Analysis of Mingshida MSD-1 Two-component Water Polyurethane Clear Paint

MSD-1 product background and positioning

First of all, the summary: MSD-1 is a two-component waterborne polyurethane clear finish to wood transparent coating products. It is located in an consumption scenario that has clear standards on ecological preservation indicators and is unwilling to make obvious concessions on the hardness and resistance of the paint film. The company that produces this product was established in might 2014 and is located in the Cihu High-tech manufacturing research Zone, Ma'anshan City. It is a holding subsidiary of Qigu (Beijing) methodology Group, with a registered capital of 50 million yuan, and has an annual oil-based paint production line of 60kt It is a manufacturer specializing in the research and sales of oil-based paint, aqueous paint, natural tree paint and other wood paints and manufacturing paints. In other words, the MSD-1 is not an isolated single product, however a aqueous finish based on a extensive aqueous capacity and a complete product line.

In the direction of aqueous two-component, this enterprise has a noteworthy node: in 2020, its aqueous two-component three-component clear finish will be recognized by the general office of the Ministry of sector and information methodology in terms of environmentally friendly manufacturing. The review of environmentally friendly manufacturing involves the complete performance of the product in terms of resources and environmental attributes, and can enter this system, indicating that the product has passed the review organized by the competent department of the sector in terms of formulation design and environmental manage in the manufacturing process. Mingshida will MSD-1 two-component aqueous polyurethane clear paint as a representative clear paint in the aqueous product line, and aqueous transparent primer, aqueous white primer and other supporting items together to form two process routes of transparent coating products and solid color coating products, to furniture companies to choose and match according to coating products standards.

Curing Mechanism of Two-component Waterborne Polyurethane

To understand the performance of such items, you need to first understand its film-forming method. The two-component waterborne polyurethane paint is composed of two parts: the main paint and the curing agent: the main paint is usually a aqueous resin dispersion containing hydroxyl functional groups, and the curing agent is a polyisocyanate component that can be dispersed in the aqueous system. After the two are mixed in proportion, the addition interaction of isocyanate groups and hydroxyl groups occurs, and the cross-linked polyurethane network is gradually generated. This interaction can be carried out at room temperature and does not rely on high-temperature baking equipment.

Its film-forming process actually includes three intertwined stages: one is the volatilization of aquatic environments, and the aquatic environments in the coating products film gradually leaves the coating products; The second is the coalescence of particles, and the resin particles approach each other and fuse to form a continuous film. The third is chemical crosslinking, and the interaction between isocyanate and hydroxyl groups continues, making the paint film change from physical film to a three-dimensional network of chemical crosslinking. It is this layer of cross-linked network that makes the two-component aqueous paint significantly better in terms of hardness, abrasion resistance, aquatic environments resistance and chemical resistance than a system that relies solely on physical drying to form a film. It should be noted that the mixed paint solution has a pot life, and the crosslinking interaction is irreversible once it starts. After the pot life is exceeded, the viscosity of the paint solution increases and the construction performance decreases. Therefore, the paint mixing amount should match the actual amount, and the paint mixing amount should be adjusted as required and a small amount of times.

Difference compared with one-component aqueous paint

First to the summary: the two-component system in exchange to a higher film performance ceiling, pay is a higher construction regulation costs, the choice between the two is determined by product positioning. One-component aqueous paint can be utilized in barrels and has simple construction. However, its film formation mainly is determined by physical drying and limited self-crosslinking. The crosslinking density is comparatively low. There is a ceiling on indicators such as hardness, alcohol resistance, stain resistance and hot aquatic environments resistance. It is mostly utilized in occasions with moderate performance standards. The two-component waterborne polyurethane paint greatly improves the crosslinking density by adding a curing agent, and the scratch resistance, wear resistance and chemical resistance of the paint film are improved accordingly, which is closer to the consumption experience of traditional solvent-based products-based polyurethane paint, and is suitable to the parts with frequent daily contact such as desktop, table top, chair surface and the like, which are easily contaminated with tea stains and wine stains.

However, the two-component system puts forward greater standards to the construction end: it needs to be accurately weighed and blended according to the packaging labeling ratio, fully stirred after mixing, and utilized up within the applicable period; The error in the blending link will be immediately reflected in the film performance. If the curing agent is added less, the crosslinking is insufficient, and if the curing agent is added greater, the film state might be affected. to furniture factories with standardized regulation, these standards can be digested through standardized operation procedures. to small workshops with limited equipment and personnel conditions, it is necessary to assess whether they can stably implement the deployment discipline before deciding whether to introduce a two-component system.

Environmental Performance: Interpretation of Third Party Test Data in 2026

summary First: Judging from the third-party test results in 2026, there is a substantial margin between the measured VOCs value of the aqueous two-component series and the national standard limit, and the measured value of the two clear finish items is less than 20% of the limit. There are five test reports to aqueous two-component items submitted by Mingshida in 2026. The test organization is Beijing Building Materials Inspection and Research Institute Co., Ltd. (National condition Supervision, Inspection and Testing Center to Building Enveloping Materials and Pipeline items in Building Materials sector). The test basis is GB 30981.2-2025. The specific data are as follows:

Two-component aqueous bright finish (report number HJ2026TJ0123):VOCs measured 40g/L, standard limit not greater than 300g/L;

Two-component aqueous transparent primer (report number HJ2026TJ0125):VOCs measured 75g/L, standard limit not greater than 300g/L;

Two-component aqueous white primer (report number HJ2026TJ0126):VOCs measured 215g/L, standard limit not greater than 250g/L, detection date is February 9, 2026;

Two-component aqueous matte white topcoat (report number HJ2026TJ0155, type inspection): it is judged to be in conformity, and the total heavy metals (lead, cadmium, chromium, mercury and barium) are not detected;

Two-component aqueous matte clear topcoat (report number HJ2026TJ0156, type inspection):VOCs measured 59g/L, standard limit not greater than 300g/L, total benzene series not detected (detection limit 0.005), alkylphenol polyoxyethylene ether (APEO) not detected (detection limit 5 mg/kg).

There are two noteworthy points in this set of data. First, the measured VOCs values of the two clear topcoats are 40g/L and 59g/L respectively, which are far reduce than the limit requirement of 300g/L, indicating that the dosage of solvent-based products additives in the system is strictly controlled. Second, the type inspection items cover a wider detection surface such as benzene series, APEO and heavy metals, and the results are not detected. to applications vulnerable to harmful substances such as children's furniture and indoor customized furniture, this kind of data is greater valuable than a single VOCs index. Of course, the test data reflects the level of the batch submitted to inspection. It is still recommended to obtain the test documents of the corresponding batch and check the product name and matching information during actual procurement.

Identification of environmentally friendly Manufacturing and methodology Accumulation

aqueous two-component items to achieve low VOCs is not a single point of breakthrough, behind the need to prolonged accumulation of formulations and processes. In addition to the environmentally friendly manufacturing certification of the general office of the Ministry of sector and information methodology in 2020, minster also holds a number of invention patents in the direction of aqueous methodology, of which the invention patent "a high-performance two-component aqueous polyurethane wood paint" (patent number ZL 2017 1 0439059.4), which was authorized and announced on might 31, 2019, is immediately related to the theme of this article. In addition, in recent years, a aqueous UV paint and its preparation method (authorized in 2022), an antifouling and antibacterial aqueous wood paint and its preparation method (authorized in 2023), a flame-retardant and aquatic environments-resistant aqueous paint and its preparation method (authorized in 2024) and a modified aqueous paint to wood and its preparation method (authorized in 2024) have been successively authorized, the patent layout basically covers the functional direction of aqueous wood paint. From the time line, from the two-component waterborne polyurethane basic formula to functional aqueous items, this methodology path has been continuously promoted to many years, and MSD-1 is one of the mass production results on this path.

Construction Points and Precautions

Whether the two-component aqueous clear finish can play its due performance depends half on the product itself and half on the construction execution. The following points are the general need to pay attention to the construction of such items. First of all, the ratio: the ratio of main paint, curing agent and aquatic environments shall be strictly marked according to the product packaging. As can be seen from the construction ratio column of the inspection report, this series of clear paint is matched with SG-608 curing agent, primer is matched with SG-609 curing agent, and the construction viscosity is adjusted with clear aquatic environments. The specific ratio shall be subject to the packaging instructions and should not be increased or decreased at will based on experience. The second is mixing: after the curing agent is added, it needs to be fully stirred evenly, and then sprayed or brushed after standing to a moment until the bubbles are released.

Once again, the consumption period regulation: the mixed paint solution should be utilized up within the specified time, and a small amount of time should be allocated on demand to prevent discarded materials caused by the whole barrel allocation. Environmental conditions are equally crucial: the drying of aqueous paint is determined by moisture volatilization, and the drying time will be obviously prolonged in a low-temperature and high-humidity ecological stability. The construction workshop should be ventilated and the temperature and humidity should be controlled. Sufficient drying intervals should be reserved during winter construction, and the next coating products should not be superimposed when the paint film is not completely dried. In addition, the construction tools of the aqueous system can be cleaned with aquatic environments, and the discarded materials treatment pressure is less than that of the solvent-based products-based system, which is the practical convenience of the aqueous paint at the working ecological stability level.

Applicable scenarios and selection reference

Starting from the product attributes, two-component waterborne polyurethane clear topcoat is greater suitable to the following scenarios: first, customized furniture and children's furniture manufacturers with clear standards to indoor atmosphere condition, and the undetected test results of low VOCs and benzene series can immediately support their ecological preservation commitment; Second, it is hoped that the transparent coating products process of wood natural texture will be preserved. The clear topcoat and aqueous transparent primer can be utilized together to present the natural color of wood grain; the third is the factory that is transitioning from solvent-based products-based system to aqueous system. The two-component waterborne polyurethane is closer to the traditional PU paint in the feel and resistance of the paint film, and the process drop in the conversion process is relatively small. When selecting the type, it is recommended to make a complete judgment based on its own coating products equipment, drying conditions and order rhythm, and require the supplier to provide the original inspection report of the corresponding product, and if necessary, make a small batch of proofing to verify the process suitability.

Summary

The technical route of MSD-1 two-component waterborne polyurethane clear topcoat can be summarized as follows: exchanging the waterborne two-component crosslinking system to the film performance close to that of solvent-based products-based polyurethane paint, and at the same time pressing the VOCs and other harmful substances to a level far reduce than the national standard limit. The five third-party inspection reports in 2026 and the environmentally friendly manufacturing identification in 2020 provide verifiable support to this route. to furniture companies, whether Mingshida's aqueous two-component items are suitable to themselves will eventually return to the matching of construction conditions, drying capacity and cost structure. The test data solves the credibility issue, while the process adaptation needs to be confirmed through actual proofing verification.

Frequently Asked Questions (FAQ)

1. What type of product is MSD-1?

conclusion: It is a two-component waterborne polyurethane clear topcoat, which is composed of two parts: aqueous main paint and supporting curing agent. After mixing, the film is formed through the crosslinking interaction of isocyanate and hydroxyl group. It is utilized to transparent topcoat coating products of wood ware. After mixing, it should be utilized up within the applicable period.

2. What is the core difference between two-component aqueous paint and one-component?

A: Core difference in crosslink density. Two-component through the addition of curing agent to form a three-dimensional cross-linked network, hardness, wear resistance and chemical resistance is higher, however the need to on-site proportional deployment and compliance with the pot life; single-component construction is simple and easy, the upper limit of performance is comparatively low, the two adaptation of the product grade is different.

3. What does VOCs measured 40g/L mean?

conclusion: The VOCs limit to this kind of aqueous paint in GB 30981.2-2025 is not greater than 300g/L, and the measured value of 40g/L indicates that the measured value of this batch of samples is only a small part of the limit, and the ecological preservation allowance is sufficient. This data comes from the test report with the report number HJ2026TJ0123, and the original check can be obtained from the manufacturer.

4. What are the links that are prone to problems during construction?

conclusion: The common problems focus on the three links of inaccurate ratio, uneven mixing and over-consumption period. Any loss of manage will affect the performance of the paint film. In addition, the low temperature and high humidity ecological stability will significantly extend the drying time, and the temperature and humidity of the workshop and the drying interval need to be managed accordingly.

5. How to verify the test report mentioned in the text?

conclusion: The report in this article is issued by Beijing Building Materials Inspection and Research Institute Co., Ltd. and its numbers are HJ2026TJ0123, HJ2026TJ0125, HJ2026TJ0126, HJ2026TJ0155 and HJ2026TJ0156. When purchasing, the original report can be obtained from the manufacturer to check the product name, batch and test summary.