In the formulation of water-based paint, the choice of emulsion raw material is the most important decision for the engineer. The main properties of the paint are determined by the resin. There are a wide variety of water-based acrylate emulsions, including polystyrene-acrylate emulsions, which are mixed in the market. The different composition of water-based acrylate resin has great influence on the film-forming property and cost of water-based paint. A few influencing factors are briefly discussed here Principal raw material A. Styrene: The main reason for the introduction of this monomer in polyacrylate emulsion is that it can provide a higher glass transition temperature (Tg), thereby increasing the hardness of film formation; Another reason is cost. Styrene is used greatly in the packaging industry and is one of the most important and mature downstream products in the petroleum industry, with low prices but large macroeconomic impacts. However, the introduction of styrene, especially when its content is higher than 15% of the total monomer content, will also bring many negative effects on the film formation of water-based paint. First of all, the polymer chain segment containing styrene lacks flexibility, and the water-based paint film is hard but not tough at the macro level. There is also the benzene ring contained in styrene, which is the absorber of ultraviolet light. When the monomer content is high, the ultraviolet light will shear the polymer chain through the adjacent benzene ring, which makes the water-based paint film brittle, the gloss decreases, and the life decreases. The structure of styrene also determines that it has affinity for many organic solvents, and the solvent resistance of water-based paint film is also significantly different from that of other resins. B. Acrylate monomers: There are many types of acrylate monomers, and their performance and price vary greatly. The most commonly used is butyl acrylate, which has the lowest cost of monomer, and is the monomer of emulsion used by most emulsion manufacturers to manufacture cheap wall paint with styrene. Its function is to provide the flexibility of water-based paint film. Because there is no group except ester group on the main chain of acrylate polymerization, the flexibility of the main chain and the ester group side chain is good, so that the water-based paint film lacks hardness. Although this kind of polyacrylate emulsion is the choice of building interior and exterior paint, it is not enough as a wood paint with high hardness and toughness requirements. C. Methacrylate monomer: methacrylate monomer, compared with acrylic monomer in the performance of a further step. Because there are more methyl groups on the main chain of methacrylate polymerization, the activity of the main chain is limited, the steel of the main chain is enhanced, and the ester side chain provides flexibility, making the methacrylate monomer have the best balance of hardness and...

The application of water-based ink coating is very wide, mainly reflected in the following aspects: 1.Printing industry Water-based inks can be used to print a variety of paper and packaging materials, such as books, newspapers, magazines, posters, gift boxes, etc. All kinds of paper such as kraft paper, coated paper, thermal paper, Glasin paper, release paper and corrugated board can be printed with water-based ink. 2.Packaging industry Water-based inks also play an important role in the packaging industry and can be used to print various packaging materials, such as cartons, plastic bags, aluminum foil and so on. The rapid drying characteristics of water-based inks help improve production efficiency and do not produce irritating odors, making the surface of the product more beautiful and safe. 3.Spray advertising Water-based ink is also widely used in the outdoor inkjet advertising industry, it can be uniform and durable printing on various material surfaces, such as screen printing, inkjet printing, etc., with good light resistance and weather resistance, so that printed works can maintain bright colors for a long time in both indoor and outdoor environments. Sinograce Chemical production of water-based acrylic resin, polyurethane resin for printing ink,suitable for water-based surface printing ink, screen printing ink, flexo printing ink and gravure ink, good color development, excellent adhesion, with offset printing, good adhesion, resolubility and good color development characteristics, welcome to consult.

01 Conditions for film formation Stowing operation The water evaporates, and the particles are close to each other to achieve a dense charging state Fusion process The surface layer of the particles is destroyed, and the particles are in contact with each other. Diffusion process The molecular chains between the dispersion particles are diffused with each other to form a homogeneous film with certain mechanical properties 02 Film forming properties The film forming property of the emulsion refers to the ability of the emulsion to form a uniform film on the surface of the substrate after it is applied to the bottom. The film forming performance of polyurethane emulsion is closely related not only to the molecular weight of polyurethane vinegar, the type and number of residual solvents in the emulsion, the average diameter of particles and the viscosity of the emulsion, but also to the curing rate of the emulsion. If the residual stock of volatile solvent is large, the curing rate of emulsion is fast, and the cured film is easy to produce bubbles, shrink and wrinkle. If a small amount of high boiling point solvent is added to the emulsion, the curing rate will not be affected, and a flat film without bubbles can be obtained. The particle diameter also affects the curing rate. The smaller the diameter, the slower the curing rate, but the better the film formation, the better the physical and mechanical properties of the cured film. The requirements for emulsion viscosity depend on the specific application. 03 The development direction of waterborne polyurethane The future development trend of polyurethane is to develop water-based polyurethane with high performance, low energy consumption and no pollution. In the next few years, the development direction of water-based polyurethane will mainly focus on the following aspects. 1.Improve the water resistance of waterborne polyurethane. 2.improve the stability of waterborne polyurethane, while maintaining water resistance of waterborne polyurethane, improve the storage stability of waterborne polyurethane is an important direction of foreign waterborne polyurethane research. 3. improve the solid content of water-based polyurethane, the current production of water-based polyurethane solid content is more than 20% to 40%, drying and transportation costs are high, should try to improve it; If the solid content is increased to more than 45%, the drying rate at the drying temperature of 40 to 60°C can be similar to the drying rate of ordinary solvent-based polyurethane resin at room temperature. 4.Strengthen the research of composite modified water-dispersed polyurethane, and use the designability of polyurethane molecules to introduce molecular structures with special functions on the polyurethane chain, such as fluorine-containing and silicon-containing polymer chains, so that the coating film has more functionality. 5.Develop antistatic and antibacterial water-based polyurethane. 6.The research on high so...

Glove PU coating refers to coating the outer layer of gloves with a layer of polyurethane (PU) material. This coating has a variety of functions, mainly including: Oil and chemical resistance: makes the gloves suitable for work environments where oils and chemicals need to be handled. Anti-slip and wear resistance: Enhances the stability of the gloves in wet or greasy environments, reduces the risk of hand sliding, and extends the service life of the gloves. Comfort and breathability: provides a good wearing experience, making the gloves both comfortable and breathable. Anti-static function: help to reduce the accumulation of static electricity, avoid static electricity damage to electronic equipment. These properties make PU-coated gloves ideal for safe use in various industries. Sinograce Chemical supply safety gloves coating water based polyurethane dispersion, and nitrile latex, butadiene latex and waterborne polyurethane condom dispersion liquid, disposable gloves latex, welcome to buy.