BES Sodium Salt 66992-27-6 Can Be Used In The Synthesis Of Waterborne Polyurethane Coatings

In today's era where environmental protection and high-performance materials are in high demand, waterborne polyurethane (WPU) has become a popular choice in the fields of coatings, adhesives, and leather finishing due to its low volatile organic compound (VOC) emissions and excellent physical properties. However, the stability of pH value during its preparation process and the durability of the final product's performance have always been the focus of industry attention. Today, we will delve into how an innovative biological buffer, N, N-di (2-hydroxyethyl) -2-aminoethanesulfonic acid sodium salt (BES sodium salt), can bring revolutionary improvements to water-based polyurethane materials, and analyze the scientific principles and market value behind it for you.

1, Unique advantages of BES sodium salt

BES sodium salt is a zwitterionic biological buffering agent with highly stable pH buffering capacity (effective buffering range 6.4-7.8), widely used in biochemical and molecular biology experiments. The sulfonic acid groups and hydroxyethyl side chains in its molecular structure endow it with excellent water solubility and chemical stability, while not interfering with most biochemical reactions. This characteristic makes it one of the most ideal pH regulators in aqueous systems. Compared to traditional buffering agents such as phosphates, BES sodium salt not only has stronger buffering capacity, but also has better metal ion chelation ability and low toxicity, which is in line with the development trend of green chemistry.

BES Sodium Salt

2, The challenge of waterborne polyurethane: why do we need BES sodium salt?

The preparation of waterborne polyurethane usually involves the emulsification and chain extension process of polyols and isocyanates. The stability of pH value directly affects the stability, particle size distribution and final film forming performance of lotion. Traditional pH regulators, such as ammonia or organic amine, are volatile, which may lead to pH drift during storage, causing lotion condensation or viscosity changes. In addition, residual alkaline substances may catalyze side reactions and reduce the hydrolysis resistance of the material. The introduction of BES sodium salt perfectly solves these problems. Its strong buffering capacity can maintain a constant pH value of the system during preparation and use, ensuring the consistency of the reaction. At the same time, the sulfonic acid group in BES sodium salt can also form hydrogen bond with the polyurethane chain segment to enhance the electrostatic stability and mechanical properties of the lotion.

3, Application mechanism of BES sodium salt in waterborne polyurethane

PH control during the emulsification stage: During the pre polymer emulsification process, BES sodium salt maintains a neutral acidic environment, inhibits side reactions between isocyanate groups and water, reduces CO ₂ generation, and avoids coating defects.

Enhance the stability of lotion: the zwitterionic characteristics of BES sodium salt can be adsorbed on the surface of lotion particles, forming a double electric layer structure, preventing particle aggregation and improving storage stability.

Improving film-forming performance: The hydroxyethyl group of BES sodium salt can crosslink with polyurethane segments, enhancing the water resistance and mechanical strength of the coating film. Experiments have shown that the addition of BES sodium salt to waterborne polyurethane coatings can increase hardness by more than 20% and significantly improve wear resistance.

N. N-Bis (2-hydroxyethyl) -2-aminoethanesulfonic acid sodium salt (BES sodium salt), as an efficient biological buffering agent, has brought a qualitative leap to water-based polyurethane materials through its unique pH stability and molecular interaction ability. From improving production efficiency to optimizing end product performance, BES sodium salt is not only a model of technological innovation, but also an important engine for promoting the commercialization of environmentally friendly materials.

Product packaging

Hubei Xindesheng Materials Co., Ltd. is a direct manufacturer of BES sodium salt, with professional technical personnel and advanced production equipment. It has advantages in technical synthesis and can provide customers with technical support and good after-sales service at any time. At present, in addition to producing BES sodium salt, Desheng also sells conventional biological buffering agents such as TRIS, BICINE, HEPES, TAPS, MOPS, etc. If you are interested, please click on the official website to learn more details!