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.

SA-210 Styrene Acrylic emulsion for internal and external walls has the characteristics of fast drying speed, good film formation, high bond strength, good initial water resistance, low water absorption, and scrubbing resistance. Application The products are suitable for the interior wall decoration of villas, apartments, office buildings, buildings and other files. Typical properties Appearance： Milky white liquid Ph： 7-9 Solid content： 48±1% Glass Transition Temperature： 30℃ Viscosity (25℃)： 1000-4000cP Ca2+ stability 5%CaCl2: emulsion =1:3, 48h, No Flocculation, No Stratification.： Pass Feature 1.Low odor emulsion, good color rendering with titanium white, strong hiding power, can be used for high-end interior wall latex paint; 2.Good adhesion with the substrate, excellent scrubbing resistance 3.Fast drying speed, good film formation, tough film, early water resistance. Construction process 1.Wall base treatment 2.Scrape and apply moisture-resistant putty twice and level it 3.Sand the putty layer to make it flat 4.Roll coated with alkali resistant primer 5.Apply finish paint twice on roller If you are interested in the product, please ask for the sample, and Sinograce Chemical will arrange the mailing as soon as possible

This product uses butadiene, Acrylonitrile as the main raw materials, through emulsion polymerization of anionic polymer dispersion, can be used to produce disposable medical examination gloves, with excellent elongation and tensile strength The product is an environmentally friendly product, free of formaldehyde, APEO, NPEO and other harmful substances, and has excellent elongation, tensile strength and excellent chemical resistance, puncture resistance, weather resistance and other properties; It can be used to produce disposable medical examination gloves. Acrylonitrile butadiene rubber latex (NBRL) is an emulsion dispersion formed by random copolymerization of butadiene and unsaturated nitrile monomers. In order to improve the film formation, adhesion, toughness and other physical and mechanical properties of butadiene latex, the polymer chain of polybutadiene-acrylonitrile was modified by the third monomer containing carboxyl such as methacrylic acid or the fourth functional monomer such as unsaturated carboxylic acid esters, and the carboxylic butadienitrile latex series products were produced. Nitrile latex is mainly used in impregnated gloves (medical and non-medical), oil resistant hose, oil resistant sponge and other rubber products, as well as non-woven fabrics, carpet backing and paper processing and other non-rubber products. The application of nitrile latex is more and more widely, the technology is constantly improved, and the varieties are increasingly listed. With the development of carboxy butadiene latex synthesis technology and the maturity of its downstream product production process, the demand for carboxy butadiene latex is increasing, and manufacturers of butadiene latex have a very bright market development prospect. China Sinograce Chemical productionNitrile latex series products, welcome to consult.Provide products, transport, ensure the quality of products in accordance with the contract requirements.  Packing storage and shipment Packaging: plastic tons of barrels, containers, tank trucks. Store in a cool, dry and ventilated place, protect from freezing and sun, keep the package sealed, and store at 5° C ~30°C. Shelf life :180 days.