | No abnormality | Level 0 | No abnormality |
| Comparative example 1 | Level 0 | No abnormality | Level 1 | No abnormality |
| Comparative example 2 | Level 0 | No abnormality | Stage 2 | Slight bubbling can recover |
| Comparative example 3 | Level 0 | No abnormality | Level 1 | No abnormality |
| Comparative example 4 | Level 0 | No abnormality | Stage 2 | Slight bubbling can recover |
| Comparative example 5 | Level 0 | No abnormality | Level 1 | No abnormality |
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The water-based double-component matte white finish comprises a component A and a component B, and is characterized in that the component A comprises the following components in parts by weight:
hydroxy acrylic resin: 15-40 parts;
polyurethane: 15-40 parts;
amine neutralizer: 0.3-0.8 part;
wetting agent: 0.1-0.5 part;
defoaming agent: 0.5-1 part;
film-forming auxiliary agent: 2-6 parts;
thickening agent: 0.2-0.6 part;
a flatting agent: 0.5-1 part;
white pulp: 25-30 parts;
wax auxiliary agent: 1-3 parts of
Preservative: 0.05-0.1 part;
water: 5-10 parts;
the component B comprises the following components in parts by weight:
HDI: 32-64 parts;
IPDI: 20-60 parts;
PGDA: 7-15 parts;
dehydrating agent: 0.1 to 0.5 portion.
2. The aqueous two-component matte white finish according to claim 1, wherein the hydroxyl acrylic resin has a hydroxyl content of 1.5-3.9%.
3. The aqueous two-component matte white finish according to claim 1, wherein the coalescent is a combination of DPM and EDG in a 1:1 ratio.
4. The waterborne two-component matte white finish according to claim 1, wherein the matting agent is fumed silica.
5. The aqueous two-component matte white finish according to claim 1, wherein the wax adjuvant is one of a microcrystalline wax emulsion, a carnauba wax emulsion, and a polyethylene wax emulsion.
6. The aqueous two-component matte white finish according to claim 1, wherein the amine neutralizer is AMP-95, the wetting agent is BYK-346, and the preservative is DOW 342.
7. The aqueous two-component matte white finish according to claim 1, wherein the defoamer is defeng DF-8205 and the thickener is L-1084.
8. The process for the preparation of an aqueous two-component matte white finish according to any one of claims 1 to 7, wherein the A component is obtained by the following preparation steps:
s1, putting the hydroxyl acrylic resin and the polyurethane in corresponding parts by weight into a dispersion cylinder, and dispersing for 5-10min at the rotating speed of 400-600 rpm;
s2, putting the amine neutralizer, the wetting agent and the defoaming agent in corresponding parts by weight into the dispersion tank in the step S1, increasing the rotating speed to 600-800rpm, dispersing for 5-10min, adding the film-forming assistant and the thickening agent, and continuing to disperse for 5-10 min;
s3, reducing the rotating speed to 300-400rpm, adding a flatting agent, increasing the rotating speed to 1000-1200rpm, dispersing at high speed for 30min, scraping glass without shrinkage cavity, and making the fineness of a fineness plate less than 30 μm;
s4, reducing the rotating speed to 600-800rpm, sequentially adding white pulp, wax auxiliary agent and preservative, and dispersing for 10-15min to obtain the product;
the component B is obtained by the following preparation steps:
mixing PGDA and dehydrating agent, dehydrating thoroughly, adding the HDI and IPDI premix, charging nitrogen gas into dispersion cylinder, discharging the mixed curing agent, and sealing immediately for later use.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112341920A (en) * | 2020-11-16 | 2021-02-09 | 深圳市方润环境科技有限公司 | Preparation method of waterborne polyurethane coating with high adhesive force and long usable time |
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| CN113248999A (en) * | 2021-05-22 | 2021-08-13 | 上海立邦长润发涂料有限公司 | Recyclable water-based double-component white finish suitable for mechanical spraying and preparation method thereof |
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| CN114106675A (en) * | 2021-11-25 | 2022-03-01 | 上海展辰涂料有限公司 | Water-based double-component skin-feel matte clear finish paint and preparation method thereof |
| CN116102964A (en) * | 2022-12-08 | 2023-05-12 | 上海立邦长润发涂料有限公司 | PU color-modifying paint for UV and preparation method thereof |
| CN116102964B (en) * | 2022-12-08 | 2024-02-20 | 河南立邦长润发科技材料有限公司 | PU color-modifying paint for UV and preparation method thereof |
| CN116218342A (en) * | 2023-01-05 | 2023-06-06 | 湖州龙珠高分子新材料有限公司 | Preparation method of water-based double-component full-feel matte finish paint |
| CN116218342B (en) * | 2023-01-05 | 2024-02-13 | 湖州龙珠高分子新材料有限公司 | Preparation method of water-based double-component full-feel matte finish paint |
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Application publication date: 20200519 |